VM Options Explorer - OpenJDK9 HotSpot

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NameSinceDeprecatedTypeOSCPUComponentDefaultAvailabilityDescriptionDefined in
SinceDeprecatedTypeOSCPUComponentAvailability
AOTLibraryOpenJDK10ccstrlistruntimeNULLproductAOT librarysrc/share/vm/runtime/globals.hpp
AbortVMOnExceptionMessageOpenJDK10ccstrruntimeNULLdiagnosticCall fatal if the exception pointed by AbortVMOnException has this messagesrc/share/vm/runtime/globals.hpp
AbortVMOnExceptionOpenJDK10ccstrruntimeNULLdiagnosticCall fatal if this exception is thrown. Example: java -XX:AbortVMOnException=java.lang.NullPointerException Foosrc/share/vm/runtime/globals.hpp
AdaptiveSizeDecrementScaleFactorOpenJDK10uintxruntime4
range(1, max_uintx)
productAdaptive size scale down factor for shrinkingsrc/share/vm/runtime/globals.hpp
AdaptiveSizeMajorGCDecayTimeScaleOpenJDK10uintxruntime10
range(0, max_uintx)
productTime scale over which major costs decaysrc/share/vm/runtime/globals.hpp
AdaptiveSizePolicyCollectionCostMarginOpenJDK10uintxruntime50
range(0, 100)
productIf collection costs are within margin, reduce both by full deltasrc/share/vm/runtime/globals.hpp
AdaptiveSizePolicyGCTimeLimitThresholdOpenJDK10uintxruntime5
range(1, max_uintx)
developNumber of consecutive collections before gc time limit firessrc/share/vm/runtime/globals.hpp
AdaptiveSizePolicyInitializingStepsOpenJDK10uintxruntime20
range(0, max_uintx)
productNumber of steps where heuristics is used before data is usedsrc/share/vm/runtime/globals.hpp
AdaptiveSizePolicyOutputIntervalOpenJDK10uintxruntime0
range(0, max_uintx)
productCollection interval for printing information; zero means neversrc/share/vm/runtime/globals.hpp
AdaptiveSizePolicyReadyThresholdOpenJDK10uintxruntime5developNumber of collections before the adaptive sizing is startedsrc/share/vm/runtime/globals.hpp
AdaptiveSizePolicyWeightOpenJDK10uintxruntime10
range(0, 100)
productWeight given to exponential resizing, between 0 and 100src/share/vm/runtime/globals.hpp
AdaptiveSizeThroughPutPolicyOpenJDK10uintxruntime0
range(0, 1)
productPolicy for changing generation size for throughput goalssrc/share/vm/runtime/globals.hpp
AdaptiveTimeWeightOpenJDK10uintxruntime25
range(0, 100)
productWeight given to time in adaptive policy, between 0 and 100src/share/vm/runtime/globals.hpp
AggressiveOptsOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproductEnable aggressive optimizations - see arguments.cppsrc/share/vm/runtime/globals.hpp
AggressiveUnboxingOpenJDK10boolc2falseexperimentalControl optimizations for aggressive boxing eliminationsrc/share/vm/opto/c2_globals.hpp
AliasLevelOpenJDK10intxc23
range(0, 3)
product0 for no aliasing, 1 for oop/field/static/array split,
2 for class split, 3 for unique instances
src/share/vm/opto/c2_globals.hpp
AlignVectorOpenJDK10boolc2trueproductPerform vector store/load alignment in loopsrc/share/vm/opto/c2_globals.hpp
AllocateInstancePrefetchLinesOpenJDK10intxruntime1
range(1, 64)
productNumber of lines to prefetch ahead of instance allocation pointersrc/share/vm/runtime/globals.hpp
AllocatePrefetchDistanceOpenJDK10intxruntime-1productDistance to prefetch ahead of allocation pointer. -1: use system-specific value (automatically determinedsrc/share/vm/runtime/globals.hpp
AllocatePrefetchInstrOpenJDK10intxruntime0productSelect instruction to prefetch ahead of allocation pointersrc/share/vm/runtime/globals.hpp
AllocatePrefetchLinesOpenJDK10intxruntime3
range(1, 64)
productNumber of lines to prefetch ahead of array allocation pointersrc/share/vm/runtime/globals.hpp
AllocatePrefetchStepSizeOpenJDK10intxruntime16
range(1, 512)
productStep size in bytes of sequential prefetch instructionssrc/share/vm/runtime/globals.hpp
AllocatePrefetchStyleOpenJDK10intxruntime1
range(0, 3)
product0 = no prefetch,
1 = generate prefetch instructions for each allocation,
2 = use TLAB watermark to gate allocation prefetch,
3 = generate one prefetch instruction per cache line
src/share/vm/runtime/globals.hpp
AllowExtshmOpenJDK10boolaixfalseproductAllow VM to run with EXTSHM=ON.src/os/aix/vm/globals_aix.hpp
AllowJNIEnvProxyOpenJDK10Deprecated in JDK13
Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductAllow JNIEnv proxies for jdbxsrc/share/vm/runtime/globals.hpp
AllowNonVirtualCallsOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproductObey the ACC_SUPER flag and allow invokenonvirtual callssrc/share/vm/runtime/globals.hpp
AllowParallelDefineClassOpenJDK10boolruntimefalseproductAllow parallel defineClass requests for class loaders registering as parallel capablesrc/share/vm/runtime/globals.hpp
AllowUserSignalHandlersOpenJDK10boolruntimefalseproductDo not complain if the application installs signal handlers (Solaris & Linux only)src/share/vm/runtime/globals.hpp
AllowVectorizeOnDemandOpenJDK10boolc2trueproductGlobally supress vectorization set in VectorizeMethodsrc/share/vm/opto/c2_globals.hpp
AlwaysActAsServerClassMachineOpenJDK10boolruntimefalseproductAlways act like a server-class machinesrc/share/vm/runtime/globals.hpp
AlwaysAtomicAccessesOpenJDK10boolruntimefalseexperimentalAccesses to all variables should always be atomicsrc/share/vm/runtime/globals.hpp
AlwaysCompileLoopMethodsOpenJDK10boolruntimefalseproductWhen using recompilation, never interpret methods containing loopssrc/share/vm/runtime/globals.hpp
AlwaysIncrementalInlineOpenJDK10boolc2falsedevelopdo all inlining incrementallysrc/share/vm/opto/c2_globals.hpp
AlwaysLockClassLoaderOpenJDK10boolruntimefalseproductRequire the VM to acquire the class loader lock before calling loadClass() even for class loaders registering as parallel capablesrc/share/vm/runtime/globals.hpp
AlwaysPreTouchOpenJDK10boolruntimefalseproductForce all freshly committed pages to be pre-touchedsrc/share/vm/runtime/globals.hpp
AlwaysRestoreFPUOpenJDK10boolruntimefalseproductRestore the FPU control word after every JNI call (expensive)src/share/vm/runtime/globals.hpp
AlwaysSafeConstructorsOpenJDK10boolruntimefalseexperimentalForce safe construction, as if all fields are final.src/share/vm/runtime/globals.hpp
AlwaysTenureOpenJDK10boolruntimefalseproductAlways tenure objects in eden (ParallelGC only)src/share/vm/runtime/globals.hpp
ArrayAllocatorMallocLimitOpenJDK10size_truntimeSOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1)experimentalAllocation less than this value will be allocated using malloc. Larger allocations will use mmap.src/share/vm/runtime/globals.hpp
ArrayCopyLoadStoreMaxElemOpenJDK10intxc28
range(0, max_intx)
productMaximum number of arraycopy elements inlined as a sequence ofloads/storessrc/share/vm/opto/c2_globals.hpp
ArraycopyDstPrefetchDistanceOpenJDK10uintxsparc0productDistance to prefetch destination array in arraycopysrc/cpu/sparc/vm/globals_sparc.hpp
ArraycopySrcPrefetchDistanceOpenJDK10uintxsparc0productDistance to prefetch source array in arraycopysrc/cpu/sparc/vm/globals_sparc.hpp
AssertOnSuspendWaitFailureOpenJDK10boolruntimefalseproductAssert/Guarantee on external suspend wait failuresrc/share/vm/runtime/globals.hpp
AssertRangeCheckEliminationOpenJDK10boolc1falsedevelopAssert Range Check Eliminationsrc/share/vm/c1/c1_globals.hpp
AssumeMPOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproductInstruct the VM to assume multiple processors are availablesrc/share/vm/runtime/globals.hpp
AttachListenerTimeoutOpenJDK10intxaix1000
range(0, 2147483)
productTimeout in ms the attach listener waits for a requestsrc/os/aix/vm/globals_aix.hpp
AutoBoxCacheMaxOpenJDK10intxc2128
range(0, max_jint)
productSets max value cached by the java.lang.Integer autobox cachesrc/share/vm/opto/c2_globals.hpp
AutoGCSelectPauseMillisOpenJDK6uintxruntime5000
range(0, max_uintx)
productAutomatic GC selection pause threshold in millisecondssrc/share/vm/runtime/globals.hpp
AvoidUnalignedAccessesOpenJDK10boolaarch64falseproductAvoid generating unaligned memory accessessrc/cpu/aarch64/vm/globals_aarch64.hpp
BCEATraceLevelOpenJDK10intxruntime0
range(0, 3)
productHow much tracing to do of bytecode escape analysis estimates (0-3)src/share/vm/runtime/globals.hpp
BackEdgeThresholdOpenJDK6intxaarch64c1100000define_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
BackEdgeThresholdOpenJDK6intxaarch64c2100000define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
BackgroundCompilationOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
BackgroundCompilationOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
BackgroundCompilationOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
BackgroundCompilationOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
BackgroundCompilationOpenJDK10boolruntimeproduct_pdA thread requesting compilation is not blocked during compilationsrc/share/vm/runtime/globals.hpp
BackgroundCompilationOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
BackgroundCompilationOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
BackgroundCompilationOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
BackgroundCompilationOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
BackgroundCompilationOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
BackgroundCompilationOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
BackgroundCompilationOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
BackgroundCompilationOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
BackgroundCompilationOpenJDK10boolzerosharktruedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
BailoutAfterHIROpenJDK10boolc1falsedevelopbailout of compilation after building of HIRsrc/share/vm/c1/c1_globals.hpp
BailoutAfterLIROpenJDK10boolc1falsedevelopbailout of compilation after building of LIRsrc/share/vm/c1/c1_globals.hpp
BailoutOnExceptionHandlersOpenJDK10boolc1falsedevelopbailout of compilation for methods with exception handlerssrc/share/vm/c1/c1_globals.hpp
BailoutToInterpreterForThrowsOpenJDK10boolc2falsedevelopCompiled methods which throws/catches exceptions will be deopt and intp.src/share/vm/opto/c2_globals.hpp
BaseFootPrintEstimateOpenJDK10size_truntime256*M
range(0, max_uintx)
productEstimate of footprint other than Java Heapsrc/share/vm/runtime/globals.hpp
BciProfileWidthOpenJDK10intxruntime2developNumber of return bci's to record in ret profilesrc/share/vm/runtime/globals.hpp
BiasedLockingBulkRebiasThresholdOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
intxruntime20
range(0, max_intx)
productThreshold of number of revocations per type to try to rebias all objects in the heap of that typesrc/share/vm/runtime/globals.hpp
BiasedLockingBulkRevokeThresholdOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
intxruntime40
range(0, max_intx)
productThreshold of number of revocations per type to permanently revoke biases of all objects in the heap of that typesrc/share/vm/runtime/globals.hpp
BiasedLockingDecayTimeOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
intxruntime25000
range(500, max_intx)
productDecay time (in milliseconds) to re-enable bulk rebiasing of a type after previous bulk rebiassrc/share/vm/runtime/globals.hpp
BiasedLockingStartupDelayOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
intxruntime4000
range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran)))
productNumber of milliseconds to wait before enabling biased lockingsrc/share/vm/runtime/globals.hpp
BinarySwitchThresholdOpenJDK10intxruntime5developMinimal number of lookupswitch entries for rewriting to binary switchsrc/share/vm/runtime/globals.hpp
BindCMSThreadToCPUOpenJDK10boolruntimefalsediagnosticBind CMS Thread to CPU if possiblesrc/share/vm/runtime/globals.hpp
BindGCTaskThreadsToCPUsOpenJDK10Obsoleted in JDK14
Expired in JDK16
boolruntimefalseproductBind GCTaskThreads to CPUs if possiblesrc/share/vm/runtime/globals.hpp
BlockCopyLowLimitOpenJDK10intxsparc2048
range(1, max_jint)
productMinimum size in bytes when block copy will be usedsrc/cpu/sparc/vm/globals_sparc.hpp
BlockLayoutByFrequencyOpenJDK10boolc2trueproductUse edge frequencies to drive block orderingsrc/share/vm/opto/c2_globals.hpp
BlockLayoutMinDiamondPercentageOpenJDK10intxc220
range(0, 100)
productMiniumum %% of a successor (predecessor) for which block layout a will allow a fork (join) in a single chainsrc/share/vm/opto/c2_globals.hpp
BlockLayoutRotateLoopsOpenJDK10boolc2trueproductAllow back branches to be fall throughs in the block layoutsrc/share/vm/opto/c2_globals.hpp
BlockOffsetArrayUseUnallocatedBlockOpenJDK10boolruntimefalsediagnosticMaintain _unallocated_block in BlockOffsetArray (currently applicable only to CMS collector)src/share/vm/runtime/globals.hpp
BlockZeroingLowLimitOpenJDK10intxaarch64256
range(1, max_jint)
productMinimum size in bytes when block zeroing will be usedsrc/cpu/aarch64/vm/globals_aarch64.hpp
BlockZeroingLowLimitOpenJDK10intxsparc2048
range(1, max_jint)
productMinimum size in bytes when block zeroing will be usedsrc/cpu/sparc/vm/globals_sparc.hpp
BootstrapJVMCIOpenJDK10booljvmcifalseexperimentalBootstrap JVMCI before running Java main methodsrc/share/vm/jvmci/jvmci_globals.hpp
BranchOnRegisterOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolc2falseproductUse Sparc V9 branch-on-register opcodessrc/share/vm/opto/c2_globals.hpp
BreakAtNodeOpenJDK10intxc20notproductBreak at construction of this Node (either _idx or _debug_idx)src/share/vm/opto/c2_globals.hpp
BreakAtWarningOpenJDK10boolruntimefalsedevelopExecute breakpoint upon encountering VM warningsrc/share/vm/runtime/globals.hpp
BytecodeVerificationLocalOpenJDK10boolruntimefalseproductEnable the Java bytecode verifier for local classessrc/share/vm/runtime/globals.hpp
BytecodeVerificationRemoteOpenJDK10boolruntimetrueproductEnable the Java bytecode verifier for remote classessrc/share/vm/runtime/globals.hpp
C1BreakpointOpenJDK10boolc1falsedevelopSets a breakpoint at entry of each compiled methodsrc/share/vm/c1/c1_globals.hpp
C1OptimizeVirtualCallProfilingOpenJDK10boolc1trueproductUse CHA and exact type results at call sites when updating MDOssrc/share/vm/c1/c1_globals.hpp
C1ProfileBranchesOpenJDK10boolc1trueproductProfile branches when generating code for updating MDOssrc/share/vm/c1/c1_globals.hpp
C1ProfileCallsOpenJDK10boolc1trueproductProfile calls when generating code for updating MDOssrc/share/vm/c1/c1_globals.hpp
C1ProfileCheckcastsOpenJDK10boolc1trueproductProfile checkcasts when generating code for updating MDOssrc/share/vm/c1/c1_globals.hpp
C1ProfileInlinedCallsOpenJDK10boolc1trueproductProfile inlined calls when generating code for updating MDOssrc/share/vm/c1/c1_globals.hpp
C1ProfileVirtualCallsOpenJDK10boolc1trueproductProfile virtual calls when generating code for updating MDOssrc/share/vm/c1/c1_globals.hpp
C1UpdateMethodDataOpenJDK10boolc1trueInTieredproductUpdate MethodData*s in Tier1-generated codesrc/share/vm/c1/c1_globals.hpp
CIBreakAtOSROpenJDK10intxruntime-1developThe id of osr compilation to break atsrc/share/vm/runtime/globals.hpp
CIBreakAtOpenJDK10intxruntime-1developThe id of compilation to break atsrc/share/vm/runtime/globals.hpp
CICompileNativesOpenJDK10boolruntimetruedevelopcompile native methods if supported by the compilersrc/share/vm/runtime/globals.hpp
CICompileOSROpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
CICompileOSROpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
CICompileOSROpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
CICompileOSROpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
CICompileOSROpenJDK10boolruntimedevelop_pdcompile on stack replacement methods if supported by the compilersrc/share/vm/runtime/globals.hpp
CICompileOSROpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
CICompileOSROpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
CICompileOSROpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
CICompileOSROpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
CICompileOSROpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
CICompileOSROpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
CICompileOSROpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
CICompileOSROpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
CICompileOSROpenJDK10boolzerosharktruedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
CICompilerCountPerCPUOpenJDK10boolruntimefalseproduct1 compiler thread for log(N CPUs)src/share/vm/runtime/globals.hpp
CICompilerCountOpenJDK10intxruntimeCI_COMPILER_COUNT
range(0, max_jint)
productNumber of compiler threads to runsrc/share/vm/runtime/globals.hpp
CICountOSROpenJDK10boolruntimefalsedevelopuse a separate counter when assigning ids to osr compilationssrc/share/vm/runtime/globals.hpp
CICrashAtOpenJDK10intxruntime-1notproductid of compilation to trigger assert in compiler thread for the purpose of testing, e.g. generation of replay datasrc/share/vm/runtime/globals.hpp
CIFireOOMAtOpenJDK10intxruntime-1developFire OutOfMemoryErrors throughout CI for testing the compiler (non-negative value throws OOM after this many CI accesses in each compile)src/share/vm/runtime/globals.hpp
CIObjectFactoryVerifyOpenJDK10boolruntimefalsenotproductenable potentially expensive verification in ciObjectFactorysrc/share/vm/runtime/globals.hpp
CIPrintCompileQueueOpenJDK10boolruntimefalsediagnosticdisplay the contents of the compile queue whenever a compilation is enqueuedsrc/share/vm/runtime/globals.hpp
CIPrintCompilerNameOpenJDK10boolruntimefalsedevelopwhen CIPrint is active, print the name of the active compilersrc/share/vm/runtime/globals.hpp
CIPrintMethodCodesOpenJDK10boolruntimefalsedevelopprint method bytecodes of the compiled codesrc/share/vm/runtime/globals.hpp
CIPrintRequestsOpenJDK10boolruntimefalsedevelopdisplay every request for compilationsrc/share/vm/runtime/globals.hpp
CIPrintTypeFlowOpenJDK10boolruntimefalsedevelopprint the results of ciTypeFlow analysissrc/share/vm/runtime/globals.hpp
CIStartOSROpenJDK10intxruntime0developThe id of the first osr compilation to permit (CICountOSR must be on)src/share/vm/runtime/globals.hpp
CIStartOpenJDK10intxruntime0developThe id of the first compilation to permitsrc/share/vm/runtime/globals.hpp
CIStopOSROpenJDK10intxruntimemax_jintdevelopThe id of the last osr compilation to permit (CICountOSR must be on)src/share/vm/runtime/globals.hpp
CIStopOpenJDK10intxruntimemax_jintdevelopThe id of the last compilation to permitsrc/share/vm/runtime/globals.hpp
CITimeEachOpenJDK10boolruntimefalsedevelopdisplay timing information after each successful compilationsrc/share/vm/runtime/globals.hpp
CITimeVerboseOpenJDK10boolruntimefalsedevelopbe more verbose in compilation timingssrc/share/vm/runtime/globals.hpp
CITimeOpenJDK10boolruntimefalseproductcollect timing information for compilationsrc/share/vm/runtime/globals.hpp
CITraceTypeFlowOpenJDK10boolruntimefalsedevelopdetailed per-bytecode tracing of ciTypeFlow analysissrc/share/vm/runtime/globals.hpp
CMSAbortSemanticsOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductWhether abort-on-overflow semantics is implementedsrc/share/vm/runtime/globals.hpp
CMSAbortablePrecleanMinWorkPerIterationOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime100
range(0, max_uintx)
productNominal minimum work per abortable preclean iterationsrc/share/vm/runtime/globals.hpp
CMSAbortablePrecleanWaitMillisOpenJDK10intxruntime100
range(0, max_intx)
manageableTime that we sleep between iterations when not given enough work per iterationsrc/share/vm/runtime/globals.hpp
CMSBitMapYieldQuantumOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntime10*M
range(1, max_uintx)
productBitmap operations should process at most this many bits between yieldssrc/share/vm/runtime/globals.hpp
CMSBootstrapOccupancyOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime50
range(0, 100)
productPercentage CMS generation occupancy at which to initiate CMS collection for bootstrapping collection statssrc/share/vm/runtime/globals.hpp
CMSCheckIntervalOpenJDK10uintxruntime1000developInterval in milliseconds that CMS thread checks if it should start a collection cyclesrc/share/vm/runtime/globals.hpp
CMSClassUnloadingEnabledOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductWhether class unloading enabled when using CMS GCsrc/share/vm/runtime/globals.hpp
CMSClassUnloadingMaxIntervalOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime0
range(0, max_uintx)
productWhen CMS class unloading is enabled, the maximum CMS cycle count for which classes may not be unloadedsrc/share/vm/runtime/globals.hpp
CMSCleanOnEnterOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductClean-on-enter optimization for reducing number of dirty cardssrc/share/vm/runtime/globals.hpp
CMSConcMarkMultipleOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntime32
range(1, SIZE_MAX / 4096)
productSize (in cards) of CMS concurrent MT marking tasksrc/share/vm/runtime/globals.hpp
CMSConcurrentMTEnabledOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductWhether multi-threaded concurrent work enabled (effective only if ParNewGC)src/share/vm/runtime/globals.hpp
CMSCoordinatorYieldSleepCountOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime10
range(0, max_juint)
productNumber of times the coordinator GC thread will sleep while yielding before giving up and resuming GCsrc/share/vm/runtime/globals.hpp
CMSEdenChunksRecordAlwaysOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductAlways record eden chunks used for the parallel initial mark or remark of edensrc/share/vm/runtime/globals.hpp
CMSExpAvgFactorOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime50
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponential averages for CMS statisticssrc/share/vm/runtime/globals.hpp
CMSExtrapolateSweepOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductCMS: cushion for block demand during sweepsrc/share/vm/runtime/globals.hpp
CMSIncrementalSafetyFactorOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime10
range(0, 100)
productPercentage (0-100) used to add conservatism when computing the duty cyclesrc/share/vm/runtime/globals.hpp
CMSIndexedFreeListReplenishOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime4
range(1, max_uintx)
productReplenish an indexed free list with this number of chunkssrc/share/vm/runtime/globals.hpp
CMSInitiatingOccupancyFractionOpenJDK10Obsoleted in JDK14
Expired in JDK15
intxruntime-1
range(min_intx, 100)
productPercentage CMS generation occupancy to start a CMS collection cycle. A negative value means that CMSTriggerRatio is usedsrc/share/vm/runtime/globals.hpp
CMSIsTooFullPercentageOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime98
range(0, 100)
productAn absolute ceiling above which CMS will always consider the unloading of classes when class unloading is enabledsrc/share/vm/runtime/globals.hpp
CMSLargeCoalSurplusPercentOpenJDK10Obsoleted in JDK14
Expired in JDK15
doubleruntime0.95
range(0.0, DBL_MAX)
productCMS: the factor by which to inflate estimated demand of large block sizes to prevent coalescing with an adjoining blocksrc/share/vm/runtime/globals.hpp
CMSLargeSplitSurplusPercentOpenJDK10Obsoleted in JDK14
Expired in JDK15
doubleruntime1.00
range(0.0, DBL_MAX)
productCMS: the factor by which to inflate estimated demand of large block sizes to prevent splitting to supply demand for smaller blockssrc/share/vm/runtime/globals.hpp
CMSLoopWarnOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductWarn in case of excessive CMS loopingsrc/share/vm/runtime/globals.hpp
CMSMarkStackOverflowALotOpenJDK10boolruntimefalsenotproductSimulate frequent marking stack / work queue overflowsrc/share/vm/runtime/globals.hpp
CMSMarkStackOverflowIntervalOpenJDK10uintxruntime1000notproductAn 'interval' counter that determines how frequently to simulate overflow; a smaller number increases frequencysrc/share/vm/runtime/globals.hpp
CMSMaxAbortablePrecleanLoopsOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime0
range(0, max_uintx)
productMaximum number of abortable preclean iterations, if > 0src/share/vm/runtime/globals.hpp
CMSMaxAbortablePrecleanTimeOpenJDK10Obsoleted in JDK14
Expired in JDK15
intxruntime5000
range(0, max_intx)
productMaximum time in abortable preclean (in milliseconds)src/share/vm/runtime/globals.hpp
CMSOldPLABMaxOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntime1024
range(1, max_uintx)
productMaximum size of CMS gen promotion LAB caches per worker per block sizesrc/share/vm/runtime/globals.hpp
CMSOldPLABMinOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntime16
range(1, max_uintx)
productMinimum size of CMS gen promotion LAB caches per worker per block sizesrc/share/vm/runtime/globals.hpp
CMSOldPLABNumRefillsOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime4
range(1, max_uintx)
productNominal number of refills of CMS gen promotion LAB cache per worker per block sizesrc/share/vm/runtime/globals.hpp
CMSOldPLABReactivityFactorOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime2
range(1, max_uintx)
productThe gain in the feedback loop for on-the-fly PLAB resizing during a scavengesrc/share/vm/runtime/globals.hpp
CMSOldPLABResizeQuickerOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductReact on-the-fly during a scavenge to a sudden change in block demand ratesrc/share/vm/runtime/globals.hpp
CMSOldPLABToleranceFactorOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime4
range(1, max_uintx)
productThe tolerance of the phase-change detector for on-the-fly PLAB resizing during a scavengesrc/share/vm/runtime/globals.hpp
CMSPLABRecordAlwaysOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductAlways record survivor space PLAB boundaries (effective only if CMSParallelSurvivorRemarkEnabled)src/share/vm/runtime/globals.hpp
CMSParallelInitialMarkEnabledOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductUse the parallel initial mark.src/share/vm/runtime/globals.hpp
CMSParallelRemarkEnabledOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductWhether parallel remark enabled (only if ParNewGC)src/share/vm/runtime/globals.hpp
CMSParallelSurvivorRemarkEnabledOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductWhether parallel remark of survivor space enabled (effective only if CMSParallelRemarkEnabled)src/share/vm/runtime/globals.hpp
CMSPrecleanDenominatorOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime3
range(1, max_uintx)
productCMSPrecleanNumerator:CMSPrecleanDenominator yields convergence ratiosrc/share/vm/runtime/globals.hpp
CMSPrecleanIterOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime3
range(0, 9)
productMaximum number of precleaning iteration passessrc/share/vm/runtime/globals.hpp
CMSPrecleanNumeratorOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime2
range(0, max_uintx-1)
productCMSPrecleanNumerator:CMSPrecleanDenominator yields convergence ratiosrc/share/vm/runtime/globals.hpp
CMSPrecleanRefLists1OpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductPreclean ref lists during (initial) preclean phasesrc/share/vm/runtime/globals.hpp
CMSPrecleanRefLists2OpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductPreclean ref lists during abortable preclean phasesrc/share/vm/runtime/globals.hpp
CMSPrecleanSurvivors1OpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductPreclean survivors during (initial) preclean phasesrc/share/vm/runtime/globals.hpp
CMSPrecleanSurvivors2OpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductPreclean survivors during abortable preclean phasesrc/share/vm/runtime/globals.hpp
CMSPrecleanThresholdOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime1000
range(100, max_uintx)
productDo not iterate again if number of dirty cards is less than thissrc/share/vm/runtime/globals.hpp
CMSPrecleaningEnabledOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductWhether concurrent precleaning enabledsrc/share/vm/runtime/globals.hpp
CMSPrintChunksInDumpOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductIf logging for the 'gc' and 'promotion' tags is enabled ontrace level include more detailed information about thefree chunkssrc/share/vm/runtime/globals.hpp
CMSPrintObjectsInDumpOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductIf logging for the 'gc' and 'promotion' tags is enabled ontrace level include more detailed information about theallocated objectssrc/share/vm/runtime/globals.hpp
CMSRemarkVerifyVariantOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime1
range(1, 2)
productChoose variant (1,2) of verification following remarksrc/share/vm/runtime/globals.hpp
CMSReplenishIntermediateOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductReplenish all intermediate free-list cachessrc/share/vm/runtime/globals.hpp
CMSRescanMultipleOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntime32
range(1, SIZE_MAX / 4096)
productSize (in cards) of CMS parallel rescan tasksrc/share/vm/runtime/globals.hpp
CMSSamplingGrainOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime16*K
range(ObjectAlignmentInBytes, max_uintx)
productThe minimum distance between eden samples for CMS (see above)src/share/vm/runtime/globals.hpp
CMSScavengeBeforeRemarkOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductAttempt scavenge before the CMS remark stepsrc/share/vm/runtime/globals.hpp
CMSScheduleRemarkEdenPenetrationOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime50
range(0, 100)
productThe Eden occupancy percentage (0-100) at which to try and schedule remark pausesrc/share/vm/runtime/globals.hpp
CMSScheduleRemarkEdenSizeThresholdOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntime2*M
range(0, max_uintx)
productIf Eden size is below this, do not try to schedule remarksrc/share/vm/runtime/globals.hpp
CMSScheduleRemarkSamplingRatioOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime5
range(1, max_uintx)
productStart sampling eden top at least before young gen occupancy reaches 1/<ratio> of the size at which we plan to schedule remarksrc/share/vm/runtime/globals.hpp
CMSSmallCoalSurplusPercentOpenJDK10Obsoleted in JDK14
Expired in JDK15
doubleruntime1.05
range(0.0, DBL_MAX)
productCMS: the factor by which to inflate estimated demand of small block sizes to prevent coalescing with an adjoining blocksrc/share/vm/runtime/globals.hpp
CMSSmallSplitSurplusPercentOpenJDK10Obsoleted in JDK14
Expired in JDK15
doubleruntime1.10
range(0.0, DBL_MAX)
productCMS: the factor by which to inflate estimated demand of small block sizes to prevent splitting to supply demand for smaller blockssrc/share/vm/runtime/globals.hpp
CMSSplitIndexedFreeListBlocksOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductWhen satisfying batched demand, split blocks from the IndexedFreeList whose size is a multiple of requested sizesrc/share/vm/runtime/globals.hpp
CMSTestInFreeListOpenJDK10boolruntimefalsedevelopCheck if the coalesced range is already in the free lists as claimedsrc/share/vm/runtime/globals.hpp
CMSTriggerIntervalOpenJDK10intxruntime-1
range(-1, max_intx)
manageableCommence a CMS collection cycle (at least) every so many milliseconds (0 permanently, -1 disabled)src/share/vm/runtime/globals.hpp
CMSTriggerRatioOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime80
range(0, 100)
productPercentage of MinHeapFreeRatio in CMS generation that is allocated before a CMS collection cycle commencessrc/share/vm/runtime/globals.hpp
CMSVerifyReturnedBytesOpenJDK10boolruntimefalsenotproductCheck that all the garbage collected was returned to the free listssrc/share/vm/runtime/globals.hpp
CMSWaitDurationOpenJDK10intxruntime2000
range(min_jint, max_jint)
manageableTime in milliseconds that CMS thread waits for young GCsrc/share/vm/runtime/globals.hpp
CMSWorkQueueDrainThresholdOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime10
range(1, max_juint)
productDon't drain below this size per parallel worker/thiefsrc/share/vm/runtime/globals.hpp
CMSYieldSleepCountOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime0
range(0, max_juint)
productNumber of times a GC thread (minus the coordinator) will sleep while yielding before giving up and resuming GCsrc/share/vm/runtime/globals.hpp
CMSYieldOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductYield between steps of CMSsrc/share/vm/runtime/globals.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxaarch6464*Mdefine_pd_global// default max size of CMS young gen, per GC worker threadsrc/cpu/aarch64/vm/globals_aarch64.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_tarm16*Mdefine_pd_global// default max size of CMS young gen, per GC worker threadsrc/cpu/arm/vm/globals_arm.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_truntimeproduct_pdThe maximum size of young gen chosen by default per GC worker thread availablesrc/share/vm/runtime/globals.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_tppc16*Mdefine_pd_global// Default max size of CMS young gen, per GC worker thread.src/cpu/ppc/vm/globals_ppc.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_ts39016*Mdefine_pd_global// Default max size of CMS young gen, per GC worker thread.src/cpu/s390/vm/globals_s390.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_tsparc16*Mdefine_pd_global// default max size of CMS young gen, per GC worker threadsrc/cpu/sparc/vm/globals_sparc.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_tx8664*Mdefine_pd_global// default max size of CMS young gen, per GC worker threadsrc/cpu/x86/vm/globals_x86.hpp
CMSYoungGenPerWorkerOpenJDK10Obsoleted in JDK14
Expired in JDK15
size_tzero16*Mdefine_pd_global// default max size of CMS young gen, per GC worker threadsrc/cpu/zero/vm/globals_zero.hpp
CMS_FLSPaddingOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime1
range(0, max_juint)
productThe multiple of deviation from mean to use for buffering against volatility in free list demandsrc/share/vm/runtime/globals.hpp
CMS_FLSWeightOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime75
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying averages for CMS FLS statisticssrc/share/vm/runtime/globals.hpp
CMS_SweepPaddingOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime1
range(0, max_juint)
productThe multiple of deviation from mean to use for buffering against volatility in inter-sweep durationsrc/share/vm/runtime/globals.hpp
CMS_SweepTimerThresholdMillisOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime10
range(0, max_uintx)
productSkip block flux-rate sampling for an epoch unless inter-sweep duration exceeds this threshold in millisecondssrc/share/vm/runtime/globals.hpp
CMS_SweepWeightOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime75
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying average for inter-sweep durationsrc/share/vm/runtime/globals.hpp
CPUForCMSThreadOpenJDK10uintxruntime0
range(0, max_juint)
diagnosticWhen BindCMSThreadToCPU is true, the CPU to bind CMS thread tosrc/share/vm/runtime/globals.hpp
CSEArrayLengthOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
CSEArrayLengthOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
CSEArrayLengthOpenJDK10boolc1develop_pdCreate separate nodes for length in array accessessrc/share/vm/c1/c1_globals.hpp
CSEArrayLengthOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
CSEArrayLengthOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
CSEArrayLengthOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
CSEArrayLengthOpenJDK10boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
CanonicalizeNodesOpenJDK10boolc1truedevelopCanonicalize graph nodessrc/share/vm/c1/c1_globals.hpp
CheckAssertionStatusDirectivesOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalsenotproductTemporary - see javaClasses.cppsrc/share/vm/runtime/globals.hpp
CheckCompressedOopsOpenJDK10boolruntimetruenotproductGenerate checks in encoding/decoding code in debug VMsrc/share/vm/runtime/globals.hpp
CheckEndorsedAndExtDirsOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
boolruntimefalseproductVerify the endorsed and extension directories are not usedsrc/share/vm/runtime/globals.hpp
CheckIntrinsicsOpenJDK10boolruntimetruediagnosticWhen a class C is loaded, check that (1) all intrinsics defined by the VM for class C are present in the loaded class file and are marked with the @HotSpotIntrinsicCandidate annotation, that (2) there is an intrinsic registered for all loaded methods that are annotated with the @HotSpotIntrinsicCandidate annotation, and that (3) no orphan methods exist for class C (i.e., methods for which the VM declares an intrinsic but that are not declared in the loaded class C. Check (3) is available only in debug builds.src/share/vm/runtime/globals.hpp
CheckJNICallsOpenJDK10boolruntimefalseproductVerify all arguments to JNI callssrc/share/vm/runtime/globals.hpp
CheckMemoryInitializationOpenJDK10boolruntimefalsenotproductCheck memory initializationsrc/share/vm/runtime/globals.hpp
CheckUnhandledOopsOpenJDK10boolruntimefalsedevelopCheck for unhandled oops in VM codesrc/share/vm/runtime/globals.hpp
CheckZapUnusedHeapAreaOpenJDK10boolruntimefalsedevelopCheck zapping of unused heap spacesrc/share/vm/runtime/globals.hpp
ClassUnloadingWithConcurrentMarkOpenJDK10boolruntimetrueproductDo unloading of classes with a concurrent marking cyclesrc/share/vm/runtime/globals.hpp
ClassUnloadingOpenJDK10boolruntimetrueproductDo unloading of classessrc/share/vm/runtime/globals.hpp
CleanChunkPoolAsyncOpenJDK10boolruntimetruedevelopClean the chunk pool asynchronouslysrc/share/vm/runtime/globals.hpp
ClearFPUAtParkOpenJDK6intxruntime0experimental(Unsafe, Unstable)src/share/vm/runtime/globals.hpp
ClipInliningOpenJDK10boolruntimetrueproductClip inlining if aggregate method exceeds DesiredMethodLimitsrc/share/vm/runtime/globals.hpp
CodeCacheExpansionSizeOpenJDK10intxaarch64c132*Kdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
CodeCacheExpansionSizeOpenJDK10intxaarch64c264*Kdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
CodeCacheExpansionSizeOpenJDK10size_tarmc132*Kdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
CodeCacheExpansionSizeOpenJDK10size_tarmc232*Kdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
CodeCacheExpansionSizeOpenJDK10uintxruntimeproduct_pdCode cache expansion size (in bytes)src/share/vm/runtime/globals.hpp
CodeCacheExpansionSizeOpenJDK10intxppcc132*Kdefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
CodeCacheExpansionSizeOpenJDK10intxppcc264*Kdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
CodeCacheExpansionSizeOpenJDK10uintxs390c132*Kdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
CodeCacheExpansionSizeOpenJDK10uintxs390c264*Kdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
CodeCacheExpansionSizeOpenJDK10intxsparcc132*Kdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
CodeCacheExpansionSizeOpenJDK10intxsparcc232*Kdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
CodeCacheExpansionSizeOpenJDK10intxx86c132*Kdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
CodeCacheExpansionSizeOpenJDK10intxx86c232*Kdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
CodeCacheExpansionSizeOpenJDK10intxzeroshark32*Kdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
CodeCacheMinBlockLengthOpenJDK10uintxaarch64c11define_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
CodeCacheMinBlockLengthOpenJDK10uintxaarch64c24define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
CodeCacheMinBlockLengthOpenJDK10uintxarmc11define_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
CodeCacheMinBlockLengthOpenJDK10uintxarmc24define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
CodeCacheMinBlockLengthOpenJDK10uintxruntimediagnostic_pdMinimum number of segments in a code cache blocksrc/share/vm/runtime/globals.hpp
CodeCacheMinBlockLengthOpenJDK10uintxppcc11define_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
CodeCacheMinBlockLengthOpenJDK10uintxppcc24define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
CodeCacheMinBlockLengthOpenJDK10uintxs390c11define_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
CodeCacheMinBlockLengthOpenJDK10uintxs390c24define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
CodeCacheMinBlockLengthOpenJDK10uintxsparcc11define_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
CodeCacheMinBlockLengthOpenJDK10uintxsparcc24define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
CodeCacheMinBlockLengthOpenJDK10uintxx86c11define_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
CodeCacheMinBlockLengthOpenJDK10uintxx86c24define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
CodeCacheMinBlockLengthOpenJDK10uintxzeroshark1define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxaarch64c1400*Kdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxaarch64c2400*Kdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
CodeCacheMinimumUseSpaceOpenJDK10size_tarmc1400*Kdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
CodeCacheMinimumUseSpaceOpenJDK10size_tarmc2400*Kdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxruntimedevelop_pdMinimum code cache size (in bytes) required to start VM.src/share/vm/runtime/globals.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxppcc2400*Kdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxs390c1400*Kdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxs390c2400*Kdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxsparcc1400*Kdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxsparcc2400*Kdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxx86c1400*Kdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxx86c2400*Kdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
CodeCacheMinimumUseSpaceOpenJDK10uintxzeroshark200*Kdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
CodeCacheSegmentSizeOpenJDK10uintxaarch6464 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.src/cpu/aarch64/vm/globals_aarch64.hpp
CodeCacheSegmentSizeOpenJDK10uintxarm64 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.src/cpu/arm/vm/globals_arm.hpp
CodeCacheSegmentSizeOpenJDK10uintxruntimedevelop_pdCode cache segment size (in bytes) - smallest unit of allocationsrc/share/vm/runtime/globals.hpp
CodeCacheSegmentSizeOpenJDK10uintxppc128define_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
CodeCacheSegmentSizeOpenJDK10uintxs390256define_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
CodeCacheSegmentSizeOpenJDK10uintxsparc64 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.src/cpu/sparc/vm/globals_sparc.hpp
CodeCacheSegmentSizeOpenJDK10uintxx8664 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.src/cpu/x86/vm/globals_x86.hpp
CodeCacheSegmentSizeOpenJDK10uintxzero64 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.src/cpu/zero/vm/globals_zero.hpp
CodeEntryAlignmentOpenJDK10intxaarch6464define_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
CodeEntryAlignmentOpenJDK10intxarm16define_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
CodeEntryAlignmentOpenJDK10intxruntimedevelop_pdCode entry alignment for generated code (in bytes)src/share/vm/runtime/globals.hpp
CodeEntryAlignmentOpenJDK10intxppc128define_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
CodeEntryAlignmentOpenJDK10intxs39064define_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
CodeEntryAlignmentOpenJDK10intxsparc32define_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
CodeEntryAlignmentOpenJDK10intxx8616define_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
CodeEntryAlignmentOpenJDK10intxzero32define_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
CollectIndexSetStatisticsOpenJDK10boolruntimefalsenotproductCollect information about IndexSetssrc/share/vm/runtime/globals.hpp
CommentedAssemblyOpenJDK10boolc1trueInDebugdevelopShow extra info in PrintNMethods outputsrc/share/vm/c1/c1_globals.hpp
CompactFieldsOpenJDK10Deprecated in JDK14
Obsoleted in JDK15
Expired in JDK16
boolruntimetrueproductAllocate nonstatic fields in gaps between previous fieldssrc/share/vm/runtime/globals.hpp
CompactStringsOpenJDK10boolaarch64truedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
CompactStringsOpenJDK10boolarmfalsedefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
CompactStringsOpenJDK10boolruntimeproduct_pdEnable Strings to use single byte chars in backing storesrc/share/vm/runtime/globals.hpp
CompactStringsOpenJDK10boolppctruedefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
CompactStringsOpenJDK10bools390truedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
CompactStringsOpenJDK10boolsparctruedefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
CompactStringsOpenJDK10boolx86truedefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
CompactStringsOpenJDK10boolzerofalsedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
CompilationPolicyChoiceOpenJDK10Deprecated in JDK13
Obsoleted in JDK14
Expired in JDK15
intxruntime0
range(0, 3)
productwhich compilation policy (0-3)src/share/vm/runtime/globals.hpp
CompileCommandFileOpenJDK10ccstrruntimeNULLproductRead compiler commands from this file [.hotspot_compiler]src/share/vm/runtime/globals.hpp
CompileCommandOpenJDK10ccstrlistruntimePrepend to .hotspot_compiler; e.g. log,java/lang/String.productsrc/share/vm/runtime/globals.hpp
CompileOnlyOpenJDK10ccstrlistruntimeList of methods (pkg/class.name) to restrict compilation toproductsrc/share/vm/runtime/globals.hpp
CompileTheWorldPreloadClassesOpenJDK10boolruntimetruedevelopPreload all classes used by a class before start loadingsrc/share/vm/runtime/globals.hpp
CompileTheWorldSafepointIntervalOpenJDK10intxruntime100notproductForce a safepoint every n compiles so sweeper can keep upsrc/share/vm/runtime/globals.hpp
CompileTheWorldStartAtOpenJDK10intxruntime1notproductFirst class to consider when using +CompileTheWorldsrc/share/vm/runtime/globals.hpp
CompileTheWorldStopAtOpenJDK10intxruntimemax_jintnotproductLast class to consider when using +CompileTheWorldsrc/share/vm/runtime/globals.hpp
CompileTheWorldOpenJDK10boolruntimefalsedevelopCompile all methods in all classes in bootstrap class path (stress test)src/share/vm/runtime/globals.hpp
CompileThresholdScalingOpenJDK10doubleruntime1.0
range(0.0, DBL_MAX)
productFactor to control when first compilation happens (both with and without tiered compilation): values greater than 1.0 delay counter overflow, values between 0 and 1.0 rush counter overflow, value of 1.0 leaves compilation thresholds unchanged value of 0.0 is equivalent to -Xint. Flag can be set as per-method option. If a value is specified for a method, compilation thresholds for that method are scaled by both the value of the global flag and the value of the per-method flag.src/share/vm/runtime/globals.hpp
CompileThresholdOpenJDK10intxaarch64c11500define_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
CompileThresholdOpenJDK10intxaarch64c210000define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
CompileThresholdOpenJDK10intxarmc11500define_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
CompileThresholdOpenJDK10intxarmc210000define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
CompileThresholdOpenJDK10intxruntimeproduct_pdnumber of interpreted method invocations before (re-)compilingsrc/share/vm/runtime/globals.hpp
CompileThresholdOpenJDK10intxppcc11000define_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
CompileThresholdOpenJDK10intxppcc210000define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
CompileThresholdOpenJDK10intxs390c11000define_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
CompileThresholdOpenJDK10intxs390c210000define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
CompileThresholdOpenJDK10intxsparcc11000define_pd_global// Design center runs on 1.3.1src/cpu/sparc/vm/c1_globals_sparc.hpp
CompileThresholdOpenJDK10intxsparcc210000define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
CompileThresholdOpenJDK10intxx86c11500define_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
CompileThresholdOpenJDK10intxx86c210000define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
CompileThresholdOpenJDK10intxzeroshark1500define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
CompilerDirectivesFileOpenJDK10ccstrruntimeNULLdiagnosticRead compiler directives from this filesrc/share/vm/runtime/globals.hpp
CompilerDirectivesIgnoreCompileCommandsOpenJDK10boolruntimefalsediagnosticDisable backwards compatibility for compile commands.src/share/vm/runtime/globals.hpp
CompilerDirectivesLimitOpenJDK10intruntime50diagnosticLimit on number of compiler directives.src/share/vm/runtime/globals.hpp
CompilerDirectivesPrintOpenJDK10boolruntimefalsediagnosticPrint compiler directives on installation.src/share/vm/runtime/globals.hpp
CompilerThreadHintNoPreemptOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
boolruntimetrueproduct(Solaris only) Give compiler threads an extra quantasrc/share/vm/runtime/globals.hpp
CompilerThreadPriorityOpenJDK10intxruntime-1
range(min_jint, max_jint)
productThe native priority at which compiler threads should run (-1 means no change)src/share/vm/runtime/globals.hpp
CompilerThreadStackSizeOpenJDK10intxaixppc4096define_pd_globalsrc/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp
CompilerThreadStackSizeOpenJDK10intxbsdx86512define_pd_globalsrc/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp
CompilerThreadStackSizeOpenJDK10intxbsdzero0define_pd_globalsrc/os_cpu/bsd_zero/vm/globals_bsd_zero.hpp
CompilerThreadStackSizeOpenJDK10intxlinuxaarch642048define_pd_globalsrc/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp
CompilerThreadStackSizeOpenJDK10intxlinuxarm512define_pd_globalsrc/os_cpu/linux_arm/vm/globals_linux_arm.hpp
CompilerThreadStackSizeOpenJDK10intxlinuxppc4096define_pd_globalsrc/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp
CompilerThreadStackSizeOpenJDK10intxlinuxs3902048define_pd_globalsrc/os_cpu/linux_s390/vm/globals_linux_s390.hpp
CompilerThreadStackSizeOpenJDK10intxlinuxx86512define_pd_globalsrc/os_cpu/linux_x86/vm/globals_linux_x86.hpp
CompilerThreadStackSizeOpenJDK10intxlinuxzero0define_pd_globalsrc/os_cpu/linux_zero/vm/globals_linux_zero.hpp
CompilerThreadStackSizeOpenJDK10intxruntimeproduct_pdCompiler Thread Stack Size (in Kbytes)src/share/vm/runtime/globals.hpp
CompilerThreadStackSizeOpenJDK10intxsparc512define_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
CompilerThreadStackSizeOpenJDK10intxsolarisx86512define_pd_globalsrc/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp
CompilerThreadStackSizeOpenJDK10intxwindowsx860define_pd_globalsrc/os_cpu/windows_x86/vm/globals_windows_x86.hpp
CompressedClassSpaceSizeOpenJDK10size_truntime1*G
range(1*M, 3*G)
productMaximum size of class area in Metaspace when compressed class pointers are usedsrc/share/vm/runtime/globals.hpp
ComputeExactFPURegisterUsageOpenJDK10boolc1truedevelopCompute additional live set for fpu registers to simplify fpu stack merge (Intel only)src/share/vm/c1/c1_globals.hpp
ConcGCThreadsOpenJDK10uintruntime0productNumber of threads concurrent gc will usesrc/share/vm/runtime/globals.hpp
ConcGCYieldTimeoutOpenJDK10intxruntime0
range(0, max_intx)
developIf non-zero, assert that GC threads yield within this number of millisecondssrc/share/vm/runtime/globals.hpp
ConditionalMoveLimitOpenJDK10intxaarch64c23define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
ConditionalMoveLimitOpenJDK10intxarmc24define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
ConditionalMoveLimitOpenJDK10intxc2product_pdLimit of ops to make speculative when using CMOVEsrc/share/vm/opto/c2_globals.hpp
ConditionalMoveLimitOpenJDK10intxppcc23define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
ConditionalMoveLimitOpenJDK10intxs390c24define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
ConditionalMoveLimitOpenJDK10intxsparcc24define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
ConditionalMoveLimitOpenJDK10intxx86c23define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
ContendedPaddingWidthOpenJDK10intxruntime128
range(0, 8192)
productHow many bytes to pad the fields/classes marked @Contended withsrc/share/vm/runtime/globals.hpp
ConvertCmpD2CmpFOpenJDK10boolc2truedevelopConvert cmpD to cmpF when one input is constant in float rangesrc/share/vm/opto/c2_globals.hpp
ConvertFloat2IntClippingOpenJDK10boolc2truedevelopConvert float2int clipping idiom to integer clippingsrc/share/vm/opto/c2_globals.hpp
ConvertSleepToYieldOpenJDK6Deprecated in JDK9
Obsoleted in JDK10
Expired in JDK11
boolruntimetrueproductConvert sleep(0) to thread yieldsrc/share/vm/runtime/globals.hpp
ConvertYieldToSleepOpenJDK6Deprecated in JDK9
Obsoleted in JDK10
Expired in JDK11
boolruntimefalseproductConvert yield to a sleep of MinSleepInterval to simulate Win32 behaviorsrc/share/vm/runtime/globals.hpp
CountBytecodesOpenJDK10boolruntimefalsedevelopCount number of bytecodes executedsrc/share/vm/runtime/globals.hpp
CountCompiledCallsOpenJDK10boolruntimefalsedevelopCount method invocationssrc/share/vm/runtime/globals.hpp
CountJNICallsOpenJDK10boolruntimefalsedevelopCount jni method invocationssrc/share/vm/runtime/globals.hpp
CountJVMCallsOpenJDK10boolruntimefalsenotproductCount jvm method invocationssrc/share/vm/runtime/globals.hpp
CountLinearScanOpenJDK10boolc1falsedevelopcollect statistic counters during LinearScansrc/share/vm/c1/c1_globals.hpp
CountRemovableExceptionsOpenJDK10boolruntimefalsenotproductCount exceptions that could be replaced by branches due to inliningsrc/share/vm/runtime/globals.hpp
CountRuntimeCallsOpenJDK10boolruntimefalsenotproductCount VM runtime callssrc/share/vm/runtime/globals.hpp
CounterDecayMinIntervalLengthOpenJDK10intxruntime500developThe minimum interval (in milliseconds) between invocation of CounterDecaysrc/share/vm/runtime/globals.hpp
CounterHalfLifeTimeOpenJDK10intxruntime30developHalf-life time of invocation counters (in seconds)src/share/vm/runtime/globals.hpp
CrashGCForDumpingJavaThreadOpenJDK10boolruntimefalsenotproductManually make GC thread crash then dump java stack trace; Test onlysrc/share/vm/runtime/globals.hpp
CrashOnOutOfMemoryErrorOpenJDK10boolruntimefalseproductJVM aborts, producing an error log and core/mini dump, on the first occurrence of an out-of-memory errorsrc/share/vm/runtime/globals.hpp
CreateCoredumpOnCrashOpenJDK10boolruntimetrueproductCreate core/mini dump on VM fatal errorsrc/share/vm/runtime/globals.hpp
CriticalJNINativesOpenJDK10Deprecated in JDK16
Obsoleted in JDK17
Expired in JDK18
boolruntimetrueproductCheck for critical JNI entry pointssrc/share/vm/runtime/globals.hpp
DSCR_DPFD_PPC64OpenJDK10uint64_tppc8productPower8 or later: DPFD (default prefetch depth) value of the Data Stream Control Register. 0: hardware default, 1: none, 2-7: min-max, 8: don't touchsrc/cpu/ppc/vm/globals_ppc.hpp
DSCR_PPC64OpenJDK10uint64_tppc(uintx)-1productPower8 or later: Specify encoded value for Data Stream Control Registersrc/cpu/ppc/vm/globals_ppc.hpp
DSCR_URG_PPC64OpenJDK10uint64_tppc8productPower8 or later: URG (depth attainment urgency) value of the Data Stream Control Register. 0: hardware default, 1: none, 2-7: min-max, 8: don't touchsrc/cpu/ppc/vm/globals_ppc.hpp
DTraceAllocProbesOpenJDK10boolruntimefalseproductEnable dtrace probes for object allocationsrc/share/vm/runtime/globals.hpp
DTraceMethodProbesOpenJDK10boolruntimefalseproductEnable dtrace probes for method-entry and method-exitsrc/share/vm/runtime/globals.hpp
DTraceMonitorProbesOpenJDK10boolruntimefalseproductEnable dtrace probes for monitor eventssrc/share/vm/runtime/globals.hpp
DebugDeoptimizationOpenJDK10boolruntimefalsedevelopTracing various information while debugging deoptimizationsrc/share/vm/runtime/globals.hpp
DebugInlinedCallsOpenJDK10boolc2truediagnosticIf false, restricts profiled locations to the root method onlysrc/share/vm/opto/c2_globals.hpp
DebugNonSafepointsOpenJDK10boolruntimetrueInDebugdiagnosticGenerate extra debugging information for non-safepoints in nmethodssrc/share/vm/runtime/globals.hpp
DebugVtablesOpenJDK10boolruntimefalsedevelopadd debugging code to vtable dispatchsrc/share/vm/runtime/globals.hpp
DebuggingOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproductSet when executing debug methods in debug.cpp (to prevent triggering assertions)src/share/vm/runtime/globals.hpp
DeferInitialCardMarkOpenJDK10boolruntimefalsediagnosticWhen +ReduceInitialCardMarks, explicitly defer any that may arise from new_pre_store_barriersrc/share/vm/runtime/globals.hpp
DeferPollingPageLoopCountOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
intxruntime-1
range(-1, max_jint-1)
product(Unsafe,Unstable) Number of iterations in safepoint loop before changing safepoint polling page to ROsrc/share/vm/runtime/globals.hpp
DeferThrSuspendLoopCountOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
intxruntime4000
range(-1, max_jint-1)
product(Unstable) Number of times to iterate in safepoint loop before blocking VM threadssrc/share/vm/runtime/globals.hpp
DelayCompilationDuringStartupOpenJDK10boolruntimetruedevelopDelay invoking the compiler until main application class is loadedsrc/share/vm/runtime/globals.hpp
DeoptC1OpenJDK10boolc1truedevelopUse deoptimization in C1src/share/vm/c1/c1_globals.hpp
DeoptimizeALotIntervalOpenJDK10intxruntime5notproductNumber of exits until DeoptimizeALot kicks insrc/share/vm/runtime/globals.hpp
DeoptimizeALotOpenJDK10boolruntimefalsedevelopDeoptimize at every exit from the runtime systemsrc/share/vm/runtime/globals.hpp
DeoptimizeOnlyAtOpenJDK10ccstrlistruntimeA comma separated list of bcis to deoptimize atnotproductsrc/share/vm/runtime/globals.hpp
DeoptimizeRandomOpenJDK10boolruntimefalseproductDeoptimize random frames on random exit from the runtime systemsrc/share/vm/runtime/globals.hpp
DesiredMethodLimitOpenJDK10intxruntime8000developThe desired maximum method size (in bytecodes) after inliningsrc/share/vm/runtime/globals.hpp
DieOnSafepointTimeoutOpenJDK10boolruntimefalsedevelopDie upon failure to reach safepoint (see SafepointTimeout)src/share/vm/runtime/globals.hpp
DisableAttachMechanismOpenJDK10boolruntimefalseproductDisable mechanism that allows tools to attach to this VMsrc/share/vm/runtime/globals.hpp
DisableBCCheckOpenJDK10boolaarch64trueproducttell sim not to invoke bccheck callbacksrc/cpu/aarch64/vm/globals_aarch64.hpp
DisableExplicitGCOpenJDK10boolruntimefalseproductIgnore calls to System.gc()src/share/vm/runtime/globals.hpp
DisableIntrinsicOpenJDK10ccstrlistruntimedo not expand intrinsics whose (internal) names appear herediagnosticsrc/share/vm/runtime/globals.hpp
DisableStartThreadOpenJDK10boolruntimefalsedevelopDisable starting of additional Java threads (for debugging only)src/share/vm/runtime/globals.hpp
DisplayVMOutputToStderrOpenJDK10boolruntimefalseproductIf DisplayVMOutput is true, display all VM output to stderrsrc/share/vm/runtime/globals.hpp
DisplayVMOutputToStdoutOpenJDK10boolruntimefalseproductIf DisplayVMOutput is true, display all VM output to stdoutsrc/share/vm/runtime/globals.hpp
DisplayVMOutputOpenJDK10boolruntimetruediagnosticDisplay all VM output on the tty, independently of LogVMOutputsrc/share/vm/runtime/globals.hpp
DoCEEOpenJDK10boolc1truedevelopDo Conditional Expression Elimination to simplify CFGsrc/share/vm/c1/c1_globals.hpp
DoEscapeAnalysisOpenJDK10boolc2trueproductPerform escape analysissrc/share/vm/opto/c2_globals.hpp
DoReserveCopyInSuperWordOpenJDK10boolc2trueproductCreate reserve copy of graph in SuperWord.src/share/vm/opto/c2_globals.hpp
DominatorSearchLimitOpenJDK10intxc21000
range(0, max_jint)
diagnosticIterations limit in Node::dominatessrc/share/vm/opto/c2_globals.hpp
DontCompileHugeMethodsOpenJDK10boolruntimetrueproductDo not compile methods > HugeMethodLimitsrc/share/vm/runtime/globals.hpp
DontYieldALotIntervalOpenJDK10intxruntime10developInterval between which yields will be dropped (milliseconds)src/share/vm/runtime/globals.hpp
DontYieldALotOpenJDK10boolaixppcfalsedefine_pd_globalsrc/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp
DontYieldALotOpenJDK10boolbsdx86falsedefine_pd_globalsrc/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp
DontYieldALotOpenJDK10boolbsdzerofalsedefine_pd_globalsrc/os_cpu/bsd_zero/vm/globals_bsd_zero.hpp
DontYieldALotOpenJDK10boollinuxaarch64falsedefine_pd_globalsrc/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp
DontYieldALotOpenJDK10boollinuxarmfalsedefine_pd_globalsrc/os_cpu/linux_arm/vm/globals_linux_arm.hpp
DontYieldALotOpenJDK10boollinuxppcfalsedefine_pd_globalsrc/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp
DontYieldALotOpenJDK10boollinuxs390falsedefine_pd_globalsrc/os_cpu/linux_s390/vm/globals_linux_s390.hpp
DontYieldALotOpenJDK10boollinuxx86falsedefine_pd_globalsrc/os_cpu/linux_x86/vm/globals_linux_x86.hpp
DontYieldALotOpenJDK10boollinuxzerofalsedefine_pd_globalsrc/os_cpu/linux_zero/vm/globals_linux_zero.hpp
DontYieldALotOpenJDK10boolruntimeproduct_pdThrow away obvious excess yield callssrc/share/vm/runtime/globals.hpp
DontYieldALotOpenJDK10boolsparctruedefine_pd_global// yield no more than 100 times per secondsrc/cpu/sparc/vm/globals_sparc.hpp
DontYieldALotOpenJDK10boolsolarisx86truedefine_pd_global// Determined in the design centersrc/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp
DontYieldALotOpenJDK10boolwindowsx86falsedefine_pd_globalsrc/os_cpu/windows_x86/vm/globals_windows_x86.hpp
DumpLoadedClassListOpenJDK10ccstrruntimeNULLproductDump the names all loaded classes, that could be stored into the CDS archive, in the specified filesrc/share/vm/runtime/globals.hpp
DumpReplayDataOnErrorOpenJDK10boolruntimetrueproductRecord replay data for crashing compiler threadssrc/share/vm/runtime/globals.hpp
DumpSharedSpacesOpenJDK10boolruntimefalseproductSpecial mode: JVM reads a class list, loads classes, builds shared spaces, and dumps the shared spaces to a file to be used in future JVM runssrc/share/vm/runtime/globals.hpp
EagerInitializationOpenJDK10boolruntimefalsedevelopEagerly initialize classes if possiblesrc/share/vm/runtime/globals.hpp
EagerXrunInitOpenJDK10boolruntimefalseproductEagerly initialize -Xrun libraries; allows startup profiling, but not all -Xrun libraries may support the state of the VM at this timesrc/share/vm/runtime/globals.hpp
EliminateAllocationArraySizeLimitOpenJDK10intxc264
range(0, max_jint)
productArray size (number of elements) limit for scalar replacementsrc/share/vm/opto/c2_globals.hpp
EliminateAllocationsOpenJDK10boolc2trueproductUse escape analysis to eliminate allocationssrc/share/vm/opto/c2_globals.hpp
EliminateAutoBoxOpenJDK10boolc2trueproductControl optimizations for autobox eliminationsrc/share/vm/opto/c2_globals.hpp
EliminateBlocksOpenJDK10boolc1truedevelopEliminate unneccessary basic blockssrc/share/vm/c1/c1_globals.hpp
EliminateFieldAccessOpenJDK10boolc1truedevelopOptimize field loads and storessrc/share/vm/c1/c1_globals.hpp
EliminateLocksOpenJDK10boolc2trueproductCoarsen locks when possiblesrc/share/vm/opto/c2_globals.hpp
EliminateNestedLocksOpenJDK10boolc2trueproductEliminate nested locks of the same object when possiblesrc/share/vm/opto/c2_globals.hpp
EliminateNestedLocksOpenJDK10boolsharktrueproductEliminate nested locks of the same object when possiblesrc/share/vm/shark/shark_globals.hpp
EliminateNullChecksOpenJDK10boolc1truedevelopEliminate unneccessary null checkssrc/share/vm/c1/c1_globals.hpp
EmitSyncOpenJDK10Obsoleted in JDK12
Expired in JDK13
intxruntime0experimental(Unsafe, Unstable) Control emission of inline sync fast-path codesrc/share/vm/runtime/globals.hpp
EnableContendedOpenJDK10boolruntimetrueproductEnable @Contended annotation supportsrc/share/vm/runtime/globals.hpp
EnableDynamicAgentLoadingOpenJDK10boolruntimetrueproductAllow tools to load agents with the attach mechanismsrc/share/vm/runtime/globals.hpp
EnableJVMCIOpenJDK10booljvmcifalseexperimentalEnable JVMCIsrc/share/vm/jvmci/jvmci_globals.hpp
EnableTracingOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalseproductEnable event-based tracingsrc/share/vm/runtime/globals.hpp
ErgoHeapSizeLimitOpenJDK10size_truntime0
range(0, max_uintx)
productMaximum ergonomically set heap size (in bytes); zero means use MaxRAM / MaxRAMFractionsrc/share/vm/runtime/globals.hpp
ErrorFileOpenJDK10ccstrruntimeNULLproductIf an error occurs, save the error data to this file [default: ./hs_err_pid%p.log] (%p replaced with pid)src/share/vm/runtime/globals.hpp
ErrorHandlerTestOpenJDK10uintxruntime0notproductIf > 0, provokes an error after VM initialization; the value determines which error to provoke. See test_error_handler() in debug.cpp.src/share/vm/runtime/globals.hpp
ErrorLogTimeoutOpenJDK10uint64_truntime2 * 60
range(0, (uint64_t)max_jlong/1000)
productTimeout, in seconds, to limit the time spent on writing an error log in case of a crash.src/share/vm/runtime/globals.hpp
ErrorReportServerOpenJDK10Obsoleted in JDK12
Expired in JDK13
ccstrruntimeNULLproductOverride built-in error report server addresssrc/share/vm/runtime/globals.hpp
EscapeAnalysisTimeoutOpenJDK10doublec220. DEBUG_ONLY(+40.)
range(0, DBL_MAX)
productAbort EA when it reaches time limit (in sec)src/share/vm/opto/c2_globals.hpp
EstimateArgEscapeOpenJDK10boolruntimetrueproductAnalyze bytecodes to estimate escape state of argumentssrc/share/vm/runtime/globals.hpp
ExecuteInternalVMTestsOpenJDK10boolruntimefalsenotproductEnable execution of internal VM testssrc/share/vm/runtime/globals.hpp
ExecutingUnitTestsOpenJDK10boolruntimefalseproductWhether the JVM is running unit tests or notsrc/share/vm/runtime/globals.hpp
ExitEscapeAnalysisOnTimeoutOpenJDK10boolc2truedevelopExit or throw assert in EA when it reaches time limitsrc/share/vm/opto/c2_globals.hpp
ExitOnFullCodeCacheOpenJDK10boolruntimefalsenotproductExit the VM if we fill the code cachesrc/share/vm/runtime/globals.hpp
ExitOnOutOfMemoryErrorOpenJDK10boolruntimefalseproductJVM exits on the first occurrence of an out-of-memory errorsrc/share/vm/runtime/globals.hpp
ExitVMOnVerifyErrorOpenJDK10boolruntimefalsenotproductstandard exit from VM if bytecode verify error (only in debug mode)src/share/vm/runtime/globals.hpp
ExpandLoadingBaseDecode_NNOpenJDK10bools390trueproductExpand the assembler instruction required to load the base from DecodeN_NN nodes during matching.src/cpu/s390/vm/globals_s390.hpp
ExpandLoadingBaseDecodeOpenJDK10bools390trueproductExpand the assembler instruction required to load the base from DecodeN nodes during matching.src/cpu/s390/vm/globals_s390.hpp
ExpandLoadingBaseEncode_NNOpenJDK10bools390trueproductExpand the assembler instruction required to load the base from EncodeP_NN nodes during matching.src/cpu/s390/vm/globals_s390.hpp
ExpandLoadingBaseEncodeOpenJDK10bools390trueproductExpand the assembler instruction required to load the base from EncodeP nodes during matching.src/cpu/s390/vm/globals_s390.hpp
ExplicitGCInvokesConcurrentAndUnloadsClassesOpenJDK6boolruntimefalseproductA System.gc() request invokes a concurrent collection and also unloads classes during such a concurrent gc cycle (effective only when UseConcMarkSweepGC)src/share/vm/runtime/globals.hpp
ExplicitGCInvokesConcurrentOpenJDK10boolruntimefalseproductA System.gc() request invokes a concurrent collection; (effective only when using concurrent collectors)src/share/vm/runtime/globals.hpp
ExtendedDTraceProbesOpenJDK10boolruntimefalseproductEnable performance-impacting dtrace probessrc/share/vm/runtime/globals.hpp
ExtraSharedClassListFileOpenJDK10ccstrruntimeNULLproductExtra classlist for building the CDS archive filesrc/share/vm/runtime/globals.hpp
FLOATPRESSUREOpenJDK10intxaarch64c264define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
FLOATPRESSUREOpenJDK10intxarmc230define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
FLOATPRESSUREOpenJDK10intxc2develop_pdNumber of float LRG's that constitute high register pressuresrc/share/vm/opto/c2_globals.hpp
FLOATPRESSUREOpenJDK10intxppcc228define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
FLOATPRESSUREOpenJDK10intxs390c215define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
FLOATPRESSUREOpenJDK10intxsparcc252define_pd_global// C2 on V9 gets to use all the float/double registerssrc/cpu/sparc/vm/c2_globals_sparc.hpp
FLOATPRESSUREOpenJDK10intxx86c26define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
FLSAlwaysCoalesceLargeOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductCMS: larger free blocks are always available for coalescingsrc/share/vm/runtime/globals.hpp
FLSCoalescePolicyOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime2
range(0, 4)
productCMS: aggressiveness level for coalescing, increasing from 0 to 4src/share/vm/runtime/globals.hpp
FLSLargestBlockCoalesceProximityOpenJDK10Obsoleted in JDK14
Expired in JDK15
doubleruntime0.99
range(0.0, 1.0)
productCMS: the smaller the percentage the greater the coalescing forcesrc/share/vm/runtime/globals.hpp
FLSVerifyAllHeapReferencesOpenJDK10boolruntimefalsediagnosticVerify that all references across the FLS boundary are to valid objectssrc/share/vm/runtime/globals.hpp
FLSVerifyDictionaryOpenJDK10boolruntimefalsedevelopDo lots of (expensive) FLS dictionary verificationsrc/share/vm/runtime/globals.hpp
FLSVerifyIndexTableOpenJDK10boolruntimefalsediagnosticDo lots of (expensive) FLS index table verificationsrc/share/vm/runtime/globals.hpp
FLSVerifyListsOpenJDK10boolruntimefalsediagnosticDo lots of (expensive) FreeListSpace verificationsrc/share/vm/runtime/globals.hpp
FailOverToOldVerifierOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductFail over to old verifier when split verifier failssrc/share/vm/runtime/globals.hpp
FastAllocateSizeLimitOpenJDK10intxruntime128*Kdevelop/* Note: This value is zero mod 1<<13 for a cheap sparc set. */Inline allocations larger than this in doublewords must go slowsrc/share/vm/runtime/globals.hpp
FastSuperclassLimitOpenJDK10intxruntime8developDepth of hardwired instanceof accelerator arraysrc/share/vm/runtime/globals.hpp
FastTLABRefillOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
boolruntimetrueproductUse fast TLAB refill codesrc/share/vm/runtime/globals.hpp
FieldsAllocationStyleOpenJDK10Deprecated in JDK14
Obsoleted in JDK15
Expired in JDK16
intxruntime1
range(0, 2)
product0 - type based with oops first,
1 - with oops last,
2 - oops in super and sub classes are together
src/share/vm/runtime/globals.hpp
FillDelaySlotsOpenJDK10boolruntimetruedevelopFill delay slots (on SPARC only)src/share/vm/runtime/globals.hpp
FilterSpuriousWakeupsOpenJDK10boolruntimetrueproductWhen true prevents OS-level spurious, or premature, wakeups from Object.wait (Ignored for Windows)src/share/vm/runtime/globals.hpp
FoldStableValuesOpenJDK10boolruntimetruediagnosticOptimize loads from stable fields (marked w/ @Stable)src/share/vm/runtime/globals.hpp
ForceDynamicNumberOfGCThreadsOpenJDK10boolruntimefalsediagnosticForce dynamic selection of the number of parallel threads parallel gc will use to aid debuggingsrc/share/vm/runtime/globals.hpp
ForceFloatExceptionsOpenJDK10boolruntimetrueInDebugdevelopForce exceptions on FP stack under/overflowsrc/share/vm/runtime/globals.hpp
ForceNUMAOpenJDK10Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproductForce NUMA optimizations on single-node/UMA systemssrc/share/vm/runtime/globals.hpp
ForceTimeHighResolutionOpenJDK10boolruntimefalseproductUsing high time resolution (for Win32 only)src/share/vm/runtime/globals.hpp
ForceUnreachableOpenJDK10boolruntimefalsediagnosticMake all non code cache addresses to be unreachable by forcing use of 64bit literal fixupssrc/share/vm/runtime/globals.hpp
FreqCountInvocationsOpenJDK10intxc21
range(1, max_intx)
developScaling factor for branch frequencies (deprecated)src/share/vm/opto/c2_globals.hpp
FreqInlineSizeOpenJDK10intxaarch64c1325define_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
FreqInlineSizeOpenJDK10intxaarch64c2325define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
FreqInlineSizeOpenJDK10intxarmc1325define_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
FreqInlineSizeOpenJDK10intxarmc2175define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
FreqInlineSizeOpenJDK10intxruntimeproduct_pdThe maximum bytecode size of a frequent method to be inlinedsrc/share/vm/runtime/globals.hpp
FreqInlineSizeOpenJDK10intxppcc1325define_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
FreqInlineSizeOpenJDK10intxppcc2175define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
FreqInlineSizeOpenJDK10intxs390c1325define_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
FreqInlineSizeOpenJDK10intxs390c2175define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
FreqInlineSizeOpenJDK10intxsparcc1325define_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
FreqInlineSizeOpenJDK10intxsparcc2175define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
FreqInlineSizeOpenJDK10intxx86c1325define_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
FreqInlineSizeOpenJDK10intxx86c2325define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
FreqInlineSizeOpenJDK10intxzeroshark325define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
FullGCALotDummiesOpenJDK10intxruntime32*KnotproductDummy object allocated with +FullGCALot, forcing all objects to movesrc/share/vm/runtime/globals.hpp
FullGCALotIntervalOpenJDK10intxruntime1notproductInterval between which full gc will occur with +FullGCALotsrc/share/vm/runtime/globals.hpp
FullGCALotStartOpenJDK10intxruntime0notproductFor which invocation to start FullGCAlotsrc/share/vm/runtime/globals.hpp
FullGCALotOpenJDK10boolruntimefalsedevelopForce full gc at every Nth exit from the runtime system (N=FullGCALotInterval)src/share/vm/runtime/globals.hpp
G1AdaptiveIHOPNumInitialSamplesOpenJDK10size_tgc3
range(1, max_intx)
experimentalHow many completed time periods from initial mark to first mixed gc are required to use the input values for prediction of the optimal occupancy to start marking.src/share/vm/gc/g1/g1_globals.hpp
G1ConcMarkStepDurationMillisOpenJDK10doublegc10.0
range(1.0, DBL_MAX)
productTarget duration of individual concurrent marking steps in milliseconds.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRSHotCardLimitOpenJDK10uintxgc4
range(0, max_jubyte)
productThe threshold that defines (>=) a hot card.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRSLogCacheSizeOpenJDK10size_tgc10
range(0, 27)
productLog base 2 of the length of conc RS hot-card cache.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRefinementGreenZoneOpenJDK10size_tgc0
range(0, max_intx)
productThe number of update buffers that are left in the queue by the concurrent processing threads. Will be selected ergonomically by default.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRefinementRedZoneOpenJDK10size_tgc0
range(0, max_intx)
productMaximum number of enqueued update buffers before mutator threads start processing new ones instead of enqueueing them. Will be selected ergonomically by default.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRefinementServiceIntervalMillisOpenJDK10uintxgc300
range(0, max_jint)
productThe last concurrent refinement thread wakes up every specified number of milliseconds to do miscellaneous work.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRefinementThreadsOpenJDK10uintgc0
range(0, (max_jint-1)/wordSize)
productThe number of parallel rem set update threads. Will be set ergonomically by default.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRefinementThresholdStepOpenJDK10size_tgc2
range(1, SIZE_MAX)
productEach time the rset update queue increases by this amount activate the next refinement thread if available. The actual step size will be selected ergonomically by default, with this value used to determine a lower bound.src/share/vm/gc/g1/g1_globals.hpp
G1ConcRefinementYellowZoneOpenJDK10size_tgc0
range(0, max_intx)
productNumber of enqueued update buffers that will trigger concurrent processing. Will be selected ergonomically by default.src/share/vm/gc/g1/g1_globals.hpp
G1ConfidencePercentOpenJDK10uintxgc50
range(0, 100)
productConfidence level for MMU/pause predictionssrc/share/vm/gc/g1/g1_globals.hpp
G1DummyRegionsPerGCOpenJDK10uintxgc0developThe number of dummy regions G1 will allocate at the end of each evacuation pause in order to artificially fill up the heap and stress the marking implementation.src/share/vm/gc/g1/g1_globals.hpp
G1EagerReclaimHumongousObjectsWithStaleRefsOpenJDK10boolgctrueexperimentalTry to reclaim dead large objects that have a few stale references at every young GC.src/share/vm/gc/g1/g1_globals.hpp
G1EagerReclaimHumongousObjectsOpenJDK10boolgctrueexperimentalTry to reclaim dead large objects at every young GC.src/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotCountOpenJDK10uintxgc1000developNumber of successful evacuations between evacuation failures occurring at object copyingsrc/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringConcMarkOpenJDK10boolgctruedevelopForce use of evacuation failure handling during evacuation pauses when marking is in progresssrc/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringInitialMarkOpenJDK10boolgctruedevelopForce use of evacuation failure handling during initial mark evacuation pausessrc/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringMixedGCOpenJDK10boolgctruedevelopForce use of evacuation failure handling during mixed evacuation pausessrc/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringYoungGCOpenJDK10boolgctruedevelopForce use of evacuation failure handling during young evacuation pausessrc/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotIntervalOpenJDK10uintxgc5developTotal collections between forced triggering of evacuation failuressrc/share/vm/gc/g1/g1_globals.hpp
G1EvacuationFailureALotOpenJDK10boolgcfalsenotproductForce use of evacuation failure handling during certain evacuation pausessrc/share/vm/gc/g1/g1_globals.hpp
G1ExitOnExpansionFailureOpenJDK10boolgcfalsedevelopRaise a fatal VM exit out of memory failure in the event that heap expansion fails due to running out of swap.src/share/vm/gc/g1/g1_globals.hpp
G1ExpandByPercentOfAvailableOpenJDK10intxgc20
range(0, 100)
experimentalWhen expanding, % of uncommitted space to claim.src/share/vm/gc/g1/g1_globals.hpp
G1HRRSFlushLogBuffersOnVerifyOpenJDK6boolgcfalsedevelopForces flushing of log buffers before verification.src/share/vm/gc/g1/g1_globals.hpp
G1HRRSUseSparseTableOpenJDK10boolgctruedevelopWhen true, use sparse table to save space.src/share/vm/gc/g1/g1_globals.hpp
G1HeapRegionSizeOpenJDK10size_tgc0
range(0, 32*M)
productSize of the G1 regions.src/share/vm/gc/g1/g1_globals.hpp
G1HeapWastePercentOpenJDK10uintxgc5
range(0, 100)
productAmount of space, expressed as a percentage of the heap size, that G1 is willing not to collect to avoid expensive GCs.src/share/vm/gc/g1/g1_globals.hpp
G1LastPLABAverageOccupancyOpenJDK10doublegc50.0
range(0.001, 100.0)
experimentalThe expected average occupancy of the last PLAB in percent.src/share/vm/gc/g1/g1_globals.hpp
G1MarkingOverheadPercentOpenJDK6intxgc0
range(0, 100)
developOverhead of concurrent markingsrc/share/vm/gc/g1/g1_globals.hpp
G1MaxNewSizePercentOpenJDK10uintxgc60
range(0, 100)
experimentalPercentage (0-100) of the heap size to use as default maximum young gen size.src/share/vm/gc/g1/g1_globals.hpp
G1MaxVerifyFailuresOpenJDK10intxgc-1
range(-1, max_jint)
developThe maximum number of verification failures to print. -1 means print all.src/share/vm/gc/g1/g1_globals.hpp
G1MixedGCCountTargetOpenJDK10uintxgc8
range(0, max_uintx)
productThe target number of mixed GCs after a marking cycle.src/share/vm/gc/g1/g1_globals.hpp
G1MixedGCLiveThresholdPercentOpenJDK10uintxgc85
range(0, 100)
experimentalThreshold for regions to be considered for inclusion in the collection set of mixed GCs. Regions with live bytes exceeding this will not be collected.src/share/vm/gc/g1/g1_globals.hpp
G1NewSizePercentOpenJDK10uintxgc5
range(0, 100)
experimentalPercentage (0-100) of the heap size to use as default minimum young gen size.src/share/vm/gc/g1/g1_globals.hpp
G1OldCSetRegionThresholdPercentOpenJDK10uintxgc10
range(0, 100)
experimentalAn upper bound for the number of old CSet regions expressed as a percentage of the heap size.src/share/vm/gc/g1/g1_globals.hpp
G1PretouchAuxiliaryMemoryOpenJDK10boolgcfalseexperimentalPre-touch large auxiliary data structures used by the GC.src/share/vm/gc/g1/g1_globals.hpp
G1RSBarrierRegionFilterOpenJDK10boolgctruedevelopIf true, generate region filtering code in RS barriersrc/share/vm/gc/g1/g1_globals.hpp
G1RSetRegionEntriesBaseOpenJDK10intxgc256
range(1, max_jint/wordSize)
developMax number of regions in a fine-grain table per MB.src/share/vm/gc/g1/g1_globals.hpp
G1RSetRegionEntriesOpenJDK10intxgc0
range(0, max_jint/wordSize)
productMax number of regions for which we keep bitmaps.Will be set ergonomically by defaultsrc/share/vm/gc/g1/g1_globals.hpp
G1RSetScanBlockSizeOpenJDK10Deprecated in JDK14
Obsoleted in JDK15
Expired in JDK16
size_tgc64
range(1, max_uintx)
productSize of a work unit of cards claimed by a worker threadduring RSet scanning.src/share/vm/gc/g1/g1_globals.hpp
G1RSetSparseRegionEntriesBaseOpenJDK10intxgc4
range(1, max_jint/wordSize)
developMax number of entries per region in a sparse table per MB.src/share/vm/gc/g1/g1_globals.hpp
G1RSetSparseRegionEntriesOpenJDK10intxgc0
range(0, max_jint/wordSize)
productMax number of entries per region in a sparse table.Will be set ergonomically by default.src/share/vm/gc/g1/g1_globals.hpp
G1RSetUpdatingPauseTimePercentOpenJDK10intxgc10
range(0, 100)
productA target percentage of time that is allowed to be spend on process RS update buffers during the collection pause.src/share/vm/gc/g1/g1_globals.hpp
G1RefProcDrainIntervalOpenJDK10intxgc10
range(1, max_intx)
productThe number of discovered reference objects to process before draining concurrent marking work queues.src/share/vm/gc/g1/g1_globals.hpp
G1ReservePercentOpenJDK10uintxgc10
range(0, 50)
productIt determines the minimum reserve we should have in the heap to minimize the probability of promotion failure.src/share/vm/gc/g1/g1_globals.hpp
G1SATBBufferEnqueueingThresholdPercentOpenJDK10uintxgc60
range(0, 100)
productBefore enqueueing them, each mutator thread tries to do some filtering on the SATB buffers it generates. If post-filtering the percentage of retained entries is over this threshold the buffer will be enqueued for processing. A value of 0 specifies that mutator threads should not do such filtering.src/share/vm/gc/g1/g1_globals.hpp
G1SATBBufferSizeOpenJDK10size_tgc1*K
range(1, max_uintx)
productNumber of entries in an SATB log buffer.src/share/vm/gc/g1/g1_globals.hpp
G1SATBProcessCompletedThresholdOpenJDK10intxgc20
range(0, max_jint)
developNumber of completed buffers that triggers log processing.src/share/vm/gc/g1/g1_globals.hpp
G1ScrubRemSetsOpenJDK10boolgctruedevelopWhen true, do RS scrubbing after cleanup.src/share/vm/gc/g1/g1_globals.hpp
G1SecondaryFreeListAppendLengthOpenJDK10uintxgc5developThe number of regions we will add to the secondary free list at every append operationsrc/share/vm/gc/g1/g1_globals.hpp
G1StressConcRegionFreeingDelayMillisOpenJDK10uintxgc0developArtificial delay during concurrent region freeingsrc/share/vm/gc/g1/g1_globals.hpp
G1StressConcRegionFreeingOpenJDK10boolgcfalsedevelopIt stresses the concurrent region freeing operationsrc/share/vm/gc/g1/g1_globals.hpp
G1SummarizeRSetStatsPeriodOpenJDK10intxgc0
range(0, max_intx)
diagnosticThe period (in number of GCs) at which we will generate update buffer processing info (0 means do not periodically generate this info); it also requires that logging is enabled on the tracelevel for gc+remsetsrc/share/vm/gc/g1/g1_globals.hpp
G1UpdateBufferSizeOpenJDK10size_tgc256
range(1, NOT_LP64(32*M) LP64_ONLY(1*G))
productSize of an update buffersrc/share/vm/gc/g1/g1_globals.hpp
G1UseAdaptiveConcRefinementOpenJDK10boolgctrueproductSelect green, yellow and red zones adaptively to meet the the pause requirements.src/share/vm/gc/g1/g1_globals.hpp
G1UseAdaptiveIHOPOpenJDK10boolgctrueproductAdaptively adjust the initiating heap occupancy from the initial value of InitiatingHeapOccupancyPercent. The policy attempts to start marking in time based on application behavior.src/share/vm/gc/g1/g1_globals.hpp
G1VerifyBitmapsOpenJDK10boolgcfalsedevelopVerifies the consistency of the marking bitmapssrc/share/vm/gc/g1/g1_globals.hpp
G1VerifyCTCleanupOpenJDK10boolgcfalsedevelopVerify card table cleanup.src/share/vm/gc/g1/g1_globals.hpp
G1VerifyHeapRegionCodeRootsOpenJDK10boolgcfalsediagnosticVerify the code root lists attached to each heap region.src/share/vm/gc/g1/g1_globals.hpp
G1VerifyRSetsDuringFullGCOpenJDK10boolgcfalsediagnosticIf true, perform verification of each heap region's remembered set when verifying the heap during a full GC.src/share/vm/gc/g1/g1_globals.hpp
GCALotAtAllSafepointsOpenJDK10boolruntimefalsenotproductEnforce ScavengeALot/GCALot at all potential safepointssrc/share/vm/runtime/globals.hpp
GCDrainStackTargetSizeOpenJDK10uintxruntime64
range(0, max_juint)
productNumber of entries we will try to leave on the stack during parallel gcsrc/share/vm/runtime/globals.hpp
GCExpandToAllocateDelayMillisOpenJDK10uintxruntime0developDelay between expansion and allocation (in milliseconds)src/share/vm/runtime/globals.hpp
GCHeapFreeLimitOpenJDK10uintxruntime2
range(0, 100)
productMinimum percentage of free space after a full GC before an OutOfMemoryError is thrown (used with GCTimeLimit)src/share/vm/runtime/globals.hpp
GCLockerEdenExpansionPercentOpenJDK10uintxruntime5
range(0, 100)
productHow much the GC can expand the eden by while the GC locker is active (as a percentage)src/share/vm/runtime/globals.hpp
GCLockerInvokesConcurrentOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductThe exit of a JNI critical section necessitating a scavenge, also kicks off a background concurrent collectionsrc/share/vm/runtime/globals.hpp
GCLockerRetryAllocationCountOpenJDK10uintxruntime2
range(0, max_uintx)
diagnosticNumber of times to retry allocations when blocked by the GC lockersrc/share/vm/runtime/globals.hpp
GCParallelVerificationEnabledOpenJDK10boolruntimetruediagnosticEnable parallel memory system verificationsrc/share/vm/runtime/globals.hpp
GCPauseIntervalMillisOpenJDK10uintxruntime0productTime slice for MMU specificationsrc/share/vm/runtime/globals.hpp
GCTaskTimeStampEntriesOpenJDK10Obsoleted in JDK14
Expired in JDK16
uintruntime200
range(1, max_jint)
productNumber of time stamp entries per gc worker threadsrc/share/vm/runtime/globals.hpp
GCTimeLimitOpenJDK10uintxruntime98
range(0, 100)
productLimit of the proportion of time spent in GC before an OutOfMemoryError is thrown (used with GCHeapFreeLimit)src/share/vm/runtime/globals.hpp
GCTimeRatioOpenJDK10uintxruntime99
range(0, max_juint)
productAdaptive size policy application time to GC time ratiosrc/share/vm/runtime/globals.hpp
GCWorkerDelayMillisOpenJDK10uintxruntime0developDelay in scheduling GC workers (in milliseconds)src/share/vm/runtime/globals.hpp
GenerateArrayStoreCheckOpenJDK10boolc1truedevelopGenerates code for array store checkssrc/share/vm/c1/c1_globals.hpp
GenerateRangeChecksOpenJDK10boolruntimetruedevelopGenerate range checks for array accessessrc/share/vm/runtime/globals.hpp
GenerateSynchronizationCodeOpenJDK10boolruntimetruedevelopgenerate locking/unlocking code for synchronized methods and monitorssrc/share/vm/runtime/globals.hpp
GuaranteedSafepointIntervalOpenJDK10intxruntime1000
range(0, max_jint)
diagnosticGuarantee a safepoint (at least) every so many milliseconds (0 means none)src/share/vm/runtime/globals.hpp
HeapBaseMinAddressOpenJDK10size_taixppc2*Gdefine_pd_globalsrc/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp
HeapBaseMinAddressOpenJDK10size_tbsdx862*Gdefine_pd_globalsrc/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp
HeapBaseMinAddressOpenJDK10size_tbsdzero2*Gdefine_pd_globalsrc/os_cpu/bsd_zero/vm/globals_bsd_zero.hpp
HeapBaseMinAddressOpenJDK10uintxlinuxaarch642*Gdefine_pd_globalsrc/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp
HeapBaseMinAddressOpenJDK10size_tlinuxarm2*Gdefine_pd_globalsrc/os_cpu/linux_arm/vm/globals_linux_arm.hpp
HeapBaseMinAddressOpenJDK10size_tlinuxppc2*Gdefine_pd_globalsrc/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp
HeapBaseMinAddressOpenJDK10size_tlinuxs3902*Gdefine_pd_globalsrc/os_cpu/linux_s390/vm/globals_linux_s390.hpp
HeapBaseMinAddressOpenJDK10size_tlinuxsparcCONST64(4)*Gdefine_pd_globalsrc/os_cpu/linux_sparc/vm/globals_linux_sparc.hpp
HeapBaseMinAddressOpenJDK10size_tlinuxx862*Gdefine_pd_globalsrc/os_cpu/linux_x86/vm/globals_linux_x86.hpp
HeapBaseMinAddressOpenJDK10size_tlinuxzero2*Gdefine_pd_globalsrc/os_cpu/linux_zero/vm/globals_linux_zero.hpp
HeapBaseMinAddressOpenJDK10size_truntimeproduct_pdOS specific low limit for heap base addresssrc/share/vm/runtime/globals.hpp
HeapBaseMinAddressOpenJDK10size_tsolarissparc2*Gdefine_pd_globalsrc/os_cpu/solaris_sparc/vm/globals_solaris_sparc.hpp
HeapBaseMinAddressOpenJDK10size_tsolarisx862*Gdefine_pd_globalsrc/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp
HeapBaseMinAddressOpenJDK10size_twindowsx862*Gdefine_pd_globalsrc/os_cpu/windows_x86/vm/globals_windows_x86.hpp
HeapDumpAfterFullGCOpenJDK10boolruntimefalsemanageableDump heap to file after any major stop-the-world GCsrc/share/vm/runtime/globals.hpp
HeapDumpBeforeFullGCOpenJDK10boolruntimefalsemanageableDump heap to file before any major stop-the-world GCsrc/share/vm/runtime/globals.hpp
HeapDumpOnOutOfMemoryErrorOpenJDK10boolruntimefalsemanageableDump heap to file when java.lang.OutOfMemoryError is thrownsrc/share/vm/runtime/globals.hpp
HeapDumpPathOpenJDK10ccstrruntimeNULLmanageableWhen HeapDumpOnOutOfMemoryError is on, the path (filename or directory) of the dump file (defaults to java_pid<pid>.hprof in the working directory)src/share/vm/runtime/globals.hpp
HeapFirstMaximumCompactionCountOpenJDK10uintxruntime3
range(0, max_uintx)
productThe collection count for the first maximum compactionsrc/share/vm/runtime/globals.hpp
HeapMaximumCompactionIntervalOpenJDK10uintxruntime20
range(0, max_uintx)
productHow often should we maximally compact the heap (not allowing any dead space)src/share/vm/runtime/globals.hpp
HeapSearchStepsOpenJDK10uintxruntime3 PPC64_ONLY(+17)
range(1, max_uintx)
productHeap allocation steps through preferred address regions to find where it can allocate the heap. Number of steps to take per region.src/share/vm/runtime/globals.hpp
HeapSizePerGCThreadOpenJDK10size_truntimeScaleForWordSize(64*M)
range((size_t)os::vm_page_size(), (size_t)max_uintx)
productSize of heap (bytes) per GC thread used in calculating the number of GC threadssrc/share/vm/runtime/globals.hpp
HotCallCountThresholdOpenJDK10intxc2999999
range(0, max_intx)
developlarge numbers of calls (per method invocation) force hotnesssrc/share/vm/opto/c2_globals.hpp
HotCallProfitThresholdOpenJDK10intxc2999999
range(0, max_intx)
develophighly profitable inlining opportunities force hotnesssrc/share/vm/opto/c2_globals.hpp
HotCallTrivialSizeOpenJDK10intxc2-1
range(-1, max_intx)
developtrivial methods (no larger than this) force calls to be hotsrc/share/vm/opto/c2_globals.hpp
HotCallTrivialWorkOpenJDK10intxc2-1
range(-1, max_intx)
developtrivial execution time (no larger than this) forces hotnesssrc/share/vm/opto/c2_globals.hpp
HotMethodDetectionLimitOpenJDK10intxruntime100000
range(1, max_jint)
diagnosticNumber of compiled code invocations after which the method is considered as hot by the flushersrc/share/vm/runtime/globals.hpp
HugeMethodLimitOpenJDK10intxruntime8000developDon't compile methods larger than this if +DontCompileHugeMethodssrc/share/vm/runtime/globals.hpp
ICMissHistogramOpenJDK10boolruntimefalsenotproductProduce histogram of IC missessrc/share/vm/runtime/globals.hpp
IEEEPrecisionOpenJDK10boolx86truedevelopEnables IEEE precision (for INTEL only)src/cpu/x86/vm/globals_x86.hpp
INTPRESSUREOpenJDK10intxaarch64c224define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
INTPRESSUREOpenJDK10intxarmc212define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
INTPRESSUREOpenJDK10intxc2develop_pdNumber of integer LRG's that constitute high register pressuresrc/share/vm/opto/c2_globals.hpp
INTPRESSUREOpenJDK10intxppcc226define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
INTPRESSUREOpenJDK10intxs390c210define_pd_global// Medium size register set, 6 special purpose regs, 3 SOE regs.src/cpu/s390/vm/c2_globals_s390.hpp
INTPRESSUREOpenJDK10intxsparcc248define_pd_global// large register setsrc/cpu/sparc/vm/c2_globals_sparc.hpp
INTPRESSUREOpenJDK10intxx86c26define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
IdealizeClearArrayNodeOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
IdealizeClearArrayNodeOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
IdealizeClearArrayNodeOpenJDK10boolc2diagnostic_pdReplace ClearArrayNode by subgraph of basic operations.src/share/vm/opto/c2_globals.hpp
IdealizeClearArrayNodeOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
IdealizeClearArrayNodeOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
IdealizeClearArrayNodeOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
IdealizeClearArrayNodeOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
IdealizedNumericsOpenJDK10boolc2falsedevelopCheck performance difference allowing FP associativity and commutativity...src/share/vm/opto/c2_globals.hpp
IgnoreEmptyClassPathsOpenJDK10boolruntimefalseproductIgnore empty path elements in -classpathsrc/share/vm/runtime/globals.hpp
IgnoreLibthreadGPFaultOpenJDK10boolruntimefalsedevelopSuppress workaround for libthread GP faultsrc/share/vm/runtime/globals.hpp
IgnoreLockingAssertionsOpenJDK10boolruntimefalsenotproductdisable locking assertions (for speed)src/share/vm/runtime/globals.hpp
IgnoreRewritesOpenJDK10boolruntimefalsedevelopSuppress rewrites of bytecodes in the oopmap generator. This is unsafe!src/share/vm/runtime/globals.hpp
IgnoreUnrecognizedVMOptionsOpenJDK10boolruntimefalseproductIgnore unrecognized VM optionssrc/share/vm/runtime/globals.hpp
IgnoreUnverifiableClassesDuringDumpOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
Expired in JDK13
boolruntimefalsediagnosticDo not quit -Xshare:dump even if we encounter unverifiable classes. Just exclude them from the shared dictionary.src/share/vm/runtime/globals.hpp
ImplicitDiv0ChecksOpenJDK10boolc1truedevelopUse implicit division by zero checkssrc/share/vm/c1/c1_globals.hpp
ImplicitNullCheckThresholdOpenJDK10intxc23
range(0, max_jint)
developDon't do implicit null checks if NPE's in a method exceeds limitsrc/share/vm/opto/c2_globals.hpp
ImplicitNullChecksOpenJDK10boolaarch64truedefine_pd_global// Generate code for implicit null checkssrc/cpu/aarch64/vm/globals_aarch64.hpp
ImplicitNullChecksOpenJDK10boolarmtruedefine_pd_global// Generate code for implicit null checkssrc/cpu/arm/vm/globals_arm.hpp
ImplicitNullChecksOpenJDK10boolruntimediagnostic_pdGenerate code for implicit null checkssrc/share/vm/runtime/globals.hpp
ImplicitNullChecksOpenJDK10boolppctruedefine_pd_global// Generate code for implicit null checks.src/cpu/ppc/vm/globals_ppc.hpp
ImplicitNullChecksOpenJDK10bools390truedefine_pd_global// Generate code for implicit null checks.src/cpu/s390/vm/globals_s390.hpp
ImplicitNullChecksOpenJDK10boolsparctruedefine_pd_global// Generate code for implicit null checkssrc/cpu/sparc/vm/globals_sparc.hpp
ImplicitNullChecksOpenJDK10boolx86truedefine_pd_global// Generate code for implicit null checkssrc/cpu/x86/vm/globals_x86.hpp
ImplicitNullChecksOpenJDK10boolzerotruedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
IncreaseFirstTierCompileThresholdAtOpenJDK10uintxruntime50
range(0, 99)
productIncrease the compile threshold for C1 compilation if the code cache is filled by the specified percentagesrc/share/vm/runtime/globals.hpp
IncrementalInlineOpenJDK10boolc2trueproductdo post parse inliningsrc/share/vm/opto/c2_globals.hpp
IndexSetWatchOpenJDK10intxc20
range(-1, 0)
notproductTrace all operations on this IndexSet (-1 means all, 0 none)src/share/vm/opto/c2_globals.hpp
InitArrayShortSizeOpenJDK10intxaarch64BytesPerLongdefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
InitArrayShortSizeOpenJDK10intxarm8*BytesPerLongdefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
InitArrayShortSizeOpenJDK10intxruntimediagnostic_pdThreshold small size (in bytes) for clearing arrays. Anything this size or smaller may get converted to discrete scalar stores.src/share/vm/runtime/globals.hpp
InitArrayShortSizeOpenJDK10intxppc9*BytesPerLongdefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
InitArrayShortSizeOpenJDK10intxs3901*BytesPerLongdefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
InitArrayShortSizeOpenJDK10intxsparc8*BytesPerLongdefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
InitArrayShortSizeOpenJDK10intxx868*BytesPerLongdefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
InitArrayShortSizeOpenJDK10intxzero0define_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
InitialBootClassLoaderMetaspaceSizeOpenJDK10Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
size_truntimeNOT_LP64(2200*K) LP64_ONLY(4*M)
range(30*K, max_uintx/BytesPerWord)
productInitial size of the boot class loader data metaspacesrc/share/vm/runtime/globals.hpp
InitialCodeCacheSizeOpenJDK10intxaarch64c1160*Kdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
InitialCodeCacheSizeOpenJDK10intxaarch64c22496*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizesrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
InitialCodeCacheSizeOpenJDK10size_tarmc1160*Kdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
InitialCodeCacheSizeOpenJDK10size_tarmc21536*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizesrc/cpu/arm/vm/c2_globals_arm.hpp
InitialCodeCacheSizeOpenJDK10uintxruntimeproduct_pdInitial code cache size (in bytes)src/share/vm/runtime/globals.hpp
InitialCodeCacheSizeOpenJDK10intxppcc1160*Kdefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
InitialCodeCacheSizeOpenJDK10intxppcc22048*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizesrc/cpu/ppc/vm/c2_globals_ppc.hpp
InitialCodeCacheSizeOpenJDK10uintxs390c1160*Kdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
InitialCodeCacheSizeOpenJDK10uintxs390c22048*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizesrc/cpu/s390/vm/c2_globals_s390.hpp
InitialCodeCacheSizeOpenJDK10intxsparcc1160*Kdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
InitialCodeCacheSizeOpenJDK10intxsparcc21536*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizesrc/cpu/sparc/vm/c2_globals_sparc.hpp
InitialCodeCacheSizeOpenJDK10intxx86c1160*Kdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
InitialCodeCacheSizeOpenJDK10intxx86c22304*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizesrc/cpu/x86/vm/c2_globals_x86.hpp
InitialCodeCacheSizeOpenJDK10intxzeroshark160*Kdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
InitialHeapSizeOpenJDK10size_truntime0productInitial heap size (in bytes); zero means use ergonomicssrc/share/vm/runtime/globals.hpp
InitialRAMFractionOpenJDK10Deprecated in JDK10uintxruntime64
range(1, max_uintx)
productFraction (1/n) of real memory used for initial heap sizesrc/share/vm/runtime/globals.hpp
InitialSurvivorRatioOpenJDK10uintxruntime8
range(0, max_uintx)
productInitial ratio of young generation/survivor space sizesrc/share/vm/runtime/globals.hpp
InitialTenuringThresholdOpenJDK10uintxruntime7
range(0, markOopDesc::max_age + 1)
productInitial value for tenuring thresholdsrc/share/vm/runtime/globals.hpp
InitiatingHeapOccupancyPercentOpenJDK10uintxruntime45
range(0, 100)
productThe percent occupancy (IHOP) of the current old generation capacity above which a concurrent mark cycle will be initiated Its value may change over time if adaptive IHOP is enabled, otherwise the value remains constant. In the latter case a value of 0 will result as frequent as possible concurrent marking cycles. A value of 100 disables concurrent marking. Fragmentation waste in the old generation is not considered free space in this calculation. (G1 collector only)src/share/vm/runtime/globals.hpp
InjectGCWorkerCreationFailureOpenJDK10boolruntimefalsediagnosticInject thread creation failures for UseDynamicNumberOfGCThreadssrc/share/vm/runtime/globals.hpp
InlineAccessorsOpenJDK10boolc2truedevelopinline accessor methods (get/set)src/share/vm/opto/c2_globals.hpp
InlineArrayCopyOpenJDK10boolruntimetruediagnosticInline arraycopy native that is known to be part of base library DLLsrc/share/vm/runtime/globals.hpp
InlineClassNativesOpenJDK10boolruntimetruediagnosticInline Class.isInstance, etcsrc/share/vm/runtime/globals.hpp
InlineDataFileOpenJDK10ccstrruntimeNULLproductFile containing inlining replay information[default: ./inline_pid%p.log] (%p replaced with pid)src/share/vm/runtime/globals.hpp
InlineFrequencyCountOpenJDK10intxaarch64100define_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
InlineFrequencyCountOpenJDK10intxarm50define_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
InlineFrequencyCountOpenJDK10intxruntimediagnostic_pdCount of call site execution necessary to trigger frequent inliningsrc/share/vm/runtime/globals.hpp
InlineFrequencyCountOpenJDK10intxppc100define_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
InlineFrequencyCountOpenJDK10intxs390100define_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
InlineFrequencyCountOpenJDK10intxsparc50define_pd_global// we can use more inlining on the SPARCsrc/cpu/sparc/vm/globals_sparc.hpp
InlineFrequencyCountOpenJDK10intxx86100define_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
InlineFrequencyCountOpenJDK10intxzero100define_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
InlineFrequencyRatioOpenJDK10intxruntime20
range(0, max_jint)
developRatio of call site execution to caller method invocationsrc/share/vm/runtime/globals.hpp
InlineIntrinsicsOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
InlineIntrinsicsOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
InlineIntrinsicsOpenJDK10boolarmc1falsedefine_pd_global// TODO: ARMsrc/cpu/arm/vm/c1_globals_arm.hpp
InlineIntrinsicsOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
InlineIntrinsicsOpenJDK10boolruntimedevelop_pdInline intrinsics that can be statically resolvedsrc/share/vm/runtime/globals.hpp
InlineIntrinsicsOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
InlineIntrinsicsOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
InlineIntrinsicsOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
InlineIntrinsicsOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
InlineIntrinsicsOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
InlineIntrinsicsOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
InlineIntrinsicsOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
InlineIntrinsicsOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
InlineIntrinsicsOpenJDK10boolzerosharkfalsedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
InlineMathNativesOpenJDK10boolruntimetruediagnosticInline SinD, CosD, etc.src/share/vm/runtime/globals.hpp
InlineMethodsWithExceptionHandlersOpenJDK10boolc1truedevelopInline methods containing exception handlers (NOTE: does not work with current backend)src/share/vm/c1/c1_globals.hpp
InlineNIOCheckIndexOpenJDK10boolc1truediagnosticIntrinsify java.nio.Buffer.checkIndexsrc/share/vm/c1/c1_globals.hpp
InlineNativesOpenJDK10boolruntimetruediagnosticInline natives that are known to be part of base library DLLsrc/share/vm/runtime/globals.hpp
InlineNotifyOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimetruediagnosticintrinsify subset of notifysrc/share/vm/runtime/globals.hpp
InlineObjectCopyOpenJDK10boolc2truediagnosticinline Object.clone and Arrays.copyOf[Range] intrinsicssrc/share/vm/opto/c2_globals.hpp
InlineObjectHashOpenJDK10boolruntimetruediagnosticInline Object::hashCode() native that is known to be part of base library DLLsrc/share/vm/runtime/globals.hpp
InlineReflectionGetCallerClassOpenJDK10boolc2truediagnosticinline sun.reflect.Reflection.getCallerClass(), known to be part of base library DLLsrc/share/vm/opto/c2_globals.hpp
InlineSmallCodeOpenJDK10intxaarch641000define_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
InlineSmallCodeOpenJDK10intxarm1500define_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
InlineSmallCodeOpenJDK10intxruntimeproduct_pdOnly inline already compiled methods if their code size is less than thissrc/share/vm/runtime/globals.hpp
InlineSmallCodeOpenJDK10intxppc1500define_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
InlineSmallCodeOpenJDK10intxs3902000define_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
InlineSmallCodeOpenJDK10intxsparc1500define_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
InlineSmallCodeOpenJDK10intxx861000define_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
InlineSmallCodeOpenJDK10intxzero1000define_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
InlineSynchronizedMethodsOpenJDK10boolc1trueproductInline synchronized methodssrc/share/vm/c1/c1_globals.hpp
InlineThreadNativesOpenJDK10boolruntimetruediagnosticInline Thread.currentThread, etcsrc/share/vm/runtime/globals.hpp
InlineThrowCountOpenJDK10intxruntime50
range(0, max_jint)
developForce inlining of interpreted methods that throw this oftensrc/share/vm/runtime/globals.hpp
InlineThrowMaxSizeOpenJDK10intxruntime200
range(0, max_jint)
developForce inlining of throwing methods smaller than thissrc/share/vm/runtime/globals.hpp
InlineUnsafeOpsOpenJDK10boolruntimetruediagnosticInline memory ops (native methods) from Unsafesrc/share/vm/runtime/globals.hpp
InlineWarmCallsOpenJDK10boolc2falsedevelopUse a heat-based priority queue to govern inliningsrc/share/vm/opto/c2_globals.hpp
InlineOpenJDK10boolruntimetrueproductEnable inliningsrc/share/vm/runtime/globals.hpp
InsertEndGroupPPC64OpenJDK10boolppcfalseproductInsert EndGroup instructions to optimize for Power6.src/cpu/ppc/vm/globals_ppc.hpp
InsertMemBarAfterArraycopyOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolc2trueproductInsert memory barrier after arraycopy callsrc/share/vm/opto/c2_globals.hpp
InstallMethodsOpenJDK10boolc1truedevelopInstall methods at the end of successful compilationssrc/share/vm/c1/c1_globals.hpp
InstructionCountCutoffOpenJDK10intxc137000
range(0, max_jint)
developIf GraphBuilder adds this many instructions, bails outsrc/share/vm/c1/c1_globals.hpp
InterceptOSExceptionOpenJDK10boolruntimefalsedevelopStart debugger when an implicit OS (e.g. NULL) exception happenssrc/share/vm/runtime/globals.hpp
InteriorEntryAlignmentOpenJDK10intxaarch64c216define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
InteriorEntryAlignmentOpenJDK10intxarmc216define_pd_global// = CodeEntryAlignmentsrc/cpu/arm/vm/c2_globals_arm.hpp
InteriorEntryAlignmentOpenJDK10intxc2product_pdCode alignment for interior entry points in generated code (in bytes)src/share/vm/opto/c2_globals.hpp
InteriorEntryAlignmentOpenJDK10intxppcc216define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
InteriorEntryAlignmentOpenJDK10intxs390c22define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
InteriorEntryAlignmentOpenJDK10intxsparcc216define_pd_global// = CodeEntryAlignmentsrc/cpu/sparc/vm/c2_globals_sparc.hpp
InteriorEntryAlignmentOpenJDK10intxx86c24define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
InterpreterProfilePercentageOpenJDK10intxruntime33
range(0, 100)
productNON_TIERED number of method invocations/branches (expressed as % of CompileThreshold) before profiling in the interpretersrc/share/vm/runtime/globals.hpp
JVMCICounterSizeOpenJDK10intxjvmci0
range(0, max_jint)
experimentalReserved size for benchmark counterssrc/share/vm/jvmci/jvmci_globals.hpp
JVMCICountersExcludeCompilerOpenJDK10booljvmcitrueexperimentalExclude JVMCI compiler threads from benchmark counterssrc/share/vm/jvmci/jvmci_globals.hpp
JVMCIHostThreadsOpenJDK10intxjvmci1
range(1, max_jint)
experimentalForce number of compiler threads for JVMCI host compilersrc/share/vm/jvmci/jvmci_globals.hpp
JVMCINMethodSizeLimitOpenJDK10intxjvmci(80*K)*wordSizeexperimentalMaximum size of a compiled method.src/share/vm/jvmci/jvmci_globals.hpp
JVMCIPrintPropertiesOpenJDK10booljvmcifalseexperimentalPrints properties used by the JVMCI compiler and exitssrc/share/vm/jvmci/jvmci_globals.hpp
JVMCIThreadsOpenJDK10intxjvmci1
range(1, max_jint)
experimentalForce number of JVMCI compiler threads to usesrc/share/vm/jvmci/jvmci_globals.hpp
JVMCITraceLevelOpenJDK10intxjvmci0experimentalTrace level for JVMCI:
1 means emit a message for each CompilerToVM call,levels greater than 1 provide progressively greater detail
src/share/vm/jvmci/jvmci_globals.hpp
JVMCIUseFastLockingOpenJDK10booljvmcitruedevelopUse fast inlined locking codesrc/share/vm/jvmci/jvmci_globals.hpp
JVMInvokeMethodSlackOpenJDK10size_taixppc8192define_pd_globalsrc/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp
JVMInvokeMethodSlackOpenJDK10size_tbsdx868192define_pd_globalsrc/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp
JVMInvokeMethodSlackOpenJDK10size_tbsdzero8192define_pd_globalsrc/os_cpu/bsd_zero/vm/globals_bsd_zero.hpp
JVMInvokeMethodSlackOpenJDK10uintxlinuxaarch648192define_pd_globalsrc/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp
JVMInvokeMethodSlackOpenJDK10size_tlinuxarm8192define_pd_globalsrc/os_cpu/linux_arm/vm/globals_linux_arm.hpp
JVMInvokeMethodSlackOpenJDK10size_tlinuxppc8192define_pd_globalsrc/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp
JVMInvokeMethodSlackOpenJDK10size_tlinuxs3908192define_pd_globalsrc/os_cpu/linux_s390/vm/globals_linux_s390.hpp
JVMInvokeMethodSlackOpenJDK10size_tlinuxsparc12288define_pd_globalsrc/os_cpu/linux_sparc/vm/globals_linux_sparc.hpp
JVMInvokeMethodSlackOpenJDK10size_tlinuxx868192define_pd_globalsrc/os_cpu/linux_x86/vm/globals_linux_x86.hpp
JVMInvokeMethodSlackOpenJDK10size_tlinuxzero8192define_pd_globalsrc/os_cpu/linux_zero/vm/globals_linux_zero.hpp
JVMInvokeMethodSlackOpenJDK10size_truntimedevelop_pdStack space (bytes) required for JVM_InvokeMethod to completesrc/share/vm/runtime/globals.hpp
JVMInvokeMethodSlackOpenJDK10size_tsolarissparc12288define_pd_globalsrc/os_cpu/solaris_sparc/vm/globals_solaris_sparc.hpp
JVMInvokeMethodSlackOpenJDK10size_tsolarisx8610*Kdefine_pd_globalsrc/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp
JVMInvokeMethodSlackOpenJDK10size_twindowsx868192define_pd_globalsrc/os_cpu/windows_x86/vm/globals_windows_x86.hpp
JavaMonitorsInStackTraceOpenJDK10boolruntimetrueproductPrint information about Java monitor locks when the stacks aredumpedsrc/share/vm/runtime/globals.hpp
JavaPriority10_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority1_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority2_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority3_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority4_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority5_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority6_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority7_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority8_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
JavaPriority9_To_OSPriorityOpenJDK10intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiessrc/share/vm/runtime/globals.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolc1product_pdfill delays on on SPARC with LIRsrc/share/vm/c1/c1_globals.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
LIRFillDelaySlotsOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
LIRTraceExecutionOpenJDK10boolc1falsedevelopadd LIR code which logs the execution of blockssrc/share/vm/c1/c1_globals.hpp
LIRTracePeepholeOpenJDK10boolc1falsedevelopTrace peephole optimizersrc/share/vm/c1/c1_globals.hpp
LargePageHeapSizeThresholdOpenJDK10size_truntime128*M
range(0, max_uintx)
productUse large pages if maximum heap is at least this bigsrc/share/vm/runtime/globals.hpp
LargePageSizeInBytesOpenJDK10size_truntime0
range(0, max_uintx)
productLarge page size (0 to let VM choose the page size)src/share/vm/runtime/globals.hpp
LargePagesIndividualAllocationInjectErrorOpenJDK10boolruntimefalsedevelopFail large pages individual allocationsrc/share/vm/runtime/globals.hpp
LiveNodeCountInliningCutoffOpenJDK10intxc240000
range(0, max_juint / 8)
productmax number of live nodes in a methodsrc/share/vm/opto/c2_globals.hpp
LoadExecStackDllInVMThreadOpenJDK10boollinuxtrueproductLoad DLLs with executable-stack attribute in the VM Threadsrc/os/linux/vm/globals_linux.hpp
LoadLineNumberTablesOpenJDK10boolruntimetruedevelopTell whether the class file parser loads line number tablessrc/share/vm/runtime/globals.hpp
LoadLocalVariableTablesOpenJDK10boolruntimetruedevelopTell whether the class file parser loads local variable tablessrc/share/vm/runtime/globals.hpp
LoadLocalVariableTypeTablesOpenJDK10boolruntimetruedevelopTell whether the class file parser loads local variable typetablessrc/share/vm/runtime/globals.hpp
LoadPollAddressFromThreadOpenJDK7boolppcfalseproductLoad polling page address from thread object (required for per-thread safepoints on platforms != IA64)src/cpu/ppc/vm/globals_ppc.hpp
LogCompilationOpenJDK10boolruntimefalsediagnosticLog compilation activity in detail to LogFilesrc/share/vm/runtime/globals.hpp
LogEventsBufferEntriesOpenJDK10uintxruntime10
range(1, NOT_LP64(1*K) LP64_ONLY(1*M))
diagnosticNumber of ring buffer event logssrc/share/vm/runtime/globals.hpp
LogEventsOpenJDK10boolruntimetruediagnosticEnable the various ring buffer event logssrc/share/vm/runtime/globals.hpp
LogFileOpenJDK10ccstrruntimeNULLdiagnosticIf LogVMOutput or LogCompilation is on, save VM output to this file [default: ./hotspot_pid%p.log] (%p replaced with pid)src/share/vm/runtime/globals.hpp
LogSweeperOpenJDK10boolruntimefalsenotproductKeep a ring buffer of sweeper activitysrc/share/vm/runtime/globals.hpp
LogTouchedMethodsOpenJDK10boolruntimefalsediagnosticLog methods which have been ever touched in runtimesrc/share/vm/runtime/globals.hpp
LogVMOutputOpenJDK10boolruntimefalsediagnosticSave VM output to LogFilesrc/share/vm/runtime/globals.hpp
LongCompileThresholdOpenJDK10intxruntime50developUsed with +TraceLongCompilessrc/share/vm/runtime/globals.hpp
LoopMaxUnrollOpenJDK10intxc216
range(0, max_jint)
productMaximum number of unrolls for main loopsrc/share/vm/opto/c2_globals.hpp
LoopOptsCountOpenJDK10intxc243
range(5, 43)
productSet level of loop optimization for tier 1 compilessrc/share/vm/opto/c2_globals.hpp
LoopPercentProfileLimitOpenJDK10intxaarch64c210define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
LoopPercentProfileLimitOpenJDK10intxarmc210define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
LoopPercentProfileLimitOpenJDK10intxc2product_pdUnroll loop bodies with % node count of profile limitsrc/share/vm/opto/c2_globals.hpp
LoopPercentProfileLimitOpenJDK10intxppcc210define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
LoopPercentProfileLimitOpenJDK10intxs390c210define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
LoopPercentProfileLimitOpenJDK10intxsparcc210define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
LoopPercentProfileLimitOpenJDK10intxx86c230define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
LoopUnrollLimitOpenJDK10intxaarch64c260define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
LoopUnrollLimitOpenJDK10intxarmc260define_pd_global// Design center runs on 1.3.1src/cpu/arm/vm/c2_globals_arm.hpp
LoopUnrollLimitOpenJDK10intxc2product_pdUnroll loop bodies with node count less than thissrc/share/vm/opto/c2_globals.hpp
LoopUnrollLimitOpenJDK10intxppcc260define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
LoopUnrollLimitOpenJDK10intxs390c260define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
LoopUnrollLimitOpenJDK10intxsparcc260define_pd_global// Design center runs on 1.3.1src/cpu/sparc/vm/c2_globals_sparc.hpp
LoopUnrollLimitOpenJDK10intxx86c250define_pd_global// Design center runs on 1.3.1src/cpu/x86/vm/c2_globals_x86.hpp
LoopUnrollMinOpenJDK10intxc24
range(0, max_jint)
productMinimum number of unroll loop bodies before checking progressof rounds of unroll,optimize,..src/share/vm/opto/c2_globals.hpp
LoopUnswitchingOpenJDK10boolc2trueproductEnable loop unswitching (a form of invariant test hoisting)src/share/vm/opto/c2_globals.hpp
MVCLEThresholdOpenJDK10size_ts390+2*(4*K)productThreshold above which page-aligned MVCLE copy/init is used.src/cpu/s390/vm/globals_s390.hpp
MallocCatchPtrOpenJDK10intxruntime-1developHit breakpoint when mallocing/freeing this pointersrc/share/vm/runtime/globals.hpp
MallocMaxTestWordsOpenJDK10uintxruntime0
range(0, max_uintx)
diagnosticIf non-zero, maximum number of words that malloc/realloc can allocate (for testing only)src/share/vm/runtime/globals.hpp
ManagementServerOpenJDK10boolruntimefalseproductCreate JMX Management Serversrc/share/vm/runtime/globals.hpp
MarkStackSizeMaxOpenJDK10size_truntimeNOT_LP64(4*M) LP64_ONLY(512*M)
range(1, (max_jint - 1))
productMaximum size of marking stacksrc/share/vm/runtime/globals.hpp
MarkStackSizeOpenJDK10size_truntimeNOT_LP64(32*K) LP64_ONLY(4*M)productSize of marking stacksrc/share/vm/runtime/globals.hpp
MarkSweepAlwaysCompactCountOpenJDK10uintruntime4
range(1, max_juint)
productHow often should we fully compact the heap (ignoring the dead space parameters)src/share/vm/runtime/globals.hpp
MarkSweepDeadRatioOpenJDK10uintxruntime5
range(0, 100)
productPercentage (0-100) of the old gen allowed as dead wood. Serial mark sweep treats this as both the minimum and maximum value. CMS uses this value only if it falls back to mark sweep. Par compact uses a variable scale based on the density of the generation and treats this as the maximum value when the heap is either completely full or completely empty. Par compact also has a smaller default value; see arguments.cpp.src/share/vm/runtime/globals.hpp
MaxBCEAEstimateLevelOpenJDK10intxruntime5
range(0, max_jint)
productMaximum number of nested calls that are analyzed by BC EAsrc/share/vm/runtime/globals.hpp
MaxBCEAEstimateSizeOpenJDK10intxruntime150
range(0, max_jint)
productMaximum bytecode size of a method to be analyzed by BC EAsrc/share/vm/runtime/globals.hpp
MaxDirectMemorySizeOpenJDK10uint64_truntime0
range(0, max_jlong)
productMaximum total size of NIO direct-buffer allocationssrc/share/vm/runtime/globals.hpp
MaxElementPrintSizeOpenJDK10intxruntime256notproductmaximum number of elements to printsrc/share/vm/runtime/globals.hpp
MaxExpectedDataSegmentSizeOpenJDK10uintxaix8*GproductMaximum expected Data Segment Size.src/os/aix/vm/globals_aix.hpp
MaxFDLimitOpenJDK10boolruntimetrueproductBump the number of file descriptors to maximum in Solarissrc/share/vm/runtime/globals.hpp
MaxForceInlineLevelOpenJDK10intxruntime100
range(0, max_jint)
developmaximum number of nested calls that are forced for inlining (using CompileCommand or marked w/ @ForceInline)src/share/vm/runtime/globals.hpp
MaxGCMinorPauseMillisOpenJDK10Deprecated in JDK8uintxruntimemax_uintx
range(0, max_uintx)
productAdaptive size policy maximum GC minor pause time goal in millisecondsrc/share/vm/runtime/globals.hpp
MaxGCPauseMillisOpenJDK10uintxruntimemax_uintx - 1
range(1, max_uintx - 1)
productAdaptive size policy maximum GC pause time goal in millisecond, or (G1 Only) the maximum GC time per MMU time slicesrc/share/vm/runtime/globals.hpp
MaxHeapFreeRatioOpenJDK10uintxruntime70
range(0, 100)
manageableThe maximum percentage of heap free after GC to avoid shrinking. For most GCs this applies to the old generation. In G1 and ParallelGC it applies to the whole heap.src/share/vm/runtime/globals.hpp
MaxHeapSizeOpenJDK10size_truntimeScaleForWordSize(96*M)productMaximum heap size (in bytes)src/share/vm/runtime/globals.hpp
MaxInlineLevelOpenJDK10intxruntime9
range(0, max_jint)
productmaximum number of nested calls that are inlinedsrc/share/vm/runtime/globals.hpp
MaxInlineSizeOpenJDK10intxruntime35
range(0, max_jint)
productThe maximum bytecode size of a method to be inlinedsrc/share/vm/runtime/globals.hpp
MaxInterpretedSearchLengthOpenJDK10intxruntime3developThe maximum number of interpreted frames to skip when searching for recompileesrc/share/vm/runtime/globals.hpp
MaxJNILocalCapacityOpenJDK10intxruntime65536
range(min_intx, max_intx)
productMaximum allowable local JNI handle capacity to EnsureLocalCapacity() and PushLocalFrame(), where <= 0 is unlimited, default: 65536src/share/vm/runtime/globals.hpp
MaxJavaStackTraceDepthOpenJDK10intxruntime1024
range(0, max_jint/2)
productThe maximum number of lines in the stack trace for Java exceptions (0 means all)src/share/vm/runtime/globals.hpp
MaxJumpTableSizeOpenJDK10intxc265000
range(0, max_intx)
productMaximum number of targets in a generated jump tablesrc/share/vm/opto/c2_globals.hpp
MaxJumpTableSparsenessOpenJDK10intxc25
range(0, max_intx / 4)
productMaximum sparseness for jumptablessrc/share/vm/opto/c2_globals.hpp
MaxLabelRootDepthOpenJDK10intxc21100
range(100, max_jint)
productMaximum times call Label_Root to prevent stack overflowsrc/share/vm/opto/c2_globals.hpp
MaxLoopPadOpenJDK10intxc2(OptoLoopAlignment-1)
range(0, max_jint)
productAlign a loop if padding size in bytes is less or equal to this valuesrc/share/vm/opto/c2_globals.hpp
MaxMetaspaceExpansionOpenJDK10size_truntimeScaleForWordSize(4*M)
range(0, max_uintx)
productThe maximum expansion of Metaspace without full GC (in bytes)src/share/vm/runtime/globals.hpp
MaxMetaspaceFreeRatioOpenJDK10uintxruntime70
range(0, 100)
productThe maximum percentage of Metaspace free after GC to avoid shrinkingsrc/share/vm/runtime/globals.hpp
MaxMetaspaceSizeOpenJDK10size_truntimemax_uintxproductMaximum size of Metaspaces (in bytes)src/share/vm/runtime/globals.hpp
MaxNewSizeOpenJDK10size_truntimemax_uintx
range(0, max_uintx)
productMaximum new generation size (in bytes), max_uintx means set ergonomicallysrc/share/vm/runtime/globals.hpp
MaxNodeLimitOpenJDK10intxc280000
range(1000, max_jint / 3)
productMaximum number of nodessrc/share/vm/opto/c2_globals.hpp
MaxNodeLimitOpenJDK10intxshark65000productMaximum number of nodessrc/share/vm/shark/shark_globals.hpp
MaxRAMFractionOpenJDK10Deprecated in JDK10uintxruntime4
range(1, max_uintx)
productMaximum fraction (1/n) of real memory used for maximum heap sizesrc/share/vm/runtime/globals.hpp
MaxRAMOpenJDK10uint64_taarch64c11ULL*Gdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
MaxRAMOpenJDK10uint64_taarch64c2128ULL*Gdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
MaxRAMOpenJDK10uint64_tarmc11ULL*Gdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
MaxRAMOpenJDK10uint64_tarmc24ULL*Gdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
MaxRAMOpenJDK10uint64_truntimeproduct_pdReal memory size (in bytes) used to set maximum heap sizesrc/share/vm/runtime/globals.hpp
MaxRAMOpenJDK10uint64_tppcc11ULL*Gdefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
MaxRAMOpenJDK10uint64_tppcc24ULL*Gdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
MaxRAMOpenJDK10uint64_ts390c11ULL*Gdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
MaxRAMOpenJDK10uint64_ts390c2128ULL*Gdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
MaxRAMOpenJDK10uint64_tsparcc11ULL*Gdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
MaxRAMOpenJDK10uint64_tsparcc24ULL*Gdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
MaxRAMOpenJDK10uint64_tx86c11ULL*Gdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
MaxRAMOpenJDK10uint64_tx86c24ULL*Gdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
MaxRAMOpenJDK10uint64_tzeroshark1ULL*Gdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
MaxRecompilationSearchLengthOpenJDK10intxruntime10developThe maximum number of frames to inspect when searching for recompileesrc/share/vm/runtime/globals.hpp
MaxRecursiveInlineLevelOpenJDK10intxruntime1
range(0, max_jint)
productmaximum number of nested recursive calls that are inlinedsrc/share/vm/runtime/globals.hpp
MaxSubklassPrintSizeOpenJDK10intxruntime4notproductmaximum number of subklasses to print when printing klasssrc/share/vm/runtime/globals.hpp
MaxTenuringThresholdOpenJDK10uintxruntime15
range(0, markOopDesc::max_age + 1)
productMaximum value for tenuring thresholdsrc/share/vm/runtime/globals.hpp
MaxTrivialSizeOpenJDK10intxruntime6
range(0, max_jint)
productThe maximum bytecode size of a trivial method to be inlinedsrc/share/vm/runtime/globals.hpp
MaxVectorSizeOpenJDK10intxc264
range(0, max_jint)
productMax vector size in bytes, actual size could be less depending on elements typesrc/share/vm/opto/c2_globals.hpp
MaxVirtMemFractionOpenJDK10uintxruntime2developMaximum fraction (1/n) of virtual memory used for ergonomically determining maximum heap sizesrc/share/vm/runtime/globals.hpp
MemProfilingIntervalOpenJDK10intxruntime500notproductTime between each invocation of the MemProfilersrc/share/vm/runtime/globals.hpp
MemProfilingOpenJDK10boolruntimefalsedevelopWrite memory usage profiling to log filesrc/share/vm/runtime/globals.hpp
MetadataAllocationFailALotIntervalOpenJDK10uintxruntime1000developMetadata allocation failure a lot intervalsrc/share/vm/runtime/globals.hpp
MetadataAllocationFailALotOpenJDK10boolruntimefalsedevelopFail metadata allocations at intervals controlled by MetadataAllocationFailALotIntervalsrc/share/vm/runtime/globals.hpp
MetaspaceSizeOpenJDK10uintxaarch64c112*Mdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
MetaspaceSizeOpenJDK10uintxaarch64c2ScaleForWordSize(16*M)define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
MetaspaceSizeOpenJDK10size_tarmc112*Mdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
MetaspaceSizeOpenJDK10size_tarmc2ScaleForWordSize(16*M)define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
MetaspaceSizeOpenJDK10size_truntimeproduct_pdInitial threshold (in bytes) at which a garbage collection is done to reduce Metaspace usagesrc/share/vm/runtime/globals.hpp
MetaspaceSizeOpenJDK10uintxppcc112*Mdefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
MetaspaceSizeOpenJDK10size_tppcc2ScaleForWordSize(16*M)define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
MetaspaceSizeOpenJDK10size_ts390c112*Mdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
MetaspaceSizeOpenJDK10size_ts390c2ScaleForWordSize(16*M)define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
MetaspaceSizeOpenJDK10size_tsparcc112*Mdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
MetaspaceSizeOpenJDK10size_tsparcc2ScaleForWordSize(16*M)define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
MetaspaceSizeOpenJDK10size_tx86c112*Mdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
MetaspaceSizeOpenJDK10size_tx86c2ScaleForWordSize(16*M)define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
MetaspaceSizeOpenJDK10size_tzeroshark12*Mdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
MethodFlushingOpenJDK10boolruntimetrueproductReclamation of zombie and not-entrant methodssrc/share/vm/runtime/globals.hpp
MethodHistogramCutoffOpenJDK10intxruntime100developThe cutoff value for method invocation histogram (+CountCalls)src/share/vm/runtime/globals.hpp
MethodProfileWidthOpenJDK10intxjvmci0experimentalNumber of methods to record in call profilesrc/share/vm/jvmci/jvmci_globals.hpp
MinHeapDeltaBytesOpenJDK10size_truntimeScaleForWordSize(128*K)
range(0, max_uintx)
productThe minimum change in heap space due to GC (in bytes)src/share/vm/runtime/globals.hpp
MinHeapFreeRatioOpenJDK10uintxruntime40
range(0, 100)
manageableThe minimum percentage of heap free after GC to avoid expansion. For most GCs this applies to the old generation. In G1 and ParallelGC it applies to the whole heap.src/share/vm/runtime/globals.hpp
MinInliningThresholdOpenJDK10intxruntime250
range(0, max_jint)
productThe minimum invocation count a method needs to have to be inlinedsrc/share/vm/runtime/globals.hpp
MinJumpTableSizeOpenJDK10intxaarch64c210define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
MinJumpTableSizeOpenJDK10intxarmc216define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
MinJumpTableSizeOpenJDK10intxc2product_pdMinimum number of targets in a generated jump tablesrc/share/vm/opto/c2_globals.hpp
MinJumpTableSizeOpenJDK10intxppcc210define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
MinJumpTableSizeOpenJDK10intxs390c218define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
MinJumpTableSizeOpenJDK10intxsparcc25define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
MinJumpTableSizeOpenJDK10intxx86c210define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
MinMetaspaceExpansionOpenJDK10size_truntimeScaleForWordSize(256*K)
range(0, max_uintx)
productThe minimum expansion of Metaspace (in bytes)src/share/vm/runtime/globals.hpp
MinMetaspaceFreeRatioOpenJDK10uintxruntime40
range(0, 99)
productThe minimum percentage of Metaspace free after GC to avoid expansionsrc/share/vm/runtime/globals.hpp
MinOopMapAllocationOpenJDK10intxruntime8developMinimum number of OopMap entries in an OopMapSetsrc/share/vm/runtime/globals.hpp
MinPassesBeforeFlushOpenJDK10intxruntime10
range(0, max_intx)
diagnosticMinimum number of sweeper passes before an nmethod can be flushedsrc/share/vm/runtime/globals.hpp
MinRAMFractionOpenJDK10Deprecated in JDK10uintxruntime2
range(1, max_uintx)
productMinimum fraction (1/n) of real memory used for maximum heap size on systems with small physical memory sizesrc/share/vm/runtime/globals.hpp
MinSleepIntervalOpenJDK6Deprecated in JDK9
Obsoleted in JDK10
Expired in JDK11
intxruntime1developMinimum sleep() interval (milliseconds) when ConvertSleepToYield is off (used for Solaris)src/share/vm/runtime/globals.hpp
MinSurvivorRatioOpenJDK10uintxruntime3
range(3, max_uintx)
productMinimum ratio of young generation/survivor space sizesrc/share/vm/runtime/globals.hpp
MinTLABSizeOpenJDK10size_truntime2*K
range(1, max_uintx/2)
productMinimum allowed TLAB size (in bytes)src/share/vm/runtime/globals.hpp
MonitorBoundOpenJDK10Deprecated in JDK14
Obsoleted in JDK15
Expired in JDK16
intxruntime0
range(0, max_jint)
productBound Monitor populationsrc/share/vm/runtime/globals.hpp
MonitorInUseListsOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
Expired in JDK13
boolruntimetrueproductTrack Monitors for Deflationsrc/share/vm/runtime/globals.hpp
MonomorphicArrayCheckOpenJDK10boolc2truedevelopUncommon-trap array store checks that require full type checksrc/share/vm/opto/c2_globals.hpp
MultiArrayExpandLimitOpenJDK10intxc26
range(0, max_jint)
productMaximum number of individual allocations in an inline-expanded multianewarray instructionsrc/share/vm/opto/c2_globals.hpp
MustCallLoadClassInternalOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
boolruntimefalseproductCall loadClassInternal() rather than loadClass()src/share/vm/runtime/globals.hpp
NMethodSizeLimitOpenJDK10intxc1(64*K)*wordSize
range(0, max_jint)
developMaximum size of a compiled method.src/share/vm/c1/c1_globals.hpp
NUMAChunkResizeWeightOpenJDK10uintxruntime20
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying average for AdaptiveNUMAChunkSizingsrc/share/vm/runtime/globals.hpp
NUMAInterleaveGranularityOpenJDK10size_truntime2*M
range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G))
productGranularity to use for NUMA interleaving on Windows OSsrc/share/vm/runtime/globals.hpp
NUMAPageScanRateOpenJDK10uintxruntime256
range(0, max_uintx)
productMaximum number of pages to include in the page scan proceduresrc/share/vm/runtime/globals.hpp
NUMASpaceResizeRateOpenJDK10size_truntime1*G
range(0, max_uintx)
productDo not reallocate more than this amount per collectionsrc/share/vm/runtime/globals.hpp
NUMAStatsOpenJDK10boolruntimefalseproductPrint NUMA stats in detailed heap informationsrc/share/vm/runtime/globals.hpp
NativeMemoryTrackingOpenJDK10ccstrruntimeoffproductNative memory tracking optionssrc/share/vm/runtime/globals.hpp
NativeMonitorFlagsOpenJDK10Obsoleted in JDK11
Expired in JDK12
intxruntime0experimental(Unstable)src/share/vm/runtime/globals.hpp
NativeMonitorSpinLimitOpenJDK10Obsoleted in JDK11
Expired in JDK12
intxruntime20experimental(Unstable)src/share/vm/runtime/globals.hpp
NativeMonitorTimeoutOpenJDK10Obsoleted in JDK11
Expired in JDK12
intxruntime-1experimental(Unstable)src/share/vm/runtime/globals.hpp
NearCpoolOpenJDK10boolaarch64trueproductconstant pool is close to instructionssrc/cpu/aarch64/vm/globals_aarch64.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolaarch64falsedefine_pd_global// only register window machines need thissrc/cpu/aarch64/vm/globals_aarch64.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolarmfalsedefine_pd_global// only register window machines need thissrc/cpu/arm/vm/globals_arm.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolruntimeproduct_pdTrue for register window machines (sparc/ia64)src/share/vm/runtime/globals.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolppcfalsedefine_pd_global// Only register window machines need this.src/cpu/ppc/vm/globals_ppc.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
bools390falsedefine_pd_global// Only register window machines need this.src/cpu/s390/vm/globals_s390.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolsparctruedefine_pd_global// register window machines need thissrc/cpu/sparc/vm/globals_sparc.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolx86falsedefine_pd_global// only register window machines need thissrc/cpu/x86/vm/globals_x86.hpp
NeedsDeoptSuspendOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolzerofalsedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
NestedInliningSizeRatioOpenJDK10intxc190
range(0, 100)
developPercentage of prev. allowed inline size in recursive inliningsrc/share/vm/c1/c1_globals.hpp
NeverActAsServerClassMachineOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
NeverActAsServerClassMachineOpenJDK10boolaarch64c2falsedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
NeverActAsServerClassMachineOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
NeverActAsServerClassMachineOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
NeverActAsServerClassMachineOpenJDK10boolruntimeproduct_pdNever act like a server-class machinesrc/share/vm/runtime/globals.hpp
NeverActAsServerClassMachineOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
NeverActAsServerClassMachineOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
NeverActAsServerClassMachineOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
NeverActAsServerClassMachineOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
NeverActAsServerClassMachineOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
NeverActAsServerClassMachineOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
NeverActAsServerClassMachineOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
NeverActAsServerClassMachineOpenJDK10boolx86c2falsedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
NeverActAsServerClassMachineOpenJDK10boolzerosharktruedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
NeverTenureOpenJDK10boolruntimefalseproductNever tenure objects in eden, may tenure on overflow (ParallelGC only)src/share/vm/runtime/globals.hpp
NewCodeParameterOpenJDK10intxruntime0developTesting Only: Create a dedicated integer parameter before putbacksrc/share/vm/runtime/globals.hpp
NewRatioOpenJDK10uintxruntime2
range(0, max_uintx-1)
productRatio of old/new generation sizessrc/share/vm/runtime/globals.hpp
NewRatioOpenJDK10uintxzeroshark12define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
NewSizeThreadIncreaseOpenJDK10intxaarch64c14*Kdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
NewSizeThreadIncreaseOpenJDK10intxaarch64c2ScaleForWordSize(4*K)define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
NewSizeThreadIncreaseOpenJDK10size_tarmc14*Kdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
NewSizeThreadIncreaseOpenJDK10size_tarmc2ScaleForWordSize(4*K)define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
NewSizeThreadIncreaseOpenJDK10size_truntimeproduct_pdAdditional size added to desired new generation size per non-daemon thread (in bytes)src/share/vm/runtime/globals.hpp
NewSizeThreadIncreaseOpenJDK10intxppcc116*Kdefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
NewSizeThreadIncreaseOpenJDK10size_tppcc2ScaleForWordSize(4*K)define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
NewSizeThreadIncreaseOpenJDK10size_ts390c116*Kdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
NewSizeThreadIncreaseOpenJDK10size_ts390c2ScaleForWordSize(4*K)define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
NewSizeThreadIncreaseOpenJDK10size_tsparcc116*Kdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
NewSizeThreadIncreaseOpenJDK10size_tsparcc2ScaleForWordSize(4*K)define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
NewSizeThreadIncreaseOpenJDK10size_tx86c14*Kdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
NewSizeThreadIncreaseOpenJDK10size_tx86c24*Kdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
NewSizeThreadIncreaseOpenJDK10size_tzeroshark4*Kdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
NewSizeOpenJDK10size_truntimeScaleForWordSize(1*M)productInitial new generation size (in bytes)src/share/vm/runtime/globals.hpp
NmethodSweepActivityOpenJDK10intxruntime10
range(0, 2000)
productRemoves cold nmethods from code cache if > 0. Higher values result in more aggressive sweepingsrc/share/vm/runtime/globals.hpp
NodeCountInliningCutoffOpenJDK10intxc218000
range(0, max_jint)
developIf parser node generation exceeds limit stop inliningsrc/share/vm/opto/c2_globals.hpp
NodeCountInliningStepOpenJDK10intxc21000
range(0, max_jint)
developTarget size of warm calls inlined between optimization passessrc/share/vm/opto/c2_globals.hpp
NodeLimitFudgeFactorOpenJDK10intxc22000productFudge Factor for certain optimizationssrc/share/vm/opto/c2_globals.hpp
NonNMethodCodeHeapSizeOpenJDK10intxaarch64c15*Mdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
NonNMethodCodeHeapSizeOpenJDK10intxaarch64c25*Mdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
NonNMethodCodeHeapSizeOpenJDK10size_tarmc15*Mdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
NonNMethodCodeHeapSizeOpenJDK10size_tarmc25*Mdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
NonNMethodCodeHeapSizeOpenJDK10uintxruntimeproduct_pdSize of code heap with non-nmethods (in bytes)src/share/vm/runtime/globals.hpp
NonNMethodCodeHeapSizeOpenJDK10intxppcc25*Mdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
NonNMethodCodeHeapSizeOpenJDK10uintxs390c15*Mdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
NonNMethodCodeHeapSizeOpenJDK10uintxs390c25*Mdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
NonNMethodCodeHeapSizeOpenJDK10intxsparcc15*Mdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
NonNMethodCodeHeapSizeOpenJDK10intxsparcc25*Mdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
NonNMethodCodeHeapSizeOpenJDK10intxx86c15*Mdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
NonNMethodCodeHeapSizeOpenJDK10intxx86c25*Mdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
NonNMethodCodeHeapSizeOpenJDK10intxzeroshark5*Mdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
NonProfiledCodeHeapSizeOpenJDK10intxaarch64c113*Mdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
NonProfiledCodeHeapSizeOpenJDK10intxaarch64c221*Mdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
NonProfiledCodeHeapSizeOpenJDK10size_tarmc113*Mdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
NonProfiledCodeHeapSizeOpenJDK10size_tarmc213*Mdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
NonProfiledCodeHeapSizeOpenJDK10uintxruntimeproduct_pdSize of code heap with non-profiled methods (in bytes)src/share/vm/runtime/globals.hpp
NonProfiledCodeHeapSizeOpenJDK10intxppcc2125*Mdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
NonProfiledCodeHeapSizeOpenJDK10uintxs390c113*Mdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
NonProfiledCodeHeapSizeOpenJDK10uintxs390c221*Mdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
NonProfiledCodeHeapSizeOpenJDK10intxsparcc113*Mdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
NonProfiledCodeHeapSizeOpenJDK10intxsparcc213*Mdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
NonProfiledCodeHeapSizeOpenJDK10intxx86c113*Mdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
NonProfiledCodeHeapSizeOpenJDK10intxx86c221*Mdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
NonProfiledCodeHeapSizeOpenJDK10intxzeroshark13*Mdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
NotifySimulatorOpenJDK10boolaarch64UseBuiltinSimproducttell the AArch64 sim where we are in method codesrc/cpu/aarch64/vm/globals_aarch64.hpp
NumberOfLoopInstrToAlignOpenJDK10intxc24
range(0, max_jint)
productNumber of first instructions in a loop to alignsrc/share/vm/opto/c2_globals.hpp
OSROnlyBCIOpenJDK10intxruntime-1developOSR only at this bci. Negative values mean exclude that bcisrc/share/vm/runtime/globals.hpp
ObjArrayMarkingStrideOpenJDK10uintxruntime2048developNumber of object array elements to push onto the marking stack before pushing a continuation entrysrc/share/vm/runtime/globals.hpp
ObjectAlignmentInBytesOpenJDK10intxruntime8
range(8, 256)
lp64_productDefault object alignment in bytes, 8 is minimumsrc/share/vm/runtime/globals.hpp
ObjectCountCutOffPercentOpenJDK10doubleruntime0.5
range(0.0, 100.0)
experimentalThe percentage of the used heap that the instances of a class must occupy for the class to generate a trace eventsrc/share/vm/runtime/globals.hpp
OldPLABSizeOpenJDK10size_truntime1024productSize of old gen promotion LAB's (in HeapWords), or Number of blocks to attempt to claim when refilling CMS LAB'ssrc/share/vm/runtime/globals.hpp
OldPLABWeightOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime50
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying average for resizing OldPLABSizesrc/share/vm/runtime/globals.hpp
OldSizeOpenJDK10size_truntimeScaleForWordSize(4*M)
range(0, max_uintx)
productInitial tenured generation size (in bytes)src/share/vm/runtime/globals.hpp
OmitStackTraceInFastThrowOpenJDK10boolruntimetrueproductOmit backtraces for some 'hot' exceptions in optimized codesrc/share/vm/runtime/globals.hpp
OnErrorOpenJDK10ccstrlistruntimeRun user-defined commands on fatal error; see VMError.cpp for examplesproductsrc/share/vm/runtime/globals.hpp
OnOutOfMemoryErrorOpenJDK10ccstrlistruntimeRun user-defined commands on first java.lang.OutOfMemoryErrorproductsrc/share/vm/runtime/globals.hpp
OnStackReplacePercentageOpenJDK10intxaarch64c1933define_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
OnStackReplacePercentageOpenJDK10intxaarch64c2140define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
OnStackReplacePercentageOpenJDK10intxarmc1933define_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
OnStackReplacePercentageOpenJDK10intxarmc2140define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
OnStackReplacePercentageOpenJDK10intxruntimeproduct_pdNON_TIERED number of method invocations/branches (expressed as % of CompileThreshold) before (re-)compiling OSR codesrc/share/vm/runtime/globals.hpp
OnStackReplacePercentageOpenJDK10intxppcc11400define_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
OnStackReplacePercentageOpenJDK10intxppcc2140define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
OnStackReplacePercentageOpenJDK10intxs390c11400define_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
OnStackReplacePercentageOpenJDK10intxs390c2140define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
OnStackReplacePercentageOpenJDK10intxsparcc11400define_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
OnStackReplacePercentageOpenJDK10intxsparcc2140define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
OnStackReplacePercentageOpenJDK10intxx86c1933define_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
OnStackReplacePercentageOpenJDK10intxx86c2140define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
OnStackReplacePercentageOpenJDK10intxzeroshark933define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
OptimizeExpensiveOpsOpenJDK10boolc2truediagnosticFind best control for expensive operationssrc/share/vm/opto/c2_globals.hpp
OptimizeFillOpenJDK10boolc2true PPC64_ONLY(&& false)productconvert fill/copy loops into intrinsicsrc/share/vm/opto/c2_globals.hpp
OptimizeIfOpsOpenJDK10boolc1truedevelopOptimize multiple IfOpssrc/share/vm/c1/c1_globals.hpp
OptimizePollingPageLocationOpenJDK10boolaixtrueproductOptimize the location of the polling page used for Safepointssrc/os/aix/vm/globals_aix.hpp
OptimizePtrCompareOpenJDK10boolc2trueproductUse escape analysis to optimize pointers comparesrc/share/vm/opto/c2_globals.hpp
OptimizeSinglePrecisionOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
OptimizeSinglePrecisionOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
OptimizeSinglePrecisionOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
OptimizeSinglePrecisionOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
OptimizeSinglePrecisionOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
OptimizeSinglePrecisionOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
OptimizeStringConcatOpenJDK10boolc2trueproductOptimize the construction of Strings by StringBuildersrc/share/vm/opto/c2_globals.hpp
OptimizeUnsafesOpenJDK10boolc1truedevelopOptimize raw unsafe opssrc/share/vm/c1/c1_globals.hpp
OptoBlockListSizeOpenJDK10intxc28
range(0, max_jint)
developStarting allocation size of Block_List data structuressrc/share/vm/opto/c2_globals.hpp
OptoBreakpointC2ROpenJDK10boolc2falsenotproductinsert breakpoint at runtime stub entrysrc/share/vm/opto/c2_globals.hpp
OptoBreakpointOSROpenJDK10boolc2falsenotproductinsert breakpoint at osr method entrysrc/share/vm/opto/c2_globals.hpp
OptoBreakpointOpenJDK10boolc2falsedevelopinsert breakpoint at method entrysrc/share/vm/opto/c2_globals.hpp
OptoBundlingOpenJDK10boolaarch64c2falsedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
OptoBundlingOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
OptoBundlingOpenJDK10boolc2product_pdGenerate nops to fill i-cache linessrc/share/vm/opto/c2_globals.hpp
OptoBundlingOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
OptoBundlingOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
OptoBundlingOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
OptoBundlingOpenJDK10boolx86c2falsedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
OptoCoalesceOpenJDK10boolc2truedevelopUse Conservative Copy Coalescing in the Register Allocatorsrc/share/vm/opto/c2_globals.hpp
OptoLoopAlignmentOpenJDK10intxaarch6416define_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
OptoLoopAlignmentOpenJDK10intxarm16define_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
OptoLoopAlignmentOpenJDK10intxruntimeproduct_pdAlign inner loops to zero relative to this modulussrc/share/vm/runtime/globals.hpp
OptoLoopAlignmentOpenJDK10intxppc16define_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
OptoLoopAlignmentOpenJDK10intxs3902define_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
OptoLoopAlignmentOpenJDK10intxsparc16define_pd_global// = 4*wordSizesrc/cpu/sparc/vm/globals_sparc.hpp
OptoLoopAlignmentOpenJDK10intxx8616define_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
OptoLoopAlignmentOpenJDK10intxzero16define_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
OptoNoExecuteOpenJDK10boolc2falsenotproductAttempt to parse and compile but do not execute generated codesrc/share/vm/opto/c2_globals.hpp
OptoNodeListSizeOpenJDK10intxc24
range(0, max_jint)
developStarting allocation size of Node_List data structuressrc/share/vm/opto/c2_globals.hpp
OptoPeepholeAtOpenJDK10intxc2-1developApply peephole optimizations to this peephole rulesrc/share/vm/opto/c2_globals.hpp
OptoPeepholeOpenJDK10boolaarch64c2falsedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
OptoPeepholeOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
OptoPeepholeOpenJDK10boolc2develop_pdApply peephole optimizations after register allocationsrc/share/vm/opto/c2_globals.hpp
OptoPeepholeOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
OptoPeepholeOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
OptoPeepholeOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
OptoPeepholeOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
OptoPrologueNopsOpenJDK10intxc20
range(0, 128)
developInsert this many extra nop instructions in the prologue of every nmethodsrc/share/vm/opto/c2_globals.hpp
OptoRegSchedulingOpenJDK10boolaarch64c2falsedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
OptoRegSchedulingOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
OptoRegSchedulingOpenJDK10boolc2product_pdInstruction Scheduling before register allocation for pressuresrc/share/vm/opto/c2_globals.hpp
OptoRegSchedulingOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
OptoRegSchedulingOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
OptoRegSchedulingOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
OptoRegSchedulingOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
OptoRemoveUselessOpenJDK10boolc2truedevelopRemove useless nodes after parsingsrc/share/vm/opto/c2_globals.hpp
OptoSchedulingOpenJDK10boolaarch64c2falsedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
OptoSchedulingOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
OptoSchedulingOpenJDK10boolc2product_pdInstruction Scheduling after register allocationsrc/share/vm/opto/c2_globals.hpp
OptoSchedulingOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
OptoSchedulingOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
OptoSchedulingOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
OptoSchedulingOpenJDK10boolx86c2falsedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
PLABWeightOpenJDK10uintxruntime75
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying average for ResizePLABsrc/share/vm/runtime/globals.hpp
PSAdaptiveSizePolicyResizeVirtualSpaceAlotOpenJDK10intxruntime-1
range(-1, 1)
developResize the virtual spaces of the young or old generationssrc/share/vm/runtime/globals.hpp
PSChunkLargeArraysOpenJDK10boolruntimetrueproductProcess large arrays in chunkssrc/share/vm/runtime/globals.hpp
ParGCArrayScanChunkOpenJDK10intruntime50
range(1, max_jint/3)
productScan a subset of object array and push remainder, if array is bigger than thissrc/share/vm/runtime/globals.hpp
ParGCCardsPerStrideChunkOpenJDK10intxruntime256
range(1, max_intx)
diagnosticThe number of cards in each chunk of the parallel chunks used during card table scanningsrc/share/vm/runtime/globals.hpp
ParGCDesiredObjsFromOverflowListOpenJDK10Obsoleted in JDK14
Expired in JDK15
uintxruntime20
range(0, max_uintx)
productThe desired number of objects to claim from the overflow listsrc/share/vm/runtime/globals.hpp
ParGCStridesPerThreadOpenJDK10uintxruntime2
range(1, max_uintx)
diagnosticThe number of strides per worker thread that we divide up the card table scanning work intosrc/share/vm/runtime/globals.hpp
ParGCTrimOverflowOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductEagerly trim the local overflow lists (when ParGCUseLocalOverflow)src/share/vm/runtime/globals.hpp
ParGCUseLocalOverflowOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductInstead of a global overflow list, use local overflow stackssrc/share/vm/runtime/globals.hpp
ParGCWorkQueueOverflowALotOpenJDK10boolruntimefalsenotproductSimulate work queue overflow in ParNewsrc/share/vm/runtime/globals.hpp
ParGCWorkQueueOverflowIntervalOpenJDK10uintxruntime1000notproductAn `interval' counter that determines how frequently we simulate overflow; a smaller number increases frequencysrc/share/vm/runtime/globals.hpp
ParallelGCBufferWastePctOpenJDK10uintxruntime10
range(0, 100)
productWasted fraction of parallel allocation buffersrc/share/vm/runtime/globals.hpp
ParallelGCThreadsOpenJDK10uintruntime0productNumber of parallel threads parallel gc will usesrc/share/vm/runtime/globals.hpp
ParallelOldDeadWoodLimiterMeanOpenJDK10uintxruntime50
range(0, 100)
productThe mean used by the parallel compact dead wood limiter (a number between 0-100)src/share/vm/runtime/globals.hpp
ParallelOldDeadWoodLimiterStdDevOpenJDK10uintxruntime80
range(0, 100)
productThe standard deviation used by the parallel compact dead wood limiter (a number between 0-100)src/share/vm/runtime/globals.hpp
ParallelRefProcBalancingEnabledOpenJDK10boolruntimetrueproductEnable balancing of reference processing queuessrc/share/vm/runtime/globals.hpp
ParallelRefProcEnabledOpenJDK10boolruntimefalseproductEnable parallel reference processing whenever possiblesrc/share/vm/runtime/globals.hpp
PartialPeelAtUnsignedTestsOpenJDK10boolc2trueproductPartial peel at unsigned tests if no signed test existssrc/share/vm/opto/c2_globals.hpp
PartialPeelLoopOpenJDK10boolc2trueproductPartial peel (rotate) loopssrc/share/vm/opto/c2_globals.hpp
PartialPeelNewPhiDeltaOpenJDK10intxc20
range(0, max_jint)
productAdditional phis that can be created by partial peelingsrc/share/vm/opto/c2_globals.hpp
PatchALotOpenJDK10boolc1falsedevelopMarks all fields as having unloaded classessrc/share/vm/c1/c1_globals.hpp
PauseAtExitOpenJDK10boolruntimefalsediagnosticPause and wait for keypress on exit if a debugger is attachedsrc/share/vm/runtime/globals.hpp
PauseAtStartupFileOpenJDK10ccstrruntimeNULLdiagnosticThe file to create and for whose removal to await when pausing at startup. (default: ./vm.paused.<pid>)src/share/vm/runtime/globals.hpp
PauseAtStartupOpenJDK10boolruntimefalsediagnosticCauses the VM to pause at startup time and wait for the pause file to be removed (default: ./vm.paused.<pid>)src/share/vm/runtime/globals.hpp
PausePaddingOpenJDK10uintxruntime1
range(0, max_juint)
productHow much buffer to keep for pause timesrc/share/vm/runtime/globals.hpp
PerBytecodeRecompilationCutoffOpenJDK10intxruntime200
range(-1, max_intx)
productPer-BCI limit on repeated recompilation (-1=>'Inf')src/share/vm/runtime/globals.hpp
PerBytecodeTrapLimitOpenJDK10intxruntime4
range(0, max_jint)
productLimit on traps (of one kind) at a particular BCIsrc/share/vm/runtime/globals.hpp
PerMethodRecompilationCutoffOpenJDK10intxruntime400
range(-1, max_intx)
productAfter recompiling N times, stay in the interpreter (-1=>'Inf')src/share/vm/runtime/globals.hpp
PerMethodSpecTrapLimitOpenJDK10intxruntime5000
range(0, max_jint)
experimentalLimit on speculative traps (of one kind) in a method (includes inlines)src/share/vm/runtime/globals.hpp
PerMethodTrapLimitOpenJDK10intxruntime100
range(0, max_jint)
productLimit on traps (of one kind) in a method (includes inlines)src/share/vm/runtime/globals.hpp
PerfAllowAtExitRegistrationOpenJDK10boolruntimefalseproductAllow registration of atexit() methodssrc/share/vm/runtime/globals.hpp
PerfBypassFileSystemCheckOpenJDK10boolruntimefalseproductBypass Win32 file system criteria checks (Windows Only)src/share/vm/runtime/globals.hpp
PerfDataMemorySizeOpenJDK10intxruntime32*K
range(128, 32*64*K)
productSize of performance data memory region. Will be rounded up to a multiple of the native os page size.src/share/vm/runtime/globals.hpp
PerfDataSamplingIntervalOpenJDK10intxruntime50
range(PeriodicTask::min_interval, max_jint)
productData sampling interval (in milliseconds)src/share/vm/runtime/globals.hpp
PerfDataSaveFileOpenJDK10ccstrruntimeNULLproductSave PerfData memory to the specified absolute pathname. The string %p in the file name (if present) will be replaced by pidsrc/share/vm/runtime/globals.hpp
PerfDataSaveToFileOpenJDK10boolruntimefalseproductSave PerfData memory to hsperfdata_<pid> file on exitsrc/share/vm/runtime/globals.hpp
PerfDisableSharedMemOpenJDK10boolruntimefalseproductStore performance data in standard memorysrc/share/vm/runtime/globals.hpp
PerfMaxStringConstLengthOpenJDK10intxruntime1024
range(32, 32*K)
productMaximum PerfStringConstant string length before truncationsrc/share/vm/runtime/globals.hpp
PerfTraceDataCreationOpenJDK6boolruntimefalsedevelopTrace creation of Performance Data Entriessrc/share/vm/runtime/globals.hpp
PerfTraceMemOpsOpenJDK6boolruntimefalsedevelopTrace PerfMemory create/attach/detach callssrc/share/vm/runtime/globals.hpp
PinAllInstructionsOpenJDK10boolc1falsedevelopAll instructions are pinnedsrc/share/vm/c1/c1_globals.hpp
PoisonOSREntryOpenJDK10boolc2truedevelopDetect abnormal calls to OSR codesrc/share/vm/opto/c2_globals.hpp
PostLoopMultiversioningOpenJDK10boolc2falseexperimentalMulti versioned post loops to eliminate range checkssrc/share/vm/opto/c2_globals.hpp
PowerArchitecturePPC64OpenJDK10uintxppc0productCPU Version: x for PowerX. Currently recognizes Power5 to Power8. Default is 0. Newer CPUs will be recognized as Power8.src/cpu/ppc/vm/globals_ppc.hpp
PreTouchParallelChunkSizeOpenJDK10size_truntime1 * G
range(1, SIZE_MAX / 2)
productPer-thread chunk size for parallel memory pre-touch.src/share/vm/runtime/globals.hpp
PreallocatedOutOfMemoryErrorCountOpenJDK10uintxruntime4developNumber of OutOfMemoryErrors preallocated with backtracesrc/share/vm/runtime/globals.hpp
PredictedLoadedClassCountOpenJDK6intxruntime0experimentalExperimental: Tune loaded class cache starting sizesrc/share/vm/runtime/globals.hpp
PreferInterpreterNativeStubsOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
PreferInterpreterNativeStubsOpenJDK10boolaarch64c2falsedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
PreferInterpreterNativeStubsOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
PreferInterpreterNativeStubsOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
PreferInterpreterNativeStubsOpenJDK10boolruntimeproduct_pdUse always interpreter stubs for native methods invoked via interpretersrc/share/vm/runtime/globals.hpp
PreferInterpreterNativeStubsOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
PreferInterpreterNativeStubsOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
PreferInterpreterNativeStubsOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
PreferInterpreterNativeStubsOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
PreferInterpreterNativeStubsOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
PreferInterpreterNativeStubsOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
PreferInterpreterNativeStubsOpenJDK10boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
PreferInterpreterNativeStubsOpenJDK10boolx86c2falsedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
PreferInterpreterNativeStubsOpenJDK10boolzerosharkfalsedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
PreferLAoverADDOpenJDK10bools390falseproductUse LA/LAY instructions over ADD instructions (z/Architecture).src/cpu/s390/vm/globals_s390.hpp
PrefetchCopyIntervalInBytesOpenJDK10intxruntime-1
range(-1, max_jint)
productHow far ahead to prefetch destination area (<= 0 means off)src/share/vm/runtime/globals.hpp
PrefetchFieldsAheadOpenJDK10intxruntime-1
range(-1, max_jint)
productHow many fields ahead to prefetch in oop scan (<= 0 means off)src/share/vm/runtime/globals.hpp
PrefetchScanIntervalInBytesOpenJDK10intxruntime-1
range(-1, max_jint)
productHow far ahead to prefetch scan area (<= 0 means off)src/share/vm/runtime/globals.hpp
PreserveAllAnnotationsOpenJDK10boolruntimefalseproductPreserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotationssrc/share/vm/runtime/globals.hpp
PreserveFramePointerOpenJDK10boolaarch64falsedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
PreserveFramePointerOpenJDK10boolarmfalsedefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
PreserveFramePointerOpenJDK10boolruntimeproduct_pdUse the FP register for holding the frame pointer and not as a general purpose register.src/share/vm/runtime/globals.hpp
PreserveFramePointerOpenJDK10boolppcfalsedefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
PreserveFramePointerOpenJDK10bools390falsedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
PreserveFramePointerOpenJDK10boolsparcfalsedefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
PreserveFramePointerOpenJDK10boolx86falsedefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
PreserveFramePointerOpenJDK10boolzerofalsedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
PretenureSizeThresholdOpenJDK10size_truntime0
range(0, max_uintx)
productMaximum size in bytes of objects allocated in DefNew generation; zero means no maximumsrc/share/vm/runtime/globals.hpp
PrintAOTStatisticsOpenJDK10boolruntimefalsenotproductPrint AOT statisticssrc/share/vm/runtime/globals.hpp
PrintAOTOpenJDK10boolruntimefalseproductPrint used AOT klasses and methodssrc/share/vm/runtime/globals.hpp
PrintAdapterHandlersOpenJDK10boolruntimefalsediagnosticPrint code generated for i2c/c2i adapterssrc/share/vm/runtime/globals.hpp
PrintAssemblyOptionsOpenJDK10ccstrruntimeNULLdiagnosticPrint options string passed to disassembler.sosrc/share/vm/runtime/globals.hpp
PrintAssemblyOpenJDK10boolruntimefalsediagnosticPrint assembly code (using external disassembler.so)src/share/vm/runtime/globals.hpp
PrintBailoutsOpenJDK10boolc1falsedevelopPrint bailout and its reasonsrc/share/vm/c1/c1_globals.hpp
PrintBiasedLockingStatisticsOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
boolruntimefalsediagnosticPrint statistics of biased locking in JVMsrc/share/vm/runtime/globals.hpp
PrintBlockEliminationOpenJDK10boolc1falsedevelopPrint basic block eliminationsrc/share/vm/c1/c1_globals.hpp
PrintBootstrapOpenJDK10booljvmcitrueexperimentalPrint JVMCI bootstrap progress and summarysrc/share/vm/jvmci/jvmci_globals.hpp
PrintBytecodeHistogramOpenJDK10boolruntimefalsedevelopPrint histogram of the executed bytecodessrc/share/vm/runtime/globals.hpp
PrintBytecodePairHistogramOpenJDK10boolruntimefalsedevelopPrint histogram of the executed bytecode pairssrc/share/vm/runtime/globals.hpp
PrintC1StatisticsOpenJDK10boolc1falsenotproductPrint Compiler1 statisticssrc/share/vm/c1/c1_globals.hpp
PrintCEEOpenJDK10boolc1falsedevelopPrint Conditional Expression Eliminationsrc/share/vm/c1/c1_globals.hpp
PrintCFG0OpenJDK10boolc1falsenotproductPrint control flow graph after constructionsrc/share/vm/c1/c1_globals.hpp
PrintCFG1OpenJDK10boolc1falsenotproductPrint control flow graph after optimizationssrc/share/vm/c1/c1_globals.hpp
PrintCFG2OpenJDK10boolc1falsenotproductPrint control flow graph before code generationsrc/share/vm/c1/c1_globals.hpp
PrintCFGBlockFreqOpenJDK10boolc2falsedevelopPrint CFG block freqenciessrc/share/vm/opto/c2_globals.hpp
PrintCFGToFileOpenJDK10boolc1falsedevelopprint control flow graph to a separate file during compilationsrc/share/vm/c1/c1_globals.hpp
PrintCFGOpenJDK10boolc1falsenotproductPrint control flow graph after each changesrc/share/vm/c1/c1_globals.hpp
PrintCanonicalizationOpenJDK10boolc1falsedevelopPrint graph node canonicalizationsrc/share/vm/c1/c1_globals.hpp
PrintClassHistogramOpenJDK10boolruntimefalsemanageablePrint a histogram of class instancessrc/share/vm/runtime/globals.hpp
PrintCodeCache2OpenJDK10boolruntimefalsedevelopPrint detailed usage information on the code cache when exitingsrc/share/vm/runtime/globals.hpp
PrintCodeCacheExtensionOpenJDK10boolruntimefalsedevelopPrint extension of code cachesrc/share/vm/runtime/globals.hpp
PrintCodeCacheOnCompilationOpenJDK10boolruntimefalseproductPrint the code cache memory usage each time a method is compiledsrc/share/vm/runtime/globals.hpp
PrintCodeCacheOpenJDK10boolruntimefalseproductPrint the code cache memory usage when exitingsrc/share/vm/runtime/globals.hpp
PrintCommandLineFlagsOpenJDK10boolruntimefalseproductPrint flags specified on command line or set by ergonomicssrc/share/vm/runtime/globals.hpp
PrintCompilation2OpenJDK10boolruntimefalsediagnosticPrint additional statistics per compilationsrc/share/vm/runtime/globals.hpp
PrintCompilationOpenJDK10boolruntimefalseproductPrint compilationssrc/share/vm/runtime/globals.hpp
PrintConcurrentLocksOpenJDK10boolruntimefalsemanageablePrint java.util.concurrent locks in thread dumpsrc/share/vm/runtime/globals.hpp
PrintDebugInfoOpenJDK10boolruntimefalsedevelopPrint debug information for all nmethods when generatedsrc/share/vm/runtime/globals.hpp
PrintDeoptimizationDetailsOpenJDK10boolruntimefalsedevelopPrint more information about deoptimizationsrc/share/vm/runtime/globals.hpp
PrintDependenciesOpenJDK10boolruntimefalsedevelopPrint dependency information for all nmethods when generatedsrc/share/vm/runtime/globals.hpp
PrintDominatorsOpenJDK10boolc2falsedevelopPrint out dominator trees for GVNsrc/share/vm/opto/c2_globals.hpp
PrintEliminateAllocationsOpenJDK10boolc2falsenotproductPrint out when allocations are eliminatedsrc/share/vm/opto/c2_globals.hpp
PrintEliminateLocksOpenJDK10boolc2falsenotproductPrint out when locks are eliminatedsrc/share/vm/opto/c2_globals.hpp
PrintEscapeAnalysisOpenJDK10boolc2falsenotproductPrint the results of escape analysissrc/share/vm/opto/c2_globals.hpp
PrintExceptionHandlersOpenJDK10boolruntimefalsedevelopPrint exception handler tables for all nmethods when generatedsrc/share/vm/runtime/globals.hpp
PrintFieldLayoutOpenJDK10boolruntimefalsenotproductPrint field layout for each classsrc/share/vm/runtime/globals.hpp
PrintFlagsFinalOpenJDK10boolruntimefalseproductPrint all VM flags after argument and ergonomic processingsrc/share/vm/runtime/globals.hpp
PrintFlagsInitialOpenJDK10boolruntimefalseproductPrint all VM flags before argument processing and exit VMsrc/share/vm/runtime/globals.hpp
PrintFlagsRangesOpenJDK10boolruntimefalseproductPrint VM flags and their ranges and exit VMsrc/share/vm/runtime/globals.hpp
PrintFlagsWithCommentsOpenJDK10boolruntimefalsenotproductPrint all VM flags with default values and descriptions and exitsrc/share/vm/runtime/globals.hpp
PrintFrameConverterAssemblyOpenJDK10boolc2falsenotproductPrint New compiler assembly output for frame converterssrc/share/vm/opto/c2_globals.hpp
PrintGCDetailsOpenJDK10boolruntimefalseproductPrint more details at garbage collection. Deprecated, use -Xlog:gc* instead.src/share/vm/runtime/globals.hpp
PrintGCOpenJDK10boolruntimefalseproductPrint message at garbage collection. Deprecated, use -Xlog:gc instead.src/share/vm/runtime/globals.hpp
PrintHeapAtSIGBREAKOpenJDK10boolruntimetrueproductPrint heap layout in response to SIGBREAKsrc/share/vm/runtime/globals.hpp
PrintIR0OpenJDK10boolc1falsenotproductPrint full intermediate representation after constructionsrc/share/vm/c1/c1_globals.hpp
PrintIR1OpenJDK10boolc1falsenotproductPrint full intermediate representation after optimizationssrc/share/vm/c1/c1_globals.hpp
PrintIR2OpenJDK10boolc1falsenotproductPrint full intermediate representation before code generationsrc/share/vm/c1/c1_globals.hpp
PrintIRDuringConstructionOpenJDK10boolc1falsenotproductPrint IR as it's being constructed (helpful for debugging frontend)src/share/vm/c1/c1_globals.hpp
PrintIRWithLIROpenJDK10boolc1falsenotproductPrint IR instructions with generated LIRsrc/share/vm/c1/c1_globals.hpp
PrintIROpenJDK10boolc1falsenotproductPrint full intermediate representation after each changesrc/share/vm/c1/c1_globals.hpp
PrintIdealGraphAddressOpenJDK10ccstrc2127.0.0.1notproductIP address to connect to visualizersrc/share/vm/opto/c2_globals.hpp
PrintIdealGraphFileOpenJDK10ccstrc2NULLnotproductFile to dump ideal graph to. If set overrides the use of the networksrc/share/vm/opto/c2_globals.hpp
PrintIdealGraphLevelOpenJDK10intxc20
range(0, 4)
notproductLevel of detail of the ideal graph printout. System-wide value, 0=nothing is printed, 4=all details printed. Level of detail of printouts can be set on a per-method level as well by using CompileCommand=option.src/share/vm/opto/c2_globals.hpp
PrintIdealGraphPortOpenJDK10intxc24444
range(0, SHRT_MAX)
notproductIdeal graph printer to network portsrc/share/vm/opto/c2_globals.hpp
PrintIdealGraphOpenJDK10boolc2falsenotproductPrint ideal graph to XML file / network interface. By default attempts to connect to the visualizer on a socket.src/share/vm/opto/c2_globals.hpp
PrintIdealNodeCountOpenJDK10boolc2falsenotproductPrint liveness counts of ideal nodessrc/share/vm/opto/c2_globals.hpp
PrintIdealOpenJDK10boolc2falsenotproductPrint ideal graph before code generationsrc/share/vm/opto/c2_globals.hpp
PrintInitialBlockListOpenJDK10boolc1falsenotproductPrint block list of BlockListBuildersrc/share/vm/c1/c1_globals.hpp
PrintInliningOpenJDK10boolruntimefalsediagnosticPrint inlining optimizationssrc/share/vm/runtime/globals.hpp
PrintInterpreterOpenJDK10boolruntimefalsediagnosticPrint the generated interpreter codesrc/share/vm/runtime/globals.hpp
PrintIntrinsicsOpenJDK10boolc2falsediagnosticprints attempted and successful inlining of intrinsicssrc/share/vm/opto/c2_globals.hpp
PrintJNIResolvingOpenJDK10boolruntimefalseproductUsed to implement -v:jnisrc/share/vm/runtime/globals.hpp
PrintLIRWithAssemblyOpenJDK10boolc1falsenotproductShow LIR instruction with generated assemblysrc/share/vm/c1/c1_globals.hpp
PrintLIROpenJDK10boolc1falsedevelopprint low-level IRsrc/share/vm/c1/c1_globals.hpp
PrintLockStatisticsOpenJDK10boolc2falsenotproductPrint precise statistics on the dynamic lock usagesrc/share/vm/opto/c2_globals.hpp
PrintMallocFreeOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalsenotproductTrace calls to C heap malloc/free allocationsrc/share/vm/runtime/globals.hpp
PrintMallocStatisticsOpenJDK10boolruntimefalsedevelopPrint malloc/free statisticssrc/share/vm/runtime/globals.hpp
PrintMallocOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalsedevelopPrint all malloc/free callssrc/share/vm/runtime/globals.hpp
PrintMethodDataOpenJDK10boolruntimefalsediagnosticPrint the results of +ProfileInterpreter at end of runsrc/share/vm/runtime/globals.hpp
PrintMethodFlushingStatisticsOpenJDK10boolruntimefalsediagnosticprint statistics about method flushingsrc/share/vm/runtime/globals.hpp
PrintMethodFlushingOpenJDK10boolruntimefalsedevelopPrint the nmethods being flushedsrc/share/vm/runtime/globals.hpp
PrintMethodHandleStubsOpenJDK10boolruntimefalsediagnosticPrint generated stub code for method handlessrc/share/vm/runtime/globals.hpp
PrintMiscellaneousOpenJDK10boolruntimefalsedevelopPrint uncategorized debugging information (requires +Verbose)src/share/vm/runtime/globals.hpp
PrintNMTStatisticsOpenJDK10boolruntimefalsediagnosticPrint native memory tracking summary data if it is onsrc/share/vm/runtime/globals.hpp
PrintNMethodStatisticsOpenJDK10boolruntimefalsenotproductPrint a summary statistic for the generated nmethodssrc/share/vm/runtime/globals.hpp
PrintNMethodsOpenJDK10boolruntimefalsediagnosticPrint assembly code for nmethods when generatedsrc/share/vm/runtime/globals.hpp
PrintNativeNMethodsOpenJDK10boolruntimefalsediagnosticPrint assembly code for native nmethods when generatedsrc/share/vm/runtime/globals.hpp
PrintNotLoadedOpenJDK10boolc1falsedevelopPrints where classes are not loaded during code generationsrc/share/vm/c1/c1_globals.hpp
PrintNullCheckEliminationOpenJDK10boolc1falsedevelopPrint null check eliminationsrc/share/vm/c1/c1_globals.hpp
PrintOptimizePtrCompareOpenJDK10boolc2falsenotproductPrint information about optimized pointers comparesrc/share/vm/opto/c2_globals.hpp
PrintOptimizeStringConcatOpenJDK10boolc2falsenotproductPrint information about transformations performed on Stringssrc/share/vm/opto/c2_globals.hpp
PrintOptoAssemblyOpenJDK10boolc2falsediagnosticPrint New compiler assembly outputsrc/share/vm/opto/c2_globals.hpp
PrintOptoInliningOpenJDK10boolc2falsenotproductPrint compiler2 inlining decisionssrc/share/vm/opto/c2_globals.hpp
PrintOptoPeepholeOpenJDK10boolc2falsenotproductPrint New compiler peephole replacementssrc/share/vm/opto/c2_globals.hpp
PrintOptoStatisticsOpenJDK10boolc2falsenotproductPrint New compiler statisticssrc/share/vm/opto/c2_globals.hpp
PrintOptoOpenJDK10boolc2falsenotproductPrint compiler2 attemptssrc/share/vm/opto/c2_globals.hpp
PrintParseStatisticsOpenJDK10boolc2falsenotproductPrint nodes, transforms and new values made per bytecode parsedsrc/share/vm/opto/c2_globals.hpp
PrintPhiFunctionsOpenJDK10boolc1falsenotproductPrint phi functions when they are created and simplifiedsrc/share/vm/c1/c1_globals.hpp
PrintPreciseBiasedLockingStatisticsOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
boolc2falsediagnosticPrint per-lock-site statistics of biased locking in JVMsrc/share/vm/opto/c2_globals.hpp
PrintPreciseRTMLockingStatisticsOpenJDK10boolc2falsediagnosticPrint per-lock-site statistics of rtm locking in JVMsrc/share/vm/opto/c2_globals.hpp
PrintRelocationsOpenJDK10boolruntimefalsedevelopPrint relocation information for all nmethods when generatedsrc/share/vm/runtime/globals.hpp
PrintRewritesOpenJDK10boolruntimefalsenotproductPrint methods that are being rewrittensrc/share/vm/runtime/globals.hpp
PrintSafepointStatisticsCountOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
intxruntime300
range(1, max_intx)
productTotal number of safepoint statistics collected before printing them outsrc/share/vm/runtime/globals.hpp
PrintSafepointStatisticsTimeoutOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
intxruntime-1productPrint safepoint statistics only when safepoint takes more than PrintSafepointSatisticsTimeout in millissrc/share/vm/runtime/globals.hpp
PrintSafepointStatisticsOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproductPrint statistics about safepoint synchronizationsrc/share/vm/runtime/globals.hpp
PrintSharedArchiveAndExitOpenJDK10boolruntimefalseproductPrint shared archive file contentssrc/share/vm/runtime/globals.hpp
PrintSharedDictionaryOpenJDK10boolruntimefalseproductIf PrintSharedArchiveAndExit is true, also print the shared dictionarysrc/share/vm/runtime/globals.hpp
PrintSharedSpacesOpenJDK6boolruntimefalseproductPrint usage of shared spacessrc/share/vm/runtime/globals.hpp
PrintSignatureHandlersOpenJDK10boolruntimefalsediagnosticPrint code generated for native method signature handlerssrc/share/vm/runtime/globals.hpp
PrintSimpleStubsOpenJDK10boolc1falsenotproductPrint SimpleStubssrc/share/vm/c1/c1_globals.hpp
PrintStringTableStatisticsOpenJDK10boolruntimefalseproductprint statistics about the StringTable and SymbolTablesrc/share/vm/runtime/globals.hpp
PrintStubCodeOpenJDK10boolruntimefalsediagnosticPrint generated stub codesrc/share/vm/runtime/globals.hpp
PrintSymbolTableSizeHistogramOpenJDK10boolruntimefalsenotproductprint histogram of the symbol tablesrc/share/vm/runtime/globals.hpp
PrintSystemDictionaryAtExitOpenJDK10boolruntimefalsenotproductPrint the system dictionary at exitsrc/share/vm/runtime/globals.hpp
PrintTieredEventsOpenJDK10boolruntimefalseproductPrint tiered events notificationssrc/share/vm/runtime/globals.hpp
PrintTouchedMethodsAtExitOpenJDK10boolruntimefalsediagnosticPrint all methods that have been ever touched in runtimesrc/share/vm/runtime/globals.hpp
PrintUnsafeOptimizationOpenJDK10boolc1falsedevelopPrint optimization of raw unsafe opssrc/share/vm/c1/c1_globals.hpp
PrintVMMessagesOpenJDK10boolruntimetruedevelopPrint VM messages on consolesrc/share/vm/runtime/globals.hpp
PrintVMOptionsOpenJDK10boolruntimefalseproductPrint flags that appeared on the command linesrc/share/vm/runtime/globals.hpp
PrintVMQWaitTimeOpenJDK10Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproductPrint out the waiting time in VM operation queuesrc/share/vm/runtime/globals.hpp
PrintValueNumberingOpenJDK10boolc1falsedevelopPrint Value Numberingsrc/share/vm/c1/c1_globals.hpp
PrintVtableStatsOpenJDK10boolruntimefalsenotproductprint vtables stats at end of runsrc/share/vm/runtime/globals.hpp
PrintWarningsOpenJDK10boolruntimetrueproductPrint JVM warnings to output streamsrc/share/vm/runtime/globals.hpp
ProcessDistributionStrideOpenJDK10uintxruntime4
range(0, max_juint)
productStride through processors when distributing processessrc/share/vm/runtime/globals.hpp
ProfileDynamicTypesOpenJDK10boolc2truediagnosticdo extra type profiling and use it more aggressivelysrc/share/vm/opto/c2_globals.hpp
ProfileInterpreterOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
ProfileInterpreterOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
ProfileInterpreterOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
ProfileInterpreterOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
ProfileInterpreterOpenJDK10boolruntimeproduct_pdProfile at the bytecode level during interpretationsrc/share/vm/runtime/globals.hpp
ProfileInterpreterOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
ProfileInterpreterOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
ProfileInterpreterOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
ProfileInterpreterOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
ProfileInterpreterOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
ProfileInterpreterOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
ProfileInterpreterOpenJDK10boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
ProfileInterpreterOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
ProfileInterpreterOpenJDK10boolzerosharkfalsedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
ProfileIntervalsTicksOpenJDK10Obsoleted in JDK13
Expired in JDK14
intxruntime100
range(0, max_intx)
productNumber of ticks between printing of interval profile (+ProfileIntervals)src/share/vm/runtime/globals.hpp
ProfileIntervalsOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolruntimefalseproductPrint profiles for each interval (see ProfileIntervalsTicks)src/share/vm/runtime/globals.hpp
ProfileMaturityPercentageOpenJDK10intxruntime20
range(0, 100)
productnumber of method invocations/branches (expressed as % of CompileThreshold) before using the method's profilesrc/share/vm/runtime/globals.hpp
ProfileTrapsOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
ProfileTrapsOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
ProfileTrapsOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
ProfileTrapsOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
ProfileTrapsOpenJDK10boolruntimedevelop_pdProfile deoptimization traps at the bytecode levelsrc/share/vm/runtime/globals.hpp
ProfileTrapsOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
ProfileTrapsOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
ProfileTrapsOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
ProfileTrapsOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
ProfileTrapsOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
ProfileTrapsOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
ProfileTrapsOpenJDK10boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
ProfileTrapsOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
ProfileTrapsOpenJDK10boolzerosharkfalsedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
ProfileVMOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolruntimefalseproductProfile ticks that fall within VM (either in the VM Thread or VM code called through stubs)src/share/vm/runtime/globals.hpp
ProfiledCodeHeapSizeOpenJDK10intxaarch64c114*Mdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
ProfiledCodeHeapSizeOpenJDK10intxaarch64c222*Mdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
ProfiledCodeHeapSizeOpenJDK10size_tarmc114*Mdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
ProfiledCodeHeapSizeOpenJDK10size_tarmc214*Mdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
ProfiledCodeHeapSizeOpenJDK10uintxruntimeproduct_pdSize of code heap with profiled methods (in bytes)src/share/vm/runtime/globals.hpp
ProfiledCodeHeapSizeOpenJDK10intxppcc2126*Mdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
ProfiledCodeHeapSizeOpenJDK10uintxs390c114*Mdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
ProfiledCodeHeapSizeOpenJDK10uintxs390c222*Mdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
ProfiledCodeHeapSizeOpenJDK10intxsparcc114*Mdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
ProfiledCodeHeapSizeOpenJDK10intxsparcc214*Mdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
ProfiledCodeHeapSizeOpenJDK10intxx86c114*Mdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
ProfiledCodeHeapSizeOpenJDK10intxx86c222*Mdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
ProfiledCodeHeapSizeOpenJDK10intxzeroshark14*Mdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
ProfilerCheckIntervalsOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolruntimefalsenotproductCollect and print information on spacing of profiler tickssrc/share/vm/runtime/globals.hpp
ProfilerNodeSizeOpenJDK10intxruntime1024
range(0, 1024)
developSize in K to allocate for the Profile Nodes of each threadsrc/share/vm/runtime/globals.hpp
ProfilerNumberOfCompiledMethodsOpenJDK10Obsoleted in JDK13
Expired in JDK14
intxruntime25diagnosticNumber of compiled methods to show in profilesrc/share/vm/runtime/globals.hpp
ProfilerNumberOfInterpretedMethodsOpenJDK10Obsoleted in JDK13
Expired in JDK14
intxruntime25diagnosticNumber of interpreted methods to show in profilesrc/share/vm/runtime/globals.hpp
ProfilerNumberOfRuntimeStubNodesOpenJDK10Obsoleted in JDK13
Expired in JDK14
intxruntime25diagnosticNumber of runtime stub nodes to show in profilesrc/share/vm/runtime/globals.hpp
ProfilerNumberOfStubMethodsOpenJDK10Obsoleted in JDK13
Expired in JDK14
intxruntime25diagnosticNumber of stub methods to show in profilesrc/share/vm/runtime/globals.hpp
ProfilerPCTickThresholdOpenJDK10intxruntime15developNumber of ticks in a PC buckets to be a hotspotsrc/share/vm/runtime/globals.hpp
ProfilerPrintByteCodeStatisticsOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolruntimefalseproductPrint bytecode statistics when dumping profiler outputsrc/share/vm/runtime/globals.hpp
ProfilerRecordPCOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolruntimefalseproductCollect ticks for each 16 byte interval of compiled codesrc/share/vm/runtime/globals.hpp
PromotedPaddingOpenJDK10uintxruntime3
range(0, max_juint)
productHow much buffer to keep for promotion failuresrc/share/vm/runtime/globals.hpp
PromotionFailureALotCountOpenJDK10uintxruntime1000developNumber of promotion failures occurring at PLAB refill attempts (ParNew) or promotion attempts (other young collectors)src/share/vm/runtime/globals.hpp
PromotionFailureALotIntervalOpenJDK10uintxruntime5developTotal collections between promotion failures a lotsrc/share/vm/runtime/globals.hpp
PromotionFailureALotOpenJDK10boolruntimefalsenotproductUse promotion failure handling on every youngest generation collectionsrc/share/vm/runtime/globals.hpp
ProtectionDomainVerificationOpenJDK10boolruntimetruedevelopVerify protection domain before resolution in system dictionarysrc/share/vm/runtime/globals.hpp
QueuedAllocationWarningCountOpenJDK10uintxruntime0
range(0, max_uintx)
productNumber of times an allocation that queues behind a GC will retry before printing a warningsrc/share/vm/runtime/globals.hpp
RTMAbortRatioOpenJDK10intxppc50experimentalLock abort ratio at which to stop use RTM lock elidingsrc/cpu/ppc/vm/globals_ppc.hpp
RTMAbortRatioOpenJDK10intxx8650experimentalLock abort ratio at which to stop use RTM lock elidingsrc/cpu/x86/vm/globals_x86.hpp
RTMAbortThresholdOpenJDK10intxppc1000experimentalCalculate abort ratio after this number of abortssrc/cpu/ppc/vm/globals_ppc.hpp
RTMAbortThresholdOpenJDK10intxx861000experimentalCalculate abort ratio after this number of abortssrc/cpu/x86/vm/globals_x86.hpp
RTMLockingCalculationDelayOpenJDK10intxppc0experimentalNumber of milliseconds to wait before start calculating aborts for RTM lockingsrc/cpu/ppc/vm/globals_ppc.hpp
RTMLockingCalculationDelayOpenJDK10intxx860experimentalNumber of milliseconds to wait before start calculating aborts for RTM lockingsrc/cpu/x86/vm/globals_x86.hpp
RTMLockingThresholdOpenJDK10intxppc10000experimentalLock count at which to do RTM lock eliding without abort ratio calculationsrc/cpu/ppc/vm/globals_ppc.hpp
RTMLockingThresholdOpenJDK10intxx8610000experimentalLock count at which to do RTM lock eliding without abort ratio calculationsrc/cpu/x86/vm/globals_x86.hpp
RTMRetryCountOpenJDK10uintxppc5productNumber of RTM retries on lock abort or busysrc/cpu/ppc/vm/globals_ppc.hpp
RTMRetryCountOpenJDK10uintxx865
range(0, max_uintx)
productNumber of RTM retries on lock abort or busysrc/cpu/x86/vm/globals_x86.hpp
RTMSpinLoopCountOpenJDK10intxppc100experimentalSpin count for lock to become free before RTM retrysrc/cpu/ppc/vm/globals_ppc.hpp
RTMSpinLoopCountOpenJDK10intxx86100experimentalSpin count for lock to become free before RTM retrysrc/cpu/x86/vm/globals_x86.hpp
RTMTotalCountIncrRateOpenJDK10intxppc64experimentalIncrement total RTM attempted lock count once every n timessrc/cpu/ppc/vm/globals_ppc.hpp
RTMTotalCountIncrRateOpenJDK10intxx8664experimentalIncrement total RTM attempted lock count once every n timessrc/cpu/x86/vm/globals_x86.hpp
RangeCheckEliminationOpenJDK10boolruntimetrueproductEliminate range checkssrc/share/vm/runtime/globals.hpp
ReassociateInvariantsOpenJDK10boolc2trueproductEnable reassociation of expressions with loop invariants.src/share/vm/opto/c2_globals.hpp
ReduceBulkZeroingOpenJDK10boolc2trueproductWhen bulk-initializing, try to avoid needless zeroingsrc/share/vm/opto/c2_globals.hpp
ReduceFieldZeroingOpenJDK10boolc2trueproductWhen initializing fields, try to avoid needless zeroingsrc/share/vm/opto/c2_globals.hpp
ReduceInitialCardMarksOpenJDK10boolc2trueproductWhen initializing fields, try to avoid needless card markssrc/share/vm/opto/c2_globals.hpp
ReduceSignalUsageOpenJDK10boolruntimefalseproductReduce the use of OS signals in Java and/or the VMsrc/share/vm/runtime/globals.hpp
RefDiscoveryPolicyOpenJDK10intxruntime0
range(ReferenceProcessor::DiscoveryPolicyMin,
productSelect type of reference discovery policy: reference-based(0) or referent-based(1)src/share/vm/runtime/globals.hpp
RegisterCostAreaRatioOpenJDK10intxaarch64c216000define_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
RegisterCostAreaRatioOpenJDK10intxarmc216000define_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
RegisterCostAreaRatioOpenJDK10intxc2develop_pdSpill selection in reg allocator: scale area by (X/64K) before adding costsrc/share/vm/opto/c2_globals.hpp
RegisterCostAreaRatioOpenJDK10intxppcc216000define_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
RegisterCostAreaRatioOpenJDK10intxs390c212000define_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
RegisterCostAreaRatioOpenJDK10intxsparcc212000define_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
RegisterCostAreaRatioOpenJDK10intxx86c216000define_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
RegisterFinalizersAtInitOpenJDK10boolruntimetrueproductRegister finalizable objects at end of Object.<init> or after allocationsrc/share/vm/runtime/globals.hpp
RegisterReferencesOpenJDK10boolruntimetruedevelopTell whether the VM should register soft/weak/final/phantom referencessrc/share/vm/runtime/globals.hpp
RelaxAccessControlCheckOpenJDK10boolruntimefalseproductRelax the access control checks in the verifiersrc/share/vm/runtime/globals.hpp
RenumberLiveNodesOpenJDK10boolc2truedevelopRenumber live nodessrc/share/vm/opto/c2_globals.hpp
ReoptimizeCallSequencesOpenJDK10boolppctrueproductReoptimize code-sequences of calls at runtime.src/cpu/ppc/vm/globals_ppc.hpp
ReoptimizeCallSequencesOpenJDK10bools390trueproductReoptimize code-sequences of calls at runtime.src/cpu/s390/vm/globals_s390.hpp
ReplayCompilesOpenJDK10boolruntimefalsedevelopEnable replay of compilations from ReplayDataFilesrc/share/vm/runtime/globals.hpp
ReplayDataFileOpenJDK10ccstrruntimeNULLproductFile containing compilation replay information[default: ./replay_pid%p.log] (%p replaced with pid)src/share/vm/runtime/globals.hpp
ReplayIgnoreInitErrorsOpenJDK10boolruntimefalsedevelopIgnore exceptions thrown during initialization for replaysrc/share/vm/runtime/globals.hpp
ReplaySuppressInitializersOpenJDK10intxruntime2
range(0, 3)
developControl handling of class initialization during replay:
0 - don't do anything special;
1 - treat all class initializers as empty;
2 - treat class initializers for application classes as empty;
3 - allow all class initializers to run during bootstrap but pretend they are empty after starting replay
src/share/vm/runtime/globals.hpp
RequireSharedSpacesOpenJDK10boolruntimefalseproductRequire shared spaces for metadatasrc/share/vm/runtime/globals.hpp
ReservedCodeCacheSizeOpenJDK10intxaarch64c132*Mdefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
ReservedCodeCacheSizeOpenJDK10intxaarch64c248*Mdefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
ReservedCodeCacheSizeOpenJDK10size_tarmc132*Mdefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
ReservedCodeCacheSizeOpenJDK10size_tarmc232*Mdefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
ReservedCodeCacheSizeOpenJDK10uintxruntimeproduct_pdReserved code cache size (in bytes) - maximum code cache sizesrc/share/vm/runtime/globals.hpp
ReservedCodeCacheSizeOpenJDK10intxppcc132*Mdefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
ReservedCodeCacheSizeOpenJDK10intxppcc2256*Mdefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
ReservedCodeCacheSizeOpenJDK10intxs390c132*Mdefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
ReservedCodeCacheSizeOpenJDK10uintxs390c248*Mdefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
ReservedCodeCacheSizeOpenJDK10intxsparcc132*Mdefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
ReservedCodeCacheSizeOpenJDK10intxsparcc232*Mdefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
ReservedCodeCacheSizeOpenJDK10intxx86c132*Mdefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
ReservedCodeCacheSizeOpenJDK10intxx86c248*Mdefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
ReservedCodeCacheSizeOpenJDK10intxzeroshark32*Mdefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
ResizeOldPLABOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductDynamically resize (old gen) promotion LAB'ssrc/share/vm/runtime/globals.hpp
ResizePLABOpenJDK10boolruntimetrueproductDynamically resize (survivor space) promotion LAB'ssrc/share/vm/runtime/globals.hpp
ResizeTLABOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
ResizeTLABOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
ResizeTLABOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
ResizeTLABOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
ResizeTLABOpenJDK10boolruntimeproduct_pdDynamically resize TLAB size for threadssrc/share/vm/runtime/globals.hpp
ResizeTLABOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
ResizeTLABOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
ResizeTLABOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
ResizeTLABOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
ResizeTLABOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
ResizeTLABOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
ResizeTLABOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
ResizeTLABOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
ResizeTLABOpenJDK10boolzerosharktruedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
RestoreMXCSROnJNICallsOpenJDK10boolruntimefalseproductRestore MXCSR when returning from JNI callssrc/share/vm/runtime/globals.hpp
RestrictContendedOpenJDK10boolruntimetrueproductRestrict @Contended to trusted classessrc/share/vm/runtime/globals.hpp
RestrictReservedStackOpenJDK10boolruntimetrueproductRestrict @ReservedStackAccess to trusted classessrc/share/vm/runtime/globals.hpp
RewriteBytecodesOpenJDK10boolaarch64truedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
RewriteBytecodesOpenJDK10boolarmtruedefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
RewriteBytecodesOpenJDK10boolruntimeproduct_pdAllow rewriting of bytecodes (bytecodes are not immutable)src/share/vm/runtime/globals.hpp
RewriteBytecodesOpenJDK10boolppctruedefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
RewriteBytecodesOpenJDK10bools390truedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
RewriteBytecodesOpenJDK10boolsparctruedefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
RewriteBytecodesOpenJDK10boolx86truedefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
RewriteBytecodesOpenJDK10boolzerotruedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
RewriteFrequentPairsOpenJDK10boolaarch64truedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
RewriteFrequentPairsOpenJDK10boolarmtruedefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
RewriteFrequentPairsOpenJDK10boolruntimeproduct_pdRewrite frequently used bytecode pairs into a single bytecodesrc/share/vm/runtime/globals.hpp
RewriteFrequentPairsOpenJDK10boolppctruedefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
RewriteFrequentPairsOpenJDK10bools390truedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
RewriteFrequentPairsOpenJDK10boolsparctruedefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
RewriteFrequentPairsOpenJDK10boolx86truedefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
RewriteFrequentPairsOpenJDK10boolzerotruedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
RoundFPResultsOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
RoundFPResultsOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
RoundFPResultsOpenJDK10boolc1develop_pdIndicates whether rounding is needed for floating point resultssrc/share/vm/c1/c1_globals.hpp
RoundFPResultsOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
RoundFPResultsOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
RoundFPResultsOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
RoundFPResultsOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
SafepointALotOpenJDK10boolruntimefalsedevelopGenerate a lot of safepoints. This works with GuaranteedSafepointIntervalsrc/share/vm/runtime/globals.hpp
SafepointPollOffsetOpenJDK6intxaarch64c10define_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
SafepointSpinBeforeYieldOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
intxruntime2000
range(0, max_intx)
product(Unstable)src/share/vm/runtime/globals.hpp
SafepointTimeoutDelayOpenJDK10intxruntime10000productDelay in milliseconds for option SafepointTimeoutsrc/share/vm/runtime/globals.hpp
SafepointTimeoutOpenJDK10boolruntimefalseproductTime out and warn or fail after SafepointTimeoutDelay milliseconds if failed to reach safepointsrc/share/vm/runtime/globals.hpp
ScavengeALotIntervalOpenJDK10intxruntime1notproductInterval between which scavenge will occur with +ScavengeALotsrc/share/vm/runtime/globals.hpp
ScavengeALotOpenJDK10boolruntimefalsenotproductForce scavenge at every Nth exit from the runtime system (N=ScavengeALotInterval)src/share/vm/runtime/globals.hpp
ScavengeBeforeFullGCOpenJDK10boolruntimetrueproductScavenge youngest generation before each full GC.src/share/vm/runtime/globals.hpp
ScavengeRootsInCodeOpenJDK10intxruntime2
range(0, 2)
diagnostic0: do not allow scavengable oops in the code cache;
1: allow scavenging from the code cache;
2: emit as many constants as the compiler can see
src/share/vm/runtime/globals.hpp
SegmentedCodeCacheOpenJDK10boolruntimefalseproductUse a segmented code cachesrc/share/vm/runtime/globals.hpp
SelectivePhiFunctionsOpenJDK10boolc1truedevelopcreate phi functions at loop headers only when necessarysrc/share/vm/c1/c1_globals.hpp
SelfDestructTimerOpenJDK10intxruntime0
range(0, max_intx)
productWill cause VM to terminate after a given time (in minutes) (0 means off)src/share/vm/runtime/globals.hpp
SerializeVMOutputOpenJDK10boolruntimetruediagnosticUse a mutex to serialize output to tty and LogFilesrc/share/vm/runtime/globals.hpp
ShareVtableStubsOpenJDK10boolaarch64truedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
ShareVtableStubsOpenJDK10boolarmtruedefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
ShareVtableStubsOpenJDK10boolruntimedevelop_pdShare vtable stubs (smaller code but worse branch predictionsrc/share/vm/runtime/globals.hpp
ShareVtableStubsOpenJDK10boolppcfalsedefine_pd_global// Improves performance markedly for mtrt and compress.src/cpu/ppc/vm/globals_ppc.hpp
ShareVtableStubsOpenJDK10bools390falsedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
ShareVtableStubsOpenJDK10boolsparcfalsedefine_pd_global// improves performance markedly for mtrt and compresssrc/cpu/sparc/vm/globals_sparc.hpp
ShareVtableStubsOpenJDK10boolx86truedefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
ShareVtableStubsOpenJDK10boolzerotruedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
SharedArchiveFileOpenJDK10ccstrruntimeNULLdiagnosticOverride the default location of the CDS archive filesrc/share/vm/runtime/globals.hpp
SharedBaseAddressOpenJDK10size_truntimeLP64_ONLY(32*G)NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0))
range(0, SIZE_MAX)
productAddress to allocate shared memory region for class datasrc/share/vm/runtime/globals.hpp
SharedClassListFileOpenJDK10ccstrruntimeNULLproductOverride the default CDS class listsrc/share/vm/runtime/globals.hpp
SharedMiscCodeSizeOpenJDK6Obsoleted in JDK10size_truntimeDEFAULT_SHARED_MISC_CODE_SIZE
range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE)
productSize of the shared miscellaneous code area (in bytes)src/share/vm/runtime/globals.hpp
SharedMiscDataSizeOpenJDK6Obsoleted in JDK10size_truntimeDEFAULT_SHARED_MISC_DATA_SIZE
range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE)
productSize of the shared miscellaneous data area (in bytes)src/share/vm/runtime/globals.hpp
SharedReadOnlySizeOpenJDK6Obsoleted in JDK10size_truntimeDEFAULT_SHARED_READ_ONLY_SIZE
range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE)
productSize of read-only space for metadata (in bytes)src/share/vm/runtime/globals.hpp
SharedReadWriteSizeOpenJDK6Obsoleted in JDK10size_truntimeDEFAULT_SHARED_READ_WRITE_SIZE
range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE)
productSize of read-write space for metadata (in bytes)src/share/vm/runtime/globals.hpp
SharedSymbolTableBucketSizeOpenJDK10uintxruntime4
range(2, 246)
productAverage number of symbols per bucket in shared tablesrc/share/vm/runtime/globals.hpp
SharkMaxInlineSizeOpenJDK6intxshark32productMaximum bytecode size of methods to inline when using Sharksrc/share/vm/shark/shark_globals.hpp
SharkOptimizationLevelOpenJDK8ccstrsharkDefaultproductThe optimization level passed to LLVM, possible values: None, Less, Default and Agressivesrc/share/vm/shark/shark_globals.hpp
SharkPerformanceWarningsOpenJDK6boolsharkfalsediagnosticWarn about things that could be made fastersrc/share/vm/shark/shark_globals.hpp
SharkPrintAsmOfOpenJDK6ccstrsharkNULLdiagnosticPrint the asm of the specified methodsrc/share/vm/shark/shark_globals.hpp
SharkPrintBitcodeOfOpenJDK6ccstrsharkNULLdiagnosticPrint the LLVM bitcode of the specified methodsrc/share/vm/shark/shark_globals.hpp
SharkPrintTypeflowOfOpenJDK6ccstrsharkNULLdevelopPrint the typeflow of the specified methodsrc/share/vm/shark/shark_globals.hpp
SharkTraceBytecodesOpenJDK6boolsharkfalsedevelopTrace bytecode compilationsrc/share/vm/shark/shark_globals.hpp
SharkTraceInstallsOpenJDK6boolsharkfalsediagnosticTrace method installationsrc/share/vm/shark/shark_globals.hpp
SharkVerifyFunctionOpenJDK8ccstrsharkNULLdevelopRuns LLVM verify over LLVM IRsrc/share/vm/shark/shark_globals.hpp
ShowHiddenFramesOpenJDK10boolruntimefalsediagnosticshow method handle implementation frames (usually hidden)src/share/vm/runtime/globals.hpp
ShowMessageBoxOnErrorOpenJDK10boolruntimefalseproductKeep process alive on VM fatal errorsrc/share/vm/runtime/globals.hpp
ShowSafepointMsgsOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalsedevelopShow message about safepoint synchronizationsrc/share/vm/runtime/globals.hpp
ShrinkHeapInStepsOpenJDK10boolruntimetrueproductWhen disabled, informs the GC to shrink the java heap directly to the target size at the next full GC rather than requiring smaller steps during multiple full GCs.src/share/vm/runtime/globals.hpp
SoftMatchFailureOpenJDK10boolc2trueInProductdevelopIf the DFA fails to match a node, print a message and bail outsrc/share/vm/opto/c2_globals.hpp
SoftRefLRUPolicyMSPerMBOpenJDK10intxruntime1000
range(0, max_intx)
productNumber of milliseconds per MB of free space in the heapsrc/share/vm/runtime/globals.hpp
SparcV9RegsHiBitsZeroOpenJDK10boolc2truedevelopAssume Sparc V9 I&L registers on V8+ systems are zero-extendedsrc/share/vm/opto/c2_globals.hpp
SpecTrapLimitExtraEntriesOpenJDK10intxruntime3experimentalExtra method data trap entries for speculationsrc/share/vm/runtime/globals.hpp
SpecialArraysEqualsOpenJDK10boolc2truediagnosticspecial version of Arrays.equals(char[],char[])src/share/vm/opto/c2_globals.hpp
SpecialEncodeISOArrayOpenJDK10boolc2truediagnosticspecial version of ISO_8859_1$Encoder.encodeISOArraysrc/share/vm/opto/c2_globals.hpp
SpecialStringCompareToOpenJDK10boolc2truediagnosticspecial version of string compareTosrc/share/vm/opto/c2_globals.hpp
SpecialStringEqualsOpenJDK10boolc2truediagnosticspecial version of string equalssrc/share/vm/opto/c2_globals.hpp
SpecialStringIndexOfOpenJDK10boolc2truediagnosticspecial version of string indexOfsrc/share/vm/opto/c2_globals.hpp
SplitIfBlocksOpenJDK10boolc2trueproductClone compares and control flow through merge points to fold some branchessrc/share/vm/opto/c2_globals.hpp
StackPrintLimitOpenJDK10intxruntime100developnumber of stack frames to print in VM-level stack dumpsrc/share/vm/runtime/globals.hpp
StackRedPagesOpenJDK10intxaarch64DEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
StackRedPagesOpenJDK10intxarmDEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
StackRedPagesOpenJDK10intxruntimeproduct_pdNumber of red zone (unrecoverable overflows) pages of size
4KB. If pages are bigger red zone is aligned up.
src/share/vm/runtime/globals.hpp
StackRedPagesOpenJDK10intxppcDEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
StackRedPagesOpenJDK10intxs390DEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
StackRedPagesOpenJDK10intxsparcDEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
StackRedPagesOpenJDK10intxx86DEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
StackRedPagesOpenJDK10intxzeroDEFAULT_STACK_RED_PAGESdefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
StackReservedPagesOpenJDK10intxaarch64DEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
StackReservedPagesOpenJDK10intxarmDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
StackReservedPagesOpenJDK10intxruntimeproduct_pdNumber of reserved zone (reserved to annotated methods) pages of size 4KB. If pages are bigger reserved zone is aligned up.src/share/vm/runtime/globals.hpp
StackReservedPagesOpenJDK10intxppcDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
StackReservedPagesOpenJDK10intxs390DEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
StackReservedPagesOpenJDK10intxsparcDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
StackReservedPagesOpenJDK10intxx86DEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
StackReservedPagesOpenJDK10intxzeroDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
StackShadowPagesOpenJDK10intxaarch64DEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
StackShadowPagesOpenJDK10intxarmDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
StackShadowPagesOpenJDK10intxruntimeproduct_pdNumber of shadow zone (for overflow checking) pages of size
4KB. If pages are bigger shadow zone is aligned up. This should exceed the depth of the VM and native call stack.
src/share/vm/runtime/globals.hpp
StackShadowPagesOpenJDK10intxppcDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
StackShadowPagesOpenJDK10intxs390DEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
StackShadowPagesOpenJDK10intxsparcDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
StackShadowPagesOpenJDK10intxx86DEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
StackShadowPagesOpenJDK10intxzeroDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
StackTraceInThrowableOpenJDK10boolruntimetrueproductCollect backtrace in throwable when exception happenssrc/share/vm/runtime/globals.hpp
StackYellowPagesOpenJDK10intxaarch64DEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
StackYellowPagesOpenJDK10intxarmDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
StackYellowPagesOpenJDK10intxruntimeproduct_pdNumber of yellow zone (recoverable overflows) pages of size
4KB. If pages are bigger yellow zone is aligned up.
src/share/vm/runtime/globals.hpp
StackYellowPagesOpenJDK10intxppcDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
StackYellowPagesOpenJDK10intxs390DEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
StackYellowPagesOpenJDK10intxsparcDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
StackYellowPagesOpenJDK10intxx86DEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
StackYellowPagesOpenJDK10intxzeroDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
StartAggressiveSweepingAtOpenJDK10uintxruntime10
range(0, 100)
productStart aggressive sweeping if X[%] of the code cache is free.Segmented code cache: X[%] of the non-profiled heap.Non-segmented code cache: X[%] of the total code cachesrc/share/vm/runtime/globals.hpp
StartAttachListenerOpenJDK10boolruntimefalseproductAlways start Attach Listener at VM startupsrc/share/vm/runtime/globals.hpp
StopInterpreterAtOpenJDK10intxruntime0developStop interpreter execution at specified bytecode numbersrc/share/vm/runtime/globals.hpp
StressArrayCopyMacroNodeOpenJDK10boolc2falsedevelopPerform ArrayCopy load/store replacement during IGVN onlysrc/share/vm/opto/c2_globals.hpp
StressCodeAgingOpenJDK10boolruntimefalsediagnosticStart with counters compiled insrc/share/vm/runtime/globals.hpp
StressCodeBuffersOpenJDK10boolruntimefalsedevelopExercise code buffer expansion and other rare state changessrc/share/vm/runtime/globals.hpp
StressCompiledExceptionHandlersOpenJDK10boolruntimefalsedevelopExercise compiled exception handlerssrc/share/vm/runtime/globals.hpp
StressCriticalJNINativesOpenJDK10boolruntimefalsenotproductExercise register saving code in critical nativessrc/share/vm/runtime/globals.hpp
StressDerivedPointersOpenJDK10boolruntimefalsenotproductForce scavenge when a derived pointer is detected on stack after rtm callsrc/share/vm/runtime/globals.hpp
StressGCMOpenJDK10boolc2falsediagnosticRandomize instruction scheduling in GCMsrc/share/vm/opto/c2_globals.hpp
StressLCMOpenJDK10boolc2falsediagnosticRandomize instruction scheduling in LCMsrc/share/vm/opto/c2_globals.hpp
StressLdcRewriteOpenJDK10boolruntimefalseproductForce ldc -> ldc_w rewrite during RedefineClassessrc/share/vm/runtime/globals.hpp
StressLinearScanOpenJDK10boolc1falsedevelopscramble block order used by LinearScan (stress test)src/share/vm/c1/c1_globals.hpp
StressLoopInvariantCodeMotionOpenJDK10boolc1falsedevelopstress loop invariant code motionsrc/share/vm/c1/c1_globals.hpp
StressRangeCheckEliminationOpenJDK10boolc1falsedevelopstress Range Check Eliminationsrc/share/vm/c1/c1_globals.hpp
StressRecompilationOpenJDK10boolc2falsedevelopRecompile each compiled method without subsuming loads or escape analysis.src/share/vm/opto/c2_globals.hpp
StressReflectiveCodeOpenJDK10boolc2falsedevelopUse inexact types at allocations, etc., to test reflectionsrc/share/vm/opto/c2_globals.hpp
StressRewriterOpenJDK10boolruntimefalsedevelopStress linktime bytecode rewritingsrc/share/vm/runtime/globals.hpp
StrictSafepointChecksOpenJDK10boolruntimetrueInDebugnotproductEnable strict checks that safepoints cannot happen for threads that use NoSafepointVerifiersrc/share/vm/runtime/globals.hpp
StringDeduplicationAgeThresholdOpenJDK10uintxruntime3
range(1, markOopDesc::max_age)
productA string must reach this age (or be promoted to an old region) to be considered for deduplicationsrc/share/vm/runtime/globals.hpp
StringDeduplicationRehashALotOpenJDK10boolruntimefalsediagnosticForce table rehash every time the table is scannedsrc/share/vm/runtime/globals.hpp
StringDeduplicationResizeALotOpenJDK10boolruntimefalsediagnosticForce table resize every time the table is scannedsrc/share/vm/runtime/globals.hpp
StringTableSizeOpenJDK10uintxruntimedefaultStringTableSize
range(minimumStringTableSize, 111*defaultStringTableSize)
productNumber of buckets in the interned String tablesrc/share/vm/runtime/globals.hpp
SubsumeLoadsOpenJDK10boolc2truedevelopAttempt to compile while subsuming loads into machine instructions.src/share/vm/opto/c2_globals.hpp
SuperWordLoopUnrollAnalysisOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
SuperWordLoopUnrollAnalysisOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
SuperWordLoopUnrollAnalysisOpenJDK10boolc2product_pdMap number of unrolls for main loop via Superword Level Parallelism analysissrc/share/vm/opto/c2_globals.hpp
SuperWordLoopUnrollAnalysisOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
SuperWordLoopUnrollAnalysisOpenJDK10bools390c2falsedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
SuperWordLoopUnrollAnalysisOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
SuperWordLoopUnrollAnalysisOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
SuperWordRTDepCheckOpenJDK10boolc2falsedevelopEnable runtime dependency checks.src/share/vm/opto/c2_globals.hpp
SuperWordReductionsOpenJDK10boolc2trueproductEnable reductions support in superword.src/share/vm/opto/c2_globals.hpp
SuppressErrorAtOpenJDK10ccstrlistruntimeList of assertions (file:line) to muzzlenotproductsrc/share/vm/runtime/globals.hpp
SuppressFatalErrorMessageOpenJDK10boolruntimefalseproductReport NO fatal error message (avoid deadlock)src/share/vm/runtime/globals.hpp
SurvivorAlignmentInBytesOpenJDK10intxruntime0experimentalDefault survivor space alignment in bytessrc/share/vm/runtime/globals.hpp
SurvivorPaddingOpenJDK10uintxruntime3
range(0, max_juint)
productHow much buffer to keep for survivor overflowsrc/share/vm/runtime/globals.hpp
SurvivorRatioOpenJDK10uintxruntime8
range(1, max_uintx-2)
productRatio of eden/survivor space sizesrc/share/vm/runtime/globals.hpp
SuspendRetryCountOpenJDK10intxruntime50
range(0, max_intx)
productMaximum retry count for an external suspend requestsrc/share/vm/runtime/globals.hpp
SuspendRetryDelayOpenJDK10intxruntime5
range(0, max_intx)
productMilliseconds to delay per retry (* current_retry_count)src/share/vm/runtime/globals.hpp
SweeperLogEntriesOpenJDK10intxruntime1024notproductNumber of records in the ring buffer of sweeper activitysrc/share/vm/runtime/globals.hpp
SymbolTableSizeOpenJDK10uintxruntimedefaultSymbolTableSize
range(minimumSymbolTableSize, 111*defaultSymbolTableSize)
experimentalNumber of buckets in the JVM internal Symbol tablesrc/share/vm/runtime/globals.hpp
SyncFlagsOpenJDK10Obsoleted in JDK12
Expired in JDK13
intxruntime0experimental(Unsafe, Unstable) Experimental Sync flagssrc/share/vm/runtime/globals.hpp
SyncKnobsOpenJDK10Obsoleted in JDK12
Expired in JDK13
ccstrruntimeNULLexperimental(Unstable) Various monitor synchronization tunablessrc/share/vm/runtime/globals.hpp
SyncVerboseOpenJDK10Obsoleted in JDK12
Expired in JDK13
intxruntime0experimental(Unstable)src/share/vm/runtime/globals.hpp
TLABAllocationWeightOpenJDK10uintxruntime35
range(0, 100)
productAllocation averaging weightsrc/share/vm/runtime/globals.hpp
TLABRefillWasteFractionOpenJDK10uintxruntime64
range(1, max_juint)
productMaximum TLAB waste at a refill (internal fragmentation)src/share/vm/runtime/globals.hpp
TLABSizeOpenJDK10size_truntime0productStarting TLAB size (in bytes); zero means set ergonomicallysrc/share/vm/runtime/globals.hpp
TLABStatsOpenJDK10Deprecated in JDK12boolruntimetrueproductProvide more detailed and expensive TLAB statistics.src/share/vm/runtime/globals.hpp
TLABWasteIncrementOpenJDK10uintxruntime4
range(0, max_jint)
productIncrement allowed waste at slow allocationsrc/share/vm/runtime/globals.hpp
TLABWasteTargetPercentOpenJDK10uintxruntime1
range(1, 100)
productPercentage of Eden that can be wastedsrc/share/vm/runtime/globals.hpp
TargetPLABWastePctOpenJDK10uintxruntime10
range(1, 100)
productTarget wasted space in last buffer as percent of overall allocationsrc/share/vm/runtime/globals.hpp
TargetSurvivorRatioOpenJDK10uintxruntime50
range(0, 100)
productDesired percentage of survivor space used after scavengesrc/share/vm/runtime/globals.hpp
TenuredGenerationSizeIncrementOpenJDK10uintxruntime20
range(0, 100)
productAdaptive size percentage change in tenured generationsrc/share/vm/runtime/globals.hpp
TenuredGenerationSizeSupplementDecayOpenJDK10uintxruntime2
range(1, max_uintx)
productDecay factor to TenuredGenerationSizeIncrementsrc/share/vm/runtime/globals.hpp
TenuredGenerationSizeSupplementOpenJDK10uintxruntime80
range(0, 100)
productSupplement to TenuredGenerationSizeIncrement used at startupsrc/share/vm/runtime/globals.hpp
TestCrashInErrorHandlerOpenJDK10uintxruntime0notproductIf > 0, provokes an error inside VM error handler (a secondary crash). see test_error_handler() in debug.cpp.src/share/vm/runtime/globals.hpp
TestSafeFetchInErrorHandlerOpenJDK10boolruntimefalsenotproductIf true, tests SafeFetch inside error handler.src/share/vm/runtime/globals.hpp
ThreadPriorityPolicyOpenJDK10intxruntime0
range(0, 1)
product0 : Normal. VM chooses priorities that are appropriate for normal applications. On Solaris NORM_PRIORITY and above are mapped to normal native priority. Java priorities below NORM_PRIORITY map to lower native priority values. On Windows applications are allowed to use higher native priorities. However, with ThreadPriorityPolicy=0, VM will not use the highest possible native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with system threads. On Linux thread priorities are ignored because the OS does not support static priority in SCHED_OTHER scheduling class which is the only choice for non-root, non-realtime applications.
1 : Aggressive. Java thread priorities map over to the entire range of native thread priorities. Higher Java thread priorities map to higher native thread priorities. This policy should be used with care, as sometimes it can cause performance degradation in the application and/or the entire system. On Linux this policy requires root privilege.
src/share/vm/runtime/globals.hpp
ThreadPriorityVerboseOpenJDK10boolruntimefalseproductPrint priority changessrc/share/vm/runtime/globals.hpp
ThreadStackSizeOpenJDK10intxaixppc2048define_pd_global// 0 => use system defaultsrc/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp
ThreadStackSizeOpenJDK10intxbsdx86320define_pd_globalsrc/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp
ThreadStackSizeOpenJDK10intxbsdzero1536define_pd_globalsrc/os_cpu/bsd_zero/vm/globals_bsd_zero.hpp
ThreadStackSizeOpenJDK10intxlinuxaarch642048define_pd_global// 0 => use system defaultsrc/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp
ThreadStackSizeOpenJDK10intxlinuxarm320define_pd_globalsrc/os_cpu/linux_arm/vm/globals_linux_arm.hpp
ThreadStackSizeOpenJDK10intxlinuxppc2048define_pd_global// 0 => use system defaultsrc/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp
ThreadStackSizeOpenJDK10intxlinuxs3901024define_pd_global// 0 => Use system default.src/os_cpu/linux_s390/vm/globals_linux_s390.hpp
ThreadStackSizeOpenJDK10intxlinuxx86320define_pd_globalsrc/os_cpu/linux_x86/vm/globals_linux_x86.hpp
ThreadStackSizeOpenJDK10intxlinuxzero1536define_pd_globalsrc/os_cpu/linux_zero/vm/globals_linux_zero.hpp
ThreadStackSizeOpenJDK10intxruntimeproduct_pdThread Stack Size (in Kbytes)src/share/vm/runtime/globals.hpp
ThreadStackSizeOpenJDK10intxsparc512define_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
ThreadStackSizeOpenJDK10intxsolarisx86320define_pd_globalsrc/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp
ThreadStackSizeOpenJDK10intxwindowsx860define_pd_global// 0 => use system defaultsrc/os_cpu/windows_x86/vm/globals_windows_x86.hpp
ThresholdToleranceOpenJDK10uintxruntime10
range(0, 100)
productAllowed collection cost difference between generationssrc/share/vm/runtime/globals.hpp
Tier0BackedgeNotifyFreqLogOpenJDK10intxruntime10
range(0, 30)
productInterpreter (tier 0) invocation notification frequencysrc/share/vm/runtime/globals.hpp
Tier0InvokeNotifyFreqLogOpenJDK10intxruntime7
range(0, 30)
productInterpreter (tier 0) invocation notification frequencysrc/share/vm/runtime/globals.hpp
Tier0ProfilingStartPercentageOpenJDK10intxruntime200
range(0, max_jint)
productStart profiling in interpreter if the counters exceed tier 3 thresholds by the specified percentagesrc/share/vm/runtime/globals.hpp
Tier23InlineeNotifyFreqLogOpenJDK10intxruntime20
range(0, 30)
productInlinee invocation (tiers 2 and 3) notification frequencysrc/share/vm/runtime/globals.hpp
Tier2BackEdgeThresholdOpenJDK10intxruntime0
range(0, max_jint)
productBack edge threshold at which tier 2 compilation is invokedsrc/share/vm/runtime/globals.hpp
Tier2BackEdgeThresholdOpenJDK10intxzeroshark100000define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
Tier2BackedgeNotifyFreqLogOpenJDK10intxruntime14
range(0, 30)
productC1 without MDO (tier 2) invocation notification frequencysrc/share/vm/runtime/globals.hpp
Tier2CompileThresholdOpenJDK10intxruntime0
range(0, max_jint)
productthreshold at which tier 2 compilation is invokedsrc/share/vm/runtime/globals.hpp
Tier2CompileThresholdOpenJDK10intxzeroshark1500define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
Tier2InvokeNotifyFreqLogOpenJDK10intxruntime11
range(0, 30)
productC1 without MDO (tier 2) invocation notification frequencysrc/share/vm/runtime/globals.hpp
Tier3AOTBackEdgeThresholdOpenJDK10intxruntime120000
range(0, max_jint)
productBack edge threshold at which tier 3 OSR compilation is invoked if coming from AOTsrc/share/vm/runtime/globals.hpp
Tier3AOTCompileThresholdOpenJDK10intxruntime15000
range(0, max_jint)
productThreshold at which tier 3 compilation is invoked (invocation minimum must be satisfied) if coming from AOTsrc/share/vm/runtime/globals.hpp
Tier3AOTInvocationThresholdOpenJDK10intxruntime10000
range(0, max_jint)
productCompile if number of method invocations crosses this threshold if coming from AOTsrc/share/vm/runtime/globals.hpp
Tier3AOTMinInvocationThresholdOpenJDK10intxruntime1000
range(0, max_jint)
productMinimum invocation to compile at tier 3 if coming from AOTsrc/share/vm/runtime/globals.hpp
Tier3BackEdgeThresholdOpenJDK10intxruntime60000
range(0, max_jint)
productBack edge threshold at which tier 3 OSR compilation is invokedsrc/share/vm/runtime/globals.hpp
Tier3BackEdgeThresholdOpenJDK10intxzeroshark100000define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
Tier3BackedgeNotifyFreqLogOpenJDK10intxruntime13
range(0, 30)
productC1 with MDO profiling (tier 3) invocation notification frequencysrc/share/vm/runtime/globals.hpp
Tier3CompileThresholdOpenJDK10intxruntime2000
range(0, max_jint)
productThreshold at which tier 3 compilation is invoked (invocation minimum must be satisfied)src/share/vm/runtime/globals.hpp
Tier3CompileThresholdOpenJDK10intxzeroshark2500define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
Tier3DelayOffOpenJDK10intxruntime2
range(0, max_jint)
productIf C2 queue size is less than this amount per compiler thread allow methods compiled at tier 2 transition to tier 3src/share/vm/runtime/globals.hpp
Tier3DelayOnOpenJDK10intxruntime5
range(0, max_jint)
productIf C2 queue size grows over this amount per compiler thread stop compiling at tier 3 and start compiling at tier 2src/share/vm/runtime/globals.hpp
Tier3InvocationThresholdOpenJDK10intxruntime200
range(0, max_jint)
productCompile if number of method invocations crosses this thresholdsrc/share/vm/runtime/globals.hpp
Tier3InvokeNotifyFreqLogOpenJDK10intxruntime10
range(0, 30)
productC1 with MDO profiling (tier 3) invocation notification frequencysrc/share/vm/runtime/globals.hpp
Tier3LoadFeedbackOpenJDK10intxruntime5
range(0, max_jint)
productTier 3 thresholds will increase twofold when C1 queue size reaches this amount per compiler threadsrc/share/vm/runtime/globals.hpp
Tier3MinInvocationThresholdOpenJDK10intxruntime100
range(0, max_jint)
productMinimum invocation to compile at tier 3src/share/vm/runtime/globals.hpp
Tier4BackEdgeThresholdOpenJDK10intxruntime40000
range(0, max_jint)
productBack edge threshold at which tier 4 OSR compilation is invokedsrc/share/vm/runtime/globals.hpp
Tier4BackEdgeThresholdOpenJDK10intxzeroshark100000define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
Tier4CompileThresholdOpenJDK10intxruntime15000
range(0, max_jint)
productThreshold at which tier 4 compilation is invoked (invocation minimum must be satisfiedsrc/share/vm/runtime/globals.hpp
Tier4CompileThresholdOpenJDK10intxzeroshark4500define_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
Tier4InvocationThresholdOpenJDK10intxruntime5000
range(0, max_jint)
productCompile if number of method invocations crosses this thresholdsrc/share/vm/runtime/globals.hpp
Tier4LoadFeedbackOpenJDK10intxruntime3
range(0, max_jint)
productTier 4 thresholds will increase twofold when C2 queue size reaches this amount per compiler threadsrc/share/vm/runtime/globals.hpp
Tier4MinInvocationThresholdOpenJDK10intxruntime600
range(0, max_jint)
productMinimum invocation to compile at tier 4src/share/vm/runtime/globals.hpp
TieredCompilationOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
TieredCompilationOpenJDK10boolaarch64c2trueInTiereddefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
TieredCompilationOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
TieredCompilationOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
TieredCompilationOpenJDK10boolruntimeproduct_pdEnable tiered compilationsrc/share/vm/runtime/globals.hpp
TieredCompilationOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
TieredCompilationOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
TieredCompilationOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
TieredCompilationOpenJDK10bools390c2trueInTiereddefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
TieredCompilationOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
TieredCompilationOpenJDK10boolsparcc2trueInTiereddefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
TieredCompilationOpenJDK10boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
TieredCompilationOpenJDK10boolx86c2trueInTiereddefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
TieredCompilationOpenJDK10boolzerosharkfalsedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
TieredCompileTaskTimeoutOpenJDK10intxruntime50
range(0, max_intx)
productKill compile task if method was not used within given timeout in millisecondssrc/share/vm/runtime/globals.hpp
TieredRateUpdateMaxTimeOpenJDK10intxruntime25
range(0, max_intx)
productMaximum rate sampling interval (in milliseconds)src/share/vm/runtime/globals.hpp
TieredRateUpdateMinTimeOpenJDK10intxruntime1
range(0, max_intx)
productMinimum rate sampling interval (in milliseconds)src/share/vm/runtime/globals.hpp
TieredStopAtLevelOpenJDK10intxruntime4
range(0, 4)
productStop at given compilation levelsrc/share/vm/runtime/globals.hpp
TimeCompilationPolicyOpenJDK10boolruntimefalsedevelopTime the compilation policysrc/share/vm/runtime/globals.hpp
TimeEachLinearScanOpenJDK10boolc1falsedevelopprint detailed timing of each LinearScan runsrc/share/vm/c1/c1_globals.hpp
TimeLinearScanOpenJDK10boolc1falseproductdetailed timing of LinearScan phasessrc/share/vm/c1/c1_globals.hpp
TimeLivenessAnalysisOpenJDK10boolruntimefalsedevelopTime computation of bytecode liveness analysissrc/share/vm/runtime/globals.hpp
TimeOopMap2OpenJDK10boolruntimefalsedevelopTime calls to GenerateOopMap::compute_map() individuallysrc/share/vm/runtime/globals.hpp
TimeOopMapOpenJDK10boolruntimefalsedevelopTime calls to GenerateOopMap::compute_map() in sumsrc/share/vm/runtime/globals.hpp
TraceBytecodesAtOpenJDK10intxruntime0developTrace bytecodes starting with specified bytecode numbersrc/share/vm/runtime/globals.hpp
TraceBytecodesOpenJDK10boolruntimefalsedevelopTrace bytecode executionsrc/share/vm/runtime/globals.hpp
TraceCISCSpillOpenJDK10boolc2falsenotproductTrace allocators use of cisc spillable instructionssrc/share/vm/opto/c2_globals.hpp
TraceCallFixupOpenJDK10boolruntimefalsedevelopTrace all call fixupssrc/share/vm/runtime/globals.hpp
TraceCodeBlobStacksOpenJDK10boolruntimefalsenotproductTrace stack-walk of codeblobssrc/share/vm/runtime/globals.hpp
TraceCompilationPolicyOpenJDK10boolruntimefalsedevelopTrace compilation policysrc/share/vm/runtime/globals.hpp
TraceCompiledICOpenJDK10boolruntimefalsedevelopTrace changes of compiled ICsrc/share/vm/runtime/globals.hpp
TraceCreateZombiesOpenJDK10boolruntimefalsedeveloptrace creation of zombie nmethodssrc/share/vm/runtime/globals.hpp
TraceDeoptimizationOpenJDK10boolruntimefalsedevelopTrace deoptimizationsrc/share/vm/runtime/globals.hpp
TraceDependenciesOpenJDK10boolruntimefalsedevelopTrace dependenciessrc/share/vm/runtime/globals.hpp
TraceDerivedPointersOpenJDK10boolruntimefalsedevelopTrace traversal of derived pointers on stacksrc/share/vm/runtime/globals.hpp
TraceFPURegisterUsageOpenJDK10boolc1falsedevelopTrace usage of FPU registers at start of blocks (intel only)src/share/vm/c1/c1_globals.hpp
TraceFPUStackOpenJDK10boolc1falsedevelopTrace emulation of the FPU stack (intel only)src/share/vm/c1/c1_globals.hpp
TraceFinalizerRegistrationOpenJDK10boolruntimefalsedevelopTrace registration of final referencessrc/share/vm/runtime/globals.hpp
TraceFrequencyInliningOpenJDK10boolruntimefalsedevelopTrace frequency based inliningsrc/share/vm/runtime/globals.hpp
TraceGCTaskManagerOpenJDK10boolruntimefalsedevelopTrace actions of the GC task managersrc/share/vm/runtime/globals.hpp
TraceGCTaskQueueOpenJDK10boolruntimefalsedevelopTrace actions of the GC task queuessrc/share/vm/runtime/globals.hpp
TraceICBufferOpenJDK10boolruntimefalsedevelopTrace usage of IC buffersrc/share/vm/runtime/globals.hpp
TraceICsOpenJDK10boolruntimefalsedevelopTrace inline cache changessrc/share/vm/runtime/globals.hpp
TraceInlineCacheClearingOpenJDK10boolruntimefalsedevelopTrace clearing of inline caches in nmethodssrc/share/vm/runtime/globals.hpp
TraceInvocationCounterOverflowOpenJDK10boolruntimefalsenotproductTrace method invocation counter overflowsrc/share/vm/runtime/globals.hpp
TraceInvokeDynamicOpenJDK10boolruntimefalsedeveloptrace internal invoke dynamic operationssrc/share/vm/runtime/globals.hpp
TraceIterativeGVNOpenJDK10boolc2falsedevelopPrint progress during Iterative Global Value Numberingsrc/share/vm/opto/c2_globals.hpp
TraceJVMTIObjectTaggingOpenJDK10boolruntimefalsediagnosticTrace JVMTI object tagging callssrc/share/vm/runtime/globals.hpp
TraceJVMTIOpenJDK10ccstrruntimeNULLproductTrace flags for JVMTI functions and eventssrc/share/vm/runtime/globals.hpp
TraceJavaAssertionsOpenJDK10boolruntimefalsedevelopTrace java language assertionssrc/share/vm/runtime/globals.hpp
TraceLinearScanLevelOpenJDK10intxc10
range(0, 4)
developDebug levels for the linear scan allocatorsrc/share/vm/c1/c1_globals.hpp
TraceLivenessGenOpenJDK10boolruntimefalsedevelopTrace the generation of liveness analysis informationsrc/share/vm/runtime/globals.hpp
TraceLivenessQueryOpenJDK10boolruntimefalsenotproductTrace queries of liveness analysis informationsrc/share/vm/runtime/globals.hpp
TraceLongCompilesOpenJDK10boolruntimefalsedevelopPrint out every time compilation is longer than a given thresholdsrc/share/vm/runtime/globals.hpp
TraceLoopLimitCheckOpenJDK10boolc2falsedevelopTrace generation of loop limits checkssrc/share/vm/opto/c2_globals.hpp
TraceLoopOptsOpenJDK10boolc2falsedevelopTrace executed loop optimizationssrc/share/vm/opto/c2_globals.hpp
TraceLoopPredicateOpenJDK10boolc2falsedevelopTrace generation of loop predicatessrc/share/vm/opto/c2_globals.hpp
TraceLoopUnswitchingOpenJDK10boolc2falsenotproductTrace loop unswitchingsrc/share/vm/opto/c2_globals.hpp
TraceMethodHandlesOpenJDK10boolruntimefalsedeveloptrace internal method handle operationssrc/share/vm/runtime/globals.hpp
TraceMethodReplacementOpenJDK10boolruntimefalsedevelopPrint when methods are replaced do to recompilationsrc/share/vm/runtime/globals.hpp
TraceNMethodInstallsOpenJDK10Deprecated in JDK13
Obsoleted in JDK14
Expired in JDK15
boolruntimefalsediagnosticTrace nmethod installationsrc/share/vm/runtime/globals.hpp
TraceNewOopMapGenerationDetailedOpenJDK10boolruntimefalsedevelopTrace OopMapGeneration: print detailed cell statessrc/share/vm/runtime/globals.hpp
TraceNewOopMapGenerationOpenJDK10boolruntimefalsedevelopTrace OopMapGenerationsrc/share/vm/runtime/globals.hpp
TraceNewVectorsOpenJDK10boolc2falsenotproductTrace creation of Vector nodessrc/share/vm/opto/c2_globals.hpp
TraceOldGenTimeOpenJDK9boolruntimefalseproductTrace accumulated time for old collectionsrc/share/vm/runtime/globals.hpp
TraceOnStackReplacementOpenJDK10boolruntimefalsenotproductTrace on stack replacementsrc/share/vm/runtime/globals.hpp
TraceOopMapGenerationOpenJDK6boolruntimefalsedevelopShow OopMapGenerationsrc/share/vm/runtime/globals.hpp
TraceOopMapRewritesOpenJDK10boolruntimefalsedevelopTrace rewriting of method oops during oop map generationsrc/share/vm/runtime/globals.hpp
TraceOptimizeFillOpenJDK10boolc2falsedevelopprint detailed information about fill conversionsrc/share/vm/opto/c2_globals.hpp
TraceOptoOutputOpenJDK10boolc2falsenotproductTrace pipelining informationsrc/share/vm/opto/c2_globals.hpp
TraceOptoParseOpenJDK10boolc2falsedevelopTrace bytecode parse and control-flow mergesrc/share/vm/opto/c2_globals.hpp
TraceOptoPipeliningOpenJDK10boolc2falsenotproductTrace pipelining informationsrc/share/vm/opto/c2_globals.hpp
TraceParallelOldGCDensePrefixOpenJDK10boolruntimefalsedevelopTrace dense prefix computation for ParallelOldGCsrc/share/vm/runtime/globals.hpp
TraceParallelOldGCMarkingPhaseOpenJDK10boolruntimefalsedevelopTrace marking phase in ParallelOldGCsrc/share/vm/runtime/globals.hpp
TracePartialPeelingOpenJDK10boolc2falsenotproductTrace partial peeling (loop rotation) informationsrc/share/vm/opto/c2_globals.hpp
TracePatchingOpenJDK10boolc1falsedevelopTrace patching of field access on uninitialized classessrc/share/vm/c1/c1_globals.hpp
TracePcPatchingOpenJDK10boolruntimefalsedevelopTrace usage of frame::patch_pcsrc/share/vm/runtime/globals.hpp
TracePhaseCCPOpenJDK10boolc2falsenotproductPrint progress during Conditional Constant Propagationsrc/share/vm/opto/c2_globals.hpp
TracePostallocExpandOpenJDK10boolc2falsedevelopTrace expanding nodes after register allocation.src/share/vm/opto/c2_globals.hpp
TracePredicateFailedTrapsOpenJDK10boolc1falsedeveloptrace runtime traps caused by predicate failuresrc/share/vm/c1/c1_globals.hpp
TraceProfileInterpreterOpenJDK10boolruntimefalsedevelopTrace profiling at the bytecode level during interpretation. This outputs the profiling information collected to improve jit compilation.src/share/vm/runtime/globals.hpp
TraceProfileTripCountOpenJDK10boolc2falsenotproductTrace profile loop trip count informationsrc/share/vm/opto/c2_globals.hpp
TraceRangeCheckEliminationOpenJDK10boolc1falsedevelopTrace Range Check Eliminationsrc/share/vm/c1/c1_globals.hpp
TraceRangeLimitCheckOpenJDK10boolc2falsedevelopTrace additional overflow checks in RCEsrc/share/vm/opto/c2_globals.hpp
TraceRelocatorOpenJDK10boolruntimefalsedevelopTrace the bytecode relocatorsrc/share/vm/runtime/globals.hpp
TraceScavengeOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalsenotproductTrace scavengesrc/share/vm/runtime/globals.hpp
TraceSpillingOpenJDK10boolc2falsediagnosticTrace spillingsrc/share/vm/opto/c2_globals.hpp
TraceSuperWordLoopUnrollAnalysisOpenJDK10boolc2falsenotproductTrace what Superword Level Parallelism analysis appliessrc/share/vm/opto/c2_globals.hpp
TraceSuperWordOpenJDK10boolc2falsenotproductTrace superword transformssrc/share/vm/opto/c2_globals.hpp
TraceSuspendWaitFailuresOpenJDK10boolruntimefalseproductTrace external suspend wait failuressrc/share/vm/runtime/globals.hpp
TraceTrapsOpenJDK10boolaarch64falseproductTrace all traps the signal handlersrc/cpu/aarch64/vm/globals_aarch64.hpp
TraceTrapsOpenJDK10boolppcfalseproductTrace all traps the signal handlerhandles.src/cpu/ppc/vm/globals_ppc.hpp
TraceTrapsOpenJDK10bools390falseproductTrace all traps the signal handlerhandles.src/cpu/s390/vm/globals_s390.hpp
TraceTypeProfileOpenJDK10boolc2falsediagnosticTrace type profilesrc/share/vm/opto/c2_globals.hpp
TraceUncollectedSpeculationsOpenJDK10booljvmcifalsedevelopPrint message when a failed speculation was not collectedsrc/share/vm/jvmci/jvmci_globals.hpp
TraceYoungGenTimeOpenJDK9boolruntimefalseproductTrace accumulated time for young collectionsrc/share/vm/runtime/globals.hpp
TrackedInitializationLimitOpenJDK10intxc250
range(0, 65535)
productWhen initializing fields, track up to this many wordssrc/share/vm/opto/c2_globals.hpp
TransmitErrorReportOpenJDK10Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproductEnable error report transmission on erroneous terminationsrc/share/vm/runtime/globals.hpp
TrapBasedICMissChecksOpenJDK10boolppctrueproductRaise and handle SIGTRAP if inline cache miss detected.src/cpu/ppc/vm/globals_ppc.hpp
TrapBasedNotEntrantChecksOpenJDK10boolppctrueproductRaise and handle SIGTRAP if calling not entrant or zombie method.src/cpu/ppc/vm/globals_ppc.hpp
TrapBasedNullChecksOpenJDK10boolaarch64falsedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
TrapBasedNullChecksOpenJDK10boolarmfalsedefine_pd_global// Not neededsrc/cpu/arm/vm/globals_arm.hpp
TrapBasedNullChecksOpenJDK10boolruntimeproduct_pdGenerate code for null checks that uses a cmp and trap instruction raising SIGTRAP. This is only used if an access tonull (+offset) will not raise a SIGSEGV, i.e.,ImplicitNullChecks don't work (PPC64).src/share/vm/runtime/globals.hpp
TrapBasedNullChecksOpenJDK10boolppctruedefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
TrapBasedNullChecksOpenJDK10bools390truedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
TrapBasedNullChecksOpenJDK10boolsparcfalsedefine_pd_global// Not needed on sparc.src/cpu/sparc/vm/globals_sparc.hpp
TrapBasedNullChecksOpenJDK10boolx86falsedefine_pd_global// Not needed on x86.src/cpu/x86/vm/globals_x86.hpp
TrapBasedNullChecksOpenJDK10boolzerofalsedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
TrapBasedRangeChecksOpenJDK10boolaarch64c2falsedefine_pd_global// Not needed.src/cpu/aarch64/vm/c2_globals_aarch64.hpp
TrapBasedRangeChecksOpenJDK10boolarmc2falsedefine_pd_global// Not neededsrc/cpu/arm/vm/c2_globals_arm.hpp
TrapBasedRangeChecksOpenJDK10boolc2product_pdGenerate code for range checks that uses a cmp and trap instruction raising SIGTRAP. Used on PPC64.src/share/vm/opto/c2_globals.hpp
TrapBasedRangeChecksOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
TrapBasedRangeChecksOpenJDK10bools390c2falsedefine_pd_global// Not needed on z/Architecture.src/cpu/s390/vm/c2_globals_s390.hpp
TrapBasedRangeChecksOpenJDK10boolsparcc2falsedefine_pd_global// Not needed on sparc.src/cpu/sparc/vm/c2_globals_sparc.hpp
TrapBasedRangeChecksOpenJDK10boolx86c2falsedefine_pd_global// Not needed on x86.src/cpu/x86/vm/c2_globals_x86.hpp
TrustFinalNonStaticFieldsOpenJDK10boolruntimefalseexperimentaltrust final non-static declarations for constant foldingsrc/share/vm/runtime/globals.hpp
TwoOperandLIRFormOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
TwoOperandLIRFormOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
TwoOperandLIRFormOpenJDK10boolc1develop_pdtrue if LIR requires src1 and dst to match in binary LIR opssrc/share/vm/c1/c1_globals.hpp
TwoOperandLIRFormOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
TwoOperandLIRFormOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
TwoOperandLIRFormOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
TwoOperandLIRFormOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
TypeProfileArgsLimitOpenJDK10intxruntime2
range(0, 16)
productmax number of call arguments to consider for type profilingsrc/share/vm/runtime/globals.hpp
TypeProfileCastsOpenJDK10boolruntimetruedeveloptreat casts like calls for purposes of type profilingsrc/share/vm/runtime/globals.hpp
TypeProfileLevelOpenJDK10uintxaarch64111define_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
TypeProfileLevelOpenJDK10uintxarm0define_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
TypeProfileLevelOpenJDK10uintxruntimeproduct_pd=XYZ, with Z: Type profiling of arguments at call; Y: Type profiling of return value at call; X: Type profiling of parameters to methods; X, Y and Z in 0=off ; 1=jsr292 only; 2=all methodssrc/share/vm/runtime/globals.hpp
TypeProfileLevelOpenJDK10uintxppc111define_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
TypeProfileLevelOpenJDK10uintxs390111define_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
TypeProfileLevelOpenJDK10uintxsparc111define_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
TypeProfileLevelOpenJDK10uintxx86111define_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
TypeProfileLevelOpenJDK10uintxzero0define_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
TypeProfileMajorReceiverPercentOpenJDK10intxc290
range(0, 100)
product% of major receiver type to all profiled receiverssrc/share/vm/opto/c2_globals.hpp
TypeProfileParmsLimitOpenJDK10intxruntime2
range(-1, 64)
productmax number of incoming parameters to consider for type profiling, -1 for allsrc/share/vm/runtime/globals.hpp
TypeProfileWidthOpenJDK10intxruntime2
range(0, 8)
productNumber of receiver types to record in call/cast profilesrc/share/vm/runtime/globals.hpp
UncommonNullCastOpenJDK10boolaarch64truedefine_pd_global// Uncommon-trap NULLs past to check castsrc/cpu/aarch64/vm/globals_aarch64.hpp
UncommonNullCastOpenJDK10boolarmtruedefine_pd_global// Uncommon-trap NULLs past to check castsrc/cpu/arm/vm/globals_arm.hpp
UncommonNullCastOpenJDK10boolruntimedevelop_pdtrack occurrences of null in casts; adjust compiler tacticssrc/share/vm/runtime/globals.hpp
UncommonNullCastOpenJDK10boolppctruedefine_pd_global// Uncommon-trap NULLs passed to check cast.src/cpu/ppc/vm/globals_ppc.hpp
UncommonNullCastOpenJDK10bools390truedefine_pd_global// Uncommon-trap NULLs passed to check cast.src/cpu/s390/vm/globals_s390.hpp
UncommonNullCastOpenJDK10boolsparctruedefine_pd_global// Uncommon-trap NULLs passed to check castsrc/cpu/sparc/vm/globals_sparc.hpp
UncommonNullCastOpenJDK10boolx86truedefine_pd_global// Uncommon-trap NULLs passed to check castsrc/cpu/x86/vm/globals_x86.hpp
UncommonNullCastOpenJDK10boolzerotruedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
UnguardOnExecutionViolationOpenJDK10intxruntime0
range(0, 2)
productUnguard page and retry on no-execute fault (Win32 only)
0=off, 1=conservative, 2=aggressive
src/share/vm/runtime/globals.hpp
UnlinkSymbolsALotOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproductUnlink unreferenced symbols from the symbol table at safepointssrc/share/vm/runtime/globals.hpp
UnlockDiagnosticVMOptionsOpenJDK10boolruntimetrueInDebugdiagnosticEnable normal processing of flags relating to field diagnosticssrc/share/vm/runtime/globals.hpp
UnlockExperimentalVMOptionsOpenJDK10boolruntimefalseexperimentalEnable normal processing of flags relating to experimental featuressrc/share/vm/runtime/globals.hpp
UnrollLimitForProfileCheckOpenJDK10intxc21
range(0, max_intx)
developDon't use profile_trip_cnt() to restrict unrolling until unrolling would push the number of unrolled iterations above UnrollLimitForProfileCheck. A higher value allows more unrolling. Zero acts as a very large value.src/share/vm/opto/c2_globals.hpp
UnsyncloadClassOpenJDK10Deprecated in JDK10
Obsoleted in JDK11
Expired in JDK12
boolruntimefalsediagnosticUnstable: VM calls loadClass unsynchronized. Custom class loader must call VM synchronized for findClass and defineClass.src/share/vm/runtime/globals.hpp
Use24BitFPModeOpenJDK10boolc2truedevelopSet 24-bit FPU mode on a per-compile basissrc/share/vm/opto/c2_globals.hpp
Use24BitFPOpenJDK10boolc2truedevelopuse FP instructions that produce 24-bit precise resultssrc/share/vm/opto/c2_globals.hpp
Use64KPagesThresholdOpenJDK10uintxaix0develop4K/64K page allocation threshold.src/os/aix/vm/globals_aix.hpp
Use64KPagesOpenJDK10boolaixtrueproductUse 64K pages if available.src/os/aix/vm/globals_aix.hpp
UseAESCTRIntrinsicsOpenJDK10boolruntimefalsediagnosticUse intrinsics for the paralleled version of AES/CTR cryptosrc/share/vm/runtime/globals.hpp
UseAESIntrinsicsOpenJDK10boolruntimefalsediagnosticUse intrinsics for AES versions of cryptosrc/share/vm/runtime/globals.hpp
UseAESOpenJDK10boolruntimefalseproductControl whether AES instructions are used when availablesrc/share/vm/runtime/globals.hpp
UseAOTStrictLoadingOpenJDK10boolruntimefalsediagnosticExit the VM if any of the AOT libraries has invalid configsrc/share/vm/runtime/globals.hpp
UseAOTOpenJDK10boolruntimeAOT_ONLY(true) NOT_AOT(false)productUse AOT compiled filessrc/share/vm/runtime/globals.hpp
UseAVXOpenJDK10intxx862
range(0, 99)
productHighest supported AVX instructions set on x86/x64src/cpu/x86/vm/globals_x86.hpp
UseAdaptiveGCBoundaryOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolruntimefalseproductAllow young-old boundary to movesrc/share/vm/runtime/globals.hpp
UseAdaptiveGenerationSizePolicyAtMajorCollectionOpenJDK10boolruntimetrueproductUse adaptive young-old sizing policies at major collectionssrc/share/vm/runtime/globals.hpp
UseAdaptiveGenerationSizePolicyAtMinorCollectionOpenJDK10boolruntimetrueproductUse adaptive young-old sizing policies at minor collectionssrc/share/vm/runtime/globals.hpp
UseAdaptiveNUMAChunkSizingOpenJDK10boolruntimetrueproductEnable adaptive chunk sizing for NUMAsrc/share/vm/runtime/globals.hpp
UseAdaptiveSizeDecayMajorGCCostOpenJDK10boolruntimetrueproductAdaptive size decays the major cost for long major intervalssrc/share/vm/runtime/globals.hpp
UseAdaptiveSizePolicyFootprintGoalOpenJDK10boolruntimetrueproductUse adaptive minimum footprint as a goalsrc/share/vm/runtime/globals.hpp
UseAdaptiveSizePolicyWithSystemGCOpenJDK10boolruntimefalseproductInclude statistics from System.gc() for adaptive size policysrc/share/vm/runtime/globals.hpp
UseAdaptiveSizePolicyOpenJDK10boolruntimetrueproductUse adaptive generation sizing policiessrc/share/vm/runtime/globals.hpp
UseAddressNopOpenJDK10boolx86falseproductUse '0F 1F [addr]' NOP instructions on x86 cpussrc/cpu/x86/vm/globals_x86.hpp
UseAdler32IntrinsicsOpenJDK10boolruntimefalsediagnosticuse intrinsics for java.util.zip.Adler32src/share/vm/runtime/globals.hpp
UseAutoGCSelectPolicyOpenJDK6boolruntimefalseproductUse automatic collection selection policysrc/share/vm/runtime/globals.hpp
UseBMI1InstructionsOpenJDK10boolx86falseproductUse BMI1 instructionssrc/cpu/x86/vm/globals_x86.hpp
UseBMI2InstructionsOpenJDK10boolx86falseproductUse BMI2 instructionssrc/cpu/x86/vm/globals_x86.hpp
UseBarriersForVolatileOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolaarch64falseproductUse memory barriers to implement volatile accessessrc/cpu/aarch64/vm/globals_aarch64.hpp
UseBiasedLockingOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
boolruntimetrueproductEnable biased locking in JVMsrc/share/vm/runtime/globals.hpp
UseBimorphicInliningOpenJDK10boolc2trueproductProfiling based inlining for two receiverssrc/share/vm/opto/c2_globals.hpp
UseBlockCopyOpenJDK10boolsparcfalseproductUse special cpu instructions for block copysrc/cpu/sparc/vm/globals_sparc.hpp
UseBlockZeroingOpenJDK10boolaarch64trueproductUse DC ZVA for block zeroingsrc/cpu/aarch64/vm/globals_aarch64.hpp
UseBlockZeroingOpenJDK10boolsparcfalseproductUse special cpu instructions for block zeroingsrc/cpu/sparc/vm/globals_sparc.hpp
UseBsdPosixThreadCPUClocksOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolbsdtrueproductenable fast Bsd Posix clocks where availablesrc/os/bsd/vm/globals_bsd.hpp
UseByteReverseInstructionOpenJDK10bools390trueproductUse byte reverse instruction.src/cpu/s390/vm/globals_s390.hpp
UseC1OptimizationsOpenJDK10boolc1truedevelopTurn on C1 optimizationssrc/share/vm/c1/c1_globals.hpp
UseCASForSwapOpenJDK10boolsparcfalsedevelopDo not use swap instructions, but only CAS (in a loop) on SPARCsrc/cpu/sparc/vm/globals_sparc.hpp
UseCBCondOpenJDK10boolsparcfalseproductUse compare and branch instruction on SPARCsrc/cpu/sparc/vm/globals_sparc.hpp
UseCGroupMemoryLimitForHeapOpenJDK10Deprecated in JDK10
Expired in JDK11
boolruntimefalseexperimentalUse CGroup memory limit as physical memory limit for heap sizingsrc/share/vm/runtime/globals.hpp
UseCHAOpenJDK10boolruntimetruedevelopEnable CHAsrc/share/vm/runtime/globals.hpp
UseCISCSpillOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
UseCISCSpillOpenJDK10boolarmc2falsedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
UseCISCSpillOpenJDK10boolc2develop_pdUse ADLC supplied cisc instructions during allocationsrc/share/vm/opto/c2_globals.hpp
UseCISCSpillOpenJDK10boolppcc2falsedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
UseCISCSpillOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
UseCISCSpillOpenJDK10boolsparcc2falsedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
UseCISCSpillOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
UseCLMULOpenJDK10boolx86falseproductControl whether CLMUL instructions can be used on x86/x64src/cpu/x86/vm/globals_x86.hpp
UseCMSBestFitOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimetrueproductUse CMS best fit allocation strategysrc/share/vm/runtime/globals.hpp
UseCMSInitiatingOccupancyOnlyOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductOnly use occupancy as a criterion for starting a CMS collectionsrc/share/vm/runtime/globals.hpp
UseCMoveUnconditionallyOpenJDK10boolc2falseproductUse CMove (scalar and vector) ignoring profitability test.src/share/vm/opto/c2_globals.hpp
UseCRC32CIntrinsicsOpenJDK10boolruntimefalsediagnosticuse intrinsics for java.util.zip.CRC32Csrc/share/vm/runtime/globals.hpp
UseCRC32IntrinsicsOpenJDK10boolruntimefalsediagnosticuse intrinsics for java.util.zip.CRC32src/share/vm/runtime/globals.hpp
UseCRC32OpenJDK10boolaarch64falseproductUse CRC32 instructions for CRC32 computationsrc/cpu/aarch64/vm/globals_aarch64.hpp
UseCodeAgingOpenJDK10boolruntimetrueproductInsert counter to detect warm methodssrc/share/vm/runtime/globals.hpp
UseCodeCacheFlushingOpenJDK10boolruntimetrueproductRemove cold/old nmethods from the code cachesrc/share/vm/runtime/globals.hpp
UseCompilerOpenJDK10boolruntimetrueproductUse Just-In-Time compilationsrc/share/vm/runtime/globals.hpp
UseCompressedClassPointersOpenJDK10boolruntimefalselp64_productUse 32-bit class pointers in 64-bit VM. lp64_product means flag is always constant in 32 bit VMsrc/share/vm/runtime/globals.hpp
UseCompressedOopsOpenJDK10boolruntimefalselp64_productUse 32-bit object references in 64-bit VM. lp64_product means flag is always constant in 32 bit VMsrc/share/vm/runtime/globals.hpp
UseConcMarkSweepGCOpenJDK10Obsoleted in JDK14
Expired in JDK15
boolruntimefalseproductUse Concurrent Mark-Sweep GC in the old generationsrc/share/vm/runtime/globals.hpp
UseCondCardMarkOpenJDK10boolruntimefalseproductCheck for already marked card before updating card tablesrc/share/vm/runtime/globals.hpp
UseCountLeadingZerosInstructionOpenJDK10boolx86falseproductUse count leading zeros instructionsrc/cpu/x86/vm/globals_x86.hpp
UseCountLeadingZerosInstructionsPPC64OpenJDK10boolppctrueproductUse count leading zeros instructions.src/cpu/ppc/vm/globals_ppc.hpp
UseCountTrailingZerosInstructionOpenJDK10boolx86falseproductUse count trailing zeros instructionsrc/cpu/x86/vm/globals_x86.hpp
UseCountedLoopSafepointsOpenJDK10boolc2falseproductForce counted loops to keep a safepointsrc/share/vm/opto/c2_globals.hpp
UseCounterDecayOpenJDK10boolruntimetrueproductAdjust recompilation counterssrc/share/vm/runtime/globals.hpp
UseCpuAllocPathOpenJDK10boollinuxfalsediagnosticUse CPU_ALLOC code path in os::active_processor_countsrc/os/linux/vm/globals_linux.hpp
UseCriticalCMSThreadPriorityOpenJDK10boolruntimefalseexperimentalConcurrentMarkSweep thread runs at critical scheduling prioritysrc/share/vm/runtime/globals.hpp
UseCriticalCompilerThreadPriorityOpenJDK10boolruntimefalseexperimentalCompiler thread(s) run at critical scheduling prioritysrc/share/vm/runtime/globals.hpp
UseCriticalJavaThreadPriorityOpenJDK10boolruntimefalseexperimentalJava thread priority 10 maps to critical scheduling prioritysrc/share/vm/runtime/globals.hpp
UseDetachedThreadsOpenJDK10boolruntimetruedevelopUse detached threads that are recycled upon termination (for Solaris only)src/share/vm/runtime/globals.hpp
UseDivModOpenJDK10boolc2trueproductUse combined DivMod instruction if availablesrc/share/vm/opto/c2_globals.hpp
UseDynamicNumberOfGCThreadsOpenJDK10boolruntimefalseproductDynamically choose the number of parallel threads parallel gc will usesrc/share/vm/runtime/globals.hpp
UseExactTypesOpenJDK10boolc2truedevelopUse exact types to eliminate array store checks and v-callssrc/share/vm/opto/c2_globals.hpp
UseExplicitCommitOpenJDK10boolaixfalseproductExplicit commit for virtual memory.src/os/aix/vm/globals_aix.hpp
UseExtendedFileIOOpenJDK10boolsolaristrueproductEnable workaround for limitations of stdio FILE structuresrc/os/solaris/vm/globals_solaris.hpp
UseExtendedLoadAndReserveInstructionsPPC64OpenJDK10boolppcfalseproductUse extended versions of load-and-reserve instructions.src/cpu/ppc/vm/globals_ppc.hpp
UseFMAOpenJDK10boolruntimefalseproductControl whether FMA instructions are used when availablesrc/share/vm/runtime/globals.hpp
UseFPUForSpillingOpenJDK10boolc2falseproductSpill integer registers to FPU instead of stack when possiblesrc/share/vm/opto/c2_globals.hpp
UseFakeTimersOpenJDK10boolruntimefalsedevelopTell whether the VM should use system time or a fake timersrc/share/vm/runtime/globals.hpp
UseFastAccessorMethodsOpenJDK10boolzerotrueproductUse fast method entry code for accessor methodssrc/cpu/zero/vm/globals_zero.hpp
UseFastEmptyMethodsOpenJDK10boolzerotrueproductUse fast method entry code for empty methodssrc/cpu/zero/vm/globals_zero.hpp
UseFastJNIAccessorsOpenJDK10boolruntimetrueproductUse optimized versions of Get<Primitive>Fieldsrc/share/vm/runtime/globals.hpp
UseFastLockingOpenJDK10boolc1truedevelopUse fast inlined locking codesrc/share/vm/c1/c1_globals.hpp
UseFastNewInstanceOpenJDK10boolc1truedevelopUse fast inlined instance allocationsrc/share/vm/c1/c1_globals.hpp
UseFastNewObjectArrayOpenJDK10boolc1truedevelopUse fast inlined object array allocationsrc/share/vm/c1/c1_globals.hpp
UseFastNewTypeArrayOpenJDK10boolc1truedevelopUse fast inlined type array allocationsrc/share/vm/c1/c1_globals.hpp
UseFastSignatureHandlersOpenJDK10boolruntimetruedevelopUse fast signature handlers for native callssrc/share/vm/runtime/globals.hpp
UseFastStosbOpenJDK10boolx86falseproductUse fast-string operation for zeroing: rep stosbsrc/cpu/x86/vm/globals_x86.hpp
UseG1GCOpenJDK10boolruntimefalseproductUse the Garbage-First garbage collectorsrc/share/vm/runtime/globals.hpp
UseGCOverheadLimitOpenJDK10boolruntimetrueproductUse policy to limit of proportion of time spent in GC before an OutOfMemory error is thrownsrc/share/vm/runtime/globals.hpp
UseGCTaskAffinityOpenJDK10Obsoleted in JDK14
Expired in JDK16
boolruntimefalseproductUse worker affinity when asking for GCTaskssrc/share/vm/runtime/globals.hpp
UseGHASHIntrinsicsOpenJDK10boolruntimefalsediagnosticUse intrinsics for GHASH versions of cryptosrc/share/vm/runtime/globals.hpp
UseGlobalValueNumberingOpenJDK10boolc1truedevelopUse Global Value Numbering (separate phase)src/share/vm/c1/c1_globals.hpp
UseHeavyMonitorsOpenJDK10boolruntimefalseproductuse heavyweight instead of lightweight Java monitorssrc/share/vm/runtime/globals.hpp
UseHugeTLBFSOpenJDK10Obsoleted in JDK12
Expired in JDK13
boolbsdfalseproductUse MAP_HUGETLB for large pagessrc/os/bsd/vm/globals_bsd.hpp
UseHugeTLBFSOpenJDK10Obsoleted in JDK12
Expired in JDK13
boollinuxfalseproductUse MAP_HUGETLB for large pagessrc/os/linux/vm/globals_linux.hpp
UseImplicitStableValuesOpenJDK10Obsoleted in JDK13
Expired in JDK14
boolc2truediagnosticMark well-known stable fields as such (e.g. String.value)src/share/vm/opto/c2_globals.hpp
UseIncDecOpenJDK10boolx86truediagnosticUse INC, DEC instructions on x86src/cpu/x86/vm/globals_x86.hpp
UseInlineCachesOpenJDK10boolruntimetrueproductUse Inline Caches for virtual callssrc/share/vm/runtime/globals.hpp
UseInlineDepthForSpeculativeTypesOpenJDK10boolc2truediagnosticCarry inline depth of profile point with speculative type and give priority to profiling from lower inline depthsrc/share/vm/opto/c2_globals.hpp
UseInterpreterOpenJDK10boolruntimetrueproductUse interpreter for non-compiled methodssrc/share/vm/runtime/globals.hpp
UseJVMCICompilerOpenJDK10booljvmcifalseexperimentalUse JVMCI as the default compilersrc/share/vm/jvmci/jvmci_globals.hpp
UseJumpTablesOpenJDK10boolc2trueproductUse JumpTables instead of a binary search tree for switchessrc/share/vm/opto/c2_globals.hpp
UseLSEOpenJDK10boolaarch64falseproductUse LSE instructionssrc/cpu/aarch64/vm/globals_aarch64.hpp
UseLWPSynchronizationOpenJDK10Obsoleted in JDK15
Expired in JDK16
boolruntimetrueproductUse LWP-based instead of libthread-based synchronization (SPARC only)src/share/vm/runtime/globals.hpp
UseLargePagesInMetaspaceOpenJDK10Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproductUse large page memory in metaspace. Only used if UseLargePages is enabled.src/share/vm/runtime/globals.hpp
UseLargePagesIndividualAllocationOpenJDK10boolaixfalsedefine_pd_globalsrc/os/aix/vm/globals_aix.hpp
UseLargePagesIndividualAllocationOpenJDK10boolbsdfalsedefine_pd_globalsrc/os/bsd/vm/globals_bsd.hpp
UseLargePagesIndividualAllocationOpenJDK10boollinuxfalsedefine_pd_globalsrc/os/linux/vm/globals_linux.hpp
UseLargePagesIndividualAllocationOpenJDK10boolruntimeproduct_pdAllocate large pages individually for better affinitysrc/share/vm/runtime/globals.hpp
UseLargePagesIndividualAllocationOpenJDK10boolsolarisfalsedefine_pd_globalsrc/os/solaris/vm/globals_solaris.hpp
UseLargePagesIndividualAllocationOpenJDK10boolwindowstruedefine_pd_globalsrc/os/windows/vm/globals_windows.hpp
UseLargePagesOpenJDK10boolaixfalsedefine_pd_globalsrc/os/aix/vm/globals_aix.hpp
UseLargePagesOpenJDK10boolbsdfalsedefine_pd_globalsrc/os/bsd/vm/globals_bsd.hpp
UseLargePagesOpenJDK10boollinuxfalsedefine_pd_globalsrc/os/linux/vm/globals_linux.hpp
UseLargePagesOpenJDK10boolruntimeproduct_pdUse large page memorysrc/share/vm/runtime/globals.hpp
UseLargePagesOpenJDK10boolsolaristruedefine_pd_globalsrc/os/solaris/vm/globals_solaris.hpp
UseLargePagesOpenJDK10boolwindowsfalsedefine_pd_globalsrc/os/windows/vm/globals_windows.hpp
UseLibmIntrinsicOpenJDK10boolx86truediagnosticUse Libm Intrinsicssrc/cpu/x86/vm/globals_x86.hpp
UseLinuxPosixThreadCPUClocksOpenJDK10boollinuxtrueproductenable fast Linux Posix clocks where availablesrc/os/linux/vm/globals_linux.hpp
UseLoadInstructionsForStackBangingPPC64OpenJDK10boolppcfalseproductUse load instructions for stack banging.src/cpu/ppc/vm/globals_ppc.hpp
UseLocalValueNumberingOpenJDK10boolc1truedevelopUse Local Value Numbering (embedded in GraphBuilder)src/share/vm/c1/c1_globals.hpp
UseLockedTracingOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolruntimefalseproductUse locked-tracing when doing event-based tracingsrc/share/vm/runtime/globals.hpp
UseLoopCounterOpenJDK10boolruntimetrueproductIncrement invocation counter on backward branchsrc/share/vm/runtime/globals.hpp
UseLoopInvariantCodeMotionOpenJDK10boolc1trueproductSimple loop invariant code motion for short loops during GVNsrc/share/vm/c1/c1_globals.hpp
UseLoopPredicateOpenJDK10boolc2trueproductGenerate a predicate to select fast/slow loop versionssrc/share/vm/opto/c2_globals.hpp
UseLoopSafepointsOpenJDK10boolruntimetruedevelopGenerate Safepoint nodes in every loopsrc/share/vm/runtime/globals.hpp
UseMallocOnlyOpenJDK10boolruntimefalsedevelopUse only malloc/free for allocation (no resource area/arena)src/share/vm/runtime/globals.hpp
UseMathExactIntrinsicsOpenJDK10boolc2truediagnosticEnables intrinsification of various java.lang.Math functionssrc/share/vm/opto/c2_globals.hpp
UseMaximumCompactionOnSystemGCOpenJDK10boolruntimetrueproductUse maximum compaction in the Parallel Old garbage collector for a system GCsrc/share/vm/runtime/globals.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolaarch64truedefine_pd_globalsrc/cpu/aarch64/vm/globals_aarch64.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolarmtruedefine_pd_globalsrc/cpu/arm/vm/globals_arm.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolruntimeproduct_pd(Unstable) Issues membars on thread state transitionssrc/share/vm/runtime/globals.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolppcfalsedefine_pd_globalsrc/cpu/ppc/vm/globals_ppc.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
bools390falsedefine_pd_globalsrc/cpu/s390/vm/globals_s390.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolsparcfalsedefine_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolx86falsedefine_pd_globalsrc/cpu/x86/vm/globals_x86.hpp
UseMembarOpenJDK10Deprecated in JDK10
Obsoleted in JDK12
boolzerotruedefine_pd_globalsrc/cpu/zero/vm/globals_zero.hpp
UseMontgomeryMultiplyIntrinsicOpenJDK10boolc2falsediagnosticEnables intrinsification of BigInteger.montgomeryMultiply()src/share/vm/opto/c2_globals.hpp
UseMontgomerySquareIntrinsicOpenJDK10boolc2falsediagnosticEnables intrinsification of BigInteger.montgomerySquare()src/share/vm/opto/c2_globals.hpp
UseMulAddIntrinsicOpenJDK10boolc2falsediagnosticEnables intrinsification of BigInteger.mulAdd()src/share/vm/opto/c2_globals.hpp
UseMultiplyToLenIntrinsicOpenJDK10boolc2falsediagnosticEnables intrinsification of BigInteger.multiplyToLen()src/share/vm/opto/c2_globals.hpp
UseNUMAInterleavingOpenJDK10boolruntimefalseproductInterleave memory across NUMA nodes if availablesrc/share/vm/runtime/globals.hpp
UseNUMAOpenJDK10boolruntimefalseproductUse NUMA if availablesrc/share/vm/runtime/globals.hpp
UseNeonOpenJDK10boolaarch64falseproductUse Neon for CRC32 computationsrc/cpu/aarch64/vm/globals_aarch64.hpp
UseNewCode2OpenJDK10boolruntimefalsediagnosticTesting Only: Use the new version while testingsrc/share/vm/runtime/globals.hpp
UseNewCode3OpenJDK10boolruntimefalsediagnosticTesting Only: Use the new version while testingsrc/share/vm/runtime/globals.hpp
UseNewCodeOpenJDK10boolruntimefalsediagnosticTesting Only: Use the new version while testingsrc/share/vm/runtime/globals.hpp
UseNewLongLShiftOpenJDK10boolx86falseproductUse optimized bitwise shift leftsrc/cpu/x86/vm/globals_x86.hpp
UseNiagaraInstrsOpenJDK10boolsparcfalseproductUse Niagara-efficient instruction subsetsrc/cpu/sparc/vm/globals_sparc.hpp
UseOSErrorReportingOpenJDK10boolaixfalsedefine_pd_globalsrc/os/aix/vm/globals_aix.hpp
UseOSErrorReportingOpenJDK10boolbsdfalsedefine_pd_globalsrc/os/bsd/vm/globals_bsd.hpp
UseOSErrorReportingOpenJDK10boollinuxfalsedefine_pd_globalsrc/os/linux/vm/globals_linux.hpp
UseOSErrorReportingOpenJDK10boolruntimeproduct_pdLet VM fatal error propagate to the OS (ie. WER on Windows)src/share/vm/runtime/globals.hpp
UseOSErrorReportingOpenJDK10boolsolarisfalsedefine_pd_globalsrc/os/solaris/vm/globals_solaris.hpp
UseOSErrorReportingOpenJDK10boolwindowsfalsedefine_pd_global// for now.src/os/windows/vm/globals_windows.hpp
UseOnStackReplacementOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
UseOnStackReplacementOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
UseOnStackReplacementOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
UseOnStackReplacementOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
UseOnStackReplacementOpenJDK10boolruntimeproduct_pdUse on stack replacement, calls runtime if invoc. counter overflows in loopsrc/share/vm/runtime/globals.hpp
UseOnStackReplacementOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
UseOnStackReplacementOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
UseOnStackReplacementOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
UseOnStackReplacementOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
UseOnStackReplacementOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
UseOnStackReplacementOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
UseOnStackReplacementOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
UseOnStackReplacementOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
UseOnStackReplacementOpenJDK10boolzerosharktruedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
UseOnlyInlinedBimorphicOpenJDK10boolc2trueproductDon't use BimorphicInlining if can't inline a second methodsrc/share/vm/opto/c2_globals.hpp
UseOprofileOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolbsdfalseproductenable support for Oprofile profilersrc/os/bsd/vm/globals_bsd.hpp
UseOprofileOpenJDK10Obsoleted in JDK16
Expired in JDK17
boollinuxfalseproductenable support for Oprofile profilersrc/os/linux/vm/globals_linux.hpp
UseOptoBiasInliningOpenJDK10Deprecated in JDK15
Obsoleted in JDK18
Expired in JDK19
boolc2trueproductGenerate biased locking code in C2 ideal graphsrc/share/vm/opto/c2_globals.hpp
UsePSAdaptiveSurvivorSizePolicyOpenJDK10boolruntimetrueproductUse adaptive survivor sizing policiessrc/share/vm/runtime/globals.hpp
UseParNewGCOpenJDK6boolruntimefalseproductUse parallel threads in the new generationsrc/share/vm/runtime/globals.hpp
UseParallelGCOpenJDK10boolruntimefalseproductUse the Parallel Scavenge garbage collectorsrc/share/vm/runtime/globals.hpp
UseParallelOldGCOpenJDK10Deprecated in JDK14
Obsoleted in JDK15
Expired in JDK16
boolruntimefalseproductUse the Parallel Old garbage collectorsrc/share/vm/runtime/globals.hpp
UsePerfDataOpenJDK10boolruntimetrueproductFlag to disable jvmstat instrumentation for performance testing and problem isolation purposessrc/share/vm/runtime/globals.hpp
UsePopCountInstructionOpenJDK10boolruntimefalseproductUse population count instructionsrc/share/vm/runtime/globals.hpp
UsePower6SchedulerPPC64OpenJDK10boolppcfalseproductUse Power6 Scheduler.src/cpu/ppc/vm/globals_ppc.hpp
UsePrivilegedStackOpenJDK10boolruntimetruedevelopEnable the security JVM functionssrc/share/vm/runtime/globals.hpp
UsePthreadsOpenJDK10boolruntimefalsedevelopUse pthread-based instead of libthread-based synchronization (SPARC only)src/share/vm/runtime/globals.hpp
UseRDPCForConstantTableBaseOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolc2falseproductUse Sparc RDPC instruction for the constant table base.src/share/vm/opto/c2_globals.hpp
UseRTMDeoptOpenJDK10boolppcfalseproductPerform deopt and recompilation based on RTM abort ratiosrc/cpu/ppc/vm/globals_ppc.hpp
UseRTMDeoptOpenJDK10boolx86falseproductPerform deopt and recompilation based on RTM abort ratiosrc/cpu/x86/vm/globals_x86.hpp
UseRTMForStackLocksOpenJDK10boolppcfalseexperimentalEnable RTM lock eliding for stack locks in compiled codesrc/cpu/ppc/vm/globals_ppc.hpp
UseRTMForStackLocksOpenJDK10boolx86falseexperimentalEnable RTM lock eliding for stack locks in compiled codesrc/cpu/x86/vm/globals_x86.hpp
UseRTMLockingOpenJDK10boolppcfalseproductEnable RTM lock eliding for inflated locks in compiled codesrc/cpu/ppc/vm/globals_ppc.hpp
UseRTMLockingOpenJDK10boolx86falseproductEnable RTM lock eliding for inflated locks in compiled codesrc/cpu/x86/vm/globals_x86.hpp
UseRTMXendForLockBusyOpenJDK10boolppctrueexperimentalUse RTM Xend instead of Xabort when lock busysrc/cpu/ppc/vm/globals_ppc.hpp
UseRTMXendForLockBusyOpenJDK10boolx86trueexperimentalUse RTM Xend instead of Xabort when lock busysrc/cpu/x86/vm/globals_x86.hpp
UseRelocIndexOpenJDK6boolruntimefalsedevelopUse an index to speed random access to relocationssrc/share/vm/runtime/globals.hpp
UseRotateAndMaskInstructionsPPC64OpenJDK10boolppctrueproductUse rotate and mask instructions.src/cpu/ppc/vm/globals_ppc.hpp
UseSHA1IntrinsicsOpenJDK10boolruntimefalsediagnosticUse intrinsics for SHA-1 crypto hash function. Requires that UseSHA is enabled.src/share/vm/runtime/globals.hpp
UseSHA256IntrinsicsOpenJDK10boolruntimefalsediagnosticUse intrinsics for SHA-224 and SHA-256 crypto hash functions. Requires that UseSHA is enabled.src/share/vm/runtime/globals.hpp
UseSHA512IntrinsicsOpenJDK10boolruntimefalsediagnosticUse intrinsics for SHA-384 and SHA-512 crypto hash functions. Requires that UseSHA is enabled.src/share/vm/runtime/globals.hpp
UseSHAOpenJDK10boolruntimefalseproductControl whether SHA instructions are used when availablesrc/share/vm/runtime/globals.hpp
UseSHMOpenJDK10Obsoleted in JDK12
Expired in JDK13
boolbsdfalseproductUse SYSV shared memory for large pagessrc/os/bsd/vm/globals_bsd.hpp
UseSHMOpenJDK10Obsoleted in JDK12
Expired in JDK13
boollinuxfalseproductUse SYSV shared memory for large pagessrc/os/linux/vm/globals_linux.hpp
UseSIGTRAPOpenJDK10boolppctrueproductAllow trap instructions that make use of SIGTRAP. Use this to switch off all optimizations requiring SIGTRAP.src/cpu/ppc/vm/globals_ppc.hpp
UseSIMDForMemoryOpsOpenJDK10boolaarch64falseproductUse SIMD instructions in generated memory move codesrc/cpu/aarch64/vm/globals_aarch64.hpp
UseSSE42IntrinsicsOpenJDK10boolx86falseproductSSE4.2 versions of intrinsicssrc/cpu/x86/vm/globals_x86.hpp
UseSSEOpenJDK10Obsoleted in JDK15
Expired in JDK16
intxruntime99
range(0, 99)
productHighest supported SSE instructions set on x86/x64src/share/vm/runtime/globals.hpp
UseSemaphoreGCThreadsSynchronizationOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolruntimetruediagnosticUse semaphore synchronization for the GC Threads, instead of synchronization based on mutexessrc/share/vm/runtime/globals.hpp
UseSerialGCOpenJDK10boolruntimefalseproductUse the Serial garbage collectorsrc/share/vm/runtime/globals.hpp
UseSharedSpacesOpenJDK10boolruntimetrueproductUse shared spaces for metadatasrc/share/vm/runtime/globals.hpp
UseSignalChainingOpenJDK10boolruntimetrueproductUse signal-chaining to invoke signal handlers installed by the application (Solaris & Linux only)src/share/vm/runtime/globals.hpp
UseSimulatorCacheOpenJDK10boolaarch64falseproducttell sim to cache memory updates until exclusive op occurssrc/cpu/aarch64/vm/globals_aarch64.hpp
UseSlowPathOpenJDK10boolc1falsedevelopFor debugging: test slow cases by always using themsrc/share/vm/c1/c1_globals.hpp
UseSquareToLenIntrinsicOpenJDK10boolc2falsediagnosticEnables intrinsification of BigInteger.squareToLen()src/share/vm/opto/c2_globals.hpp
UseStackBangingOpenJDK10boolruntimetruedevelopuse stack banging for stack overflow checks (required for proper StackOverflow handling; disable only to measure cost of stackbanging)src/share/vm/runtime/globals.hpp
UseStaticBranchPredictionForUncommonPathsPPC64OpenJDK10boolppcfalseproductUse static branch prediction hints for uncommon paths.src/cpu/ppc/vm/globals_ppc.hpp
UseStaticBranchPredictionInCompareAndSwapPPC64OpenJDK10boolppctrueproductUse static branch prediction hints in CAS operations.src/cpu/ppc/vm/globals_ppc.hpp
UseStoreImmI16OpenJDK10boolx86trueproductUse store immediate 16-bits value instruction on x86src/cpu/x86/vm/globals_x86.hpp
UseStrictFPOpenJDK10boolruntimetruedevelopuse strict fp if modifier strictfp is setsrc/share/vm/runtime/globals.hpp
UseStringDeduplicationOpenJDK10boolruntimefalseproductUse string deduplicationsrc/share/vm/runtime/globals.hpp
UseSuperWordOpenJDK10boolc2trueproductTransform scalar operations into superword operationssrc/share/vm/opto/c2_globals.hpp
UseTLABOpenJDK10boolaarch64c1truedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
UseTLABOpenJDK10boolaarch64c2truedefine_pd_globalsrc/cpu/aarch64/vm/c2_globals_aarch64.hpp
UseTLABOpenJDK10boolarmc1truedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
UseTLABOpenJDK10boolarmc2truedefine_pd_globalsrc/cpu/arm/vm/c2_globals_arm.hpp
UseTLABOpenJDK10boolruntimeproduct_pdUse thread-local object allocationsrc/share/vm/runtime/globals.hpp
UseTLABOpenJDK10boolppcc1truedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
UseTLABOpenJDK10boolppcc2truedefine_pd_globalsrc/cpu/ppc/vm/c2_globals_ppc.hpp
UseTLABOpenJDK10bools390c1truedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
UseTLABOpenJDK10bools390c2truedefine_pd_globalsrc/cpu/s390/vm/c2_globals_s390.hpp
UseTLABOpenJDK10boolsparcc1truedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
UseTLABOpenJDK10boolsparcc2truedefine_pd_globalsrc/cpu/sparc/vm/c2_globals_sparc.hpp
UseTLABOpenJDK10boolx86c1truedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
UseTLABOpenJDK10boolx86c2truedefine_pd_globalsrc/cpu/x86/vm/c2_globals_x86.hpp
UseTLABOpenJDK10boolzerosharktruedefine_pd_globalsrc/cpu/zero/vm/shark_globals_zero.hpp
UseTableRangesOpenJDK10boolc1truedevelopFaster versions of lookup table using rangessrc/share/vm/c1/c1_globals.hpp
UseThreadPrioritiesOpenJDK10boolruntimeproduct_pdUse native thread prioritiessrc/share/vm/runtime/globals.hpp
UseThreadPrioritiesOpenJDK10boolsolarisfalsedefine_pd_globalsrc/os/solaris/vm/globals_solaris.hpp
UseTransparentHugePagesOpenJDK10boollinuxfalseproductUse MADV_HUGEPAGE for large pagessrc/os/linux/vm/globals_linux.hpp
UseTypeProfileOpenJDK10boolaarch64c1falsedefine_pd_globalsrc/cpu/aarch64/vm/c1_globals_aarch64.hpp
UseTypeProfileOpenJDK10boolarmc1falsedefine_pd_globalsrc/cpu/arm/vm/c1_globals_arm.hpp
UseTypeProfileOpenJDK10boolruntimetrueproductCheck interpreter profile for historically monomorphic callssrc/share/vm/runtime/globals.hpp
UseTypeProfileOpenJDK10boolppcc1falsedefine_pd_globalsrc/cpu/ppc/vm/c1_globals_ppc.hpp
UseTypeProfileOpenJDK10bools390c1falsedefine_pd_globalsrc/cpu/s390/vm/c1_globals_s390.hpp
UseTypeProfileOpenJDK10boolsparcc1falsedefine_pd_globalsrc/cpu/sparc/vm/c1_globals_sparc.hpp
UseTypeProfileOpenJDK10boolx86c1falsedefine_pd_globalsrc/cpu/x86/vm/c1_globals_x86.hpp
UseTypeSpeculationOpenJDK10boolc2trueproductSpeculatively propagate types from profilessrc/share/vm/opto/c2_globals.hpp
UseUTCFileTimestampOpenJDK10Obsoleted in JDK11
Expired in JDK12
boolwindowstrueproductAdjust the timestamp returned from stat() to be UTCsrc/os/windows/vm/globals_windows.hpp
UseUnalignedAccessesOpenJDK10boolruntimefalsediagnosticUse unaligned memory accesses in Unsafesrc/share/vm/runtime/globals.hpp
UseUnalignedLoadStoresOpenJDK10boolx86falseproductUse SSE2 MOVDQU instruction for Arraycopysrc/cpu/x86/vm/globals_x86.hpp
UseUniqueSubclassesOpenJDK10boolc2truedevelopNarrow an abstract reference to the unique concrete subclasssrc/share/vm/opto/c2_globals.hpp
UseV8InstrsOnlyOpenJDK6boolsparcfalsedevelopUse SPARC-V8 Compliant instruction subsetsrc/cpu/sparc/vm/globals_sparc.hpp
UseVISOpenJDK10intxsparc99
range(0, 99)
productHighest supported VIS instructions set on Sparcsrc/cpu/sparc/vm/globals_sparc.hpp
UseVectorizedMismatchIntrinsicOpenJDK10boolruntimefalsediagnosticEnables intrinsification of ArraysSupport.vectorizedMismatch()src/share/vm/runtime/globals.hpp
UseXMMForArrayCopyOpenJDK10boolruntimefalseproductUse SSE2 MOVQ instruction for Arraycopysrc/share/vm/runtime/globals.hpp
UseXmmI2DOpenJDK10boolx86falseproductUse SSE2 CVTDQ2PD instruction to convert Integer to Doublesrc/cpu/x86/vm/globals_x86.hpp
UseXmmI2FOpenJDK10boolx86falseproductUse SSE2 CVTDQ2PS instruction to convert Integer to Floatsrc/cpu/x86/vm/globals_x86.hpp
UseXmmLoadAndClearUpperOpenJDK10boolx86trueproductLoad low part of XMM register and clear upper partsrc/cpu/x86/vm/globals_x86.hpp
UseXmmRegToRegMoveAllOpenJDK10boolx86falseproductCopy all XMM register bits when moving value between registerssrc/cpu/x86/vm/globals_x86.hpp
VMThreadHintNoPreemptOpenJDK10Deprecated in JDK11
Obsoleted in JDK12
Expired in JDK13
boolruntimefalseproduct(Solaris only) Give VM thread an extra quantasrc/share/vm/runtime/globals.hpp
VMThreadPriorityOpenJDK10intxruntime-1
range(-1, 127)
productThe native priority at which the VM thread should run (-1 means no change)src/share/vm/runtime/globals.hpp
VMThreadStackSizeOpenJDK10intxaixppc2048define_pd_globalsrc/os_cpu/aix_ppc/vm/globals_aix_ppc.hpp
VMThreadStackSizeOpenJDK10intxbsdx86512define_pd_globalsrc/os_cpu/bsd_x86/vm/globals_bsd_x86.hpp
VMThreadStackSizeOpenJDK10intxbsdzero512define_pd_globalsrc/os_cpu/bsd_zero/vm/globals_bsd_zero.hpp
VMThreadStackSizeOpenJDK10intxlinuxaarch642048define_pd_globalsrc/os_cpu/linux_aarch64/vm/globals_linux_aarch64.hpp
VMThreadStackSizeOpenJDK10intxlinuxarm512define_pd_globalsrc/os_cpu/linux_arm/vm/globals_linux_arm.hpp
VMThreadStackSizeOpenJDK10intxlinuxppc2048define_pd_globalsrc/os_cpu/linux_ppc/vm/globals_linux_ppc.hpp
VMThreadStackSizeOpenJDK10intxlinuxs3901024define_pd_globalsrc/os_cpu/linux_s390/vm/globals_linux_s390.hpp
VMThreadStackSizeOpenJDK10intxlinuxx86512define_pd_globalsrc/os_cpu/linux_x86/vm/globals_linux_x86.hpp
VMThreadStackSizeOpenJDK10intxlinuxzero512define_pd_globalsrc/os_cpu/linux_zero/vm/globals_linux_zero.hpp
VMThreadStackSizeOpenJDK10intxruntimeproduct_pdNon-Java Thread Stack Size (in Kbytes)src/share/vm/runtime/globals.hpp
VMThreadStackSizeOpenJDK10intxsparc512define_pd_globalsrc/cpu/sparc/vm/globals_sparc.hpp
VMThreadStackSizeOpenJDK10intxsolarisx86512define_pd_globalsrc/os_cpu/solaris_x86/vm/globals_solaris_x86.hpp
VMThreadStackSizeOpenJDK10intxwindowsx860define_pd_global// 0 => use system defaultsrc/os_cpu/windows_x86/vm/globals_windows_x86.hpp
ValueMapInitialSizeOpenJDK10intxc111
range(1, NOT_LP64(1*K) LP64_ONLY(32*K))
productInitial size of a value mapsrc/share/vm/c1/c1_globals.hpp
ValueMapMaxLoopSizeOpenJDK10intxc18
range(0, 128)
productmaximum size of a loop optimized by global value numberingsrc/share/vm/c1/c1_globals.hpp
ValueSearchLimitOpenJDK10intxc21000
range(0, max_jint)
productRecursion limit in PhaseMacroExpand::value_from_mem_phisrc/share/vm/opto/c2_globals.hpp
VerboseInternalVMTestsOpenJDK10boolruntimefalsenotproductTurn on logging for internal VM tests.src/share/vm/runtime/globals.hpp
VerboseOpenJDK10boolruntimefalsedevelopPrint additional debugging information from other modessrc/share/vm/runtime/globals.hpp
VerifyActivationFrameSizeOpenJDK10boolruntimefalsedevelopVerify that activation frame didn't become smaller than its minimal sizesrc/share/vm/runtime/globals.hpp
VerifyAdapterCallsOpenJDK10boolruntimetrueInDebugdiagnosticVerify that i2c/c2i adapters are called properlysrc/share/vm/runtime/globals.hpp
VerifyAdapterSharingOpenJDK10boolruntimefalsedevelopVerify that the code for shared adapters is the equivalentsrc/share/vm/runtime/globals.hpp
VerifyAfterGCOpenJDK10boolruntimefalsediagnosticVerify memory system after GCsrc/share/vm/runtime/globals.hpp
VerifyAliasesOpenJDK10boolc2falsedevelopperform extra checks on the results of alias analysissrc/share/vm/opto/c2_globals.hpp
VerifyBeforeExitOpenJDK10boolruntimetrueInDebugdiagnosticVerify system before exitingsrc/share/vm/runtime/globals.hpp
VerifyBeforeGCOpenJDK10boolruntimefalsediagnosticVerify memory system before GCsrc/share/vm/runtime/globals.hpp
VerifyBeforeIterationOpenJDK10boolruntimefalsediagnosticVerify memory system before JVMTI iterationsrc/share/vm/runtime/globals.hpp
VerifyBlockOffsetArrayOpenJDK10boolruntimefalsedevelopDo (expensive) block offset array verificationsrc/share/vm/runtime/globals.hpp
VerifyCodeCacheOpenJDK10boolruntimefalsenotproductVerify code cache on memory allocation/deallocationsrc/share/vm/runtime/globals.hpp
VerifyCompiledCodeOpenJDK10boolruntimefalsedevelopInclude miscellaneous runtime verifications in nmethod code; default off because it disturbs nmethod size heuristicssrc/share/vm/runtime/globals.hpp
VerifyConnectionGraphOpenJDK10boolc2truenotproductVerify Connection Graph construction in Escape Analysissrc/share/vm/opto/c2_globals.hpp
VerifyDUIteratorsOpenJDK10boolc2truenotproductVerify the safety of all iterations of Bi-directional Edgessrc/share/vm/opto/c2_globals.hpp
VerifyDataPointerOpenJDK10boolruntimetrueInDebugdevelopVerify the method data pointer during interpreter profilingsrc/share/vm/runtime/globals.hpp
VerifyDependenciesOpenJDK10boolruntimetrueInDebugdevelopExercise and verify the compilation dependency mechanismsrc/share/vm/runtime/globals.hpp
VerifyDuringGCOpenJDK10boolruntimefalsediagnosticVerify memory system during GC (between phases)src/share/vm/runtime/globals.hpp
VerifyDuringStartupOpenJDK10boolruntimefalsediagnosticVerify memory system before executing any Java code during VM initializationsrc/share/vm/runtime/globals.hpp
VerifyFPUOpenJDK10boolruntimefalsedevelopVerify FPU state (check for NaN's, etc.)src/share/vm/runtime/globals.hpp
VerifyGCLevelOpenJDK10intxruntime0
range(0, 1)
diagnosticGeneration level at which to start +VerifyBefore/AfterGCsrc/share/vm/runtime/globals.hpp
VerifyGCStartAtOpenJDK10uintxruntime0
range(0, max_uintx)
diagnosticGC invoke count where +VerifyBefore/AfterGC kicks insrc/share/vm/runtime/globals.hpp
VerifyGraphEdgesOpenJDK10boolc2falsenotproductVerify Bi-directional Edgessrc/share/vm/opto/c2_globals.hpp
VerifyHashTableKeysOpenJDK10boolc2truenotproductVerify the immutability of keys in the VN hash tablessrc/share/vm/opto/c2_globals.hpp
VerifyIdealNodeCountOpenJDK10boolc2falsenotproductVerify that tracked dead ideal node count is accuratesrc/share/vm/opto/c2_globals.hpp
VerifyInterpreterStackTopOpenJDK10boolarmfalsedevelopVerify interpreter stack top at every stack expansion (AArch64 only)src/cpu/arm/vm/globals_arm.hpp
VerifyIterativeGVNOpenJDK10boolc2falsedevelopVerify Def-Use modifications during sparse Iterative Global Value Numberingsrc/share/vm/opto/c2_globals.hpp
VerifyJNIEnvThreadOpenJDK10boolruntimefalsenotproductVerify JNIEnv.thread == Thread::current() when entering VM from JNIsrc/share/vm/runtime/globals.hpp
VerifyJNIFieldsOpenJDK10boolruntimetrueInDebugdevelopVerify jfieldIDs for instance fieldssrc/share/vm/runtime/globals.hpp
VerifyLastFrameOpenJDK10boolruntimefalsenotproductVerify oops on last frame on entry to VMsrc/share/vm/runtime/globals.hpp
VerifyLoopOptimizationsOpenJDK10boolc2falsenotproductverify major loop optimizationssrc/share/vm/opto/c2_globals.hpp
VerifyMergedCPBytecodesOpenJDK10Obsoleted in JDK16
Expired in JDK17
boolruntimetrueproductVerify bytecodes after RedefineClasses constant pool mergingsrc/share/vm/runtime/globals.hpp
VerifyMethodHandlesOpenJDK10boolruntimetrueInDebugdiagnosticperform extra checks when constructing method handlessrc/share/vm/runtime/globals.hpp
VerifyObjectStartArrayOpenJDK10boolruntimetruediagnosticVerify GC object start array if verify before/aftersrc/share/vm/runtime/globals.hpp
VerifyOopsOpenJDK10boolruntimefalsedevelopDo plausibility checks for oopssrc/share/vm/runtime/globals.hpp
VerifyOptoOopOffsetsOpenJDK10boolc2falsenotproductCheck types of base addresses in field referencessrc/share/vm/opto/c2_globals.hpp
VerifyOptoOpenJDK10boolc2falsenotproductApply more time consuming verification during compilationsrc/share/vm/opto/c2_globals.hpp
VerifyRegisterAllocatorOpenJDK10boolc2falsenotproductVerify Register Allocatorsrc/share/vm/opto/c2_globals.hpp
VerifyRememberedSetsOpenJDK10boolruntimefalsediagnosticVerify GC remembered setssrc/share/vm/runtime/globals.hpp
VerifySharedSpacesOpenJDK10boolruntimefalseproductVerify shared spaces (false for default archive, true for archive specified by -XX:SharedArchiveFile)src/share/vm/runtime/globals.hpp
VerifyStackAtCallsOpenJDK10boolruntimefalsedevelopVerify that the stack pointer is unchanged after callssrc/share/vm/runtime/globals.hpp
VerifyStackOpenJDK10boolruntimefalsedevelopVerify stack of each thread when it is entering a runtime callsrc/share/vm/runtime/globals.hpp
VerifyStringTableAtExitOpenJDK10boolruntimefalsediagnosticverify StringTable contents at exitsrc/share/vm/runtime/globals.hpp
VerifySubSetOpenJDK10ccstrlistruntimeMemory sub-systems to verify when Verify*GC flag(s) are enabled. One or more sub-systems can be specified in a comma separated string. Sub-systems are: threads, heap, symbol_table, string_table, codecache, dictionary, classloader_data_graph, metaspace, jni_handles, codecache_oopsdiagnosticsrc/share/vm/runtime/globals.hpp
VerifyThreadOpenJDK10boolruntimefalsedevelopWatch the thread register for corruption (SPARC only)src/share/vm/runtime/globals.hpp
WalkStackALotOpenJDK10boolruntimefalsenotproductTrace stack (no print) at every exit from the runtime systemsrc/share/vm/runtime/globals.hpp
WarmCallMaxSizeOpenJDK10intxc2999999
range(0, max_intx)
developsize of the largest inlinable methodsrc/share/vm/opto/c2_globals.hpp
WarmCallMaxWorkOpenJDK10intxc2999999
range(0, max_intx)
developexecution time of the largest inlinable methodsrc/share/vm/opto/c2_globals.hpp
WarmCallMinCountOpenJDK10intxc2-1
range(-1, max_intx)
developnumber of calls (per method invocation) to enable inliningsrc/share/vm/opto/c2_globals.hpp
WarmCallMinProfitOpenJDK10intxc2-1
range(-1, max_intx)
developnumber of calls (per method invocation) to enable inliningsrc/share/vm/opto/c2_globals.hpp
WarnOnStalledSpinLockOpenJDK10uintxruntime0notproductPrint warnings for stalled SpinLockssrc/share/vm/runtime/globals.hpp
WhiteBoxAPIOpenJDK10boolruntimefalsediagnosticEnable internal testing APIssrc/share/vm/runtime/globals.hpp
WizardModeOpenJDK10boolruntimefalsedevelopPrint much more debugging informationsrc/share/vm/runtime/globals.hpp
WorkStealingHardSpinsOpenJDK10uintxruntime4096experimentalNumber of iterations in a spin loop between checks on time out of hard spinsrc/share/vm/runtime/globals.hpp
WorkStealingSleepMillisOpenJDK10uintxruntime1experimentalSleep time when sleep is used for yieldssrc/share/vm/runtime/globals.hpp
WorkStealingSpinToYieldRatioOpenJDK10uintxruntime10experimentalRatio of hard spins to calls to yieldsrc/share/vm/runtime/globals.hpp
WorkStealingYieldsBeforeSleepOpenJDK10uintxruntime5000experimentalNumber of yields before a sleep is done during work stealingsrc/share/vm/runtime/globals.hpp
YoungGenerationSizeIncrementOpenJDK10uintxruntime20
range(0, 100)
productAdaptive size percentage change in young generationsrc/share/vm/runtime/globals.hpp
YoungGenerationSizeSupplementDecayOpenJDK10uintxruntime8
range(1, max_uintx)
productDecay factor to YoungedGenerationSizeSupplementsrc/share/vm/runtime/globals.hpp
YoungGenerationSizeSupplementOpenJDK10uintxruntime80
range(0, 100)
productSupplement to YoungedGenerationSizeIncrement used at startupsrc/share/vm/runtime/globals.hpp
YoungPLABSizeOpenJDK10size_truntime4096productSize of young gen promotion LAB's (in HeapWords)src/share/vm/runtime/globals.hpp
ZapEmptyStackFieldsOpenJDK10bools390falsedevelopWrite 0x0101... to empty stack fields. Use this to ease stack debugging.src/cpu/s390/vm/globals_s390.hpp
ZapFillerObjectsOpenJDK10boolruntimetrueInDebugdevelopZap filler objects with 0xDEAFBABEsrc/share/vm/runtime/globals.hpp
ZapHighNonSignificantBitsOpenJDK10boolarmfalsedevelopZap high non-significant bits of values (AArch64 only)src/cpu/arm/vm/globals_arm.hpp
ZapJNIHandleAreaOpenJDK6boolruntimetrueInDebugdevelopZap freed JNI handle space with 0xFEFEFEFEsrc/share/vm/runtime/globals.hpp
ZapMemoryOpenJDK10boolppcfalseproductWrite 0x0101... to empty memory. Use this to ease debugging.src/cpu/ppc/vm/globals_ppc.hpp
ZapResourceAreaOpenJDK10boolruntimetrueInDebugdevelopZap freed resource/arena space with 0xABABABABsrc/share/vm/runtime/globals.hpp
ZapStackSegmentsOpenJDK10boolruntimetrueInDebugnotproductZap allocated/freed stack segments with 0xFADFADEDsrc/share/vm/runtime/globals.hpp
ZapUnusedHeapAreaOpenJDK10boolruntimetrueInDebugdevelopZap unused heap space with 0xBAADBABEsrc/share/vm/runtime/globals.hpp
ZapVMHandleAreaOpenJDK10boolruntimetrueInDebugnotproductZap freed VM handle space with 0xBCBCBCBCsrc/share/vm/runtime/globals.hpp
ZeroTLABOpenJDK10boolruntimefalseproductZero out the newly created TLABsrc/share/vm/runtime/globals.hpp
ZombieALotIntervalOpenJDK10intxruntime5notproductNumber of exits until ZombieALot kicks insrc/share/vm/runtime/globals.hpp
ZombieALotOpenJDK10boolruntimefalsenotproductCreate zombies (non-entrant) at exit from the runtime systemsrc/share/vm/runtime/globals.hpp
batchOpenJDK10disable background compilationXusage.txt
bootclasspath/aOpenJDK10<directories and zip/jar files separated by ;> append to end of bootstrap class pathXusage.txt
bootclasspath/pOpenJDK10<directories and zip/jar files separated by ;> prepend in front of bootstrap class pathXusage.txt
bootclasspathOpenJDK10<directories and zip/jar files separated by ;> set search path for bootstrap classes and resourcesXusage.txt
check:jniOpenJDK10perform additional checks for JNI functionsXusage.txt
futureOpenJDK10enable strictest checks, anticipating future defaultXusage.txt
hashCodeOpenJDK10intxruntime5experimental(Unstable) select hashCode generation algorithmsrc/share/vm/runtime/globals.hpp
intOpenJDK10interpreted mode execution onlyXusage.txt
logOpenJDK10<opts>control JVM logging, use -Xlog:help for detailsXusage.txt
mixedOpenJDK10mixed mode execution (default)Xusage.txt
msOpenJDK10<size>set initial Java heap sizeXusage.txt
mxOpenJDK10<size>set maximum Java heap sizeXusage.txt
noclassgcOpenJDK10disable class garbage collectionXusage.txt
profOpenJDK6output cpu profiling data (deprecated)Xusage.txt
rsOpenJDK10reduce use of OS signals by Java/VM (see documentation)Xusage.txt
share:autoOpenJDK10use shared class data if possible (default)Xusage.txt
share:offOpenJDK10do not attempt to use shared class dataXusage.txt
share:onOpenJDK10
require using shared class data, otherwise fail.

The -X options are non-standard and subject to change without notice.
Xusage.txt
ssOpenJDK10<size>set java thread stack sizeXusage.txt