VM Options Explorer - JDK16 HotSpot

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NameSinceDeprecatedTypeOSCPUComponentDefaultAvailabilityDescriptionDefined in
SinceDeprecatedTypeOSCPUComponentAvailability
AOTLibraryJDK9ccstrlistruntimeNULLproductEXPERIMENTALshare/runtime/globals.hpp
AVX3ThresholdJDK11intx864096
range(0, max_jint)
productDIAGNOSTICcpu/x86/globals_x86.hpp
AbortVMOnCompilationFailureJDK11boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
AbortVMOnExceptionMessageJDK6ccstrruntimeNULLproductDIAGNOSTICshare/runtime/globals.hpp
AbortVMOnExceptionJDK6ccstrruntimeNULLproductDIAGNOSTICshare/runtime/globals.hpp
AbortVMOnSafepointTimeoutJDK11boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
AbortVMOnVMOperationTimeoutDelayJDK11intxruntime1000
range(0, max_intx)
productDIAGNOSTICshare/runtime/globals.hpp
AbortVMOnVMOperationTimeoutJDK11boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
ActiveProcessorCountJDK10intgc-1productSpecify the CPU count the VM should use and report as activeshare/gc/shared/gc_globals.hpp
AdaptiveSizeDecrementScaleFactorJDK6uintxgc4
range(1, max_uintx)
productAdaptive size scale down factor for shrinkingshare/gc/shared/gc_globals.hpp
AdaptiveSizeMajorGCDecayTimeScaleJDK6uintxgc10
range(0, max_uintx)
productTime scale over which major costs decayshare/gc/shared/gc_globals.hpp
AdaptiveSizePolicyCollectionCostMarginJDK6uintxgc50
range(0, 100)
productIf collection costs are within margin, reduce both by full deltashare/gc/shared/gc_globals.hpp
AdaptiveSizePolicyInitializingStepsJDK6uintxgc20
range(0, max_uintx)
productNumber of steps where heuristics is used before data is usedshare/gc/shared/gc_globals.hpp
AdaptiveSizePolicyOutputIntervalJDK6uintxgc0
range(0, max_uintx)
productCollection interval for printing information; zero means nevershare/gc/shared/gc_globals.hpp
AdaptiveSizePolicyReadyThresholdJDK6uintxgc5developNumber of collections before the adaptive sizing is startedshare/gc/shared/gc_globals.hpp
AdaptiveSizePolicyWeightJDK6uintxgc10
range(0, 100)
productWeight given to exponential resizing, between 0 and 100share/gc/shared/gc_globals.hpp
AdaptiveSizeThroughPutPolicyJDK6uintxgc0
range(0, 1)
productPolicy for changing generation size for throughput goalsshare/gc/shared/gc_globals.hpp
AdaptiveTimeWeightJDK6uintxgc25
range(0, 100)
productWeight given to time in adaptive policy, between 0 and 100share/gc/shared/gc_globals.hpp
AdjustStackSizeForTLSJDK14boollinuxfalseproductIncrease the thread stack size to include space for glibc static thread-local storage (TLS) if trueos/linux/globals_linux.hpp
AggressiveHeapJDK10boolgcfalseproductOptimize heap options for long-running memory intensive appsshare/gc/shared/gc_globals.hpp
AggressiveUnboxingJDK8boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
AliasLevelJDK6intxc23
range(0, 3)
product0 for no aliasing, 1 for oop/field/static/array split,
2 for class split, 3 for unique instances
share/opto/c2_globals.hpp
AlignVectorJDK7boolc2trueproductPerform vector store/load alignment in loopshare/opto/c2_globals.hpp
AllocateHeapAtJDK10ccstrruntimeNULLproductPath to the directoy where a temporary file will be created to use as the backing store for Java Heap.share/runtime/globals.hpp
AllocateInstancePrefetchLinesJDK6intxruntime1
range(1, 64)
productNumber of lines to prefetch ahead of instance allocation pointershare/runtime/globals.hpp
AllocateOldGenAtJDK12ccstrruntimeNULLproductEXPERIMENTALshare/runtime/globals.hpp
AllocatePrefetchDistanceJDK6intxruntime-1productDistance to prefetch ahead of allocation pointer. -1: use system-specific value (automatically determinedshare/runtime/globals.hpp
AllocatePrefetchInstrJDK6intxruntime0productSelect instruction to prefetch ahead of allocation pointershare/runtime/globals.hpp
AllocatePrefetchLinesJDK6intxruntime3
range(1, 64)
productNumber of lines to prefetch ahead of array allocation pointershare/runtime/globals.hpp
AllocatePrefetchStepSizeJDK6intxruntime16
range(1, 512)
productStep size in bytes of sequential prefetch instructionsshare/runtime/globals.hpp
AllocatePrefetchStyleJDK6intxruntime1
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
share/runtime/globals.hpp
AllowArchivingWithJavaAgentJDK12boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
AllowExtshmJDK9boolaixfalseproductAllow VM to run with EXTSHM=ON.os/aix/globals_aix.hpp
AllowParallelDefineClassJDK6boolruntimefalseproductAllow parallel defineClass requests for class loaders registering as parallel capableshare/runtime/globals.hpp
AllowRedefinitionToAddDeleteMethodsJDK13Deprecated in JDK13boolruntimefalseproduct(Deprecated) Allow redefinition to add and delete private static or final methods for compatibility with old releasesshare/runtime/globals.hpp
AllowUserSignalHandlersJDK6boolruntimefalseproductDo not complain if the application installs signal handlers (Unix only)share/runtime/globals.hpp
AllowVectorizeOnDemandJDK9boolc2trueproductGlobally supress vectorization set in VectorizeMethodshare/opto/c2_globals.hpp
AlwaysActAsServerClassMachineJDK6boolgcfalseproductAlways act like a server-class machineshare/gc/shared/gc_globals.hpp
AlwaysAtomicAccessesJDK9boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
AlwaysCompileLoopMethodsJDK6boolruntimefalseproductWhen using recompilation, never interpret methods containing loopsshare/runtime/globals.hpp
AlwaysIncrementalInlineJDK7boolc2falsedevelopdo all inlining incrementallyshare/opto/c2_globals.hpp
AlwaysLockClassLoaderJDK6boolruntimefalseproductRequire the VM to acquire the class loader lock before calling loadClass() even for class loaders registering as parallel capableshare/runtime/globals.hpp
AlwaysPreTouchJDK6boolgcfalseproductForce all freshly committed pages to be pre-touchedshare/gc/shared/gc_globals.hpp
AlwaysRestoreFPUJDK6boolruntimefalseproductRestore the FPU control word after every JNI call (expensive)share/runtime/globals.hpp
AlwaysSafeConstructorsJDK9boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
AlwaysTenureJDK6boolgcfalseproductAlways tenure objects in eden (ParallelGC only)share/gc/shared/gc_globals.hpp
ArchiveClassesAtExitJDK13ccstrruntimeNULLproductThe path and name of the dynamic archive fileshare/runtime/globals.hpp
ArchiveRelocationModeJDK14intxruntime0
range(0, 2)
productDIAGNOSTICshare/runtime/globals.hpp
ArrayAllocatorMallocLimitJDK7size_truntime(size_t)-1productEXPERIMENTALshare/runtime/globals.hpp
ArrayCopyLoadStoreMaxElemJDK9intxc28
range(0, max_intx)
productMaximum number of arraycopy elements inlined as a sequence ofloads/storesshare/opto/c2_globals.hpp
AssertOnSuspendWaitFailureJDK6boolruntimefalseproductAssert/Guarantee on external suspend wait failureshare/runtime/globals.hpp
AssertRangeCheckEliminationJDK8boolc1falsedevelopAssert Range Check Eliminationshare/c1/c1_globals.hpp
AsyncDeflationIntervalJDK15intxruntime250
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
AutoBoxCacheMaxJDK6intxc2128
range(0, max_jint)
productSets max value cached by the java.lang.Integer autobox cacheshare/opto/c2_globals.hpp
AvoidUnalignedAccessesJDK9boolaarch64falseproductAvoid generating unaligned memory accessescpu/aarch64/globals_aarch64.hpp
BCEATraceLevelJDK6intxruntime0
range(0, 3)
productHow much tracing to do of bytecode escape analysis estimates (0-3)share/runtime/globals.hpp
BackgroundCompilationJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
BackgroundCompilationJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
BackgroundCompilationJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
BackgroundCompilationJDK6boolruntimeproduct_pdA thread requesting compilation is not blocked during compilationshare/runtime/globals.hpp
BackgroundCompilationJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
BackgroundCompilationJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
BackgroundCompilationJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
BailoutAfterHIRJDK6boolc1falsedevelopbailout of compilation after building of HIRshare/c1/c1_globals.hpp
BailoutAfterLIRJDK6boolc1falsedevelopbailout of compilation after building of LIRshare/c1/c1_globals.hpp
BailoutOnExceptionHandlersJDK6boolc1falsedevelopbailout of compilation for methods with exception handlersshare/c1/c1_globals.hpp
BailoutToInterpreterForThrowsJDK6boolc2falsedevelopCompiled methods which throws/catches exceptions will be deopt and intp.share/opto/c2_globals.hpp
BaseFootPrintEstimateJDK6size_tgc256*M
range(0, max_uintx)
productEstimate of footprint other than Java Heapshare/gc/shared/gc_globals.hpp
BciProfileWidthJDK6intxruntime2developNumber of return bci's to record in ret profileshare/runtime/globals.hpp
BiasedLockingBulkRebiasThresholdJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
intxruntime20
range(0, max_intx)
product(Deprecated) Threshold of number of revocations per type to try to rebias all objects in the heap of that typeshare/runtime/globals.hpp
BiasedLockingBulkRevokeThresholdJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
intxruntime40
range(0, max_intx)
product(Deprecated) Threshold of number of revocations per type to permanently revoke biases of all objects in the heap of that typeshare/runtime/globals.hpp
BiasedLockingDecayTimeJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
intxruntime25000
range(500, max_intx)
product(Deprecated) Decay time (in milliseconds) to re-enable bulk rebiasing of a type after previous bulk rebiasshare/runtime/globals.hpp
BiasedLockingStartupDelayJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
intxruntime0
range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran)))
product(Deprecated) Number of milliseconds to wait before enabling biased lockingshare/runtime/globals.hpp
BinarySwitchThresholdJDK6intxruntime5developMinimal number of lookupswitch entries for rewriting to binary switchshare/runtime/globals.hpp
BlockLayoutByFrequencyJDK6boolc2trueproductUse edge frequencies to drive block orderingshare/opto/c2_globals.hpp
BlockLayoutMinDiamondPercentageJDK6intxc220
range(0, 100)
productMiniumum %% of a successor (predecessor) for which block layout a will allow a fork (join) in a single chainshare/opto/c2_globals.hpp
BlockLayoutRotateLoopsJDK6boolc2trueproductAllow back branches to be fall throughs in the block layoutshare/opto/c2_globals.hpp
BlockZeroingLowLimitJDK6intxaarch64256
range(1, max_jint)
productMinimum size in bytes when block zeroing will be usedcpu/aarch64/globals_aarch64.hpp
BootstrapJVMCIJDK9booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
BreakAtNodeJDK6intxc20notproductBreak at construction of this Node (either _idx or _debug_idx)share/opto/c2_globals.hpp
BreakAtWarningJDK6boolruntimefalsedevelopExecute breakpoint upon encountering VM warningshare/runtime/globals.hpp
BytecodeVerificationLocalJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
BytecodeVerificationRemoteJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
C1BreakpointJDK6boolc1falsedevelopSets a breakpoint at entry of each compiled methodshare/c1/c1_globals.hpp
C1InlineStackLimitJDK15intxc110
range(0, max_jint)
productinlining only allowed for methods which don't exceed this number of expression stack and local slotsshare/c1/c1_globals.hpp
C1MaxInlineLevelJDK15intxc19
range(0, max_jint)
productThe maximum number of nested calls that are inlined by C1share/c1/c1_globals.hpp
C1MaxInlineSizeJDK15intxc135
range(0, max_jint)
productThe maximum bytecode size of a method to be inlined by C1share/c1/c1_globals.hpp
C1MaxRecursiveInlineLevelJDK15intxc11
range(0, max_jint)
productmaximum number of nested recursive calls that are inlined by C1share/c1/c1_globals.hpp
C1MaxTrivialSizeJDK15intxc16
range(0, max_jint)
productThe maximum bytecode size of a trivial method to be inlined by C1share/c1/c1_globals.hpp
C1OptimizeVirtualCallProfilingJDK6boolc1trueproductUse CHA and exact type results at call sites when updating MDOsshare/c1/c1_globals.hpp
C1ProfileBranchesJDK6boolc1trueproductProfile branches when generating code for updating MDOsshare/c1/c1_globals.hpp
C1ProfileCallsJDK6boolc1trueproductProfile calls when generating code for updating MDOsshare/c1/c1_globals.hpp
C1ProfileCheckcastsJDK6boolc1trueproductProfile checkcasts when generating code for updating MDOsshare/c1/c1_globals.hpp
C1ProfileInlinedCallsJDK6boolc1trueproductProfile inlined calls when generating code for updating MDOsshare/c1/c1_globals.hpp
C1ProfileVirtualCallsJDK6boolc1trueproductProfile virtual calls when generating code for updating MDOsshare/c1/c1_globals.hpp
C1UpdateMethodDataJDK6boolc1trueInTieredproductUpdate MethodData*s in Tier1-generated codeshare/c1/c1_globals.hpp
CIBreakAtOSRJDK6intxruntime-1developThe id of osr compilation to break atshare/runtime/globals.hpp
CIBreakAtJDK6intxruntime-1developThe id of compilation to break atshare/runtime/globals.hpp
CICompileNativesJDK6boolruntimetruedevelopcompile native methods if supported by the compilershare/runtime/globals.hpp
CICompileOSRJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
CICompileOSRJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
CICompileOSRJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
CICompileOSRJDK6boolruntimedevelop_pdcompile on stack replacement methods if supported by the compilershare/runtime/globals.hpp
CICompileOSRJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
CICompileOSRJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
CICompileOSRJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
CICompilerCountPerCPUJDK6boolruntimefalseproduct1 compiler thread for log(N CPUs)share/runtime/globals.hpp
CICompilerCountJDK6intxruntimeCI_COMPILER_COUNT
range(0, max_jint)
productNumber of compiler threads to runshare/runtime/globals.hpp
CICountOSRJDK6boolruntimefalsedevelopuse a separate counter when assigning ids to osr compilationsshare/runtime/globals.hpp
CICrashAtJDK8intxruntime-1notproductid of compilation to trigger assert in compiler thread for the purpose of testing, e.g. generation of replay datashare/runtime/globals.hpp
CIObjectFactoryVerifyJDK6boolruntimefalsenotproductenable potentially expensive verification in ciObjectFactoryshare/runtime/globals.hpp
CIPrintCompileQueueJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
CIPrintCompilerNameJDK6boolruntimefalsedevelopwhen CIPrint is active, print the name of the active compilershare/runtime/globals.hpp
CIPrintMethodCodesJDK6boolruntimefalsedevelopprint method bytecodes of the compiled codeshare/runtime/globals.hpp
CIPrintRequestsJDK6boolruntimefalsedevelopdisplay every request for compilationshare/runtime/globals.hpp
CIPrintTypeFlowJDK6boolruntimefalsedevelopprint the results of ciTypeFlow analysisshare/runtime/globals.hpp
CIStartOSRJDK6intxruntime0developThe id of the first osr compilation to permit (CICountOSR must be on)share/runtime/globals.hpp
CIStartJDK6intxruntime0developThe id of the first compilation to permitshare/runtime/globals.hpp
CIStopOSRJDK6intxruntimemax_jintdevelopThe id of the last osr compilation to permit (CICountOSR must be on)share/runtime/globals.hpp
CIStopJDK6intxruntimemax_jintdevelopThe id of the last compilation to permitshare/runtime/globals.hpp
CITimeEachJDK6boolruntimefalsedevelopdisplay timing information after each successful compilationshare/runtime/globals.hpp
CITimeVerboseJDK9boolruntimefalsedevelopbe more verbose in compilation timingsshare/runtime/globals.hpp
CITimeJDK6boolruntimefalseproductcollect timing information for compilationshare/runtime/globals.hpp
CITraceTypeFlowJDK6boolruntimefalsedevelopdetailed per-bytecode tracing of ciTypeFlow analysisshare/runtime/globals.hpp
CSEArrayLengthJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
CSEArrayLengthJDK6boolarmtruedefine_pd_globalcpu/arm/c1_globals_arm.hpp
CSEArrayLengthJDK6boolc1develop_pdCreate separate nodes for length in array accessesshare/c1/c1_globals.hpp
CSEArrayLengthJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
CSEArrayLengthJDK6bools390truedefine_pd_globalcpu/s390/c1_globals_s390.hpp
CSEArrayLengthJDK6boolx86falsedefine_pd_globalcpu/x86/c1_globals_x86.hpp
CalculateClassFingerprintJDK10boolruntimefalseproductCalculate class fingerprintshare/runtime/globals.hpp
CanonicalizeNodesJDK6boolc1truedevelopCanonicalize graph nodesshare/c1/c1_globals.hpp
CheckCompressedOopsJDK6boolruntimetruenotproductGenerate checks in encoding/decoding code in debug VMshare/runtime/globals.hpp
CheckIntrinsicsJDK9boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
CheckJNICallsJDK6boolruntimefalseproductVerify all arguments to JNI callsshare/runtime/globals.hpp
CheckMemoryInitializationJDK6boolruntimefalsenotproductCheck memory initializationshare/runtime/globals.hpp
CheckUnhandledOopsJDK6boolruntimefalsedevelopCheck for unhandled oops in VM codeshare/runtime/globals.hpp
CheckZapUnusedHeapAreaJDK6boolruntimefalsedevelopCheck zapping of unused heap spaceshare/runtime/globals.hpp
ClassUnloadingWithConcurrentMarkJDK8boolruntimetrueproductDo unloading of classes with a concurrent marking cycleshare/runtime/globals.hpp
ClassUnloadingJDK6boolruntimetrueproductDo unloading of classesshare/runtime/globals.hpp
CleanChunkPoolAsyncJDK6boolruntimetruedevelopClean the chunk pool asynchronouslyshare/runtime/globals.hpp
ClipInliningJDK6boolruntimetrueproductClip inlining if aggregate method exceeds DesiredMethodLimitshare/runtime/globals.hpp
CodeCacheExpansionSizeJDK6intxaarch6432*Kdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
CodeCacheExpansionSizeJDK6size_tarm32*Kdefine_pd_globalcpu/arm/c2_globals_arm.hpp
CodeCacheExpansionSizeJDK6uintxcompiler32*Kdefine_pd_globalshare/compiler/compiler_globals.hpp
CodeCacheExpansionSizeJDK6uintxruntimeproduct_pdCode cache expansion size (in bytes)share/runtime/globals.hpp
CodeCacheExpansionSizeJDK6uintxppc32*Kdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
CodeCacheExpansionSizeJDK6uintxs39064*Kdefine_pd_globalcpu/s390/c2_globals_s390.hpp
CodeCacheExpansionSizeJDK6uintxx8632*Kdefine_pd_globalcpu/x86/c1_globals_x86.hpp
CodeCacheMinBlockLengthJDK6uintxaarch641define_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
CodeCacheMinBlockLengthJDK6uintxarm6define_pd_globalcpu/arm/c2_globals_arm.hpp
CodeCacheMinBlockLengthJDK6uintxcompiler1define_pd_globalshare/compiler/compiler_globals.hpp
CodeCacheMinBlockLengthJDK6uintxruntimeproduct_pdDIAGNOSTICshare/runtime/globals.hpp
CodeCacheMinBlockLengthJDK6uintxppc1define_pd_globalcpu/ppc/c1_globals_ppc.hpp
CodeCacheMinBlockLengthJDK6uintxs3904define_pd_globalcpu/s390/c2_globals_s390.hpp
CodeCacheMinBlockLengthJDK6uintxx861define_pd_globalcpu/x86/c1_globals_x86.hpp
CodeCacheMinimumUseSpaceJDK8uintxaarch64400*Kdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
CodeCacheMinimumUseSpaceJDK8size_tarm400*Kdefine_pd_globalcpu/arm/c2_globals_arm.hpp
CodeCacheMinimumUseSpaceJDK8uintxcompiler200*Kdefine_pd_globalshare/compiler/compiler_globals.hpp
CodeCacheMinimumUseSpaceJDK8uintxruntimedevelop_pdMinimum code cache size (in bytes) required to start VM.share/runtime/globals.hpp
CodeCacheMinimumUseSpaceJDK8uintxppc400*Kdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
CodeCacheMinimumUseSpaceJDK8uintxs390400*Kdefine_pd_globalcpu/s390/c2_globals_s390.hpp
CodeCacheMinimumUseSpaceJDK8uintxx86400*Kdefine_pd_globalcpu/x86/c1_globals_x86.hpp
CodeCacheSegmentSizeJDK6uintxaarch6464 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.cpu/aarch64/globals_aarch64.hpp
CodeCacheSegmentSizeJDK6uintxarm64 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.cpu/arm/globals_arm.hpp
CodeCacheSegmentSizeJDK6uintxruntimedevelop_pdCode cache segment size (in bytes) - smallest unit of allocationshare/runtime/globals.hpp
CodeCacheSegmentSizeJDK6uintxppc128define_pd_globalcpu/ppc/globals_ppc.hpp
CodeCacheSegmentSizeJDK6uintxs390256define_pd_globalcpu/s390/globals_s390.hpp
CodeCacheSegmentSizeJDK6uintxx8664 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.cpu/x86/globals_x86.hpp
CodeCacheSegmentSizeJDK6uintxzero64 TIERED_ONLY(+64)define_pd_global// Tiered compilation has large code-entry alignment.cpu/zero/globals_zero.hpp
CodeEntryAlignmentJDK6intxaarch6464define_pd_globalcpu/aarch64/globals_aarch64.hpp
CodeEntryAlignmentJDK6intxarm16define_pd_globalcpu/arm/globals_arm.hpp
CodeEntryAlignmentJDK6intxruntimedevelop_pdCode entry alignment for generated code (in bytes)share/runtime/globals.hpp
CodeEntryAlignmentJDK6intxppc128define_pd_globalcpu/ppc/globals_ppc.hpp
CodeEntryAlignmentJDK6intxs39064define_pd_globalcpu/s390/globals_s390.hpp
CodeEntryAlignmentJDK6intxx8616define_pd_globalcpu/x86/globals_x86.hpp
CodeEntryAlignmentJDK6intxzero32define_pd_globalcpu/zero/globals_zero.hpp
CollectIndexSetStatisticsJDK6boolruntimefalsenotproductCollect information about IndexSetsshare/runtime/globals.hpp
CommentedAssemblyJDK6boolc1trueInDebugdevelopShow extra info in PrintNMethods outputshare/c1/c1_globals.hpp
CompactStringsJDK9boolaarch64truedefine_pd_globalcpu/aarch64/globals_aarch64.hpp
CompactStringsJDK9boolarmfalsedefine_pd_globalcpu/arm/globals_arm.hpp
CompactStringsJDK9boolruntimeproduct_pdEnable Strings to use single byte chars in backing storeshare/runtime/globals.hpp
CompactStringsJDK9boolppctruedefine_pd_globalcpu/ppc/globals_ppc.hpp
CompactStringsJDK9bools390truedefine_pd_globalcpu/s390/globals_s390.hpp
CompactStringsJDK9boolx86truedefine_pd_globalcpu/x86/globals_x86.hpp
CompactStringsJDK9boolzerofalsedefine_pd_globalcpu/zero/globals_zero.hpp
CompilationModeJDK14ccstrruntimedefaultproductCompilation modes: default: normal tiered compilation; quick-only: C1-only mode; high-only: C2/JVMCI-only mode; high-only-quick-internal: C2/JVMCI-only mode, with JVMCI compiler compiled with C1.share/runtime/globals.hpp
CompileCommandFileJDK6ccstrruntimeNULLproductRead compiler commands from this file [.hotspot_compiler]share/runtime/globals.hpp
CompileCommandJDK6ccstrlistruntimePrepend to .hotspot_compiler; e.g. log,java/lang/String.productshare/runtime/globals.hpp
CompileOnlyJDK6ccstrlistruntimeList of methods (pkg/class.name) to restrict compilation toproductshare/runtime/globals.hpp
CompileThresholdScalingJDK9doubleruntime1.0
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.share/runtime/globals.hpp
CompileThresholdJDK6intxaarch641500define_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
CompileThresholdJDK6intxarm10000define_pd_globalcpu/arm/c2_globals_arm.hpp
CompileThresholdJDK6intxcompiler0define_pd_globalshare/compiler/compiler_globals.hpp
CompileThresholdJDK6intxruntimeproduct_pdnumber of interpreted method invocations before (re-)compilingshare/runtime/globals.hpp
CompileThresholdJDK6intxppc1000define_pd_globalcpu/ppc/c1_globals_ppc.hpp
CompileThresholdJDK6intxs39010000define_pd_globalcpu/s390/c2_globals_s390.hpp
CompileThresholdJDK6intxx861500define_pd_globalcpu/x86/c1_globals_x86.hpp
CompilerDirectivesFileJDK9ccstrruntimeNULLproductDIAGNOSTICshare/runtime/globals.hpp
CompilerDirectivesIgnoreCompileCommandsJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
CompilerDirectivesLimitJDK9intruntime50productDIAGNOSTICshare/runtime/globals.hpp
CompilerDirectivesPrintJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
CompilerThreadPriorityJDK6intxruntime-1
range(min_jint, max_jint)
productThe native priority at which compiler threads should run (-1 means no change)share/runtime/globals.hpp
CompilerThreadStackSizeJDK6intxaixppc4096define_pd_globalos_cpu/aix_ppc/globals_aix_ppc.hpp
CompilerThreadStackSizeJDK6intxbsdx86512define_pd_globalos_cpu/bsd_x86/globals_bsd_x86.hpp
CompilerThreadStackSizeJDK6intxbsdzero0define_pd_globalos_cpu/bsd_zero/globals_bsd_zero.hpp
CompilerThreadStackSizeJDK6intxlinuxaarch642048define_pd_globalos_cpu/linux_aarch64/globals_linux_aarch64.hpp
CompilerThreadStackSizeJDK6intxlinuxarm512define_pd_globalos_cpu/linux_arm/globals_linux_arm.hpp
CompilerThreadStackSizeJDK6intxlinuxppc4096define_pd_globalos_cpu/linux_ppc/globals_linux_ppc.hpp
CompilerThreadStackSizeJDK6intxlinuxs3902048define_pd_globalos_cpu/linux_s390/globals_linux_s390.hpp
CompilerThreadStackSizeJDK6intxlinuxx86512define_pd_globalos_cpu/linux_x86/globals_linux_x86.hpp
CompilerThreadStackSizeJDK6intxlinuxzero0define_pd_globalos_cpu/linux_zero/globals_linux_zero.hpp
CompilerThreadStackSizeJDK6intxruntimeproduct_pdCompiler Thread Stack Size (in Kbytes)share/runtime/globals.hpp
CompilerThreadStackSizeJDK6intxwindowsaarch640define_pd_globalos_cpu/windows_aarch64/globals_windows_aarch64.hpp
CompilerThreadStackSizeJDK6intxwindowsx860define_pd_globalos_cpu/windows_x86/globals_windows_x86.hpp
CompressedClassSpaceSizeJDK8size_truntime1*G
range(1*M, 3*G)
productMaximum size of class area in Metaspace when compressed class pointers are usedshare/runtime/globals.hpp
ComputeExactFPURegisterUsageJDK6boolc1truedevelopCompute additional live set for fpu registers to simplify fpu stack merge (Intel only)share/c1/c1_globals.hpp
ConcGCThreadsJDK6uintgc0productNumber of threads concurrent gc will useshare/gc/shared/gc_globals.hpp
ConcGCYieldTimeoutJDK6intxgc0
range(0, max_intx)
developIf non-zero, assert that GC threads yield within this number of millisecondsshare/gc/shared/gc_globals.hpp
ConditionalMoveLimitJDK6intxaarch643define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
ConditionalMoveLimitJDK6intxarm4define_pd_globalcpu/arm/c2_globals_arm.hpp
ConditionalMoveLimitJDK6intxc2product_pdLimit of ops to make speculative when using CMOVEshare/opto/c2_globals.hpp
ConditionalMoveLimitJDK6intxppc3define_pd_globalcpu/ppc/c2_globals_ppc.hpp
ConditionalMoveLimitJDK6intxs3904define_pd_globalcpu/s390/c2_globals_s390.hpp
ConditionalMoveLimitJDK6intxx863define_pd_globalcpu/x86/c2_globals_x86.hpp
ContendedPaddingWidthJDK8intxruntime128
range(0, 8192)
productHow many bytes to pad the fields/classes marked @Contended withshare/runtime/globals.hpp
ControlIntrinsicJDK16ccstrlistruntimeDIAGNOSTICproductControl intrinsics using a list of +/- (internal) names, separated by commasshare/runtime/globals.hpp
ConvertCmpD2CmpFJDK6boolc2truedevelopConvert cmpD to cmpF when one input is constant in float rangeshare/opto/c2_globals.hpp
ConvertFloat2IntClippingJDK6boolc2truedevelopConvert float2int clipping idiom to integer clippingshare/opto/c2_globals.hpp
CountBytecodesJDK6boolruntimefalsedevelopCount number of bytecodes executedshare/runtime/globals.hpp
CountCompiledCallsJDK6boolruntimefalsedevelopCount method invocationsshare/runtime/globals.hpp
CountJNICallsJDK6boolruntimefalsedevelopCount jni method invocationsshare/runtime/globals.hpp
CountJVMCallsJDK6boolruntimefalsenotproductCount jvm method invocationsshare/runtime/globals.hpp
CountLinearScanJDK6boolc1falsedevelopcollect statistic counters during LinearScanshare/c1/c1_globals.hpp
CountRemovableExceptionsJDK6boolruntimefalsenotproductCount exceptions that could be replaced by branches due to inliningshare/runtime/globals.hpp
CountRuntimeCallsJDK6boolruntimefalsenotproductCount VM runtime callsshare/runtime/globals.hpp
CounterDecayMinIntervalLengthJDK6intxruntime500developThe minimum interval (in milliseconds) between invocation of CounterDecayshare/runtime/globals.hpp
CounterHalfLifeTimeJDK6intxruntime30developHalf-life time of invocation counters (in seconds)share/runtime/globals.hpp
CrashGCForDumpingJavaThreadJDK6boolruntimefalsenotproductManually make GC thread crash then dump java stack trace; Test onlyshare/runtime/globals.hpp
CrashOnOutOfMemoryErrorJDK8boolruntimefalseproductJVM aborts, producing an error log and core/mini dump, on the first occurrence of an out-of-memory errorshare/runtime/globals.hpp
CreateCoredumpOnCrashJDK9boolruntimetrueproductCreate core/mini dump on VM fatal errorshare/runtime/globals.hpp
CriticalJNINativesJDK6boolruntimetrueproductCheck for critical JNI entry pointsshare/runtime/globals.hpp
DSCR_DPFD_PPC64JDK9uint64_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 touchcpu/ppc/globals_ppc.hpp
DSCR_PPC64JDK9uint64_tppc(uint64_t)-1productPower8 or later: Specify encoded value for Data Stream Control Registercpu/ppc/globals_ppc.hpp
DSCR_URG_PPC64JDK9uint64_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 touchcpu/ppc/globals_ppc.hpp
DTraceAllocProbesJDK6boolruntimefalseproductEnable dtrace probes for object allocationshare/runtime/globals.hpp
DTraceMethodProbesJDK6boolruntimefalseproductEnable dtrace probes for method-entry and method-exitshare/runtime/globals.hpp
DTraceMonitorProbesJDK6boolruntimefalseproductEnable dtrace probes for monitor eventsshare/runtime/globals.hpp
DebugDeoptimizationJDK6boolruntimefalsedevelopTracing various information while debugging deoptimizationshare/runtime/globals.hpp
DebugInlinedCallsJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
DebugNonSafepointsJDK6boolruntimetrueInDebugproductDIAGNOSTICshare/runtime/globals.hpp
DebugVtablesJDK6boolruntimefalsedevelopadd debugging code to vtable dispatchshare/runtime/globals.hpp
DeferInitialCardMarkJDK6boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
DeoptC1JDK6boolc1truedevelopUse deoptimization in C1share/c1/c1_globals.hpp
DeoptimizeALotIntervalJDK6intxruntime5notproductNumber of exits until DeoptimizeALot kicks inshare/runtime/globals.hpp
DeoptimizeALotJDK6boolruntimefalsedevelopDeoptimize at every exit from the runtime systemshare/runtime/globals.hpp
DeoptimizeNMethodBarriersALotJDK15boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
DeoptimizeOnlyAtJDK6ccstrlistruntimeA comma separated list of bcis to deoptimize atnotproductshare/runtime/globals.hpp
DeoptimizeRandomJDK6boolruntimefalsedevelopDeoptimize random frames on random exit from the runtime systemshare/runtime/globals.hpp
DesiredMethodLimitJDK6intxruntime8000developThe desired maximum method size (in bytecodes) after inliningshare/runtime/globals.hpp
DiagnoseSyncOnPrimitiveWrappersJDK16intxruntime0
range(0, 2)
productDIAGNOSTICshare/runtime/globals.hpp
DisableAttachMechanismJDK6boolruntimefalseproductDisable mechanism that allows tools to attach to this VMshare/runtime/globals.hpp
DisableExplicitGCJDK6boolgcfalseproductIgnore calls to System.gc()share/gc/shared/gc_globals.hpp
DisableIntrinsicJDK6ccstrlistruntimeDIAGNOSTICproductdo not expand intrinsics whose (internal) names appear hereshare/runtime/globals.hpp
DisablePrimordialThreadGuardPagesJDK8boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
DisableStartThreadJDK6boolruntimefalsedevelopDisable starting of additional Java threads (for debugging only)share/runtime/globals.hpp
DisplayVMOutputToStderrJDK6boolruntimefalseproductIf DisplayVMOutput is true, display all VM output to stderrshare/runtime/globals.hpp
DisplayVMOutputToStdoutJDK6boolruntimefalseproductIf DisplayVMOutput is true, display all VM output to stdoutshare/runtime/globals.hpp
DisplayVMOutputJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
DoCEEJDK6boolc1truedevelopDo Conditional Expression Elimination to simplify CFGshare/c1/c1_globals.hpp
DoEscapeAnalysisJDK6boolc2trueproductPerform escape analysisshare/opto/c2_globals.hpp
DoReserveCopyInSuperWordJDK9boolc2trueproductCreate reserve copy of graph in SuperWord.share/opto/c2_globals.hpp
DominatorSearchLimitJDK6intxc21000
range(0, max_jint)
productDIAGNOSTICshare/opto/c2_globals.hpp
DontCompileHugeMethodsJDK6boolruntimetrueproductDo not compile methods > HugeMethodLimitshare/runtime/globals.hpp
DontYieldALotIntervalJDK6intxruntime10developInterval between which yields will be dropped (milliseconds)share/runtime/globals.hpp
DontYieldALotJDK6boolaixppcfalsedefine_pd_globalos_cpu/aix_ppc/globals_aix_ppc.hpp
DontYieldALotJDK6boolbsdx86falsedefine_pd_globalos_cpu/bsd_x86/globals_bsd_x86.hpp
DontYieldALotJDK6boolbsdzerofalsedefine_pd_globalos_cpu/bsd_zero/globals_bsd_zero.hpp
DontYieldALotJDK6boollinuxaarch64falsedefine_pd_globalos_cpu/linux_aarch64/globals_linux_aarch64.hpp
DontYieldALotJDK6boollinuxarmfalsedefine_pd_globalos_cpu/linux_arm/globals_linux_arm.hpp
DontYieldALotJDK6boollinuxppcfalsedefine_pd_globalos_cpu/linux_ppc/globals_linux_ppc.hpp
DontYieldALotJDK6boollinuxs390falsedefine_pd_globalos_cpu/linux_s390/globals_linux_s390.hpp
DontYieldALotJDK6boollinuxx86falsedefine_pd_globalos_cpu/linux_x86/globals_linux_x86.hpp
DontYieldALotJDK6boollinuxzerofalsedefine_pd_globalos_cpu/linux_zero/globals_linux_zero.hpp
DontYieldALotJDK6boolruntimeproduct_pdThrow away obvious excess yield callsshare/runtime/globals.hpp
DontYieldALotJDK6boolwindowsaarch64falsedefine_pd_globalos_cpu/windows_aarch64/globals_windows_aarch64.hpp
DontYieldALotJDK6boolwindowsx86falsedefine_pd_globalos_cpu/windows_x86/globals_windows_x86.hpp
DumpLoadedClassListJDK8ccstrruntimeNULLproductDump the names all loaded classes, that could be stored into the CDS archive, in the specified fileshare/runtime/globals.hpp
DumpPrivateMappingsInCoreJDK11boollinuxtrueproductDIAGNOSTICos/linux/globals_linux.hpp
DumpReplayDataOnErrorJDK8boolruntimetrueproductRecord replay data for crashing compiler threadsshare/runtime/globals.hpp
DumpSharedMappingsInCoreJDK11boollinuxtrueproductDIAGNOSTICos/linux/globals_linux.hpp
DumpSharedSpacesJDK6boolruntimefalseproductSpecial 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 runsshare/runtime/globals.hpp
DynamicDumpSharedSpacesJDK13boolruntimefalseproductDynamic archiveshare/runtime/globals.hpp
DynamicallyResizeSystemDictionariesJDK10boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
EagerInitializationJDK6boolruntimefalsedevelopEagerly initialize classes if possibleshare/runtime/globals.hpp
EagerJVMCIJDK11booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
EagerXrunInitJDK6boolruntimefalseproductEagerly initialize -Xrun libraries; allows startup profiling, but not all -Xrun libraries may support the state of the VM at this timeshare/runtime/globals.hpp
EliminateAllocationArraySizeLimitJDK6intxc264
range(0, max_jint)
productArray size (number of elements) limit for scalar replacementshare/opto/c2_globals.hpp
EliminateAllocationsJDK6boolc2trueproductUse escape analysis to eliminate allocationsshare/opto/c2_globals.hpp
EliminateAutoBoxJDK6boolc2trueproductControl optimizations for autobox eliminationshare/opto/c2_globals.hpp
EliminateBlocksJDK6boolc1truedevelopEliminate unneccessary basic blocksshare/c1/c1_globals.hpp
EliminateFieldAccessJDK6boolc1truedevelopOptimize field loads and storesshare/c1/c1_globals.hpp
EliminateLocksJDK6boolc2trueproductCoarsen locks when possibleshare/opto/c2_globals.hpp
EliminateNestedLocksJDK6boolc2trueproductEliminate nested locks of the same object when possibleshare/opto/c2_globals.hpp
EliminateNullChecksJDK6boolc1truedevelopEliminate unneccessary null checksshare/c1/c1_globals.hpp
EnableContendedJDK8boolruntimetrueproductEnable @Contended annotation supportshare/runtime/globals.hpp
EnableDynamicAgentLoadingJDK9boolruntimetrueproductAllow tools to load agents with the attach mechanismshare/runtime/globals.hpp
EnableJVMCIProductJDK14booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
EnableJVMCIJDK9booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
EnableThreadSMRExtraValidityChecksJDK10boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
EnableThreadSMRStatisticsJDK10boolruntimetrueInDebugproductDIAGNOSTICshare/runtime/globals.hpp
EnableVectorAggressiveReboxingJDK16boolc2falseproductEXPERIMENTALshare/opto/c2_globals.hpp
EnableVectorReboxingJDK16boolc2falseproductEXPERIMENTALshare/opto/c2_globals.hpp
EnableVectorSupportJDK16boolc2falseproductEXPERIMENTALshare/opto/c2_globals.hpp
EpsilonElasticTLABDecayJDK11boolgctrueproductEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonElasticTLABJDK11boolgctrueproductEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonMaxTLABSizeJDK11size_tgc4 * M
range(1, max_intx)
productEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonMinHeapExpandJDK11size_tgc128 * M
range(1, max_intx)
productEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonPrintHeapStepsJDK11size_tgc20
range(0, max_intx)
productEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonTLABDecayTimeJDK11size_tgc1000
range(1, max_intx)
productEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonTLABElasticityJDK11doublegc1.1
range(1.0, DBL_MAX)
productEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
EpsilonUpdateCountersStepJDK11size_tgc1 * M
range(1, max_intx)
productEXPERIMENTALshare/gc/epsilon/epsilon_globals.hpp
ErgoHeapSizeLimitJDK6size_tgc0
range(0, max_uintx)
productMaximum ergonomically set heap size (in bytes); zero means use MaxRAM * MaxRAMPercentage / 100share/gc/shared/gc_globals.hpp
ErrorFileToStderrJDK11boolruntimefalseproductIf true, error data is printed to stderr instead of a fileshare/runtime/globals.hpp
ErrorFileToStdoutJDK11boolruntimefalseproductIf true, error data is printed to stdout instead of a fileshare/runtime/globals.hpp
ErrorFileJDK6ccstrruntimeNULLproductIf an error occurs, save the error data to this file [default: ./hs_err_pid%p.log] (%p replaced with pid)share/runtime/globals.hpp
ErrorHandlerTestJDK6uintxruntime0notproductIf > 0, provokes an error after VM initialization; the value determines which error to provoke. See test_error_handler() in vmError.cpp.share/runtime/globals.hpp
ErrorLogTimeoutJDK9uint64_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.share/runtime/globals.hpp
EscapeAnalysisTimeoutJDK7doublec220. DEBUG_ONLY(+40.)
range(0, DBL_MAX)
productAbort EA when it reaches time limit (in sec)share/opto/c2_globals.hpp
EstimateArgEscapeJDK6boolruntimetrueproductAnalyze bytecodes to estimate escape state of argumentsshare/runtime/globals.hpp
ExecutingUnitTestsJDK9boolgcfalseproductWhether the JVM is running unit tests or notshare/gc/shared/gc_globals.hpp
ExitEscapeAnalysisOnTimeoutJDK7boolc2truedevelopExit or throw assert in EA when it reaches time limitshare/opto/c2_globals.hpp
ExitOnFullCodeCacheJDK6boolruntimefalsenotproductExit the VM if we fill the code cacheshare/runtime/globals.hpp
ExitOnOutOfMemoryErrorJDK8boolruntimefalseproductJVM exits on the first occurrence of an out-of-memory errorshare/runtime/globals.hpp
ExitVMOnVerifyErrorJDK6boolruntimefalsenotproductstandard exit from VM if bytecode verify error (only in debug mode)share/runtime/globals.hpp
ExpandLoadingBaseDecode_NNJDK9bools390trueproductDIAGNOSTICcpu/s390/globals_s390.hpp
ExpandLoadingBaseDecodeJDK9bools390trueproductDIAGNOSTICcpu/s390/globals_s390.hpp
ExpandLoadingBaseEncode_NNJDK9bools390trueproductDIAGNOSTICcpu/s390/globals_s390.hpp
ExpandLoadingBaseEncodeJDK9bools390trueproductDIAGNOSTICcpu/s390/globals_s390.hpp
ExpandSubTypeCheckAtParseTimeJDK15boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
ExplicitGCInvokesConcurrentJDK6boolgcfalseproductA System.gc() request invokes a concurrent collection; (effective only when using concurrent collectors)share/gc/shared/gc_globals.hpp
ExtendedDTraceProbesJDK6boolruntimefalseproductEnable performance-impacting dtrace probesshare/runtime/globals.hpp
ExtensiveErrorReportsJDK11boolruntimePRODUCT_ONLY(false) NOT_PRODUCT(true)productError reports are more extensive.share/runtime/globals.hpp
ExtraSharedClassListFileJDK8ccstrruntimeNULLproductExtra classlist for building the CDS archive fileshare/runtime/globals.hpp
FLOATPRESSUREJDK6intxaarch6432define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
FLOATPRESSUREJDK6intxarm30define_pd_globalcpu/arm/c2_globals_arm.hpp
FLOATPRESSUREJDK6intxc2develop_pdNumber of float LRG's that constitute high register pressureshare/opto/c2_globals.hpp
FLOATPRESSUREJDK6intxppc28define_pd_globalcpu/ppc/c2_globals_ppc.hpp
FLOATPRESSUREJDK6intxs39015define_pd_globalcpu/s390/c2_globals_s390.hpp
FLOATPRESSUREJDK6intxx866define_pd_globalcpu/x86/c2_globals_x86.hpp
FLSVerifyDictionaryJDK6boolruntimefalsedevelopDo lots of (expensive) FLS dictionary verificationshare/runtime/globals.hpp
FastAllocateSizeLimitJDK6intxruntime128*Kdevelop/* Note: This value is zero mod 1<<13 for a cheap sparc set. */Inline allocations larger than this in doublewords must go slowshare/runtime/globals.hpp
FilterSpuriousWakeupsJDK6boolruntimetrueproductWhen true prevents OS-level spurious, or premature, wakeups from Object.wait (Ignored for Windows)share/runtime/globals.hpp
FlightRecorderOptionsJDK11ccstrruntimeNULLproductFlight Recorder optionsshare/runtime/globals.hpp
FlightRecorderJDK11Deprecated in JDK13boolruntimefalseproduct(Deprecated) Enable Flight Recordershare/runtime/globals.hpp
FoldStableValuesJDK8boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
ForceFloatExceptionsJDK6boolruntimetrueInDebugdevelopForce exceptions on FP stack under/overflowshare/runtime/globals.hpp
ForceTimeHighResolutionJDK6boolruntimefalseproductUsing high time resolution (for Win32 only)share/runtime/globals.hpp
ForceUnreachableJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
FreqCountInvocationsJDK6intxc21
range(1, max_intx)
developScaling factor for branch frequencies (deprecated)share/opto/c2_globals.hpp
FreqInlineSizeJDK6intxaarch64325define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
FreqInlineSizeJDK6intxarm175define_pd_globalcpu/arm/c2_globals_arm.hpp
FreqInlineSizeJDK6intxc2product_pdThe maximum bytecode size of a frequent method to be inlinedshare/opto/c2_globals.hpp
FreqInlineSizeJDK6intxppc175define_pd_globalcpu/ppc/c2_globals_ppc.hpp
FreqInlineSizeJDK6intxs390175define_pd_globalcpu/s390/c2_globals_s390.hpp
FreqInlineSizeJDK6intxx86325define_pd_globalcpu/x86/c2_globals_x86.hpp
FullGCALotDummiesJDK6intxgc32*KnotproductDummy object allocated with +FullGCALot, forcing all objects to moveshare/gc/shared/gc_globals.hpp
FullGCALotIntervalJDK6intxgc1notproductInterval between which full gc will occur with +FullGCALotshare/gc/shared/gc_globals.hpp
FullGCALotStartJDK6intxgc0notproductFor which invocation to start FullGCAlotshare/gc/shared/gc_globals.hpp
FullGCALotJDK6boolgcfalsedevelopForce full gc at every Nth exit from the runtime system (N=FullGCALotInterval)share/gc/shared/gc_globals.hpp
G1AdaptiveIHOPNumInitialSamplesJDK9size_tgc3
range(1, max_intx)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1ConcMarkStepDurationMillisJDK6doublegc10.0
range(1.0, DBL_MAX)
productTarget duration of individual concurrent marking steps in milliseconds.share/gc/g1/g1_globals.hpp
G1ConcRSHotCardLimitJDK6uintxgc4
range(0, max_jubyte)
productThe threshold that defines (>=) a hot card.share/gc/g1/g1_globals.hpp
G1ConcRSLogCacheSizeJDK6size_tgc10
range(0, 27)
productLog base 2 of the length of conc RS hot-card cache.share/gc/g1/g1_globals.hpp
G1ConcRefinementGreenZoneJDK6size_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.share/gc/g1/g1_globals.hpp
G1ConcRefinementRedZoneJDK6size_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.share/gc/g1/g1_globals.hpp
G1ConcRefinementServiceIntervalMillisJDK6uintxgc300
range(0, max_jint)
productThe G1 service thread wakes up every specified number of milliseconds to do miscellaneous work.share/gc/g1/g1_globals.hpp
G1ConcRefinementThreadsJDK6uintgc0
range(0, (max_jint-1)/wordSize)
productThe number of parallel rem set update threads. Will be set ergonomically by default.share/gc/g1/g1_globals.hpp
G1ConcRefinementThresholdStepJDK6size_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.share/gc/g1/g1_globals.hpp
G1ConcRefinementYellowZoneJDK6size_tgc0
range(0, max_intx)
productNumber of enqueued update buffers that will trigger concurrent processing. Will be selected ergonomically by default.share/gc/g1/g1_globals.hpp
G1ConfidencePercentJDK6uintxgc50
range(0, 100)
productConfidence level for MMU/pause predictionsshare/gc/g1/g1_globals.hpp
G1DummyRegionsPerGCJDK6uintxgc0developThe 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.share/gc/g1/g1_globals.hpp
G1EagerReclaimHumongousObjectsWithStaleRefsJDK8boolgctrueproductEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1EagerReclaimHumongousObjectsJDK8boolgctrueproductEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotCountJDK7uintxgc1000developNumber of successful evacuations between evacuation failures occurring at object copyingshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringConcMarkJDK7boolgctruedevelopForce use of evacuation failure handling during evacuation pauses when marking is in progressshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringConcurrentStartJDK16boolgctruedevelopForce use of evacuation failure handling during concurrent start evacuation pausesshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringMixedGCJDK7boolgctruedevelopForce use of evacuation failure handling during mixed evacuation pausesshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotDuringYoungGCJDK7boolgctruedevelopForce use of evacuation failure handling during young evacuation pausesshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotIntervalJDK7uintxgc5developTotal collections between forced triggering of evacuation failuresshare/gc/g1/g1_globals.hpp
G1EvacuationFailureALotJDK7boolgcfalsenotproductForce use of evacuation failure handling during certain evacuation pausesshare/gc/g1/g1_globals.hpp
G1ExitOnExpansionFailureJDK6boolgcfalsedevelopRaise a fatal VM exit out of memory failure in the event that heap expansion fails due to running out of swap.share/gc/g1/g1_globals.hpp
G1ExpandByPercentOfAvailableJDK6intxgc20
range(0, 100)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1HeapRegionSizeJDK6size_tgc0
range(0, 32*M)
productSize of the G1 regions.share/gc/g1/g1_globals.hpp
G1HeapWastePercentJDK7uintxgc5
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.share/gc/g1/g1_globals.hpp
G1LastPLABAverageOccupancyJDK9doublegc50.0
range(0.001, 100.0)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1MaxNewSizePercentJDK7uintxgc60
range(0, 100)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1MaxVerifyFailuresJDK6intxgc-1
range(-1, max_jint)
developThe maximum number of verification failures to print. -1 means print all.share/gc/g1/g1_globals.hpp
G1MixedGCCountTargetJDK7uintxgc8
range(0, max_uintx)
productThe target number of mixed GCs after a marking cycle.share/gc/g1/g1_globals.hpp
G1MixedGCLiveThresholdPercentJDK7uintxgc85
range(0, 100)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1NewSizePercentJDK7uintxgc5
range(0, 100)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1OldCSetRegionThresholdPercentJDK6uintxgc10
range(0, 100)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1PeriodicGCIntervalJDK12uintxgc0productMANAGEABLEshare/gc/g1/g1_globals.hpp
G1PeriodicGCInvokesConcurrentJDK12boolgctrueproductDetermines the kind of periodic GC. Set to true to have G1 perform a concurrent GC as periodic GC, otherwise use a STW Full GC.share/gc/g1/g1_globals.hpp
G1PeriodicGCSystemLoadThresholdJDK12doublegc0.0
range(0.0, (double)max_uintx)
productMANAGEABLEshare/gc/g1/g1_globals.hpp
G1RSetRegionEntriesBaseJDK6intxgc256
range(1, max_jint/wordSize)
developMax number of regions in a fine-grain table per MB.share/gc/g1/g1_globals.hpp
G1RSetRegionEntriesJDK6intxgc0
range(0, max_jint/wordSize)
productMax number of regions for which we keep bitmaps.Will be set ergonomically by defaultshare/gc/g1/g1_globals.hpp
G1RSetSparseRegionEntriesBaseJDK6intxgc4
range(1, max_jint/wordSize)
developMax number of entries per region in a sparse table per MB.share/gc/g1/g1_globals.hpp
G1RSetSparseRegionEntriesJDK6intxgc0
range(0, max_jint/wordSize)
productMax number of entries per region in a sparse table.Will be set ergonomically by default.share/gc/g1/g1_globals.hpp
G1RSetUpdatingPauseTimePercentJDK6intxgc10
range(0, 100)
productA target percentage of time that is allowed to be spend on process RS update buffers during the collection pause.share/gc/g1/g1_globals.hpp
G1RebuildRemSetChunkSizeJDK11size_tgc256 * K
range(4 * K, 32 * M)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1RefProcDrainIntervalJDK6uintgc1000
range(1, INT_MAX)
productThe number of discovered reference objects to process before draining concurrent marking work queues.share/gc/g1/g1_globals.hpp
G1ReservePercentJDK6uintxgc10
range(0, 50)
productIt determines the minimum reserve we should have in the heap to minimize the probability of promotion failure.share/gc/g1/g1_globals.hpp
G1SATBBufferEnqueueingThresholdPercentJDK6uintxgc60
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.share/gc/g1/g1_globals.hpp
G1SATBBufferSizeJDK6size_tgc1*K
range(1, max_uintx)
productNumber of entries in an SATB log buffer.share/gc/g1/g1_globals.hpp
G1SATBProcessCompletedThresholdJDK6intxgc20
range(0, max_jint)
developNumber of completed buffers that triggers log processing.share/gc/g1/g1_globals.hpp
G1SummarizeRSetStatsPeriodJDK6intxgc0
range(0, max_intx)
productDIAGNOSTICshare/gc/g1/g1_globals.hpp
G1UpdateBufferSizeJDK6size_tgc256
range(1, NOT_LP64(32*M) LP64_ONLY(1*G))
productSize of an update buffershare/gc/g1/g1_globals.hpp
G1UseAdaptiveConcRefinementJDK6boolgctrueproductSelect green, yellow and red zones adaptively to meet the the pause requirements.share/gc/g1/g1_globals.hpp
G1UseAdaptiveIHOPJDK9boolgctrueproductAdaptively adjust the initiating heap occupancy from the initial value of InitiatingHeapOccupancyPercent. The policy attempts to start marking in time based on application behavior.share/gc/g1/g1_globals.hpp
G1UseReferencePrecleaningJDK11boolgctrueproductEXPERIMENTALshare/gc/g1/g1_globals.hpp
G1VerifyBitmapsJDK8boolgcfalsedevelopVerifies the consistency of the marking bitmapsshare/gc/g1/g1_globals.hpp
G1VerifyCTCleanupJDK6boolgcfalsedevelopVerify card table cleanup.share/gc/g1/g1_globals.hpp
G1VerifyHeapRegionCodeRootsJDK7boolgcfalseproductDIAGNOSTICshare/gc/g1/g1_globals.hpp
G1VerifyRSetsDuringFullGCJDK7boolgcfalseproductDIAGNOSTICshare/gc/g1/g1_globals.hpp
G1YoungExpansionBufferPercentJDK12uintxgc10
range(0, 100)
productEXPERIMENTALshare/gc/g1/g1_globals.hpp
GCALotAtAllSafepointsJDK6boolgcfalsenotproductEnforce ScavengeALot/GCALot at all potential safepointsshare/gc/shared/gc_globals.hpp
GCDrainStackTargetSizeJDK6uintxgc64
range(0, max_juint)
productNumber of entries we will try to leave on the stack during parallel gcshare/gc/shared/gc_globals.hpp
GCExpandToAllocateDelayMillisJDK6uintxgc0developDelay between expansion and allocation (in milliseconds)share/gc/shared/gc_globals.hpp
GCHeapFreeLimitJDK6uintxgc2
range(0, 100)
productMinimum percentage of free space after a full GC before an OutOfMemoryError is thrown (used with GCTimeLimit)share/gc/shared/gc_globals.hpp
GCLockerEdenExpansionPercentJDK6uintxgc5
range(0, 100)
productHow much the GC can expand the eden by while the GC locker is active (as a percentage)share/gc/shared/gc_globals.hpp
GCLockerRetryAllocationCountJDK8uintxgc2
range(0, max_uintx)
productDIAGNOSTICshare/gc/shared/gc_globals.hpp
GCOverheadLimitThresholdJDK13uintxgc5
range(1, max_uintx)
developNumber of consecutive collections before gc time limit firesshare/gc/shared/gc_globals.hpp
GCParallelVerificationEnabledJDK6boolgctrueproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
GCPauseIntervalMillisJDK6uintxgc0productTime slice for MMU specificationshare/gc/shared/gc_globals.hpp
GCTimeLimitJDK6uintxgc98
range(0, 100)
productLimit of the proportion of time spent in GC before an OutOfMemoryError is thrown (used with GCHeapFreeLimit)share/gc/shared/gc_globals.hpp
GCTimeRatioJDK6uintxgc99
range(0, max_juint)
productAdaptive size policy application time to GC time ratioshare/gc/shared/gc_globals.hpp
GCWorkerDelayMillisJDK8uintxgc0developDelay in scheduling GC workers (in milliseconds)share/gc/parallel/parallel_globals.hpp
GenerateArrayStoreCheckJDK6boolc1truedevelopGenerates code for array store checksshare/c1/c1_globals.hpp
GenerateRangeChecksJDK6boolruntimetruedevelopGenerate range checks for array accessesshare/runtime/globals.hpp
GenerateSynchronizationCodeJDK6boolruntimetruedevelopgenerate locking/unlocking code for synchronized methods and monitorsshare/runtime/globals.hpp
GuaranteedSafepointIntervalJDK9intxruntime1000
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
HandshakeALotJDK13boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
HandshakeTimeoutJDK10uintruntime0productDIAGNOSTICshare/runtime/globals.hpp
HeapBaseMinAddressJDK6size_taixppc2*Gdefine_pd_globalos_cpu/aix_ppc/globals_aix_ppc.hpp
HeapBaseMinAddressJDK6size_tbsdx862*Gdefine_pd_globalos_cpu/bsd_x86/globals_bsd_x86.hpp
HeapBaseMinAddressJDK6size_tbsdzero2*Gdefine_pd_globalos_cpu/bsd_zero/globals_bsd_zero.hpp
HeapBaseMinAddressJDK6uintxlinuxaarch642*Gdefine_pd_globalos_cpu/linux_aarch64/globals_linux_aarch64.hpp
HeapBaseMinAddressJDK6size_tlinuxarm2*Gdefine_pd_globalos_cpu/linux_arm/globals_linux_arm.hpp
HeapBaseMinAddressJDK6size_tlinuxppc2*Gdefine_pd_globalos_cpu/linux_ppc/globals_linux_ppc.hpp
HeapBaseMinAddressJDK6size_tlinuxs3902*Gdefine_pd_globalos_cpu/linux_s390/globals_linux_s390.hpp
HeapBaseMinAddressJDK6size_tlinuxx862*Gdefine_pd_globalos_cpu/linux_x86/globals_linux_x86.hpp
HeapBaseMinAddressJDK6size_tlinuxzero2*Gdefine_pd_globalos_cpu/linux_zero/globals_linux_zero.hpp
HeapBaseMinAddressJDK6size_tgcproduct_pdOS specific low limit for heap base addressshare/gc/shared/gc_globals.hpp
HeapBaseMinAddressJDK6uintxwindowsaarch642*Gdefine_pd_globalos_cpu/windows_aarch64/globals_windows_aarch64.hpp
HeapBaseMinAddressJDK6size_twindowsx862*Gdefine_pd_globalos_cpu/windows_x86/globals_windows_x86.hpp
HeapDumpAfterFullGCJDK6boolruntimefalseproductMANAGEABLEshare/runtime/globals.hpp
HeapDumpBeforeFullGCJDK6boolruntimefalseproductMANAGEABLEshare/runtime/globals.hpp
HeapDumpOnOutOfMemoryErrorJDK6boolruntimefalseproductMANAGEABLEshare/runtime/globals.hpp
HeapDumpPathJDK6ccstrruntimeNULLproductMANAGEABLEshare/runtime/globals.hpp
HeapFirstMaximumCompactionCountJDK6uintxgc3
range(0, max_uintx)
productThe collection count for the first maximum compactionshare/gc/parallel/parallel_globals.hpp
HeapMaximumCompactionIntervalJDK6uintxgc20
range(0, max_uintx)
productHow often should we maximally compact the heap (not allowing any dead space)share/gc/parallel/parallel_globals.hpp
HeapSearchStepsJDK9uintxruntime3 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.share/runtime/globals.hpp
HeapSizePerGCThreadJDK6size_tgcScaleForWordSize(32*M)productSize of heap (bytes) per GC thread used in calculating the number of GC threadsshare/gc/shared/gc_globals.hpp
HotCallCountThresholdJDK6intxc2999999
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developlarge numbers of calls (per method invocation) force hotnessshare/opto/c2_globals.hpp
HotCallProfitThresholdJDK6intxc2999999
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
develophighly profitable inlining opportunities force hotnessshare/opto/c2_globals.hpp
HotCallTrivialSizeJDK6intxc2-1
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developtrivial methods (no larger than this) force calls to be hotshare/opto/c2_globals.hpp
HotCallTrivialWorkJDK6intxc2-1
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developtrivial execution time (no larger than this) forces hotnessshare/opto/c2_globals.hpp
HotMethodDetectionLimitJDK9intxruntime100000
range(1, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
HugeMethodLimitJDK6intxruntime8000developDon't compile methods larger than this if +DontCompileHugeMethodsshare/runtime/globals.hpp
ICMissHistogramJDK6boolruntimefalsenotproductProduce histogram of IC missesshare/runtime/globals.hpp
IEEEPrecisionJDK6boolx86truedevelopEnables IEEE precision (for INTEL only)cpu/x86/globals_x86.hpp
INTPRESSUREJDK6intxaarch6424define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
INTPRESSUREJDK6intxarm12define_pd_globalcpu/arm/c2_globals_arm.hpp
INTPRESSUREJDK6intxc2develop_pdNumber of integer LRG's that constitute high register pressureshare/opto/c2_globals.hpp
INTPRESSUREJDK6intxppc26define_pd_globalcpu/ppc/c2_globals_ppc.hpp
INTPRESSUREJDK6intxs39010define_pd_global// Medium size register set, 6 special purpose regs, 3 SOE regs.cpu/s390/c2_globals_s390.hpp
INTPRESSUREJDK6intxx866define_pd_globalcpu/x86/c2_globals_x86.hpp
IdealizeClearArrayNodeJDK9boolaarch64truedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
IdealizeClearArrayNodeJDK9boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
IdealizeClearArrayNodeJDK9boolc2product_pdDIAGNOSTICshare/opto/c2_globals.hpp
IdealizeClearArrayNodeJDK9boolppctruedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
IdealizeClearArrayNodeJDK9bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
IdealizeClearArrayNodeJDK9boolx86truedefine_pd_globalcpu/x86/c2_globals_x86.hpp
IdealizedNumericsJDK6boolc2falsedevelopCheck performance difference allowing FP associativity and commutativity...share/opto/c2_globals.hpp
IgnoreEmptyClassPathsJDK8boolruntimefalseproductIgnore empty path elements in -classpathshare/runtime/globals.hpp
IgnoreRewritesJDK6boolruntimefalsedevelopSuppress rewrites of bytecodes in the oopmap generator. This is unsafe!share/runtime/globals.hpp
IgnoreUnrecognizedVMOptionsJDK6boolruntimefalseproductIgnore unrecognized VM optionsshare/runtime/globals.hpp
ImplicitDiv0ChecksJDK6boolc1truedevelopUse implicit division by zero checksshare/c1/c1_globals.hpp
ImplicitNullCheckThresholdJDK6intxc23
range(0, max_jint)
developDon't do implicit null checks if NPE's in a method exceeds limitshare/opto/c2_globals.hpp
ImplicitNullChecksJDK6boolaarch64truedefine_pd_global// Generate code for implicit null checkscpu/aarch64/globals_aarch64.hpp
ImplicitNullChecksJDK6boolarmtruedefine_pd_global// Generate code for implicit null checkscpu/arm/globals_arm.hpp
ImplicitNullChecksJDK6boolruntimeproduct_pdDIAGNOSTICshare/runtime/globals.hpp
ImplicitNullChecksJDK6boolppctruedefine_pd_global// Generate code for implicit null checks.cpu/ppc/globals_ppc.hpp
ImplicitNullChecksJDK6bools390truedefine_pd_global// Generate code for implicit null checks.cpu/s390/globals_s390.hpp
ImplicitNullChecksJDK6boolx86truedefine_pd_global// Generate code for implicit null checkscpu/x86/globals_x86.hpp
ImplicitNullChecksJDK6boolzerotruedefine_pd_globalcpu/zero/globals_zero.hpp
IncreaseFirstTierCompileThresholdAtJDK8uintxruntime50
range(0, 99)
productIncrease the compile threshold for C1 compilation if the code cache is filled by the specified percentageshare/runtime/globals.hpp
IncrementalInlineJDK7boolc2trueproductdo post parse inliningshare/opto/c2_globals.hpp
IndexSetWatchJDK6intxc20
range(-1, 0)
notproductTrace all operations on this IndexSet (-1 means all, 0 none)share/opto/c2_globals.hpp
InitArrayShortSizeJDK9intxaarch64BytesPerLongdefine_pd_globalcpu/aarch64/globals_aarch64.hpp
InitArrayShortSizeJDK9intxarm8*BytesPerLongdefine_pd_globalcpu/arm/globals_arm.hpp
InitArrayShortSizeJDK9intxruntimeproduct_pdDIAGNOSTICshare/runtime/globals.hpp
InitArrayShortSizeJDK9intxppc9*BytesPerLongdefine_pd_globalcpu/ppc/globals_ppc.hpp
InitArrayShortSizeJDK9intxs3901*BytesPerLongdefine_pd_globalcpu/s390/globals_s390.hpp
InitArrayShortSizeJDK9intxx868*BytesPerLongdefine_pd_globalcpu/x86/globals_x86.hpp
InitArrayShortSizeJDK9intxzero0define_pd_globalcpu/zero/globals_zero.hpp
InitialBootClassLoaderMetaspaceSizeJDK8Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
size_truntimeNOT_LP64(2200*K) LP64_ONLY(4*M)
range(30*K, max_uintx/BytesPerWord)
product(Deprecated) Initial size of the boot class loader data metaspaceshare/runtime/globals.hpp
InitialCodeCacheSizeJDK6intxaarch64160*Kdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
InitialCodeCacheSizeJDK6size_tarm1536*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizecpu/arm/c2_globals_arm.hpp
InitialCodeCacheSizeJDK6uintxcompiler160*Kdefine_pd_globalshare/compiler/compiler_globals.hpp
InitialCodeCacheSizeJDK6uintxruntimeproduct_pdInitial code cache size (in bytes)share/runtime/globals.hpp
InitialCodeCacheSizeJDK6uintxppc160*Kdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
InitialCodeCacheSizeJDK6uintxs3902048*Kdefine_pd_global// Integral multiple of CodeCacheExpansionSizecpu/s390/c2_globals_s390.hpp
InitialCodeCacheSizeJDK6uintxx86160*Kdefine_pd_globalcpu/x86/c1_globals_x86.hpp
InitialHeapSizeJDK6size_tgc0productInitial heap size (in bytes); zero means use ergonomicsshare/gc/shared/gc_globals.hpp
InitialRAMFractionJDK6Deprecated in JDK10uintxgc64
range(1, max_uintx)
productFraction (1/n) of real memory used for initial heap size. Deprecated, use InitialRAMPercentage insteadshare/gc/shared/gc_globals.hpp
InitialRAMPercentageJDK10doublegc1.5625
range(0.0, 100.0)
productPercentage of real memory used for initial heap sizeshare/gc/shared/gc_globals.hpp
InitialSurvivorRatioJDK6uintxgc8
range(0, max_uintx)
productInitial ratio of young generation/survivor space sizeshare/gc/shared/gc_globals.hpp
InitialTenuringThresholdJDK6uintxgc7
range(0, markWord::max_age + 1)
productInitial value for tenuring thresholdshare/gc/shared/gc_globals.hpp
InitiatingHeapOccupancyPercentJDK6uintxgc45
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)share/gc/shared/gc_globals.hpp
InjectCompilerCreationFailureJDK11boolruntimefalsedevelopInject thread creation failures for UseDynamicNumberOfCompilerThreadsshare/runtime/globals.hpp
InjectGCWorkerCreationFailureJDK9boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
InlineAccessorsJDK6boolc2truedevelopinline accessor methods (get/set)share/opto/c2_globals.hpp
InlineArrayCopyJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineClassNativesJDK6boolcompilertruedefine_pd_globalshare/compiler/compiler_globals.hpp
InlineClassNativesJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineDataFileJDK8ccstrruntimeNULLproductFile containing inlining replay information[default: ./inline_pid%p.log] (%p replaced with pid)share/runtime/globals.hpp
InlineFrequencyCountJDK6intxaarch64100define_pd_globalcpu/aarch64/globals_aarch64.hpp
InlineFrequencyCountJDK6intxarm50define_pd_globalcpu/arm/globals_arm.hpp
InlineFrequencyCountJDK6intxruntimeproduct_pdDIAGNOSTICshare/runtime/globals.hpp
InlineFrequencyCountJDK6intxppc100define_pd_globalcpu/ppc/globals_ppc.hpp
InlineFrequencyCountJDK6intxs390100define_pd_globalcpu/s390/globals_s390.hpp
InlineFrequencyCountJDK6intxx86100define_pd_globalcpu/x86/globals_x86.hpp
InlineFrequencyCountJDK6intxzero100define_pd_globalcpu/zero/globals_zero.hpp
InlineFrequencyRatioJDK6intxruntime20
range(0, max_jint)
developRatio of call site execution to caller method invocationshare/runtime/globals.hpp
InlineIntrinsicsJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
InlineIntrinsicsJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
InlineIntrinsicsJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
InlineIntrinsicsJDK6boolruntimedevelop_pdInline intrinsics that can be statically resolvedshare/runtime/globals.hpp
InlineIntrinsicsJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
InlineIntrinsicsJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
InlineIntrinsicsJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
InlineMathNativesJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineMethodsWithExceptionHandlersJDK6boolc1truedevelopInline methods containing exception handlers (NOTE: does not work with current backend)share/c1/c1_globals.hpp
InlineNIOCheckIndexJDK6boolc1trueproductDIAGNOSTICshare/c1/c1_globals.hpp
InlineNativesJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineObjectCopyJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
InlineObjectHashJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineReflectionGetCallerClassJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
InlineSmallCodeJDK6intxaarch641000define_pd_globalcpu/aarch64/globals_aarch64.hpp
InlineSmallCodeJDK6intxarm1500define_pd_globalcpu/arm/globals_arm.hpp
InlineSmallCodeJDK6intxc2product_pdOnly inline already compiled methods if their code size is less than thisshare/opto/c2_globals.hpp
InlineSmallCodeJDK6intxppc1500define_pd_globalcpu/ppc/globals_ppc.hpp
InlineSmallCodeJDK6intxs3902000define_pd_globalcpu/s390/globals_s390.hpp
InlineSmallCodeJDK6intxx861000define_pd_globalcpu/x86/globals_x86.hpp
InlineSmallCodeJDK6intxzero1000define_pd_globalcpu/zero/globals_zero.hpp
InlineSynchronizedMethodsJDK6boolc1trueproductInline synchronized methodsshare/c1/c1_globals.hpp
InlineThreadNativesJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineThrowCountJDK6intxruntime50
range(0, max_jint)
developForce inlining of interpreted methods that throw this oftenshare/runtime/globals.hpp
InlineThrowMaxSizeJDK6intxruntime200
range(0, max_jint)
developForce inlining of throwing methods smaller than thisshare/runtime/globals.hpp
InlineUnsafeOpsJDK6boolcompilertruedefine_pd_globalshare/compiler/compiler_globals.hpp
InlineUnsafeOpsJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
InlineWarmCallsJDK6boolc2falsedevelopUse a heat-based priority queue to govern inliningshare/opto/c2_globals.hpp
InlineJDK6boolruntimetrueproductEnable inliningshare/runtime/globals.hpp
InstallMethodsJDK6boolc1truedevelopInstall methods at the end of successful compilationsshare/c1/c1_globals.hpp
InstructionCountCutoffJDK6intxc137000
range(0, max_jint)
developIf GraphBuilder adds this many instructions, bails outshare/c1/c1_globals.hpp
IntelJccErratumMitigationJDK15boolx86trueproductDIAGNOSTICcpu/x86/globals_x86.hpp
InterceptOSExceptionJDK6boolruntimefalsedevelopStart debugger when an implicit OS (e.g. NULL) exception happensshare/runtime/globals.hpp
InteriorEntryAlignmentJDK6intxaarch6416define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
InteriorEntryAlignmentJDK6intxarm16define_pd_global// = CodeEntryAlignmentcpu/arm/c2_globals_arm.hpp
InteriorEntryAlignmentJDK6intxc2product_pdCode alignment for interior entry points in generated code (in bytes)share/opto/c2_globals.hpp
InteriorEntryAlignmentJDK6intxppc16define_pd_globalcpu/ppc/c2_globals_ppc.hpp
InteriorEntryAlignmentJDK6intxs3902define_pd_globalcpu/s390/c2_globals_s390.hpp
InteriorEntryAlignmentJDK6intxx864define_pd_globalcpu/x86/c2_globals_x86.hpp
InterpreterProfilePercentageJDK6intxruntime33
range(0, 100)
productNON_TIERED number of method invocations/branches (expressed as % of CompileThreshold) before profiling in the interpretershare/runtime/globals.hpp
JVMCICounterSizeJDK9intxjvmci0
range(0, 1000000)
productEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCICountersExcludeCompilerJDK9booljvmcitrueproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCIEventLogLevelJDK16intxjvmci1
range(0, 4)
productEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCIHostThreadsJDK9intxjvmci1
range(0, max_jint))
productEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCILibDumpJNIConfigJDK13ccstrjvmciNULLproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCILibPathJDK13ccstrjvmciNULLproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCINMethodSizeLimitJDK9intxjvmci(80*K)*wordSize
range(0, max_jint)
productEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCIPrintPropertiesJDK9booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCIThreadsJDK9intxjvmci1
range(1, max_jint)
productEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCITraceLevelJDK9intxjvmci0
range(0, 4)
productEXPERIMENTALshare/jvmci/jvmci_globals.hpp
JVMCIUseFastLockingJDK9booljvmcitruedevelopUse fast inlined locking codeshare/jvmci/jvmci_globals.hpp
JVMInvokeMethodSlackJDK6size_taixppc8192define_pd_globalos_cpu/aix_ppc/globals_aix_ppc.hpp
JVMInvokeMethodSlackJDK6size_tbsdx868192define_pd_globalos_cpu/bsd_x86/globals_bsd_x86.hpp
JVMInvokeMethodSlackJDK6size_tbsdzero8192define_pd_globalos_cpu/bsd_zero/globals_bsd_zero.hpp
JVMInvokeMethodSlackJDK6uintxlinuxaarch648192define_pd_globalos_cpu/linux_aarch64/globals_linux_aarch64.hpp
JVMInvokeMethodSlackJDK6size_tlinuxarm8192define_pd_globalos_cpu/linux_arm/globals_linux_arm.hpp
JVMInvokeMethodSlackJDK6size_tlinuxppc8192define_pd_globalos_cpu/linux_ppc/globals_linux_ppc.hpp
JVMInvokeMethodSlackJDK6size_tlinuxs3908192define_pd_globalos_cpu/linux_s390/globals_linux_s390.hpp
JVMInvokeMethodSlackJDK6size_tlinuxx868192define_pd_globalos_cpu/linux_x86/globals_linux_x86.hpp
JVMInvokeMethodSlackJDK6size_tlinuxzero8192define_pd_globalos_cpu/linux_zero/globals_linux_zero.hpp
JVMInvokeMethodSlackJDK6size_truntimedevelop_pdStack space (bytes) required for JVM_InvokeMethod to completeshare/runtime/globals.hpp
JVMInvokeMethodSlackJDK6uintxwindowsaarch648192define_pd_globalos_cpu/windows_aarch64/globals_windows_aarch64.hpp
JVMInvokeMethodSlackJDK6size_twindowsx868192define_pd_globalos_cpu/windows_x86/globals_windows_x86.hpp
JavaMonitorsInStackTraceJDK6boolruntimetrueproductPrint information about Java monitor locks when the stacks are dumpedshare/runtime/globals.hpp
JavaPriority10_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority1_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority2_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority3_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority4_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority5_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority6_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority7_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority8_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
JavaPriority9_To_OSPriorityJDK6intxruntime-1
range(-1, 127)
productMap Java priorities to OS prioritiesshare/runtime/globals.hpp
LIRTraceExecutionJDK6boolc1falsedevelopadd LIR code which logs the execution of blocksshare/c1/c1_globals.hpp
LIRTracePeepholeJDK6boolc1falsedevelopTrace peephole optimizershare/c1/c1_globals.hpp
LargePageHeapSizeThresholdJDK6size_truntime128*M
range(0, max_uintx)
productUse large pages if maximum heap is at least this bigshare/runtime/globals.hpp
LargePageSizeInBytesJDK6size_truntime0
range(0, max_uintx)
productLarge page size (0 to let VM choose the page size)share/runtime/globals.hpp
LargePagesIndividualAllocationInjectErrorJDK6boolruntimefalsedevelopFail large pages individual allocationshare/runtime/globals.hpp
LiveNodeCountInliningCutoffJDK7intxc240000
range(0, max_juint / 8)
productmax number of live nodes in a methodshare/opto/c2_globals.hpp
LoadExecStackDllInVMThreadJDK7boollinuxtrueproductLoad DLLs with executable-stack attribute in the VM Threados/linux/globals_linux.hpp
LoadLineNumberTablesJDK6boolruntimetruedevelopTell whether the class file parser loads line number tablesshare/runtime/globals.hpp
LoadLocalVariableTablesJDK6boolruntimetruedevelopTell whether the class file parser loads local variable tablesshare/runtime/globals.hpp
LoadLocalVariableTypeTablesJDK6boolruntimetruedevelopTell whether the class file parser loads local variable typetablesshare/runtime/globals.hpp
LogCompilationJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
LogEventsBufferEntriesJDK6uintxruntime20
range(1, NOT_LP64(1*K) LP64_ONLY(1*M))
productDIAGNOSTICshare/runtime/globals.hpp
LogEventsJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
LogFileJDK6ccstrruntimeNULLproductDIAGNOSTICshare/runtime/globals.hpp
LogSweeperJDK6boolruntimefalsenotproductKeep a ring buffer of sweeper activityshare/runtime/globals.hpp
LogTouchedMethodsJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
LogVMOutputJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
LoopMaxUnrollJDK7intxc216
range(0, max_jint)
productMaximum number of unrolls for main loopshare/opto/c2_globals.hpp
LoopOptsCountJDK6intxc243
range(5, 43)
productSet level of loop optimization for tier 1 compilesshare/opto/c2_globals.hpp
LoopPercentProfileLimitJDK9intxaarch6410define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
LoopPercentProfileLimitJDK9intxarm10define_pd_globalcpu/arm/c2_globals_arm.hpp
LoopPercentProfileLimitJDK9intxc2product_pdUnroll loop bodies with % node count of profile limitshare/opto/c2_globals.hpp
LoopPercentProfileLimitJDK9intxppc10define_pd_globalcpu/ppc/c2_globals_ppc.hpp
LoopPercentProfileLimitJDK9intxs39010define_pd_globalcpu/s390/c2_globals_s390.hpp
LoopPercentProfileLimitJDK9intxx8630define_pd_globalcpu/x86/c2_globals_x86.hpp
LoopStripMiningIterShortLoopJDK10uintxc20
range(0, max_juint)
productLoop with fewer iterations are not strip minedshare/opto/c2_globals.hpp
LoopStripMiningIterJDK10uintxc20
range(0, max_juint)
productNumber of iterations in strip mined loopshare/opto/c2_globals.hpp
LoopUnrollLimitJDK6intxaarch6460define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
LoopUnrollLimitJDK6intxarm60define_pd_global// Design center runs on 1.3.1cpu/arm/c2_globals_arm.hpp
LoopUnrollLimitJDK6intxc2product_pdUnroll loop bodies with node count less than thisshare/opto/c2_globals.hpp
LoopUnrollLimitJDK6intxppc60define_pd_globalcpu/ppc/c2_globals_ppc.hpp
LoopUnrollLimitJDK6intxs39060define_pd_globalcpu/s390/c2_globals_s390.hpp
LoopUnrollLimitJDK6intxx8650define_pd_global// Design center runs on 1.3.1cpu/x86/c2_globals_x86.hpp
LoopUnrollMinJDK6intxc24
range(0, max_jint)
productMinimum number of unroll loop bodies before checking progressof rounds of unroll,optimize,..share/opto/c2_globals.hpp
LoopUnswitchingJDK6boolc2trueproductEnable loop unswitching (a form of invariant test hoisting)share/opto/c2_globals.hpp
MVCLEThresholdJDK9size_ts390+2*(4*K)productDIAGNOSTICcpu/s390/globals_s390.hpp
MallocCatchPtrJDK6intxruntime-1developHit breakpoint when mallocing/freeing this pointershare/runtime/globals.hpp
MallocMaxTestWordsJDK8uintxruntime0
range(0, max_uintx)
productDIAGNOSTICshare/runtime/globals.hpp
ManagementServerJDK6boolruntimefalseproductCreate JMX Management Servershare/runtime/globals.hpp
MarkStackSizeMaxJDK6size_tgcNOT_LP64(4*M) LP64_ONLY(512*M)
range(1, (max_jint - 1))
productMaximum size of marking stackshare/gc/shared/gc_globals.hpp
MarkStackSizeJDK6size_tgcNOT_LP64(32*K) LP64_ONLY(4*M)
range(1, (max_jint - 1))
productSize of marking stackshare/gc/shared/gc_globals.hpp
MarkSweepAlwaysCompactCountJDK6uintgc4
range(1, max_juint)
productHow often should we fully compact the heap (ignoring the dead space parameters)share/gc/shared/gc_globals.hpp
MarkSweepDeadRatioJDK6uintxgc5
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. 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.share/gc/shared/gc_globals.hpp
MaxBCEAEstimateLevelJDK6intxruntime5
range(0, max_jint)
productMaximum number of nested calls that are analyzed by BC EAshare/runtime/globals.hpp
MaxBCEAEstimateSizeJDK6intxruntime150
range(0, max_jint)
productMaximum bytecode size of a method to be analyzed by BC EAshare/runtime/globals.hpp
MaxDirectMemorySizeJDK6uint64_truntime0
range(0, max_jlong)
productMaximum total size of NIO direct-buffer allocationsshare/runtime/globals.hpp
MaxElementPrintSizeJDK6intxruntime256notproductmaximum number of elements to printshare/runtime/globals.hpp
MaxExpectedDataSegmentSizeJDK9uintxaix8*GproductMaximum expected Data Segment Size.os/aix/globals_aix.hpp
MaxFDLimitJDK6boolruntimetrueproductBump the number of file descriptors to maximum (Unix only)share/runtime/globals.hpp
MaxForceInlineLevelJDK7intxruntime100
range(0, max_jint)
developmaximum number of nested calls that are forced for inlining (using CompileCommand or marked w/ @ForceInline)share/runtime/globals.hpp
MaxGCMinorPauseMillisJDK6Deprecated in JDK8uintxgcmax_uintx
range(0, max_uintx)
productAdaptive size policy maximum GC minor pause time goal in millisecondshare/gc/shared/gc_globals.hpp
MaxGCPauseMillisJDK6uintxgcmax_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 sliceshare/gc/shared/gc_globals.hpp
MaxHeapFreeRatioJDK6uintxruntime70
range(0, 100)
productMANAGEABLEshare/runtime/globals.hpp
MaxHeapSizeJDK6size_tgcScaleForWordSize(96*M)productMaximum heap size (in bytes)share/gc/shared/gc_globals.hpp
MaxInlineLevelJDK6intxc215
range(0, max_jint)
productmaximum number of nested calls that are inlined by high tier compilershare/opto/c2_globals.hpp
MaxInlineSizeJDK6intxc235
range(0, max_jint)
productThe maximum bytecode size of a method to be inlined by high tier compilershare/opto/c2_globals.hpp
MaxJNILocalCapacityJDK8intxruntime65536
range(min_intx, max_intx)
productMaximum allowable local JNI handle capacity to EnsureLocalCapacity() and PushLocalFrame(), where <= 0 is unlimited, default: 65536share/runtime/globals.hpp
MaxJavaStackTraceDepthJDK6intxruntime1024
range(0, max_jint/2)
productThe maximum number of lines in the stack trace for Java exceptions (0 means all)share/runtime/globals.hpp
MaxJumpTableSizeJDK6intxc265000
range(0, max_intx)
productMaximum number of targets in a generated jump tableshare/opto/c2_globals.hpp
MaxJumpTableSparsenessJDK6intxc25
range(0, max_intx / 4)
productMaximum sparseness for jumptablesshare/opto/c2_globals.hpp
MaxLabelRootDepthJDK6intxc21100
range(100, max_jint)
productMaximum times call Label_Root to prevent stack overflowshare/opto/c2_globals.hpp
MaxLoopPadJDK6intxc2(OptoLoopAlignment-1)
range(0, max_jint)
productAlign a loop if padding size in bytes is less or equal to this valueshare/opto/c2_globals.hpp
MaxMetaspaceExpansionJDK8size_truntimeScaleForWordSize(4*M)
range(0, max_uintx)
productThe maximum expansion of Metaspace without full GC (in bytes)share/runtime/globals.hpp
MaxMetaspaceFreeRatioJDK8uintxruntime70
range(0, 100)
productThe maximum percentage of Metaspace free after GC to avoid shrinkingshare/runtime/globals.hpp
MaxMetaspaceSizeJDK8size_truntimemax_uintxproductMaximum size of Metaspaces (in bytes)share/runtime/globals.hpp
MaxNewSizeJDK6size_tgcmax_uintx
range(0, max_uintx)
productMaximum new generation size (in bytes), max_uintx means set ergonomicallyshare/gc/shared/gc_globals.hpp
MaxNodeLimitJDK6intxc280000
range(1000, max_jint / 3)
productMaximum number of nodesshare/opto/c2_globals.hpp
MaxRAMFractionJDK6Deprecated in JDK10uintxgc4
range(1, max_uintx)
productMaximum fraction (1/n) of real memory used for maximum heap size. Deprecated, use MaxRAMPercentage insteadshare/gc/shared/gc_globals.hpp
MaxRAMPercentageJDK10doublegc25.0
range(0.0, 100.0)
productMaximum percentage of real memory used for maximum heap sizeshare/gc/shared/gc_globals.hpp
MaxRAMJDK6uint64_taarch641ULL*Gdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
MaxRAMJDK6uint64_tarm4ULL*Gdefine_pd_globalcpu/arm/c2_globals_arm.hpp
MaxRAMJDK6uint64_tcompiler1ULL*Gdefine_pd_globalshare/compiler/compiler_globals.hpp
MaxRAMJDK6uint64_tgcproduct_pdReal memory size (in bytes) used to set maximum heap sizeshare/gc/shared/gc_globals.hpp
MaxRAMJDK6uint64_tppc1ULL*Gdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
MaxRAMJDK6uint64_ts390128ULL*Gdefine_pd_globalcpu/s390/c2_globals_s390.hpp
MaxRAMJDK6uint64_tx861ULL*Gdefine_pd_globalcpu/x86/c1_globals_x86.hpp
MaxRecursiveInlineLevelJDK6intxc21
range(0, max_jint)
productmaximum number of nested recursive calls that are inlined by high tier compilershare/opto/c2_globals.hpp
MaxSubklassPrintSizeJDK6intxruntime4notproductmaximum number of subklasses to print when printing klassshare/runtime/globals.hpp
MaxTenuringThresholdJDK6uintxgc15
range(0, markWord::max_age + 1)
productMaximum value for tenuring thresholdshare/gc/shared/gc_globals.hpp
MaxTrivialSizeJDK6intxc26
range(0, max_jint)
productThe maximum bytecode size of a trivial method to be inlined by high tier compilershare/opto/c2_globals.hpp
MaxVectorSizeJDK7intxc264
range(0, max_jint)
productMax vector size in bytes, actual size could be less depending on elements typeshare/opto/c2_globals.hpp
MaxVirtMemFractionJDK7uintxgc2developMaximum fraction (1/n) of virtual memory used for ergonomically determining maximum heap sizeshare/gc/shared/gc_globals.hpp
MemProfilingIntervalJDK6intxruntime500notproductTime between each invocation of the MemProfilershare/runtime/globals.hpp
MemProfilingJDK6boolruntimefalsedevelopWrite memory usage profiling to log fileshare/runtime/globals.hpp
MetadataAllocationFailALotIntervalJDK8uintxgc1000developMetadata allocation failure a lot intervalshare/gc/shared/gc_globals.hpp
MetadataAllocationFailALotJDK8boolgcfalsedevelopFail metadata allocations at intervals controlled by MetadataAllocationFailALotIntervalshare/gc/shared/gc_globals.hpp
MetaspaceSizeJDK8uintxaarch6412*Mdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
MetaspaceSizeJDK8size_tarmScaleForWordSize(16*M)define_pd_globalcpu/arm/c2_globals_arm.hpp
MetaspaceSizeJDK8size_tcompilerScaleForWordSize(4*M)define_pd_globalshare/compiler/compiler_globals.hpp
MetaspaceSizeJDK8size_truntimeproduct_pdInitial threshold (in bytes) at which a garbage collection is done to reduce Metaspace usageshare/runtime/globals.hpp
MetaspaceSizeJDK8size_tppc12*Mdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
MetaspaceSizeJDK8size_ts390ScaleForWordSize(16*M)define_pd_globalcpu/s390/c2_globals_s390.hpp
MetaspaceSizeJDK8size_tx8612*Mdefine_pd_globalcpu/x86/c1_globals_x86.hpp
MethodFlushingJDK6boolruntimetrueproductReclamation of zombie and not-entrant methodsshare/runtime/globals.hpp
MethodHistogramCutoffJDK6intxruntime100developThe cutoff value for method invocation histogram (+CountCalls)share/runtime/globals.hpp
MinHeapDeltaBytesJDK6size_truntimeScaleForWordSize(128*K)
range(0, max_uintx)
productThe minimum change in heap space due to GC (in bytes)share/runtime/globals.hpp
MinHeapFreeRatioJDK6uintxruntime40
range(0, 100)
productMANAGEABLEshare/runtime/globals.hpp
MinHeapSizeJDK13size_tgc0productMinimum heap size (in bytes); zero means use ergonomicsshare/gc/shared/gc_globals.hpp
MinInliningThresholdJDK6intxruntime250
range(0, max_jint)
productThe minimum invocation count a method needs to have to be inlinedshare/runtime/globals.hpp
MinJumpTableSizeJDK6intxaarch6410define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
MinJumpTableSizeJDK6intxarm16define_pd_globalcpu/arm/c2_globals_arm.hpp
MinJumpTableSizeJDK6intxc2product_pdMinimum number of targets in a generated jump tableshare/opto/c2_globals.hpp
MinJumpTableSizeJDK6intxppc10define_pd_globalcpu/ppc/c2_globals_ppc.hpp
MinJumpTableSizeJDK6intxs39018define_pd_globalcpu/s390/c2_globals_s390.hpp
MinJumpTableSizeJDK6intxx8610define_pd_globalcpu/x86/c2_globals_x86.hpp
MinMetaspaceExpansionJDK8size_truntimeScaleForWordSize(256*K)
range(0, max_uintx)
productThe minimum expansion of Metaspace (in bytes)share/runtime/globals.hpp
MinMetaspaceFreeRatioJDK8uintxruntime40
range(0, 99)
productThe minimum percentage of Metaspace free after GC to avoid expansionshare/runtime/globals.hpp
MinOopMapAllocationJDK6intxruntime8developMinimum number of OopMap entries in an OopMapSetshare/runtime/globals.hpp
MinPassesBeforeFlushJDK9intxruntime10
range(0, max_intx)
productDIAGNOSTICshare/runtime/globals.hpp
MinRAMFractionJDK6Deprecated in JDK10uintxgc2
range(1, max_uintx)
productMinimum fraction (1/n) of real memory used for maximum heap size on systems with small physical memory size. Deprecated, use MinRAMPercentage insteadshare/gc/shared/gc_globals.hpp
MinRAMPercentageJDK10doublegc50.0
range(0.0, 100.0)
productMinimum percentage of real memory used for maximum heapsize on systems with small physical memory sizeshare/gc/shared/gc_globals.hpp
MinSurvivorRatioJDK6uintxgc3
range(3, max_uintx)
productMinimum ratio of young generation/survivor space sizeshare/gc/shared/gc_globals.hpp
MinTLABSizeJDK6size_tgc2*K
range(1, max_uintx/2)
productMinimum allowed TLAB size (in bytes)share/gc/shared/gc_globals.hpp
MonitorUsedDeflationThresholdJDK10intxruntime90
range(0, 100)
productEXPERIMENTALshare/runtime/globals.hpp
MonomorphicArrayCheckJDK6boolc2truedevelopUncommon-trap array store checks that require full type checkshare/opto/c2_globals.hpp
MultiArrayExpandLimitJDK6intxc26
range(0, max_jint)
productMaximum number of individual allocations in an inline-expanded multianewarray instructionshare/opto/c2_globals.hpp
NMethodSizeLimitJDK6intxc1(64*K)*wordSize
range(0, max_jint)
developMaximum size of a compiled method.share/c1/c1_globals.hpp
NUMAChunkResizeWeightJDK6uintxruntime20
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying average for AdaptiveNUMAChunkSizingshare/runtime/globals.hpp
NUMAInterleaveGranularityJDK6size_truntime2*MproductGranularity to use for NUMA interleaving on Windows OSshare/runtime/globals.hpp
NUMAPageScanRateJDK6uintxruntime256
range(0, max_uintx)
productMaximum number of pages to include in the page scan procedureshare/runtime/globals.hpp
NUMASpaceResizeRateJDK6size_truntime1*G
range(0, max_uintx)
productDo not reallocate more than this amount per collectionshare/runtime/globals.hpp
NUMAStatsJDK6boolruntimefalseproductPrint NUMA stats in detailed heap informationshare/runtime/globals.hpp
NativeMemoryTrackingJDK7ccstrruntimeoffproductNative memory tracking optionsshare/runtime/globals.hpp
NearCpoolJDK9boolaarch64trueproductconstant pool is close to instructionscpu/aarch64/globals_aarch64.hpp
NestedInliningSizeRatioJDK6intxc190
range(0, 100)
developPercentage of prev. allowed inline size in recursive inliningshare/c1/c1_globals.hpp
NeverActAsServerClassMachineJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
NeverActAsServerClassMachineJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
NeverActAsServerClassMachineJDK6boolcompilertruedefine_pd_globalshare/compiler/compiler_globals.hpp
NeverActAsServerClassMachineJDK6boolgcproduct_pdNever act like a server-class machineshare/gc/shared/gc_globals.hpp
NeverActAsServerClassMachineJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
NeverActAsServerClassMachineJDK6bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
NeverActAsServerClassMachineJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
NeverTenureJDK6boolgcfalseproductNever tenure objects in eden, may tenure on overflow (ParallelGC only)share/gc/shared/gc_globals.hpp
NewCodeParameterJDK6intxruntime0developTesting Only: Create a dedicated integer parameter before putbackshare/runtime/globals.hpp
NewRatioJDK6uintxgc2
range(0, max_uintx-1)
productRatio of old/new generation sizesshare/gc/shared/gc_globals.hpp
NewSizeThreadIncreaseJDK6intxaarch644*Kdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
NewSizeThreadIncreaseJDK6size_tarmScaleForWordSize(4*K)define_pd_globalcpu/arm/c2_globals_arm.hpp
NewSizeThreadIncreaseJDK6size_tcompiler4*Kdefine_pd_globalshare/compiler/compiler_globals.hpp
NewSizeThreadIncreaseJDK6size_tgcproduct_pdAdditional size added to desired new generation size per non-daemon thread (in bytes)share/gc/shared/gc_globals.hpp
NewSizeThreadIncreaseJDK6size_tppc16*Kdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
NewSizeThreadIncreaseJDK6size_ts390ScaleForWordSize(4*K)define_pd_globalcpu/s390/c2_globals_s390.hpp
NewSizeThreadIncreaseJDK6size_tx864*Kdefine_pd_globalcpu/x86/c1_globals_x86.hpp
NewSizeJDK6size_tgcScaleForWordSize(1*M)productInitial new generation size (in bytes)share/gc/shared/gc_globals.hpp
NmethodSweepActivityJDK8intxruntime10
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productRemoves cold nmethods from code cache if > 0. Higher values result in more aggressive sweepingshare/runtime/globals.hpp
NodeCountInliningCutoffJDK6intxc218000
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developIf parser node generation exceeds limit stop inliningshare/opto/c2_globals.hpp
NodeCountInliningStepJDK6intxc21000
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developTarget size of warm calls inlined between optimization passesshare/opto/c2_globals.hpp
NodeLimitFudgeFactorJDK6intxc22000productFudge Factor for certain optimizationsshare/opto/c2_globals.hpp
NonNMethodCodeHeapSizeJDK9intxaarch645*Mdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
NonNMethodCodeHeapSizeJDK9size_tarm5*Mdefine_pd_globalcpu/arm/c2_globals_arm.hpp
NonNMethodCodeHeapSizeJDK9uintxcompiler32*Mdefine_pd_globalshare/compiler/compiler_globals.hpp
NonNMethodCodeHeapSizeJDK9uintxruntimeproduct_pdSize of code heap with non-nmethods (in bytes)share/runtime/globals.hpp
NonNMethodCodeHeapSizeJDK9uintxppc5*Mdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
NonNMethodCodeHeapSizeJDK9uintxs3905*Mdefine_pd_globalcpu/s390/c2_globals_s390.hpp
NonNMethodCodeHeapSizeJDK9uintxx865*Mdefine_pd_globalcpu/x86/c1_globals_x86.hpp
NonProfiledCodeHeapSizeJDK9intxaarch6413*Mdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
NonProfiledCodeHeapSizeJDK9size_tarm13*Mdefine_pd_globalcpu/arm/c2_globals_arm.hpp
NonProfiledCodeHeapSizeJDK9uintxcompiler0define_pd_globalshare/compiler/compiler_globals.hpp
NonProfiledCodeHeapSizeJDK9uintxruntimeproduct_pdSize of code heap with non-profiled methods (in bytes)share/runtime/globals.hpp
NonProfiledCodeHeapSizeJDK9uintxppc13*Mdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
NonProfiledCodeHeapSizeJDK9uintxs39021*Mdefine_pd_globalcpu/s390/c2_globals_s390.hpp
NonProfiledCodeHeapSizeJDK9uintxx8613*Mdefine_pd_globalcpu/x86/c1_globals_x86.hpp
NumberOfLoopInstrToAlignJDK6intxc24
range(0, max_jint)
productNumber of first instructions in a loop to alignshare/opto/c2_globals.hpp
OSROnlyBCIJDK6intxruntime-1developOSR only at this bci. Negative values mean exclude that bcishare/runtime/globals.hpp
ObjArrayMarkingStrideJDK6uintxgc2048developNumber of object array elements to push onto the marking stack before pushing a continuation entryshare/gc/shared/gc_globals.hpp
ObjectAlignmentInBytesJDK6intxruntime8
range(8, 256)
productDefault object alignment in bytes, 8 is minimumshare/runtime/globals.hpp
ObjectCountCutOffPercentJDK7doubleruntime0.5
range(0.0, 100.0)
productEXPERIMENTALshare/runtime/globals.hpp
OldPLABSizeJDK6size_tgc1024productSize of old gen promotion LAB's (in HeapWords)share/gc/shared/gc_globals.hpp
OldSizeJDK6size_tgcScaleForWordSize(4*M)
range(0, max_uintx)
productInitial tenured generation size (in bytes)share/gc/shared/gc_globals.hpp
OmitStackTraceInFastThrowJDK6boolruntimetrueproductOmit backtraces for some 'hot' exceptions in optimized codeshare/runtime/globals.hpp
OnErrorJDK6ccstrlistruntimeRun user-defined commands on fatal error; see VMError.cpp for examplesproductshare/runtime/globals.hpp
OnOutOfMemoryErrorJDK6ccstrlistruntimeRun user-defined commands on first java.lang.OutOfMemoryErrorproductshare/runtime/globals.hpp
OnStackReplacePercentageJDK6intxaarch64933define_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
OnStackReplacePercentageJDK6intxarm140define_pd_globalcpu/arm/c2_globals_arm.hpp
OnStackReplacePercentageJDK6intxcompiler0define_pd_globalshare/compiler/compiler_globals.hpp
OnStackReplacePercentageJDK6intxruntimeproduct_pdNON_TIERED number of method invocations/branches (expressed as % of CompileThreshold) before (re-)compiling OSR codeshare/runtime/globals.hpp
OnStackReplacePercentageJDK6intxppc1400define_pd_globalcpu/ppc/c1_globals_ppc.hpp
OnStackReplacePercentageJDK6intxs390140define_pd_globalcpu/s390/c2_globals_s390.hpp
OnStackReplacePercentageJDK6intxx86933define_pd_globalcpu/x86/c1_globals_x86.hpp
OptimizeExpensiveOpsJDK7boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
OptimizeFillJDK6boolc2true PPC64_ONLY(&& false)productconvert fill/copy loops into intrinsicshare/opto/c2_globals.hpp
OptimizeIfOpsJDK6boolc1truedevelopOptimize multiple IfOpsshare/c1/c1_globals.hpp
OptimizePollingPageLocationJDK7boolaixtrueproductOptimize the location of the polling page used for Safepointsos/aix/globals_aix.hpp
OptimizePtrCompareJDK6boolc2trueproductUse escape analysis to optimize pointers compareshare/opto/c2_globals.hpp
OptimizeSinglePrecisionJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
OptimizeSinglePrecisionJDK6boolarmtruedefine_pd_globalcpu/arm/c1_globals_arm.hpp
OptimizeSinglePrecisionJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
OptimizeSinglePrecisionJDK6bools390falsedefine_pd_globalcpu/s390/c1_globals_s390.hpp
OptimizeSinglePrecisionJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
OptimizeStringConcatJDK6boolc2trueproductOptimize the construction of Strings by StringBuildershare/opto/c2_globals.hpp
OptimizeUnsafesJDK6boolc1truedevelopOptimize raw unsafe opsshare/c1/c1_globals.hpp
OptoBlockListSizeJDK6intxc28
range(0, max_jint)
developStarting allocation size of Block_List data structuresshare/opto/c2_globals.hpp
OptoBreakpointC2RJDK6boolc2falsenotproductinsert breakpoint at runtime stub entryshare/opto/c2_globals.hpp
OptoBreakpointOSRJDK6boolc2falsenotproductinsert breakpoint at osr method entryshare/opto/c2_globals.hpp
OptoBreakpointJDK6boolc2falsedevelopinsert breakpoint at method entryshare/opto/c2_globals.hpp
OptoBundlingJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
OptoBundlingJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
OptoBundlingJDK6boolc2product_pdGenerate nops to fill i-cache linesshare/opto/c2_globals.hpp
OptoBundlingJDK6boolppcfalsedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
OptoBundlingJDK6bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
OptoBundlingJDK6boolx86falsedefine_pd_globalcpu/x86/c2_globals_x86.hpp
OptoCoalesceJDK6boolc2truedevelopUse Conservative Copy Coalescing in the Register Allocatorshare/opto/c2_globals.hpp
OptoLoopAlignmentJDK6intxaarch6416define_pd_globalcpu/aarch64/globals_aarch64.hpp
OptoLoopAlignmentJDK6intxarm16define_pd_globalcpu/arm/globals_arm.hpp
OptoLoopAlignmentJDK6intxruntimeproduct_pdAlign inner loops to zero relative to this modulusshare/runtime/globals.hpp
OptoLoopAlignmentJDK6intxppc16define_pd_globalcpu/ppc/globals_ppc.hpp
OptoLoopAlignmentJDK6intxs3902define_pd_globalcpu/s390/globals_s390.hpp
OptoLoopAlignmentJDK6intxx8616define_pd_globalcpu/x86/globals_x86.hpp
OptoLoopAlignmentJDK6intxzero16define_pd_globalcpu/zero/globals_zero.hpp
OptoNoExecuteJDK6boolc2falsenotproductAttempt to parse and compile but do not execute generated codeshare/opto/c2_globals.hpp
OptoNodeListSizeJDK6intxc24
range(0, max_jint)
developStarting allocation size of Node_List data structuresshare/opto/c2_globals.hpp
OptoPeepholeAtJDK6intxc2-1developApply peephole optimizations to this peephole ruleshare/opto/c2_globals.hpp
OptoPeepholeJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
OptoPeepholeJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
OptoPeepholeJDK6boolc2develop_pdApply peephole optimizations after register allocationshare/opto/c2_globals.hpp
OptoPeepholeJDK6boolppcfalsedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
OptoPeepholeJDK6bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
OptoPeepholeJDK6boolx86truedefine_pd_globalcpu/x86/c2_globals_x86.hpp
OptoPrologueNopsJDK6intxc20
range(0, 128)
developInsert this many extra nop instructions in the prologue of every nmethodshare/opto/c2_globals.hpp
OptoRegSchedulingJDK9boolaarch64falsedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
OptoRegSchedulingJDK9boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
OptoRegSchedulingJDK9boolc2product_pdInstruction Scheduling before register allocation for pressureshare/opto/c2_globals.hpp
OptoRegSchedulingJDK9boolppcfalsedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
OptoRegSchedulingJDK9bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
OptoRegSchedulingJDK9boolx86truedefine_pd_globalcpu/x86/c2_globals_x86.hpp
OptoRemoveUselessJDK6boolc2truedevelopRemove useless nodes after parsingshare/opto/c2_globals.hpp
OptoSchedulingJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
OptoSchedulingJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
OptoSchedulingJDK6boolc2product_pdInstruction Scheduling after register allocationshare/opto/c2_globals.hpp
OptoSchedulingJDK6boolppcfalsedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
OptoSchedulingJDK6bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
OptoSchedulingJDK6boolx86falsedefine_pd_globalcpu/x86/c2_globals_x86.hpp
PLABWeightJDK6uintxgc75
range(0, 100)
productPercentage (0-100) used to weight the current sample when computing exponentially decaying average for ResizePLABshare/gc/shared/gc_globals.hpp
PSAdaptiveSizePolicyResizeVirtualSpaceAlotJDK6intxgc-1
range(-1, 1)
developResize the virtual spaces of the young or old generationsshare/gc/shared/gc_globals.hpp
PSChunkLargeArraysJDK6boolgctrueproductProcess large arrays in chunksshare/gc/parallel/parallel_globals.hpp
ParGCArrayScanChunkJDK6intgc50
range(1, max_jint/3)
productScan a subset of object array and push remainder, if array is bigger than thisshare/gc/shared/gc_globals.hpp
ParallelGCBufferWastePctJDK6uintxgc10
range(0, 100)
productWasted fraction of parallel allocation buffershare/gc/shared/gc_globals.hpp
ParallelGCThreadsJDK6uintgc0productNumber of parallel threads parallel gc will useshare/gc/shared/gc_globals.hpp
ParallelOldDeadWoodLimiterMeanJDK6size_tgc50
range(0, 100)
productThe mean used by the parallel compact dead wood limiter (a number between 0-100)share/gc/parallel/parallel_globals.hpp
ParallelOldDeadWoodLimiterStdDevJDK6size_tgc80
range(0, 100)
productThe standard deviation used by the parallel compact dead wood limiter (a number between 0-100)share/gc/parallel/parallel_globals.hpp
ParallelRefProcBalancingEnabledJDK6boolgctrueproductEnable balancing of reference processing queuesshare/gc/shared/gc_globals.hpp
ParallelRefProcEnabledJDK6boolgcfalseproductEnable parallel reference processing whenever possibleshare/gc/shared/gc_globals.hpp
PartialPeelAtUnsignedTestsJDK6boolc2trueproductPartial peel at unsigned tests if no signed test existsshare/opto/c2_globals.hpp
PartialPeelLoopJDK6boolc2trueproductPartial peel (rotate) loopsshare/opto/c2_globals.hpp
PartialPeelNewPhiDeltaJDK6intxc20
range(0, max_jint)
productAdditional phis that can be created by partial peelingshare/opto/c2_globals.hpp
PatchALotJDK6boolc1falsedevelopMarks all fields as having unloaded classesshare/c1/c1_globals.hpp
PauseAtExitJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PauseAtStartupFileJDK6ccstrruntimeNULLproductDIAGNOSTICshare/runtime/globals.hpp
PauseAtStartupJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PausePaddingJDK6uintxgc1
range(0, max_juint)
productHow much buffer to keep for pause timeshare/gc/shared/gc_globals.hpp
PerBytecodeRecompilationCutoffJDK6intxruntime200
range(-1, max_intx)
productPer-BCI limit on repeated recompilation (-1=>'Inf')share/runtime/globals.hpp
PerBytecodeTrapLimitJDK6intxruntime4
range(0, max_jint)
productLimit on traps (of one kind) at a particular BCIshare/runtime/globals.hpp
PerMethodRecompilationCutoffJDK6intxruntime400
range(-1, max_intx)
productAfter recompiling N times, stay in the interpreter (-1=>'Inf')share/runtime/globals.hpp
PerMethodSpecTrapLimitJDK8intxruntime5000
range(0, max_jint)
productEXPERIMENTALshare/runtime/globals.hpp
PerMethodTrapLimitJDK6intxruntime100
range(0, max_jint)
productLimit on traps (of one kind) in a method (includes inlines)share/runtime/globals.hpp
PerfAllowAtExitRegistrationJDK6boolruntimefalseproductAllow registration of atexit() methodsshare/runtime/globals.hpp
PerfBypassFileSystemCheckJDK6boolruntimefalseproductBypass Win32 file system criteria checks (Windows Only)share/runtime/globals.hpp
PerfDataMemorySizeJDK6intxruntime32*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.share/runtime/globals.hpp
PerfDataSamplingIntervalJDK6intxruntime50
range(PeriodicTask::min_interval, max_jint)
productData sampling interval (in milliseconds)share/runtime/globals.hpp
PerfDataSaveFileJDK6ccstrruntimeNULLproductSave PerfData memory to the specified absolute pathname. The string %p in the file name (if present) will be replaced by pidshare/runtime/globals.hpp
PerfDataSaveToFileJDK6boolruntimefalseproductSave PerfData memory to hsperfdata_<pid> file on exitshare/runtime/globals.hpp
PerfDisableSharedMemJDK6boolruntimefalseproductStore performance data in standard memoryshare/runtime/globals.hpp
PerfMaxStringConstLengthJDK6intxruntime1024
range(32, 32*K)
productMaximum PerfStringConstant string length before truncationshare/runtime/globals.hpp
PinAllInstructionsJDK6boolc1falsedevelopAll instructions are pinnedshare/c1/c1_globals.hpp
PoisonOSREntryJDK6boolc2truedevelopDetect abnormal calls to OSR codeshare/opto/c2_globals.hpp
PostLoopMultiversioningJDK9boolc2falseproductEXPERIMENTALshare/opto/c2_globals.hpp
PowerArchitecturePPC64JDK7uintxppc0productDIAGNOSTICcpu/ppc/globals_ppc.hpp
PreTouchParallelChunkSizeJDK9size_tgc1 * G
range(1, SIZE_MAX / 2)
productPer-thread chunk size for parallel memory pre-touch.share/gc/shared/gc_globals.hpp
PreallocatedOutOfMemoryErrorCountJDK6uintxruntime4developNumber of OutOfMemoryErrors preallocated with backtraceshare/runtime/globals.hpp
PreferContainerQuotaForCPUCountJDK11boollinuxtrueproductCalculate the container CPU availability based on the value of quotas (if set), when true. Otherwise, use the CPU shares value, provided it is less than quota.os/linux/globals_linux.hpp
PreferInterpreterNativeStubsJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
PreferInterpreterNativeStubsJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
PreferInterpreterNativeStubsJDK6boolcompilertruedefine_pd_globalshare/compiler/compiler_globals.hpp
PreferInterpreterNativeStubsJDK6boolruntimeproduct_pdUse always interpreter stubs for native methods invoked via interpretershare/runtime/globals.hpp
PreferInterpreterNativeStubsJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
PreferInterpreterNativeStubsJDK6bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
PreferInterpreterNativeStubsJDK6boolx86falsedefine_pd_globalcpu/x86/c1_globals_x86.hpp
PreferLAoverADDJDK9bools390falseproductDIAGNOSTICcpu/s390/globals_s390.hpp
PrefetchCopyIntervalInBytesJDK6intxgc-1
range(-1, max_jint)
productHow far ahead to prefetch destination area (<= 0 means off)share/gc/shared/gc_globals.hpp
PrefetchFieldsAheadJDK6intxgc-1
range(-1, max_jint)
productHow many fields ahead to prefetch in oop scan (<= 0 means off)share/gc/shared/gc_globals.hpp
PrefetchScanIntervalInBytesJDK6intxgc-1
range(-1, max_jint)
productHow far ahead to prefetch scan area (<= 0 means off)share/gc/shared/gc_globals.hpp
PreserveAllAnnotationsJDK6boolruntimefalseproductPreserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotationsshare/runtime/globals.hpp
PreserveFramePointerJDK8boolaarch64falsedefine_pd_globalcpu/aarch64/globals_aarch64.hpp
PreserveFramePointerJDK8boolarmfalsedefine_pd_globalcpu/arm/globals_arm.hpp
PreserveFramePointerJDK8boolruntimeproduct_pdUse the FP register for holding the frame pointer and not as a general purpose register.share/runtime/globals.hpp
PreserveFramePointerJDK8boolppcfalsedefine_pd_globalcpu/ppc/globals_ppc.hpp
PreserveFramePointerJDK8bools390falsedefine_pd_globalcpu/s390/globals_s390.hpp
PreserveFramePointerJDK8boolx86falsedefine_pd_globalcpu/x86/globals_x86.hpp
PreserveFramePointerJDK8boolzerofalsedefine_pd_globalcpu/zero/globals_zero.hpp
PretenureSizeThresholdJDK6size_tgc0
range(0, max_uintx)
productMaximum size in bytes of objects allocated in DefNew generation; zero means no maximumshare/gc/shared/gc_globals.hpp
PrintAOTStatisticsJDK9boolruntimefalsenotproductPrint AOT statisticsshare/runtime/globals.hpp
PrintAOTJDK9boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
PrintAdapterHandlersJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintAssemblyOptionsJDK6ccstrruntimeNULLproductDIAGNOSTICshare/runtime/globals.hpp
PrintAssemblyJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintBailoutsJDK6boolc1falsedevelopPrint bailout and its reasonshare/c1/c1_globals.hpp
PrintBiasedLockingStatisticsJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintBlockEliminationJDK6boolc1falsedevelopPrint basic block eliminationshare/c1/c1_globals.hpp
PrintBootstrapJDK9booljvmcitrueproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
PrintBytecodeHistogramJDK6boolruntimefalsedevelopPrint histogram of the executed bytecodesshare/runtime/globals.hpp
PrintBytecodePairHistogramJDK6boolruntimefalsedevelopPrint histogram of the executed bytecode pairsshare/runtime/globals.hpp
PrintC1StatisticsJDK6boolc1falsenotproductPrint Compiler1 statisticsshare/c1/c1_globals.hpp
PrintCEEJDK6boolc1falsedevelopPrint Conditional Expression Eliminationshare/c1/c1_globals.hpp
PrintCFG0JDK6boolc1falsenotproductPrint control flow graph after constructionshare/c1/c1_globals.hpp
PrintCFG1JDK6boolc1falsenotproductPrint control flow graph after optimizationsshare/c1/c1_globals.hpp
PrintCFG2JDK6boolc1falsenotproductPrint control flow graph before code generationshare/c1/c1_globals.hpp
PrintCFGBlockFreqJDK6boolc2falsedevelopPrint CFG block freqenciesshare/opto/c2_globals.hpp
PrintCFGToFileJDK6boolc1falsedevelopprint control flow graph to a separate file during compilationshare/c1/c1_globals.hpp
PrintCFGJDK6boolc1falsenotproductPrint control flow graph after each changeshare/c1/c1_globals.hpp
PrintCanonicalizationJDK6boolc1falsedevelopPrint graph node canonicalizationshare/c1/c1_globals.hpp
PrintClassHistogramJDK6boolruntimefalseproductMANAGEABLEshare/runtime/globals.hpp
PrintCodeCache2JDK6boolruntimefalsedevelopPrint detailed usage information on the code cache when exitingshare/runtime/globals.hpp
PrintCodeCacheExtensionJDK6boolruntimefalsedevelopPrint extension of code cacheshare/runtime/globals.hpp
PrintCodeCacheOnCompilationJDK8boolruntimefalseproductPrint the code cache memory usage each time a method is compiledshare/runtime/globals.hpp
PrintCodeCacheJDK6boolruntimefalseproductPrint the code cache memory usage when exitingshare/runtime/globals.hpp
PrintCodeHeapAnalyticsJDK12boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintCommandLineFlagsJDK6boolruntimefalseproductPrint flags specified on command line or set by ergonomicsshare/runtime/globals.hpp
PrintCompilation2JDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintCompilationJDK6boolruntimefalseproductPrint compilationsshare/runtime/globals.hpp
PrintConcurrentLocksJDK6boolruntimefalseproductMANAGEABLEshare/runtime/globals.hpp
PrintDebugInfoJDK6boolruntimefalsedevelopPrint debug information for all nmethods when generatedshare/runtime/globals.hpp
PrintDeoptimizationDetailsJDK9boolruntimefalsedevelopPrint more information about deoptimizationshare/runtime/globals.hpp
PrintDependenciesJDK6boolruntimefalsedevelopPrint dependency information for all nmethods when generatedshare/runtime/globals.hpp
PrintDominatorsJDK6boolc2falsedevelopPrint out dominator trees for GVNshare/opto/c2_globals.hpp
PrintEliminateAllocationsJDK6boolc2falsenotproductPrint out when allocations are eliminatedshare/opto/c2_globals.hpp
PrintEliminateLocksJDK6boolc2falsenotproductPrint out when locks are eliminatedshare/opto/c2_globals.hpp
PrintEscapeAnalysisJDK6boolc2falsenotproductPrint the results of escape analysisshare/opto/c2_globals.hpp
PrintExceptionHandlersJDK6boolruntimefalsedevelopPrint exception handler tables for all nmethods when generatedshare/runtime/globals.hpp
PrintExtendedThreadInfoJDK11boolruntimefalseproductPrint more information in thread dumpshare/runtime/globals.hpp
PrintFieldLayoutJDK8boolruntimefalsenotproductPrint field layout for each classshare/runtime/globals.hpp
PrintFlagsFinalJDK6boolruntimefalseproductPrint all VM flags after argument and ergonomic processingshare/runtime/globals.hpp
PrintFlagsInitialJDK6boolruntimefalseproductPrint all VM flags before argument processing and exit VMshare/runtime/globals.hpp
PrintFlagsRangesJDK9boolruntimefalseproductPrint VM flags and their rangesshare/runtime/globals.hpp
PrintFlagsWithCommentsJDK6boolruntimefalsenotproductPrint all VM flags with default values and descriptions and exitshare/runtime/globals.hpp
PrintFrameConverterAssemblyJDK6boolc2falsenotproductPrint New compiler assembly output for frame convertersshare/opto/c2_globals.hpp
PrintGCDetailsJDK6boolgcfalseproductPrint more details at garbage collection. Deprecated, use -Xlog:gc* instead.share/gc/shared/gc_globals.hpp
PrintGCJDK6boolgcfalseproductPrint message at garbage collection. Deprecated, use -Xlog:gc instead.share/gc/shared/gc_globals.hpp
PrintHeapAtSIGBREAKJDK6boolruntimetrueproductPrint heap layout in response to SIGBREAKshare/runtime/globals.hpp
PrintIR0JDK6boolc1falsenotproductPrint full intermediate representation after constructionshare/c1/c1_globals.hpp
PrintIR1JDK6boolc1falsenotproductPrint full intermediate representation after optimizationsshare/c1/c1_globals.hpp
PrintIR2JDK6boolc1falsenotproductPrint full intermediate representation before code generationshare/c1/c1_globals.hpp
PrintIRDuringConstructionJDK6boolc1falsenotproductPrint IR as it's being constructed (helpful for debugging frontend)share/c1/c1_globals.hpp
PrintIRWithLIRJDK6boolc1falsenotproductPrint IR instructions with generated LIRshare/c1/c1_globals.hpp
PrintIRJDK6boolc1falsenotproductPrint full intermediate representation after each changeshare/c1/c1_globals.hpp
PrintIdealGraphAddressJDK6ccstrc2127.0.0.1notproductIP address to connect to visualizershare/opto/c2_globals.hpp
PrintIdealGraphFileJDK6ccstrc2NULLnotproductFile to dump ideal graph to. If set overrides the use of the networkshare/opto/c2_globals.hpp
PrintIdealGraphLevelJDK6intxc20
range(-1, 4)
notproductLevel of detail of the ideal graph printout. System-wide value, -1=printing is disabled,
0=print nothing except IGVPrintLevel directives,
4=all details printed. Level of detail of printouts can be set on a per-method level as well by using CompileCommand=option.
share/opto/c2_globals.hpp
PrintIdealGraphPortJDK6intxc24444
range(0, SHRT_MAX)
notproductIdeal graph printer to network portshare/opto/c2_globals.hpp
PrintIdealGraphJDK9boolc2falsenotproductPrint ideal graph to XML file / network interface. By default attempts to connect to the visualizer on a socket.share/opto/c2_globals.hpp
PrintIdealIndentThresholdJDK16uintxc20notproductA depth threshold of ideal graph. Indentation is disabled when users attempt to dump an ideal graph deeper than it.share/opto/c2_globals.hpp
PrintIdealNodeCountJDK7boolc2falsenotproductPrint liveness counts of ideal nodesshare/opto/c2_globals.hpp
PrintIdealJDK6boolc2falsenotproductPrint ideal graph before code generationshare/opto/c2_globals.hpp
PrintInitialBlockListJDK6boolc1falsenotproductPrint block list of BlockListBuildershare/c1/c1_globals.hpp
PrintInliningJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintInterpreterJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintIntrinsicsJDK6boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
PrintLIRWithAssemblyJDK6boolc1falsenotproductShow LIR instruction with generated assemblyshare/c1/c1_globals.hpp
PrintLIRJDK6boolc1falsedevelopprint low-level IRshare/c1/c1_globals.hpp
PrintLockStatisticsJDK6boolc2falsenotproductPrint precise statistics on the dynamic lock usageshare/opto/c2_globals.hpp
PrintMethodDataJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintMethodFlushingStatisticsJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintMethodFlushingJDK6boolruntimefalsedevelopPrint the nmethods being flushedshare/runtime/globals.hpp
PrintMethodHandleStubsJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintMiscellaneousJDK6boolruntimefalsedevelopPrint uncategorized debugging information (requires +Verbose)share/runtime/globals.hpp
PrintNMTStatisticsJDK7boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintNMethodStatisticsJDK9boolruntimefalsenotproductPrint a summary statistic for the generated nmethodsshare/runtime/globals.hpp
PrintNMethodsJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintNativeNMethodsJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintNotLoadedJDK6boolc1falsedevelopPrints where classes are not loaded during code generationshare/c1/c1_globals.hpp
PrintNullCheckEliminationJDK6boolc1falsedevelopPrint null check eliminationshare/c1/c1_globals.hpp
PrintOptimizePtrCompareJDK6boolc2falsenotproductPrint information about optimized pointers compareshare/opto/c2_globals.hpp
PrintOptimizeStringConcatJDK6boolc2falsenotproductPrint information about transformations performed on Stringsshare/opto/c2_globals.hpp
PrintOptoAssemblyJDK6boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
PrintOptoInliningJDK6boolc2falsenotproductPrint compiler2 inlining decisionsshare/opto/c2_globals.hpp
PrintOptoPeepholeJDK6boolc2falsenotproductPrint New compiler peephole replacementsshare/opto/c2_globals.hpp
PrintOptoStatisticsJDK6boolc2falsenotproductPrint New compiler statisticsshare/opto/c2_globals.hpp
PrintOptoJDK6boolc2falsenotproductPrint compiler2 attemptsshare/opto/c2_globals.hpp
PrintParseStatisticsJDK6boolc2falsenotproductPrint nodes, transforms and new values made per bytecode parsedshare/opto/c2_globals.hpp
PrintPhiFunctionsJDK6boolc1falsenotproductPrint phi functions when they are created and simplifiedshare/c1/c1_globals.hpp
PrintPreciseBiasedLockingStatisticsJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
PrintPreciseRTMLockingStatisticsJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
PrintRelocationsJDK6boolruntimefalsedevelopPrint relocation information for all nmethods when generatedshare/runtime/globals.hpp
PrintRewritesJDK6boolruntimefalsenotproductPrint methods that are being rewrittenshare/runtime/globals.hpp
PrintSharedArchiveAndExitJDK8boolruntimefalseproductPrint shared archive file contentsshare/runtime/globals.hpp
PrintSharedDictionaryJDK8boolruntimefalseproductIf PrintSharedArchiveAndExit is true, also print the shared dictionaryshare/runtime/globals.hpp
PrintSignatureHandlersJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintSimpleStubsJDK6boolc1falsenotproductPrint SimpleStubsshare/c1/c1_globals.hpp
PrintStringTableStatisticsJDK6boolruntimefalseproductprint statistics about the StringTable and SymbolTableshare/runtime/globals.hpp
PrintStubCodeJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintSymbolTableSizeHistogramJDK6boolruntimefalsenotproductprint histogram of the symbol tableshare/runtime/globals.hpp
PrintSystemDictionaryAtExitJDK6boolruntimefalsenotproductPrint the system dictionary at exitshare/runtime/globals.hpp
PrintTieredEventsJDK6boolruntimefalseproductPrint tiered events notificationsshare/runtime/globals.hpp
PrintTouchedMethodsAtExitJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
PrintUnsafeOptimizationJDK6boolc1falsedevelopPrint optimization of raw unsafe opsshare/c1/c1_globals.hpp
PrintVMOptionsJDK6boolruntimefalseproductPrint flags that appeared on the command lineshare/runtime/globals.hpp
PrintValueNumberingJDK6boolc1falsedevelopPrint Value Numberingshare/c1/c1_globals.hpp
PrintVtableStatsJDK6boolruntimefalsenotproductprint vtables stats at end of runshare/runtime/globals.hpp
PrintWarningsJDK6boolruntimetrueproductPrint JVM warnings to output streamshare/runtime/globals.hpp
ProcessDistributionStrideJDK6uintxruntime4
range(0, max_juint)
productStride through processors when distributing processesshare/runtime/globals.hpp
ProfileDynamicTypesJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
ProfileInterpreterJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
ProfileInterpreterJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
ProfileInterpreterJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
ProfileInterpreterJDK6boolruntimeproduct_pdProfile at the bytecode level during interpretationshare/runtime/globals.hpp
ProfileInterpreterJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
ProfileInterpreterJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
ProfileInterpreterJDK6boolx86falsedefine_pd_globalcpu/x86/c1_globals_x86.hpp
ProfileMaturityPercentageJDK6intxruntime20
range(0, 100)
productnumber of method invocations/branches (expressed as % of CompileThreshold) before using the method's profileshare/runtime/globals.hpp
ProfileTrapsJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
ProfileTrapsJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
ProfileTrapsJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
ProfileTrapsJDK6boolruntimedevelop_pdProfile deoptimization traps at the bytecode levelshare/runtime/globals.hpp
ProfileTrapsJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
ProfileTrapsJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
ProfileTrapsJDK6boolx86falsedefine_pd_globalcpu/x86/c1_globals_x86.hpp
ProfiledCodeHeapSizeJDK9intxaarch6414*Mdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
ProfiledCodeHeapSizeJDK9size_tarm14*Mdefine_pd_globalcpu/arm/c2_globals_arm.hpp
ProfiledCodeHeapSizeJDK9uintxcompiler0define_pd_globalshare/compiler/compiler_globals.hpp
ProfiledCodeHeapSizeJDK9uintxruntimeproduct_pdSize of code heap with profiled methods (in bytes)share/runtime/globals.hpp
ProfiledCodeHeapSizeJDK9uintxppc14*Mdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
ProfiledCodeHeapSizeJDK9uintxs39022*Mdefine_pd_globalcpu/s390/c2_globals_s390.hpp
ProfiledCodeHeapSizeJDK9uintxx8614*Mdefine_pd_globalcpu/x86/c1_globals_x86.hpp
PromotedPaddingJDK6uintxgc3
range(0, max_juint)
productHow much buffer to keep for promotion failureshare/gc/shared/gc_globals.hpp
PromotionFailureALotCountJDK6uintxgc1000developNumber of promotion failures occurring at PLAB promotion attempts at young collectorsshare/gc/shared/gc_globals.hpp
PromotionFailureALotIntervalJDK6uintxgc5developTotal collections between promotion failures a lotshare/gc/shared/gc_globals.hpp
PromotionFailureALotJDK6boolgcfalsenotproductUse promotion failure handling on every youngest generation collectionshare/gc/shared/gc_globals.hpp
ProtectionDomainVerificationJDK6boolruntimetruedevelopVerify protection domain before resolution in system dictionaryshare/runtime/globals.hpp
QueuedAllocationWarningCountJDK6uintxgc0
range(0, max_uintx)
productNumber of times an allocation that queues behind a GC will retry before printing a warningshare/gc/shared/gc_globals.hpp
RTMAbortRatioJDK8intppc50
range(0, 100) /* natural range */
productEXPERIMENTALcpu/ppc/globals_ppc.hpp
RTMAbortRatioJDK8intx8650
range(0, 100) /* natural range */
productEXPERIMENTALcpu/x86/globals_x86.hpp
RTMAbortThresholdJDK8intppc1000
range(0, max_jint)
productEXPERIMENTALcpu/ppc/globals_ppc.hpp
RTMAbortThresholdJDK8intx861000
range(0, max_jint)
productEXPERIMENTALcpu/x86/globals_x86.hpp
RTMLockingCalculationDelayJDK8intxppc0productEXPERIMENTALcpu/ppc/globals_ppc.hpp
RTMLockingCalculationDelayJDK8intxx860productEXPERIMENTALcpu/x86/globals_x86.hpp
RTMLockingThresholdJDK8intppc10000
range(0, max_jint)
productEXPERIMENTALcpu/ppc/globals_ppc.hpp
RTMLockingThresholdJDK8intx8610000
range(0, max_jint)
productEXPERIMENTALcpu/x86/globals_x86.hpp
RTMRetryCountJDK8intppc5
range(0, max_jint)
productNumber of RTM retries on lock abort or busycpu/ppc/globals_ppc.hpp
RTMRetryCountJDK8intx865
range(0, max_jint)
productNumber of RTM retries on lock abort or busycpu/x86/globals_x86.hpp
RTMSpinLoopCountJDK8intppc100
range(0, 32767) /* immediate operand limit on ppc */
productEXPERIMENTALcpu/ppc/globals_ppc.hpp
RTMSpinLoopCountJDK8intx86100
range(0, max_jint)
productEXPERIMENTALcpu/x86/globals_x86.hpp
RTMTotalCountIncrRateJDK8intppc64
range(1, 32767) /* immediate operand limit on ppc */
productEXPERIMENTALcpu/ppc/globals_ppc.hpp
RTMTotalCountIncrRateJDK8intx8664
range(1, max_jint)
productEXPERIMENTALcpu/x86/globals_x86.hpp
RangeCheckEliminationJDK6boolruntimetrueproductEliminate range checksshare/runtime/globals.hpp
ReassociateInvariantsJDK6boolc2trueproductEnable reassociation of expressions with loop invariants.share/opto/c2_globals.hpp
ReduceBulkZeroingJDK6boolc2trueproductWhen bulk-initializing, try to avoid needless zeroingshare/opto/c2_globals.hpp
ReduceFieldZeroingJDK6boolc2trueproductWhen initializing fields, try to avoid needless zeroingshare/opto/c2_globals.hpp
ReduceInitialCardMarksJDK6boolc2trueproductWhen initializing fields, try to avoid needless card marksshare/opto/c2_globals.hpp
ReduceNumberOfCompilerThreadsJDK11boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
ReduceSignalUsageJDK6boolruntimefalseproductReduce the use of OS signals in Java and/or the VMshare/runtime/globals.hpp
RefDiscoveryPolicyJDK6intxgc0
range(ReferenceProcessor::DiscoveryPolicyMin,
productSelect type of reference discovery policy: reference-based(0) or referent-based(1)share/gc/shared/gc_globals.hpp
ReferencesPerThreadJDK11size_tgc1000productEXPERIMENTALshare/gc/shared/gc_globals.hpp
RegisterCostAreaRatioJDK6intxaarch6416000define_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
RegisterCostAreaRatioJDK6intxarm16000define_pd_globalcpu/arm/c2_globals_arm.hpp
RegisterCostAreaRatioJDK6intxc2develop_pdSpill selection in reg allocator: scale area by (X/64K) before adding costshare/opto/c2_globals.hpp
RegisterCostAreaRatioJDK6intxppc16000define_pd_globalcpu/ppc/c2_globals_ppc.hpp
RegisterCostAreaRatioJDK6intxs39012000define_pd_globalcpu/s390/c2_globals_s390.hpp
RegisterCostAreaRatioJDK6intxx8616000define_pd_globalcpu/x86/c2_globals_x86.hpp
RegisterFinalizersAtInitJDK6boolruntimetrueproductRegister finalizable objects at end of Object.<init> or after allocationshare/runtime/globals.hpp
RegisterReferencesJDK6boolruntimetruedevelopTell whether the VM should register soft/weak/final/phantom referencesshare/runtime/globals.hpp
RelaxAccessControlCheckJDK6boolruntimefalseproductRelax the access control checks in the verifiershare/runtime/globals.hpp
RenumberLiveNodesJDK8boolc2truedevelopRenumber live nodesshare/opto/c2_globals.hpp
ReoptimizeCallSequencesJDK7boolppctrueproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
ReoptimizeCallSequencesJDK7bools390trueproductDIAGNOSTICcpu/s390/globals_s390.hpp
RepeatCompilationJDK16intxruntime0
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
ReplayCompilesJDK8boolruntimefalsedevelopEnable replay of compilations from ReplayDataFileshare/runtime/globals.hpp
ReplayDataFileJDK8ccstrruntimeNULLproductFile containing compilation replay information[default: ./replay_pid%p.log] (%p replaced with pid)share/runtime/globals.hpp
ReplayIgnoreInitErrorsJDK8boolruntimefalsedevelopIgnore exceptions thrown during initialization for replayshare/runtime/globals.hpp
ReplaySuppressInitializersJDK8intxruntime2
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
share/runtime/globals.hpp
RequireSharedSpacesJDK6boolruntimefalseproductRequire shared spaces for metadatashare/runtime/globals.hpp
ReservedCodeCacheSizeJDK6intxaarch6432*Mdefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
ReservedCodeCacheSizeJDK6size_tarm32*Mdefine_pd_globalcpu/arm/c2_globals_arm.hpp
ReservedCodeCacheSizeJDK6uintxcompiler32*Mdefine_pd_globalshare/compiler/compiler_globals.hpp
ReservedCodeCacheSizeJDK6uintxruntimeproduct_pdReserved code cache size (in bytes) - maximum code cache sizeshare/runtime/globals.hpp
ReservedCodeCacheSizeJDK6uintxppc32*Mdefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
ReservedCodeCacheSizeJDK6uintxs39048*Mdefine_pd_globalcpu/s390/c2_globals_s390.hpp
ReservedCodeCacheSizeJDK6uintxx8632*Mdefine_pd_globalcpu/x86/c1_globals_x86.hpp
ResizePLABJDK6boolgctrueproductDynamically resize (survivor space) promotion LAB'sshare/gc/shared/gc_globals.hpp
ResizeTLABJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
ResizeTLABJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
ResizeTLABJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
ResizeTLABJDK6boolgcproduct_pdDynamically resize TLAB size for threadsshare/gc/shared/gc_globals.hpp
ResizeTLABJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
ResizeTLABJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
ResizeTLABJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
RestoreMXCSROnJNICallsJDK6boolruntimefalseproductRestore MXCSR when returning from JNI callsshare/runtime/globals.hpp
RestrictContendedJDK8boolruntimetrueproductRestrict @Contended to trusted classesshare/runtime/globals.hpp
RestrictReservedStackJDK9boolruntimetrueproductRestrict @ReservedStackAccess to trusted classesshare/runtime/globals.hpp
RewriteBytecodesJDK6boolaarch64truedefine_pd_globalcpu/aarch64/globals_aarch64.hpp
RewriteBytecodesJDK6boolarmtruedefine_pd_globalcpu/arm/globals_arm.hpp
RewriteBytecodesJDK6boolruntimeproduct_pdAllow rewriting of bytecodes (bytecodes are not immutable)share/runtime/globals.hpp
RewriteBytecodesJDK6boolppctruedefine_pd_globalcpu/ppc/globals_ppc.hpp
RewriteBytecodesJDK6bools390truedefine_pd_globalcpu/s390/globals_s390.hpp
RewriteBytecodesJDK6boolx86truedefine_pd_globalcpu/x86/globals_x86.hpp
RewriteBytecodesJDK6boolzerotruedefine_pd_globalcpu/zero/globals_zero.hpp
RewriteFrequentPairsJDK6boolaarch64truedefine_pd_globalcpu/aarch64/globals_aarch64.hpp
RewriteFrequentPairsJDK6boolarmtruedefine_pd_globalcpu/arm/globals_arm.hpp
RewriteFrequentPairsJDK6boolruntimeproduct_pdRewrite frequently used bytecode pairs into a single bytecodeshare/runtime/globals.hpp
RewriteFrequentPairsJDK6boolppctruedefine_pd_globalcpu/ppc/globals_ppc.hpp
RewriteFrequentPairsJDK6bools390truedefine_pd_globalcpu/s390/globals_s390.hpp
RewriteFrequentPairsJDK6boolx86truedefine_pd_globalcpu/x86/globals_x86.hpp
RewriteFrequentPairsJDK6boolzerotruedefine_pd_globalcpu/zero/globals_zero.hpp
SafepointALotJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
SafepointTimeoutDelayJDK6intxruntime10000
range(0, max_intx LP64_ONLY(/MICROUNITS))
productDelay in milliseconds for option SafepointTimeoutshare/runtime/globals.hpp
SafepointTimeoutJDK6boolruntimefalseproductTime out and warn or fail after SafepointTimeoutDelay milliseconds if failed to reach safepointshare/runtime/globals.hpp
ScavengeALotIntervalJDK6intxgc1notproductInterval between which scavenge will occur with +ScavengeALotshare/gc/shared/gc_globals.hpp
ScavengeALotJDK6boolgcfalsenotproductForce scavenge at every Nth exit from the runtime system (N=ScavengeALotInterval)share/gc/shared/gc_globals.hpp
ScavengeBeforeFullGCJDK6boolgctrueproductScavenge youngest generation before each full GC.share/gc/shared/gc_globals.hpp
ScavengeRootsInCodeJDK6intxruntime2
range(0, 2)
productDIAGNOSTICshare/runtime/globals.hpp
SegmentedCodeCacheJDK9boolruntimefalseproductUse a segmented code cacheshare/runtime/globals.hpp
SelectivePhiFunctionsJDK6boolc1truedevelopcreate phi functions at loop headers only when necessaryshare/c1/c1_globals.hpp
SelfDestructTimerJDK6intxruntime0
range(0, max_intx)
productWill cause VM to terminate after a given time (in minutes) (0 means off)share/runtime/globals.hpp
SerializeVMOutputJDK6boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
SharedArchiveConfigFileJDK10ccstrruntimeNULLproductData to add to the CDS archive fileshare/runtime/globals.hpp
SharedArchiveFileJDK8ccstrruntimeNULLproductOverride the default location of the CDS archive fileshare/runtime/globals.hpp
SharedBaseAddressJDK8size_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 datashare/runtime/globals.hpp
SharedClassListFileJDK8ccstrruntimeNULLproductOverride the default CDS class listshare/runtime/globals.hpp
SharedSymbolTableBucketSizeJDK9uintxruntime4
range(2, 246)
productAverage number of symbols per bucket in shared tableshare/runtime/globals.hpp
ShenandoahAllocFailureALotJDK11boolgcfalseproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahAllocSpikeFactorJDK11uintxgc5
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahAllocationThresholdJDK11uintxgc0
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahAlwaysClearSoftRefsJDK11boolgcfalseproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahCASBarrierJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahCloneBarrierJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahControlIntervalAdjustPeriodJDK11uintxgc1000productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahControlIntervalMaxJDK11uintxgc10productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahControlIntervalMinJDK11uintxgc1productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahCriticalFreeThresholdJDK11uintxgc1
range(0, 100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahDegeneratedGCJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahElasticTLABJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahEvacReserveOverflowJDK11boolgctrueproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahEvacReserveJDK11uintxgc5
range(1,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahEvacWasteJDK11doublegc1.2
range(1.0,100.0)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahFullGCThresholdJDK11uintxgc3productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahGCHeuristicsJDK11ccstrgcadaptiveproductGC heuristics to use. This fine-tunes the GC mode selected, by choosing when to start the GC, how much to process on each cycle, and what other features to automatically enable. Possible values are: adaptive - adapt to maintain the given amount of free heap at all times, even during the GC cycle; static - trigger GC when free heap falls below the threshold; aggressive - run GC continuously, try to evacuate everything; compact - run GC more frequently and with deeper targets to free up more memory.share/gc/shenandoah/shenandoah_globals.hpp
ShenandoahGCModeJDK11ccstrgcsatbproductGC mode to use. Among other things, this defines which barriers are in in use. Possible values are: satb - snapshot-at-the-beginning concurrent GC (three pass mark-evac-update); iu - incremental-update concurrent GC (three pass mark-evac-update); passive - stop the world GC only (either degenerated or full)share/gc/shenandoah/shenandoah_globals.hpp
ShenandoahGarbageThresholdJDK11uintxgc25
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahGuaranteedGCIntervalJDK11uintxgc5*60*1000productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahHumongousMovesJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahHumongousThresholdJDK11intxgc100
range(1, 100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahImmediateThresholdJDK11uintxgc90
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahImplicitGCInvokesConcurrentJDK11boolgcfalseproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahInitFreeThresholdJDK11uintxgc70
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahLearningStepsJDK11uintxgc5
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahLoadRefBarrierJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahLoopOptsAfterExpansionJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahMarkLoopStrideJDK11uintxgc1000productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahMarkScanPrefetchJDK11intxgc32
range(0, 256)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahMaxRegionSizeJDK11size_tgc32 * MproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahMinFreeThresholdJDK11uintxgc10
range(0,100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahMinRegionSizeJDK11size_tgc256 * KproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahOOMDuringEvacALotJDK11boolgcfalseproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahPacingCycleSlackJDK11uintxgc10
range(0, 100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahPacingIdleSlackJDK11uintxgc2
range(0, 100)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahPacingMaxDelayJDK11uintxgc10productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahPacingSurchargeJDK11doublegc1.1
range(1.0, 100.0)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahPacingJDK11boolgctrueproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahParallelRegionStrideJDK11uintxgc1024productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahPrecleanJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahRefProcFrequencyJDK11uintxgc5productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahRegionSamplingRateJDK11intgc40productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahRegionSamplingJDK11boolgcfalseproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahRegionSizeJDK11size_tgc0productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahSATBBarrierJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahSATBBufferFlushIntervalJDK11uintxgc100productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahSATBBufferSizeJDK11size_tgc1 * K
range(1, max_uintx)
productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahSelfFixingJDK11boolgctrueproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahStoreValEnqueueBarrierJDK11boolgcfalseproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahSuspendibleWorkersJDK11boolgcfalseproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahTargetNumRegionsJDK11size_tgc2048productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahUncommitDelayJDK11uintxgc5*60*1000productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahUncommitJDK11boolgctrueproductEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahUnloadClassesFrequencyJDK11uintxgc1productEXPERIMENTALshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahVerifyLevelJDK11intxgc4productDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShenandoahVerifyOptoBarriersJDK11boolgcfalsedevelopVerify no missing barriers in C2.share/gc/shenandoah/shenandoah_globals.hpp
ShenandoahVerifyJDK11boolgcfalseproductDIAGNOSTICshare/gc/shenandoah/shenandoah_globals.hpp
ShowCodeDetailsInExceptionMessagesJDK14boolruntimetrueproductMANAGEABLEshare/runtime/globals.hpp
ShowHiddenFramesJDK7boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
ShowMessageBoxOnErrorJDK6boolruntimefalseproductKeep process alive on VM fatal errorshare/runtime/globals.hpp
ShowRegistersOnAssertJDK11boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
ShrinkHeapInStepsJDK9boolruntimetrueproductWhen 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.share/runtime/globals.hpp
SoftMatchFailureJDK6boolc2trueInProductdevelopIf the DFA fails to match a node, print a message and bail outshare/opto/c2_globals.hpp
SoftMaxHeapSizeJDK13size_tgc0productMANAGEABLEshare/gc/shared/gc_globals.hpp
SoftRefLRUPolicyMSPerMBJDK6intxruntime1000
range(0, max_intx)
productNumber of milliseconds per MB of free space in the heapshare/runtime/globals.hpp
SoftwarePrefetchHintDistanceJDK10intaarch64-1
range(-1, 4096)
productUse prfm hint with specified distance in compiled code.Value -1 means off.cpu/aarch64/globals_aarch64.hpp
SpecTrapLimitExtraEntriesJDK8intxruntime3productEXPERIMENTALshare/runtime/globals.hpp
SpecialArraysEqualsJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
SpecialEncodeISOArrayJDK8boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
SpecialStringCompareToJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
SpecialStringEqualsJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
SpecialStringIndexOfJDK6boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
SplitIfBlocksJDK6boolc2trueproductClone compares and control flow through merge points to fold some branchesshare/opto/c2_globals.hpp
StackPrintLimitJDK6intxruntime100developnumber of stack frames to print in VM-level stack dumpshare/runtime/globals.hpp
StackRedPagesJDK6intxaarch64DEFAULT_STACK_RED_PAGESdefine_pd_globalcpu/aarch64/globals_aarch64.hpp
StackRedPagesJDK6intxarmDEFAULT_STACK_RED_PAGESdefine_pd_globalcpu/arm/globals_arm.hpp
StackRedPagesJDK6intxruntimeproduct_pdNumber of red zone (unrecoverable overflows) pages of size
4KB. If pages are bigger red zone is aligned up.
share/runtime/globals.hpp
StackRedPagesJDK6intxppcDEFAULT_STACK_RED_PAGESdefine_pd_globalcpu/ppc/globals_ppc.hpp
StackRedPagesJDK6intxs390DEFAULT_STACK_RED_PAGESdefine_pd_globalcpu/s390/globals_s390.hpp
StackRedPagesJDK6intxx86DEFAULT_STACK_RED_PAGESdefine_pd_globalcpu/x86/globals_x86.hpp
StackRedPagesJDK6intxzeroDEFAULT_STACK_RED_PAGESdefine_pd_globalcpu/zero/globals_zero.hpp
StackReservedPagesJDK9intxaarch64DEFAULT_STACK_RESERVED_PAGESdefine_pd_globalcpu/aarch64/globals_aarch64.hpp
StackReservedPagesJDK9intxarmDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalcpu/arm/globals_arm.hpp
StackReservedPagesJDK9intxruntimeproduct_pdNumber of reserved zone (reserved to annotated methods) pages of size 4KB. If pages are bigger reserved zone is aligned up.share/runtime/globals.hpp
StackReservedPagesJDK9intxppcDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalcpu/ppc/globals_ppc.hpp
StackReservedPagesJDK9intxs390DEFAULT_STACK_RESERVED_PAGESdefine_pd_globalcpu/s390/globals_s390.hpp
StackReservedPagesJDK9intxx86DEFAULT_STACK_RESERVED_PAGESdefine_pd_globalcpu/x86/globals_x86.hpp
StackReservedPagesJDK9intxzeroDEFAULT_STACK_RESERVED_PAGESdefine_pd_globalcpu/zero/globals_zero.hpp
StackShadowPagesJDK6intxaarch64DEFAULT_STACK_SHADOW_PAGESdefine_pd_globalcpu/aarch64/globals_aarch64.hpp
StackShadowPagesJDK6intxarmDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalcpu/arm/globals_arm.hpp
StackShadowPagesJDK6intxruntimeproduct_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.
share/runtime/globals.hpp
StackShadowPagesJDK6intxppcDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalcpu/ppc/globals_ppc.hpp
StackShadowPagesJDK6intxs390DEFAULT_STACK_SHADOW_PAGESdefine_pd_globalcpu/s390/globals_s390.hpp
StackShadowPagesJDK6intxx86DEFAULT_STACK_SHADOW_PAGESdefine_pd_globalcpu/x86/globals_x86.hpp
StackShadowPagesJDK6intxzeroDEFAULT_STACK_SHADOW_PAGESdefine_pd_globalcpu/zero/globals_zero.hpp
StackTraceInThrowableJDK6boolruntimetrueproductCollect backtrace in throwable when exception happensshare/runtime/globals.hpp
StackYellowPagesJDK6intxaarch64DEFAULT_STACK_YELLOW_PAGESdefine_pd_globalcpu/aarch64/globals_aarch64.hpp
StackYellowPagesJDK6intxarmDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalcpu/arm/globals_arm.hpp
StackYellowPagesJDK6intxruntimeproduct_pdNumber of yellow zone (recoverable overflows) pages of size
4KB. If pages are bigger yellow zone is aligned up.
share/runtime/globals.hpp
StackYellowPagesJDK6intxppcDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalcpu/ppc/globals_ppc.hpp
StackYellowPagesJDK6intxs390DEFAULT_STACK_YELLOW_PAGESdefine_pd_globalcpu/s390/globals_s390.hpp
StackYellowPagesJDK6intxx86DEFAULT_STACK_YELLOW_PAGESdefine_pd_globalcpu/x86/globals_x86.hpp
StackYellowPagesJDK6intxzeroDEFAULT_STACK_YELLOW_PAGESdefine_pd_globalcpu/zero/globals_zero.hpp
StartAggressiveSweepingAtJDK9uintxruntime10
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 cacheshare/runtime/globals.hpp
StartAttachListenerJDK6boolruntimefalseproductAlways start Attach Listener at VM startupshare/runtime/globals.hpp
StartFlightRecordingJDK11ccstrruntimeNULLproductStart flight recording with optionsshare/runtime/globals.hpp
StopInterpreterAtJDK6intxruntime0developStop interpreter execution at specified bytecode numbershare/runtime/globals.hpp
StressArrayCopyMacroNodeJDK9boolc2falsedevelopPerform ArrayCopy load/store replacement during IGVN onlyshare/opto/c2_globals.hpp
StressCodeAgingJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
StressCodeBuffersJDK6boolruntimefalsedevelopExercise code buffer expansion and other rare state changesshare/runtime/globals.hpp
StressCompiledExceptionHandlersJDK7boolruntimefalsedevelopExercise compiled exception handlersshare/runtime/globals.hpp
StressCriticalJNINativesJDK6boolruntimefalsenotproductExercise register saving code in critical nativesshare/runtime/globals.hpp
StressGCMJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
StressIGVNJDK16boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
StressLCMJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
StressLdcRewriteJDK6boolruntimefalseproductForce ldc -> ldc_w rewrite during RedefineClassesshare/runtime/globals.hpp
StressLinearScanJDK6boolc1falsedevelopscramble block order used by LinearScan (stress test)share/c1/c1_globals.hpp
StressLoopInvariantCodeMotionJDK8boolc1falsedevelopstress loop invariant code motionshare/c1/c1_globals.hpp
StressMethodHandleLinkerInliningJDK11boolc2falsedevelopStress inlining through method handle linkersshare/opto/c2_globals.hpp
StressRangeCheckEliminationJDK8boolc1falsedevelopstress Range Check Eliminationshare/c1/c1_globals.hpp
StressRecompilationJDK6boolc2falsedevelopRecompile each compiled method without subsuming loads or escape analysis.share/opto/c2_globals.hpp
StressReflectiveCodeJDK6boolc2falsedevelopUse inexact types at allocations, etc., to test reflectionshare/opto/c2_globals.hpp
StressRewriterJDK8boolruntimefalsedevelopStress linktime bytecode rewritingshare/runtime/globals.hpp
StressSeedJDK16uintc20
range(0, max_juint)
productDIAGNOSTICshare/opto/c2_globals.hpp
StringDeduplicationAgeThresholdJDK8uintxruntime3
range(1, markWord::max_age)
productA string must reach this age (or be promoted to an old region) to be considered for deduplicationshare/runtime/globals.hpp
StringDeduplicationRehashALotJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
StringDeduplicationResizeALotJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
StringTableSizeJDK6uintxruntimedefaultStringTableSize
range(minimumStringTableSize, 16777216ul /* 2^24 */)
productNumber of buckets in the interned String table (will be rounded to nearest higher power of 2)share/runtime/globals.hpp
SubsumeLoadsJDK6boolc2truedevelopAttempt to compile while subsuming loads into machine instructions.share/opto/c2_globals.hpp
SuperWordLoopUnrollAnalysisJDK9boolaarch64truedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
SuperWordLoopUnrollAnalysisJDK9boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
SuperWordLoopUnrollAnalysisJDK9boolc2product_pdMap number of unrolls for main loop via Superword Level Parallelism analysisshare/opto/c2_globals.hpp
SuperWordLoopUnrollAnalysisJDK9boolppctruedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
SuperWordLoopUnrollAnalysisJDK9bools390falsedefine_pd_globalcpu/s390/c2_globals_s390.hpp
SuperWordLoopUnrollAnalysisJDK9boolx86truedefine_pd_globalcpu/x86/c2_globals_x86.hpp
SuperWordRTDepCheckJDK6boolc2falsedevelopEnable runtime dependency checks.share/opto/c2_globals.hpp
SuperWordReductionsJDK9boolc2trueproductEnable reductions support in superword.share/opto/c2_globals.hpp
SuperwordUseVSXJDK10boolppcfalseproductUse Power8 VSX instructions for superword optimization.cpu/ppc/globals_ppc.hpp
SuppressErrorAtJDK6ccstrlistruntimeList of assertions (file:line) to muzzlenotproductshare/runtime/globals.hpp
SuppressFatalErrorMessageJDK6boolruntimefalseproductReport NO fatal error message (avoid deadlock)share/runtime/globals.hpp
SurvivorAlignmentInBytesJDK8intxruntime0
range(8, 256)
productEXPERIMENTALshare/runtime/globals.hpp
SurvivorPaddingJDK6uintxgc3
range(0, max_juint)
productHow much buffer to keep for survivor overflowshare/gc/shared/gc_globals.hpp
SurvivorRatioJDK6uintxgc8
range(1, max_uintx-2)
productRatio of eden/survivor space sizeshare/gc/shared/gc_globals.hpp
SuspendRetryCountJDK6intxruntime50
range(0, max_intx)
productMaximum retry count for an external suspend requestshare/runtime/globals.hpp
SuspendRetryDelayJDK6intxruntime5
range(0, max_intx)
productMilliseconds to delay per retry (* current_retry_count)share/runtime/globals.hpp
SweeperLogEntriesJDK6intxruntime1024notproductNumber of records in the ring buffer of sweeper activityshare/runtime/globals.hpp
SweeperThresholdJDK15doubleruntime0.5
range(0.0, 100.0)
productThreshold controlling when code cache sweeper is invoked.Value is percentage of ReservedCodeCacheSize.share/runtime/globals.hpp
SymbolTableSizeJDK8uintxruntimedefaultSymbolTableSize
range(minimumSymbolTableSize, 16777216ul /* 2^24 */)
productEXPERIMENTALshare/runtime/globals.hpp
TLABAllocationWeightJDK6uintxgc35
range(0, 100)
productAllocation averaging weightshare/gc/shared/gc_globals.hpp
TLABRefillWasteFractionJDK6uintxgc64
range(1, max_juint)
productMaximum TLAB waste at a refill (internal fragmentation)share/gc/shared/gc_globals.hpp
TLABSizeJDK6size_tgc0productStarting TLAB size (in bytes); zero means set ergonomicallyshare/gc/shared/gc_globals.hpp
TLABStatsJDK6Deprecated in JDK12boolgctrueproductProvide more detailed and expensive TLAB statistics.share/gc/shared/gc_globals.hpp
TLABWasteIncrementJDK6uintxgc4
range(0, max_jint)
productIncrement allowed waste at slow allocationshare/gc/shared/gc_globals.hpp
TLABWasteTargetPercentJDK6uintxgc1
range(1, 100)
productPercentage of Eden that can be wastedshare/gc/shared/gc_globals.hpp
TargetPLABWastePctJDK6uintxgc10
range(1, 100)
productTarget wasted space in last buffer as percent of overall allocationshare/gc/shared/gc_globals.hpp
TargetSurvivorRatioJDK6uintxgc50
range(0, 100)
productDesired percentage of survivor space used after scavengeshare/gc/shared/gc_globals.hpp
TenuredGenerationSizeIncrementJDK6uintxgc20
range(0, 100)
productAdaptive size percentage change in tenured generationshare/gc/shared/gc_globals.hpp
TenuredGenerationSizeSupplementDecayJDK6uintxgc2
range(1, max_uintx)
productDecay factor to TenuredGenerationSizeIncrementshare/gc/shared/gc_globals.hpp
TenuredGenerationSizeSupplementJDK6uintxgc80
range(0, 100)
productSupplement to TenuredGenerationSizeIncrement used at startupshare/gc/shared/gc_globals.hpp
TestCrashInErrorHandlerJDK9uintxruntime0notproductIf > 0, provokes an error inside VM error handler (a secondary crash). see test_error_handler() in vmError.cppshare/runtime/globals.hpp
TestSafeFetchInErrorHandlerJDK9boolruntimefalsenotproductIf true, tests SafeFetch inside error handler.share/runtime/globals.hpp
TestUnresponsiveErrorHandlerJDK10boolruntimefalsenotproductIf true, simulates an unresponsive error handler.share/runtime/globals.hpp
ThreadPriorityPolicyJDK6intxruntime0
range(0, 1)
product0 : Normal. VM chooses priorities that are appropriate for normal applications. 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/BSD/macOS this policy requires root privilege or an extended capability.
share/runtime/globals.hpp
ThreadPriorityVerboseJDK6boolruntimefalseproductPrint priority changesshare/runtime/globals.hpp
ThreadStackSizeJDK6intxaixppc2048define_pd_global// 0 => use system defaultos_cpu/aix_ppc/globals_aix_ppc.hpp
ThreadStackSizeJDK6intxbsdx86320define_pd_globalos_cpu/bsd_x86/globals_bsd_x86.hpp
ThreadStackSizeJDK6intxbsdzero1536define_pd_globalos_cpu/bsd_zero/globals_bsd_zero.hpp
ThreadStackSizeJDK6intxlinuxaarch642048define_pd_global// 0 => use system defaultos_cpu/linux_aarch64/globals_linux_aarch64.hpp
ThreadStackSizeJDK6intxlinuxarm320define_pd_globalos_cpu/linux_arm/globals_linux_arm.hpp
ThreadStackSizeJDK6intxlinuxppc2048define_pd_global// 0 => use system defaultos_cpu/linux_ppc/globals_linux_ppc.hpp
ThreadStackSizeJDK6intxlinuxs3901024define_pd_global// 0 => Use system default.os_cpu/linux_s390/globals_linux_s390.hpp
ThreadStackSizeJDK6intxlinuxx86320define_pd_globalos_cpu/linux_x86/globals_linux_x86.hpp
ThreadStackSizeJDK6intxlinuxzero1536define_pd_globalos_cpu/linux_zero/globals_linux_zero.hpp
ThreadStackSizeJDK6intxruntimeproduct_pdThread Stack Size (in Kbytes)share/runtime/globals.hpp
ThreadStackSizeJDK6intxwindowsaarch640define_pd_global// 0 => use system defaultos_cpu/windows_aarch64/globals_windows_aarch64.hpp
ThreadStackSizeJDK6intxwindowsx860define_pd_global// 0 => use system defaultos_cpu/windows_x86/globals_windows_x86.hpp
ThresholdToleranceJDK6uintxgc10
range(0, 100)
productAllowed collection cost difference between generationsshare/gc/shared/gc_globals.hpp
Tier0AOTBackEdgeThresholdJDK14intxruntime60000
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier0AOTCompileThresholdJDK14intxruntime2000
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier0AOTInvocationThresholdJDK14intxruntime200
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier0AOTMinInvocationThresholdJDK14intxruntime100
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier0BackedgeNotifyFreqLogJDK6intxruntime10
range(0, 30)
productInterpreter (tier 0) invocation notification frequencyshare/runtime/globals.hpp
Tier0DelayJDK14intxruntime5
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier0InvokeNotifyFreqLogJDK6intxruntime7
range(0, 30)
productInterpreter (tier 0) invocation notification frequencyshare/runtime/globals.hpp
Tier0ProfilingStartPercentageJDK6intxruntime200
range(0, max_jint)
productStart profiling in interpreter if the counters exceed tier 3 thresholds (tier 4 thresholds with CompilationMode=high-only|high-only-quick-internal)by the specified percentageshare/runtime/globals.hpp
Tier23InlineeNotifyFreqLogJDK6intxruntime20
range(0, 30)
productInlinee invocation (tiers 2 and 3) notification frequencyshare/runtime/globals.hpp
Tier2BackEdgeThresholdJDK6intxruntime0
range(0, max_jint)
productBack edge threshold at which tier 2 compilation is invokedshare/runtime/globals.hpp
Tier2BackedgeNotifyFreqLogJDK6intxruntime14
range(0, 30)
productC1 without MDO (tier 2) invocation notification frequencyshare/runtime/globals.hpp
Tier2CompileThresholdJDK6intxruntime0
range(0, max_jint)
productthreshold at which tier 2 compilation is invokedshare/runtime/globals.hpp
Tier2InvokeNotifyFreqLogJDK6intxruntime11
range(0, 30)
productC1 without MDO (tier 2) invocation notification frequencyshare/runtime/globals.hpp
Tier3AOTBackEdgeThresholdJDK9intxruntime120000
range(0, max_jint)
productBack edge threshold at which tier 3 OSR compilation is invoked if coming from AOTshare/runtime/globals.hpp
Tier3AOTCompileThresholdJDK9intxruntime15000
range(0, max_jint)
productThreshold at which tier 3 compilation is invoked (invocation minimum must be satisfied) if coming from AOTshare/runtime/globals.hpp
Tier3AOTInvocationThresholdJDK9intxruntime10000
range(0, max_jint)
productCompile if number of method invocations crosses this threshold if coming from AOTshare/runtime/globals.hpp
Tier3AOTMinInvocationThresholdJDK9intxruntime1000
range(0, max_jint)
productMinimum invocation to compile at tier 3 if coming from AOTshare/runtime/globals.hpp
Tier3BackEdgeThresholdJDK6intxruntime60000
range(0, max_jint)
productBack edge threshold at which tier 3 OSR compilation is invokedshare/runtime/globals.hpp
Tier3BackedgeNotifyFreqLogJDK6intxruntime13
range(0, 30)
productC1 with MDO profiling (tier 3) invocation notification frequencyshare/runtime/globals.hpp
Tier3CompileThresholdJDK6intxruntime2000
range(0, max_jint)
productThreshold at which tier 3 compilation is invoked (invocation minimum must be satisfied)share/runtime/globals.hpp
Tier3DelayOffJDK6intxruntime2
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 3share/runtime/globals.hpp
Tier3DelayOnJDK6intxruntime5
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 2share/runtime/globals.hpp
Tier3InvocationThresholdJDK6intxruntime200
range(0, max_jint)
productCompile if number of method invocations crosses this thresholdshare/runtime/globals.hpp
Tier3InvokeNotifyFreqLogJDK6intxruntime10
range(0, 30)
productC1 with MDO profiling (tier 3) invocation notification frequencyshare/runtime/globals.hpp
Tier3LoadFeedbackJDK6intxruntime5
range(0, max_jint)
productTier 3 thresholds will increase twofold when C1 queue size reaches this amount per compiler threadshare/runtime/globals.hpp
Tier3MinInvocationThresholdJDK6intxruntime100
range(0, max_jint)
productMinimum invocation to compile at tier 3share/runtime/globals.hpp
Tier40BackEdgeThresholdJDK14intxruntime15000
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier40CompileThresholdJDK14intxruntime10000
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier40InvocationThresholdJDK14intxruntime5000
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier40MinInvocationThresholdJDK14intxruntime600
range(0, max_jint)
productDIAGNOSTICshare/runtime/globals.hpp
Tier4BackEdgeThresholdJDK6intxruntime40000
range(0, max_jint)
productBack edge threshold at which tier 4 OSR compilation is invokedshare/runtime/globals.hpp
Tier4CompileThresholdJDK6intxruntime15000
range(0, max_jint)
productThreshold at which tier 4 compilation is invoked (invocation minimum must be satisfied)share/runtime/globals.hpp
Tier4InvocationThresholdJDK6intxruntime5000
range(0, max_jint)
productCompile if number of method invocations crosses this thresholdshare/runtime/globals.hpp
Tier4LoadFeedbackJDK6intxruntime3
range(0, max_jint)
productTier 4 thresholds will increase twofold when C2 queue size reaches this amount per compiler threadshare/runtime/globals.hpp
Tier4MinInvocationThresholdJDK6intxruntime600
range(0, max_jint)
productMinimum invocation to compile at tier 4share/runtime/globals.hpp
TieredCompilationJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
TieredCompilationJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
TieredCompilationJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
TieredCompilationJDK6boolruntimeproduct_pdEnable tiered compilationshare/runtime/globals.hpp
TieredCompilationJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
TieredCompilationJDK6bools390trueInTiereddefine_pd_globalcpu/s390/c2_globals_s390.hpp
TieredCompilationJDK6boolx86falsedefine_pd_globalcpu/x86/c1_globals_x86.hpp
TieredCompileTaskTimeoutJDK6intxruntime50
range(0, max_intx)
productKill compile task if method was not used within given timeout in millisecondsshare/runtime/globals.hpp
TieredRateUpdateMaxTimeJDK6intxruntime25
range(0, max_intx)
productMaximum rate sampling interval (in milliseconds)share/runtime/globals.hpp
TieredRateUpdateMinTimeJDK6intxruntime1
range(0, max_intx)
productMinimum rate sampling interval (in milliseconds)share/runtime/globals.hpp
TieredStopAtLevelJDK6intxruntime4
range(0, 4)
productStop at given compilation levelshare/runtime/globals.hpp
TimeEachLinearScanJDK6boolc1falsedevelopprint detailed timing of each LinearScan runshare/c1/c1_globals.hpp
TimeLinearScanJDK6boolc1falseproductdetailed timing of LinearScan phasesshare/c1/c1_globals.hpp
TimeOopMap2JDK6boolruntimefalsedevelopTime calls to GenerateOopMap::compute_map() individuallyshare/runtime/globals.hpp
TimeOopMapJDK6boolruntimefalsedevelopTime calls to GenerateOopMap::compute_map() in sumshare/runtime/globals.hpp
TraceBytecodesAtJDK6intxruntime0developTrace bytecodes starting with specified bytecode numbershare/runtime/globals.hpp
TraceBytecodesJDK6boolruntimefalsedevelopTrace bytecode executionshare/runtime/globals.hpp
TraceCISCSpillJDK6boolc2falsenotproductTrace allocators use of cisc spillable instructionsshare/opto/c2_globals.hpp
TraceCallFixupJDK6boolruntimefalsedevelopTrace all call fixupsshare/runtime/globals.hpp
TraceCodeBlobStacksJDK6boolruntimefalsenotproductTrace stack-walk of codeblobsshare/runtime/globals.hpp
TraceCompiledICJDK6boolruntimefalsedevelopTrace changes of compiled ICshare/runtime/globals.hpp
TraceCompilerThreadsJDK11boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
TraceCreateZombiesJDK6boolruntimefalsedeveloptrace creation of zombie nmethodsshare/runtime/globals.hpp
TraceDeoptimizationJDK6boolruntimefalsedevelopTrace deoptimizationshare/runtime/globals.hpp
TraceDependenciesJDK6boolruntimefalsedevelopTrace dependenciesshare/runtime/globals.hpp
TraceDerivedPointersJDK6boolruntimefalsedevelopTrace traversal of derived pointers on stackshare/runtime/globals.hpp
TraceFPURegisterUsageJDK6boolc1falsedevelopTrace usage of FPU registers at start of blocks (intel only)share/c1/c1_globals.hpp
TraceFPUStackJDK6boolc1falsedevelopTrace emulation of the FPU stack (intel only)share/c1/c1_globals.hpp
TraceFinalizerRegistrationJDK6boolruntimefalsedevelopTrace registration of final referencesshare/runtime/globals.hpp
TraceFrequencyInliningJDK6boolruntimefalsedevelopTrace frequency based inliningshare/runtime/globals.hpp
TraceICBufferJDK6boolruntimefalsedevelopTrace usage of IC buffershare/runtime/globals.hpp
TraceICsJDK6boolruntimefalsedevelopTrace inline cache changesshare/runtime/globals.hpp
TraceInlineCacheClearingJDK6boolruntimefalsedevelopTrace clearing of inline caches in nmethodsshare/runtime/globals.hpp
TraceInvocationCounterOverflowJDK6boolruntimefalsenotproductTrace method invocation counter overflowshare/runtime/globals.hpp
TraceIterativeGVNJDK6boolc2falsedevelopPrint progress during Iterative Global Value Numberingshare/opto/c2_globals.hpp
TraceJVMTIObjectTaggingJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
TraceJVMTIJDK6ccstrruntimeNULLproductTrace flags for JVMTI functions and eventsshare/runtime/globals.hpp
TraceJavaAssertionsJDK6boolruntimefalsedevelopTrace java language assertionsshare/runtime/globals.hpp
TraceLinearScanLevelJDK6intxc10
range(0, 4)
developDebug levels for the linear scan allocatorshare/c1/c1_globals.hpp
TraceLivenessGenJDK6boolruntimefalsedevelopTrace the generation of liveness analysis informationshare/runtime/globals.hpp
TraceLivenessQueryJDK6boolruntimefalsenotproductTrace queries of liveness analysis informationshare/runtime/globals.hpp
TraceLoopLimitCheckJDK6boolc2falsedevelopTrace generation of loop limits checksshare/opto/c2_globals.hpp
TraceLoopOptsJDK6boolc2falsedevelopTrace executed loop optimizationsshare/opto/c2_globals.hpp
TraceLoopPredicateJDK6boolc2falsedevelopTrace generation of loop predicatesshare/opto/c2_globals.hpp
TraceLoopUnswitchingJDK6boolc2falsenotproductTrace loop unswitchingshare/opto/c2_globals.hpp
TraceMemoryWritebackJDK14boolruntimefalsedevelopTrace memory writeback operationsshare/runtime/globals.hpp
TraceMethodReplacementJDK6boolruntimefalsedevelopPrint when methods are replaced do to recompilationshare/runtime/globals.hpp
TraceNewOopMapGenerationDetailedJDK6boolruntimefalsedevelopTrace OopMapGeneration: print detailed cell statesshare/runtime/globals.hpp
TraceNewOopMapGenerationJDK6boolruntimefalsedevelopTrace OopMapGenerationshare/runtime/globals.hpp
TraceNewVectorsJDK7boolc2falsenotproductTrace creation of Vector nodesshare/opto/c2_globals.hpp
TraceOnStackReplacementJDK6boolruntimefalsenotproductTrace on stack replacementshare/runtime/globals.hpp
TraceOopMapRewritesJDK6boolruntimefalsedevelopTrace rewriting of methods during oop map generationshare/runtime/globals.hpp
TraceOptimizeFillJDK6boolc2falsedevelopprint detailed information about fill conversionshare/opto/c2_globals.hpp
TraceOptoOutputJDK6boolc2falsenotproductTrace pipelining informationshare/opto/c2_globals.hpp
TraceOptoParseJDK6boolc2falsedevelopTrace bytecode parse and control-flow mergeshare/opto/c2_globals.hpp
TraceOptoPipeliningJDK6boolc2falsenotproductTrace pipelining informationshare/opto/c2_globals.hpp
TracePartialPeelingJDK6boolc2falsenotproductTrace partial peeling (loop rotation) informationshare/opto/c2_globals.hpp
TracePatchingJDK6boolc1falsedevelopTrace patching of field access on uninitialized classesshare/c1/c1_globals.hpp
TracePcPatchingJDK6boolruntimefalsedevelopTrace usage of frame::patch_pcshare/runtime/globals.hpp
TracePhaseCCPJDK6boolc2falsenotproductPrint progress during Conditional Constant Propagationshare/opto/c2_globals.hpp
TracePostallocExpandJDK8boolc2falsedevelopTrace expanding nodes after register allocation.share/opto/c2_globals.hpp
TracePredicateFailedTrapsJDK8boolc1falsedeveloptrace runtime traps caused by predicate failureshare/c1/c1_globals.hpp
TraceProfileTripCountJDK6boolc2falsenotproductTrace profile loop trip count informationshare/opto/c2_globals.hpp
TraceRangeCheckEliminationJDK8boolc1falsedevelopTrace Range Check Eliminationshare/c1/c1_globals.hpp
TraceRangeLimitCheckJDK6boolc2falsedevelopTrace additional overflow checks in RCEshare/opto/c2_globals.hpp
TraceRelocatorJDK6boolruntimefalsedevelopTrace the bytecode relocatorshare/runtime/globals.hpp
TraceSpillingJDK6boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
TraceSuperWordLoopUnrollAnalysisJDK9boolc2falsenotproductTrace what Superword Level Parallelism analysis appliesshare/opto/c2_globals.hpp
TraceSuperWordJDK6boolc2falsenotproductTrace superword transformsshare/opto/c2_globals.hpp
TraceSuspendWaitFailuresJDK6boolruntimefalseproductTrace external suspend wait failuresshare/runtime/globals.hpp
TraceTrapsJDK7boolaarch64falseproductTrace all traps the signal handlercpu/aarch64/globals_aarch64.hpp
TraceTrapsJDK7boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
TraceTrapsJDK7bools390falseproductDIAGNOSTICcpu/s390/globals_s390.hpp
TraceTypeProfileJDK6boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
TrackedInitializationLimitJDK6intxc250
range(0, 65535)
productWhen initializing fields, track up to this many wordsshare/opto/c2_globals.hpp
TrapBasedICMissChecksJDK7boolppctrueproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
TrapBasedNullChecksJDK7boolaarch64falsedefine_pd_globalcpu/aarch64/globals_aarch64.hpp
TrapBasedNullChecksJDK7boolarmfalsedefine_pd_global// Not neededcpu/arm/globals_arm.hpp
TrapBasedNullChecksJDK7boolruntimeproduct_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).share/runtime/globals.hpp
TrapBasedNullChecksJDK7boolppctruedefine_pd_globalcpu/ppc/globals_ppc.hpp
TrapBasedNullChecksJDK7bools390truedefine_pd_globalcpu/s390/globals_s390.hpp
TrapBasedNullChecksJDK7boolx86falsedefine_pd_global// Not needed on x86.cpu/x86/globals_x86.hpp
TrapBasedNullChecksJDK7boolzerofalsedefine_pd_globalcpu/zero/globals_zero.hpp
TrapBasedRangeChecksJDK7boolaarch64falsedefine_pd_global// Not needed.cpu/aarch64/c2_globals_aarch64.hpp
TrapBasedRangeChecksJDK7boolarmfalsedefine_pd_global// Not neededcpu/arm/c2_globals_arm.hpp
TrapBasedRangeChecksJDK7boolc2product_pdGenerate code for range checks that uses a cmp and trap instruction raising SIGTRAP. Used on PPC64.share/opto/c2_globals.hpp
TrapBasedRangeChecksJDK7boolppctruedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
TrapBasedRangeChecksJDK7bools390falsedefine_pd_global// Not needed on z/Architecture.cpu/s390/c2_globals_s390.hpp
TrapBasedRangeChecksJDK7boolx86falsedefine_pd_global// Not needed on x86.cpu/x86/c2_globals_x86.hpp
TrustFinalNonStaticFieldsJDK6boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
TwoOperandLIRFormJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
TwoOperandLIRFormJDK6boolarmfalsedefine_pd_globalcpu/arm/c1_globals_arm.hpp
TwoOperandLIRFormJDK6boolc1develop_pdtrue if LIR requires src1 and dst to match in binary LIR opsshare/c1/c1_globals.hpp
TwoOperandLIRFormJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
TwoOperandLIRFormJDK6bools390truedefine_pd_globalcpu/s390/c1_globals_s390.hpp
TwoOperandLIRFormJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
TypeProfileArgsLimitJDK8intxruntime2
range(0, 16)
productmax number of call arguments to consider for type profilingshare/runtime/globals.hpp
TypeProfileCastsJDK6boolruntimetruedeveloptreat casts like calls for purposes of type profilingshare/runtime/globals.hpp
TypeProfileLevelJDK8uintxaarch64111define_pd_globalcpu/aarch64/globals_aarch64.hpp
TypeProfileLevelJDK8uintxarm0define_pd_globalcpu/arm/globals_arm.hpp
TypeProfileLevelJDK8uintxruntimeproduct_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 methodsshare/runtime/globals.hpp
TypeProfileLevelJDK8uintxppc111define_pd_globalcpu/ppc/globals_ppc.hpp
TypeProfileLevelJDK8uintxs390111define_pd_globalcpu/s390/globals_s390.hpp
TypeProfileLevelJDK8uintxx86111define_pd_globalcpu/x86/globals_x86.hpp
TypeProfileLevelJDK8uintxzero0define_pd_globalcpu/zero/globals_zero.hpp
TypeProfileMajorReceiverPercentJDK6intxc290
range(0, 100)
product% of major receiver type to all profiled receiversshare/opto/c2_globals.hpp
TypeProfileParmsLimitJDK8intxruntime2
range(-1, 64)
productmax number of incoming parameters to consider for type profiling, -1 for allshare/runtime/globals.hpp
TypeProfileWidthJDK6intxruntime2
range(0, 8)
productNumber of receiver types to record in call/cast profileshare/runtime/globals.hpp
UncommonNullCastJDK6boolaarch64truedefine_pd_global// Uncommon-trap NULLs past to check castcpu/aarch64/globals_aarch64.hpp
UncommonNullCastJDK6boolarmtruedefine_pd_global// Uncommon-trap NULLs past to check castcpu/arm/globals_arm.hpp
UncommonNullCastJDK6boolruntimedevelop_pdtrack occurrences of null in casts; adjust compiler tacticsshare/runtime/globals.hpp
UncommonNullCastJDK6boolppctruedefine_pd_global// Uncommon-trap NULLs passed to check cast.cpu/ppc/globals_ppc.hpp
UncommonNullCastJDK6bools390truedefine_pd_global// Uncommon-trap NULLs passed to check cast.cpu/s390/globals_s390.hpp
UncommonNullCastJDK6boolx86truedefine_pd_global// Uncommon-trap NULLs passed to check castcpu/x86/globals_x86.hpp
UncommonNullCastJDK6boolzerotruedefine_pd_globalcpu/zero/globals_zero.hpp
UnguardOnExecutionViolationJDK6intxruntime0
range(0, 2)
productUnguard page and retry on no-execute fault (Win32 only)
0=off, 1=conservative, 2=aggressive
share/runtime/globals.hpp
UnlockDiagnosticVMOptionsJDK6boolruntimetrueInDebugproductDIAGNOSTICshare/runtime/globals.hpp
UnlockExperimentalVMOptionsJDK6boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
UnrollLimitForProfileCheckJDK6intxc21
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.share/opto/c2_globals.hpp
Use64KPagesThresholdJDK9uintxaix0develop4K/64K page allocation threshold.os/aix/globals_aix.hpp
Use64KPagesJDK9boolaixtrueproductUse 64K pages if available.os/aix/globals_aix.hpp
UseAESCTRIntrinsicsJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseAESIntrinsicsJDK7boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseAESJDK7boolruntimefalseproductControl whether AES instructions are used when availableshare/runtime/globals.hpp
UseAOTStrictLoadingJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseAOTJDK9boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
UseAVXJDK6intxx863
range(0, 99)
productHighest supported AVX instructions set on x86/x64cpu/x86/globals_x86.hpp
UseAdaptiveGenerationSizePolicyAtMajorCollectionJDK6boolgctrueproductUse adaptive young-old sizing policies at major collectionsshare/gc/shared/gc_globals.hpp
UseAdaptiveGenerationSizePolicyAtMinorCollectionJDK6boolgctrueproductUse adaptive young-old sizing policies at minor collectionsshare/gc/shared/gc_globals.hpp
UseAdaptiveNUMAChunkSizingJDK6boolruntimetrueproductEnable adaptive chunk sizing for NUMAshare/runtime/globals.hpp
UseAdaptiveSizeDecayMajorGCCostJDK6boolgctrueproductAdaptive size decays the major cost for long major intervalsshare/gc/shared/gc_globals.hpp
UseAdaptiveSizePolicyFootprintGoalJDK6boolgctrueproductUse adaptive minimum footprint as a goalshare/gc/shared/gc_globals.hpp
UseAdaptiveSizePolicyWithSystemGCJDK6boolgcfalseproductInclude statistics from System.gc() for adaptive size policyshare/gc/shared/gc_globals.hpp
UseAdaptiveSizePolicyJDK6boolgctrueproductUse adaptive generation sizing policiesshare/gc/shared/gc_globals.hpp
UseAddressNopJDK6boolx86falseproductUse '0F 1F [addr]' NOP instructions on x86 cpuscpu/x86/globals_x86.hpp
UseAdler32IntrinsicsJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseBASE64IntrinsicsJDK11boolruntimefalseproductUse intrinsics for java.util.Base64share/runtime/globals.hpp
UseBMI1InstructionsJDK8boolx86falseproductUse BMI1 instructionscpu/x86/globals_x86.hpp
UseBMI2InstructionsJDK8boolx86falseproductUse BMI2 instructionscpu/x86/globals_x86.hpp
UseBiasedLockingJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproduct(Deprecated) Enable biased locking in JVMshare/runtime/globals.hpp
UseBimorphicInliningJDK6boolc2trueproductProfiling based inlining for two receiversshare/opto/c2_globals.hpp
UseBlockZeroingJDK6boolaarch64trueproductUse DC ZVA for block zeroingcpu/aarch64/globals_aarch64.hpp
UseBootstrapCallInfoJDK11intruntime1productDIAGNOSTICshare/runtime/globals.hpp
UseByteReverseInstructionJDK9bools390trueproductDIAGNOSTICcpu/s390/globals_s390.hpp
UseByteReverseInstructionsJDK16boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseC1OptimizationsJDK6boolc1truedevelopTurn on C1 optimizationsshare/c1/c1_globals.hpp
UseCHAJDK6boolruntimetruedevelopEnable CHAshare/runtime/globals.hpp
UseCISCSpillJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c2_globals_aarch64.hpp
UseCISCSpillJDK6boolarmfalsedefine_pd_globalcpu/arm/c2_globals_arm.hpp
UseCISCSpillJDK6boolc2develop_pdUse ADLC supplied cisc instructions during allocationshare/opto/c2_globals.hpp
UseCISCSpillJDK6boolppcfalsedefine_pd_globalcpu/ppc/c2_globals_ppc.hpp
UseCISCSpillJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
UseCISCSpillJDK6boolx86truedefine_pd_globalcpu/x86/c2_globals_x86.hpp
UseCLMULJDK8boolx86falseproductControl whether CLMUL instructions can be used on x86/x64cpu/x86/globals_x86.hpp
UseCMoveUnconditionallyJDK9boolc2falseproductUse CMove (scalar and vector) ignoring profitability test.share/opto/c2_globals.hpp
UseCRC32CIntrinsicsJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseCRC32IntrinsicsJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseCRC32JDK9boolaarch64falseproductUse CRC32 instructions for CRC32 computationcpu/aarch64/globals_aarch64.hpp
UseCharacterCompareIntrinsicsJDK11boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
UseCodeAgingJDK9boolruntimetrueproductInsert counter to detect warm methodsshare/runtime/globals.hpp
UseCodeCacheFlushingJDK6boolruntimetrueproductRemove cold/old nmethods from the code cacheshare/runtime/globals.hpp
UseCompilerJDK6boolruntimetrueproductUse Just-In-Time compilationshare/runtime/globals.hpp
UseCompressedClassPointersJDK8boolruntimefalseproductUse 32-bit class pointers in 64-bit VM. lp64_product means flag is always constant in 32 bit VMshare/runtime/globals.hpp
UseCompressedOopsJDK6boolruntimefalseproductUse 32-bit object references in 64-bit VM. lp64_product means flag is always constant in 32 bit VMshare/runtime/globals.hpp
UseCondCardMarkJDK6boolgcfalseproductCheck for already marked card before updating card tableshare/gc/shared/gc_globals.hpp
UseContainerSupportJDK10boollinuxtrueproductEnable detection and runtime container configuration supportos/linux/globals_linux.hpp
UseCopySignIntrinsicJDK16boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseCountLeadingZerosInstructionJDK6boolx86falseproductUse count leading zeros instructioncpu/x86/globals_x86.hpp
UseCountLeadingZerosInstructionsPPC64JDK7boolppctrueproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseCountTrailingZerosInstructionJDK8boolx86falseproductUse count trailing zeros instructioncpu/x86/globals_x86.hpp
UseCountTrailingZerosInstructionsPPC64JDK11boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseCountedLoopSafepointsJDK7boolc2falseproductForce counted loops to keep a safepointshare/opto/c2_globals.hpp
UseCounterDecayJDK6boolruntimetrueproductAdjust recompilation countersshare/runtime/globals.hpp
UseCpuAllocPathJDK9boollinuxfalseproductDIAGNOSTICos/linux/globals_linux.hpp
UseCriticalCompilerThreadPriorityJDK6boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
UseCriticalJavaThreadPriorityJDK6boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
UseDivModJDK6boolc2trueproductUse combined DivMod instruction if availableshare/opto/c2_globals.hpp
UseDynamicNumberOfCompilerThreadsJDK11boolruntimetrueproductDynamically choose the number of parallel compiler threadsshare/runtime/globals.hpp
UseDynamicNumberOfGCThreadsJDK6boolgctrueproductDynamically choose the number of threads up to a maximum of ParallelGCThreads parallel collectors will use for garbage collection workshare/gc/shared/gc_globals.hpp
UseEmptySlotsInSupersJDK15boolruntimetrueproductAllow allocating fields in empty slots of super-classesshare/runtime/globals.hpp
UseEpsilonGCJDK11boolgcfalseproductEXPERIMENTALshare/gc/shared/gc_globals.hpp
UseExplicitCommitJDK9boolaixfalseproductExplicit commit for virtual memory.os/aix/globals_aix.hpp
UseExtendedLoadAndReserveInstructionsPPC64JDK7boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseFMAJDK9boolruntimefalseproductControl whether FMA instructions are used when availableshare/runtime/globals.hpp
UseFPUForSpillingJDK6boolc2falseproductSpill integer registers to FPU instead of stack when possibleshare/opto/c2_globals.hpp
UseFastAccessorMethodsJDK6boolzerotrueproductUse fast method entry code for accessor methodscpu/zero/globals_zero.hpp
UseFastEmptyMethodsJDK6boolzerotrueproductUse fast method entry code for empty methodscpu/zero/globals_zero.hpp
UseFastJNIAccessorsJDK6boolruntimetrueproductUse optimized versions of Get<Primitive>Fieldshare/runtime/globals.hpp
UseFastLockingJDK6boolc1truedevelopUse fast inlined locking codeshare/c1/c1_globals.hpp
UseFastNewInstanceJDK6boolc1truedevelopUse fast inlined instance allocationshare/c1/c1_globals.hpp
UseFastNewObjectArrayJDK6boolc1truedevelopUse fast inlined object array allocationshare/c1/c1_globals.hpp
UseFastNewTypeArrayJDK6boolc1truedevelopUse fast inlined type array allocationshare/c1/c1_globals.hpp
UseFastSignatureHandlersJDK6boolruntimetruedevelopUse fast signature handlers for native callsshare/runtime/globals.hpp
UseFastStosbJDK7boolx86falseproductUse fast-string operation for zeroing: rep stosbcpu/x86/globals_x86.hpp
UseFastUnorderedTimeStampsJDK11boolruntimefalseproductEXPERIMENTALshare/runtime/globals.hpp
UseG1GCJDK6boolgcfalseproductUse the Garbage-First garbage collectorshare/gc/shared/gc_globals.hpp
UseGCOverheadLimitJDK6boolgctrueproductUse policy to limit of proportion of time spent in GC before an OutOfMemory error is thrownshare/gc/shared/gc_globals.hpp
UseGHASHIntrinsicsJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseGlobalValueNumberingJDK6boolc1truedevelopUse Global Value Numbering (separate phase)share/c1/c1_globals.hpp
UseHeavyMonitorsJDK6boolruntimefalseproductuse heavyweight instead of lightweight Java monitorsshare/runtime/globals.hpp
UseHugeTLBFSJDK6Obsoleted in JDK12
Expired in JDK13
boollinuxfalseproductUse MAP_HUGETLB for large pagesos/linux/globals_linux.hpp
UseIncDecJDK6boolx86trueproductDIAGNOSTICcpu/x86/globals_x86.hpp
UseInlineCachesJDK6boolruntimetrueproductUse Inline Caches for virtual callsshare/runtime/globals.hpp
UseInlineDepthForSpeculativeTypesJDK8boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
UseInterpreterJDK6boolruntimetrueproductUse interpreter for non-compiled methodsshare/runtime/globals.hpp
UseJVMCICompilerJDK9booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
UseJVMCINativeLibraryJDK13booljvmcifalseproductEXPERIMENTALshare/jvmci/jvmci_globals.hpp
UseJumpTablesJDK6boolc2trueproductUse JumpTables instead of a binary search tree for switchesshare/opto/c2_globals.hpp
UseLSEJDK9boolaarch64falseproductUse LSE instructionscpu/aarch64/globals_aarch64.hpp
UseLargePagesInMetaspaceJDK8Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolruntimefalseproduct(Deprecated) Use large page memory in metaspace. Only used if UseLargePages is enabled.share/runtime/globals.hpp
UseLargePagesIndividualAllocationJDK6boolaixfalsedefine_pd_globalos/aix/globals_aix.hpp
UseLargePagesIndividualAllocationJDK6boolbsdfalsedefine_pd_globalos/bsd/globals_bsd.hpp
UseLargePagesIndividualAllocationJDK6boollinuxfalsedefine_pd_globalos/linux/globals_linux.hpp
UseLargePagesIndividualAllocationJDK6boolruntimeproduct_pdAllocate large pages individually for better affinityshare/runtime/globals.hpp
UseLargePagesIndividualAllocationJDK6boolwindowstruedefine_pd_globalos/windows/globals_windows.hpp
UseLargePagesJDK6boolaixfalsedefine_pd_globalos/aix/globals_aix.hpp
UseLargePagesJDK6boolbsdfalsedefine_pd_globalos/bsd/globals_bsd.hpp
UseLargePagesJDK6boollinuxfalsedefine_pd_globalos/linux/globals_linux.hpp
UseLargePagesJDK6boolruntimeproduct_pdUse large page memoryshare/runtime/globals.hpp
UseLargePagesJDK6boolwindowsfalsedefine_pd_globalos/windows/globals_windows.hpp
UseLibmIntrinsicJDK9boolx86trueproductDIAGNOSTICcpu/x86/globals_x86.hpp
UseLinuxPosixThreadCPUClocksJDK6boollinuxtrueproductenable fast Linux Posix clocks where availableos/linux/globals_linux.hpp
UseLoadInstructionsForStackBangingPPC64JDK7boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseLocalValueNumberingJDK6boolc1truedevelopUse Local Value Numbering (embedded in GraphBuilder)share/c1/c1_globals.hpp
UseLoopCounterJDK6boolruntimetrueproductIncrement invocation counter on backward branchshare/runtime/globals.hpp
UseLoopInvariantCodeMotionJDK8boolc1trueproductSimple loop invariant code motion for short loops during GVNshare/c1/c1_globals.hpp
UseLoopPredicateJDK6boolc2trueproductGenerate a predicate to select fast/slow loop versionsshare/opto/c2_globals.hpp
UseLoopSafepointsJDK6boolruntimetruedevelopGenerate Safepoint nodes in every loopshare/runtime/globals.hpp
UseMD5IntrinsicsJDK16boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseMallocOnlyJDK6boolruntimefalsedevelopUse only malloc/free for allocation (no resource area/arena)share/runtime/globals.hpp
UseMathExactIntrinsicsJDK8boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
UseMaximumCompactionOnSystemGCJDK6boolgctrueproductUse maximum compaction in the Parallel Old garbage collector for a system GCshare/gc/parallel/parallel_globals.hpp
UseMontgomeryMultiplyIntrinsicJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
UseMontgomerySquareIntrinsicJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
UseMulAddIntrinsicJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
UseMultiplyToLenIntrinsicJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
UseNUMAInterleavingJDK6boolruntimefalseproductInterleave memory across NUMA nodes if availableshare/runtime/globals.hpp
UseNUMAJDK6boolruntimefalseproductUse NUMA if availableshare/runtime/globals.hpp
UseNeonJDK9boolaarch64falseproductUse Neon for CRC32 computationcpu/aarch64/globals_aarch64.hpp
UseNewCode2JDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseNewCode3JDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseNewCodeJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseNewLongLShiftJDK6boolx86falseproductUse optimized bitwise shift leftcpu/x86/globals_x86.hpp
UseNotificationThreadJDK14boolruntimetrueproductUse Notification Threadshare/runtime/globals.hpp
UseOSErrorReportingJDK6boolaixfalsedefine_pd_globalos/aix/globals_aix.hpp
UseOSErrorReportingJDK6boolbsdfalsedefine_pd_globalos/bsd/globals_bsd.hpp
UseOSErrorReportingJDK6boollinuxfalsedefine_pd_globalos/linux/globals_linux.hpp
UseOSErrorReportingJDK6boolruntimeproduct_pdLet VM fatal error propagate to the OS (ie. WER on Windows)share/runtime/globals.hpp
UseOSErrorReportingJDK6boolwindowsfalsedefine_pd_global// for now.os/windows/globals_windows.hpp
UseOnStackReplacementJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
UseOnStackReplacementJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
UseOnStackReplacementJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
UseOnStackReplacementJDK6boolruntimeproduct_pdUse on stack replacement, calls runtime if invoc. counter overflows in loopshare/runtime/globals.hpp
UseOnStackReplacementJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
UseOnStackReplacementJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
UseOnStackReplacementJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
UseOnlyInlinedBimorphicJDK6boolc2trueproductDon't use BimorphicInlining if can't inline a second methodshare/opto/c2_globals.hpp
UseOprofileJDK6Obsoleted in JDK16
Expired in JDK17
boollinuxfalseproductenable support for Oprofile profileros/linux/globals_linux.hpp
UseOptoBiasInliningJDK6Deprecated in JDK15
Obsoleted in JDK16
Expired in JDK17
boolc2trueproduct(Deprecated) Generate biased locking code in C2 ideal graphshare/opto/c2_globals.hpp
UsePSAdaptiveSurvivorSizePolicyJDK6boolgctrueproductUse adaptive survivor sizing policiesshare/gc/shared/gc_globals.hpp
UseParallelGCJDK6boolgcfalseproductUse the Parallel garbage collector.share/gc/shared/gc_globals.hpp
UsePerfDataJDK6boolruntimetrueproductFlag to disable jvmstat instrumentation for performance testing and problem isolation purposesshare/runtime/globals.hpp
UsePopCountInstructionJDK6boolruntimefalseproductUse population count instructionshare/runtime/globals.hpp
UsePrivilegedStackJDK6boolruntimetruedevelopEnable the security JVM functionsshare/runtime/globals.hpp
UseProfiledLoopPredicateJDK11boolc2trueproductMove predicates out of loops based on profiling datashare/opto/c2_globals.hpp
UseRDPCForConstantTableBaseJDK6boolc2falseproductUse Sparc RDPC instruction for the constant table base.share/opto/c2_globals.hpp
UseRTMDeoptJDK8boolppcfalseproductPerform deopt and recompilation based on RTM abort ratiocpu/ppc/globals_ppc.hpp
UseRTMDeoptJDK8boolx86falseproductPerform deopt and recompilation based on RTM abort ratiocpu/x86/globals_x86.hpp
UseRTMForStackLocksJDK8boolppcfalseproductEXPERIMENTALcpu/ppc/globals_ppc.hpp
UseRTMForStackLocksJDK8boolx86falseproductEXPERIMENTALcpu/x86/globals_x86.hpp
UseRTMLockingJDK8boolppcfalseproductEnable RTM lock eliding for inflated locks in compiled codecpu/ppc/globals_ppc.hpp
UseRTMLockingJDK8boolx86falseproductEnable RTM lock eliding for inflated locks in compiled codecpu/x86/globals_x86.hpp
UseRTMXendForLockBusyJDK8boolppctrueproductEXPERIMENTALcpu/ppc/globals_ppc.hpp
UseRTMXendForLockBusyJDK8boolx86trueproductEXPERIMENTALcpu/x86/globals_x86.hpp
UseRotateAndMaskInstructionsPPC64JDK7boolppctrueproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseSHA1IntrinsicsJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseSHA256IntrinsicsJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseSHA512IntrinsicsJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseSHAJDK8boolruntimefalseproductControl whether SHA instructions are used when availableshare/runtime/globals.hpp
UseSHMJDK6Obsoleted in JDK12
Expired in JDK13
boollinuxfalseproductUse SYSV shared memory for large pagesos/linux/globals_linux.hpp
UseSIGTRAPJDK7boolppctrueproductAllow trap instructions that make use of SIGTRAP. Use this to switch off all optimizations requiring SIGTRAP.cpu/ppc/globals_ppc.hpp
UseSIMDForArrayEqualsJDK11boolaarch64trueproductUse SIMD instructions in generated array equals codecpu/aarch64/globals_aarch64.hpp
UseSIMDForMemoryOpsJDK9boolaarch64falseproductUse SIMD instructions in generated memory move codecpu/aarch64/globals_aarch64.hpp
UseSSE42IntrinsicsJDK6boolx86falseproductSSE4.2 versions of intrinsicscpu/x86/globals_x86.hpp
UseSSEJDK6Obsoleted in JDK15
Expired in JDK16
intxx8699
range(0, 99)
productHighest supported SSE instructions set on x86/x64cpu/x86/globals_x86.hpp
UseSVEJDK16uintaarch640
range(0, 2)
productHighest supported SVE instruction set versioncpu/aarch64/globals_aarch64.hpp
UseSerialGCJDK6boolgcfalseproductUse the Serial garbage collectorshare/gc/shared/gc_globals.hpp
UseSharedSpacesJDK6boolruntimetrueproductUse shared spaces for metadatashare/runtime/globals.hpp
UseShenandoahGCJDK12boolgcfalseproductUse the Shenandoah garbage collectorshare/gc/shared/gc_globals.hpp
UseSignalChainingJDK6boolruntimetrueproductUse signal-chaining to invoke signal handlers installed by the application (Unix only)share/runtime/globals.hpp
UseSignumIntrinsicJDK16boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseSimpleArrayEqualsJDK11boolaarch64falseproductUse simpliest and shortest implementation for array equalscpu/aarch64/globals_aarch64.hpp
UseSlowPathJDK6boolc1falsedevelopFor debugging: test slow cases by always using themshare/c1/c1_globals.hpp
UseSquareToLenIntrinsicJDK8boolc2falseproductDIAGNOSTICshare/opto/c2_globals.hpp
UseStackBangingJDK6boolruntimetruedevelopuse stack banging for stack overflow checks (required for proper StackOverflow handling; disable only to measure cost of stackbanging)share/runtime/globals.hpp
UseStaticBranchPredictionForUncommonPathsPPC64JDK7boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseStaticBranchPredictionInCompareAndSwapPPC64JDK7boolppctrueproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseStoreImmI16JDK6boolx86trueproductUse store immediate 16-bits value instruction on x86cpu/x86/globals_x86.hpp
UseStringDeduplicationJDK8boolruntimefalseproductUse string deduplicationshare/runtime/globals.hpp
UseSubwordForMaxVectorJDK10boolc2trueproductUse Subword Analysis to set maximum vector sizeshare/opto/c2_globals.hpp
UseSuperWordJDK6boolc2trueproductTransform scalar operations into superword operationsshare/opto/c2_globals.hpp
UseSwitchProfilingJDK11boolruntimetrueproductDIAGNOSTICshare/runtime/globals.hpp
UseTLABJDK6boolaarch64truedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
UseTLABJDK6boolarmtruedefine_pd_globalcpu/arm/c2_globals_arm.hpp
UseTLABJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
UseTLABJDK6boolgcproduct_pdUse thread-local object allocationshare/gc/shared/gc_globals.hpp
UseTLABJDK6boolppctruedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
UseTLABJDK6bools390truedefine_pd_globalcpu/s390/c2_globals_s390.hpp
UseTLABJDK6boolx86truedefine_pd_globalcpu/x86/c1_globals_x86.hpp
UseTableRangesJDK6boolc1truedevelopFaster versions of lookup table using rangesshare/c1/c1_globals.hpp
UseThreadPrioritiesJDK6boolruntimeproduct_pdUse native thread prioritiesshare/runtime/globals.hpp
UseTransparentHugePagesJDK7boollinuxfalseproductUse MADV_HUGEPAGE for large pagesos/linux/globals_linux.hpp
UseTypeProfileJDK6boolaarch64falsedefine_pd_globalcpu/aarch64/c1_globals_aarch64.hpp
UseTypeProfileJDK6boolarmfalsedefine_pd_globalcpu/arm/c1_globals_arm.hpp
UseTypeProfileJDK6boolcompilerfalsedefine_pd_globalshare/compiler/compiler_globals.hpp
UseTypeProfileJDK6boolruntimetrueproductCheck interpreter profile for historically monomorphic callsshare/runtime/globals.hpp
UseTypeProfileJDK6boolppcfalsedefine_pd_globalcpu/ppc/c1_globals_ppc.hpp
UseTypeProfileJDK6bools390falsedefine_pd_globalcpu/s390/c1_globals_s390.hpp
UseTypeProfileJDK6boolx86falsedefine_pd_globalcpu/x86/c1_globals_x86.hpp
UseTypeSpeculationJDK8boolc2trueproductSpeculatively propagate types from profilesshare/opto/c2_globals.hpp
UseUnalignedAccessesJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseUnalignedLoadStoresJDK6boolx86falseproductUse SSE2 MOVDQU instruction for Arraycopycpu/x86/globals_x86.hpp
UseUniqueSubclassesJDK6boolc2truedevelopNarrow an abstract reference to the unique concrete subclassshare/opto/c2_globals.hpp
UseVectorByteReverseInstructionsPPC64JDK15boolppcfalseproductDIAGNOSTICcpu/ppc/globals_ppc.hpp
UseVectorCmovJDK10boolc2falseproductUse Vectorized Cmovshare/opto/c2_globals.hpp
UseVectorMacroLogicJDK15boolc2trueproductDIAGNOSTICshare/opto/c2_globals.hpp
UseVectorizedMismatchIntrinsicJDK9boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
UseXMMForArrayCopyJDK6boolruntimefalseproductUse SSE2 MOVQ instruction for Arraycopyshare/runtime/globals.hpp
UseXMMForObjInitJDK11boolx86falseproductUse XMM/YMM MOVDQU instruction for Object Initializationcpu/x86/globals_x86.hpp
UseXmmI2DJDK6boolx86falseproductUse SSE2 CVTDQ2PD instruction to convert Integer to Doublecpu/x86/globals_x86.hpp
UseXmmI2FJDK6boolx86falseproductUse SSE2 CVTDQ2PS instruction to convert Integer to Floatcpu/x86/globals_x86.hpp
UseXmmLoadAndClearUpperJDK6boolx86trueproductLoad low part of XMM register and clear upper partcpu/x86/globals_x86.hpp
UseXmmRegToRegMoveAllJDK6boolx86falseproductCopy all XMM register bits when moving value between registerscpu/x86/globals_x86.hpp
UseZGCJDK11boolgcfalseproductUse the Z garbage collectorshare/gc/shared/gc_globals.hpp
VMThreadPriorityJDK6intxruntime-1
range(-1, 127)
productThe native priority at which the VM thread should run (-1 means no change)share/runtime/globals.hpp
VMThreadStackSizeJDK6intxaixppc2048define_pd_globalos_cpu/aix_ppc/globals_aix_ppc.hpp
VMThreadStackSizeJDK6intxbsdx86512define_pd_globalos_cpu/bsd_x86/globals_bsd_x86.hpp
VMThreadStackSizeJDK6intxbsdzero512define_pd_globalos_cpu/bsd_zero/globals_bsd_zero.hpp
VMThreadStackSizeJDK6intxlinuxaarch642048define_pd_globalos_cpu/linux_aarch64/globals_linux_aarch64.hpp
VMThreadStackSizeJDK6intxlinuxarm512define_pd_globalos_cpu/linux_arm/globals_linux_arm.hpp
VMThreadStackSizeJDK6intxlinuxppc2048define_pd_globalos_cpu/linux_ppc/globals_linux_ppc.hpp
VMThreadStackSizeJDK6intxlinuxs3901024define_pd_globalos_cpu/linux_s390/globals_linux_s390.hpp
VMThreadStackSizeJDK6intxlinuxx86512define_pd_globalos_cpu/linux_x86/globals_linux_x86.hpp
VMThreadStackSizeJDK6intxlinuxzero512define_pd_globalos_cpu/linux_zero/globals_linux_zero.hpp
VMThreadStackSizeJDK6intxruntimeproduct_pdNon-Java Thread Stack Size (in Kbytes)share/runtime/globals.hpp
VMThreadStackSizeJDK6intxwindowsaarch640define_pd_globalos_cpu/windows_aarch64/globals_windows_aarch64.hpp
VMThreadStackSizeJDK6intxwindowsx860define_pd_global// 0 => use system defaultos_cpu/windows_x86/globals_windows_x86.hpp
ValueMapInitialSizeJDK6intxc111
range(1, NOT_LP64(1*K) LP64_ONLY(32*K))
productInitial size of a value mapshare/c1/c1_globals.hpp
ValueMapMaxLoopSizeJDK6intxc18
range(0, 128)
productmaximum size of a loop optimized by global value numberingshare/c1/c1_globals.hpp
ValueSearchLimitJDK6intxc21000
range(0, max_jint)
productRecursion limit in PhaseMacroExpand::value_from_mem_phishare/opto/c2_globals.hpp
VerboseJDK6boolruntimefalsedevelopPrint additional debugging information from other modesshare/runtime/globals.hpp
VerifyActivationFrameSizeJDK6boolruntimefalsedevelopVerify that activation frame didn't become smaller than its minimal sizeshare/runtime/globals.hpp
VerifyAdapterCallsJDK7boolruntimetrueInDebugproductDIAGNOSTICshare/runtime/globals.hpp
VerifyAdapterSharingJDK6boolruntimefalsedevelopVerify that the code for shared adapters is the equivalentshare/runtime/globals.hpp
VerifyAfterGCJDK6boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyAliasesJDK6boolc2falsedevelopperform extra checks on the results of alias analysisshare/opto/c2_globals.hpp
VerifyBeforeExitJDK6boolgctrueInDebugproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyBeforeGCJDK6boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyBeforeIterationJDK6boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
VerifyCodeCacheJDK9boolruntimefalsenotproductVerify code cache on memory allocation/deallocationshare/runtime/globals.hpp
VerifyConnectionGraphJDK7boolc2truenotproductVerify Connection Graph construction in Escape Analysisshare/opto/c2_globals.hpp
VerifyDUIteratorsJDK6boolc2truenotproductVerify the safety of all iterations of Bi-directional Edgesshare/opto/c2_globals.hpp
VerifyDataPointerJDK6boolruntimetrueInDebugdevelopVerify the method data pointer during interpreter profilingshare/runtime/globals.hpp
VerifyDependenciesJDK6boolruntimetrueInDebugdevelopExercise and verify the compilation dependency mechanismshare/runtime/globals.hpp
VerifyDuringGCJDK6boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyDuringStartupJDK7boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyFPUJDK6boolruntimefalsedevelopVerify FPU state (check for NaN's, etc.)share/runtime/globals.hpp
VerifyGCLevelJDK6intxgc0
range(0, 1)
productDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyGCStartAtJDK6uintxgc0
range(0, max_uintx)
productDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyGCTypeJDK10ccstrlistgcDIAGNOSTICproductGC type(s) to verify when Verify*GC is enabled.Available types are collector specific.share/gc/shared/gc_globals.hpp
VerifyGraphEdgesJDK6boolc2falsenotproductVerify Bi-directional Edgesshare/opto/c2_globals.hpp
VerifyHashTableKeysJDK6boolc2truenotproductVerify the immutability of keys in the VN hash tablesshare/opto/c2_globals.hpp
VerifyIdealNodeCountJDK7boolc2falsenotproductVerify that tracked dead ideal node count is accurateshare/opto/c2_globals.hpp
VerifyIterativeGVNJDK6boolc2falsedevelopVerify Def-Use modifications during sparse Iterative Global Value Numberingshare/opto/c2_globals.hpp
VerifyJNIEnvThreadJDK6boolruntimefalsenotproductVerify JNIEnv.thread == Thread::current() when entering VM from JNIshare/runtime/globals.hpp
VerifyJNIFieldsJDK6boolruntimetrueInDebugdevelopVerify jfieldIDs for instance fieldsshare/runtime/globals.hpp
VerifyLastFrameJDK6boolruntimefalsenotproductVerify oops on last frame on entry to VMshare/runtime/globals.hpp
VerifyLoopOptimizationsJDK6boolc2falsenotproductverify major loop optimizationsshare/opto/c2_globals.hpp
VerifyMergedCPBytecodesJDK6boolruntimetrueproductVerify bytecodes after RedefineClasses constant pool mergingshare/runtime/globals.hpp
VerifyMetaspaceIntervalJDK13intruntimeDEBUG_ONLY(500) NOT_DEBUG(0)developRun periodic metaspace verifications (0 - none,
1 - always, >1 every nth interval)
share/runtime/globals.hpp
VerifyMethodHandlesJDK6boolruntimetrueInDebugproductDIAGNOSTICshare/runtime/globals.hpp
VerifyObjectStartArrayJDK6boolgctrueproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifyOopsJDK6boolruntimefalsedevelopDo plausibility checks for oopsshare/runtime/globals.hpp
VerifyRegisterAllocatorJDK6boolc2falsenotproductVerify Register Allocatorshare/opto/c2_globals.hpp
VerifyRememberedSetsJDK6boolgcfalseproductDIAGNOSTICshare/gc/shared/gc_globals.hpp
VerifySharedSpacesJDK8boolruntimefalseproductVerify integrity of shared spacesshare/runtime/globals.hpp
VerifyStackAtCallsJDK6boolruntimefalsedevelopVerify that the stack pointer is unchanged after callsshare/runtime/globals.hpp
VerifyStackJDK6boolruntimefalsedevelopVerify stack of each thread when it is entering a runtime callshare/runtime/globals.hpp
VerifyStringTableAtExitJDK8boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
VerifySubSetJDK8ccstrlistgcDIAGNOSTICproductMemory 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_oopsshare/gc/shared/gc_globals.hpp
VerifyThreadJDK6boolruntimefalsedevelopWatch the thread register for corruption (SPARC only)share/runtime/globals.hpp
WalkStackALotJDK6boolruntimefalsenotproductTrace stack (no print) at every exit from the runtime systemshare/runtime/globals.hpp
WarmCallMaxSizeJDK6intxc2999999
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developsize of the largest inlinable methodshare/opto/c2_globals.hpp
WarmCallMaxWorkJDK6intxc2999999
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developexecution time of the largest inlinable methodshare/opto/c2_globals.hpp
WarmCallMinCountJDK6intxc2-1
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developnumber of calls (per method invocation) to enable inliningshare/opto/c2_globals.hpp
WarmCallMinProfitJDK6intxc2-1
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))
developnumber of calls (per method invocation) to enable inliningshare/opto/c2_globals.hpp
WarnOnStalledSpinLockJDK6uintxruntime0notproductPrint warnings for stalled SpinLocksshare/runtime/globals.hpp
WhiteBoxAPIJDK7boolruntimefalseproductDIAGNOSTICshare/runtime/globals.hpp
WizardModeJDK6boolruntimefalsedevelopPrint much more debugging informationshare/runtime/globals.hpp
WorkStealingHardSpinsJDK6uintxgc4096productEXPERIMENTALshare/gc/shared/gc_globals.hpp
WorkStealingSleepMillisJDK6uintxgc1productEXPERIMENTALshare/gc/shared/gc_globals.hpp
WorkStealingSpinToYieldRatioJDK6uintxgc10productEXPERIMENTALshare/gc/shared/gc_globals.hpp
WorkStealingYieldsBeforeSleepJDK6uintxgc5000productEXPERIMENTALshare/gc/shared/gc_globals.hpp
YoungGenerationSizeIncrementJDK6uintxgc20
range(0, 100)
productAdaptive size percentage change in young generationshare/gc/shared/gc_globals.hpp
YoungGenerationSizeSupplementDecayJDK6uintxgc8
range(1, max_uintx)
productDecay factor to YoungedGenerationSizeSupplementshare/gc/shared/gc_globals.hpp
YoungGenerationSizeSupplementJDK6uintxgc80
range(0, 100)
productSupplement to YoungedGenerationSizeIncrement used at startupshare/gc/shared/gc_globals.hpp
YoungPLABSizeJDK6size_tgc4096productSize of young gen promotion LAB's (in HeapWords)share/gc/shared/gc_globals.hpp
ZAllocationSpikeToleranceJDK11doublegc2.0productAllocation spike tolerance factorshare/gc/z/z_globals.hpp
ZCollectionIntervalJDK11uintgc0productForce GC at a fixed time interval (in seconds)share/gc/z/z_globals.hpp
ZFragmentationLimitJDK11doublegc25.0productMaximum allowed heap fragmentationshare/gc/z/z_globals.hpp
ZMarkStackSpaceLimitJDK12size_tgc8*G
range(32*M, 1024*G)
productMaximum number of bytes allocated for mark stacksshare/gc/z/z_globals.hpp
ZProactiveJDK11boolgctrueproductEnable proactive GC cyclesshare/gc/z/z_globals.hpp
ZStatisticsIntervalJDK11uintgc10
range(1, (uint)-1)
productDIAGNOSTICshare/gc/z/z_globals.hpp
ZUncommitDelayJDK13uintxgc5 * 60productUncommit memory if it has been unused for the specified amount of time (in seconds)share/gc/z/z_globals.hpp
ZUncommitJDK13boolgctrueproductUncommit unused memoryshare/gc/z/z_globals.hpp
ZVerifyForwardingJDK11boolgcfalseproductDIAGNOSTICshare/gc/z/z_globals.hpp
ZVerifyMarkingJDK11boolgctrueInDebugproductDIAGNOSTICshare/gc/z/z_globals.hpp
ZVerifyObjectsJDK13boolgcfalseproductDIAGNOSTICshare/gc/z/z_globals.hpp
ZVerifyRootsJDK13boolgctrueInDebugproductDIAGNOSTICshare/gc/z/z_globals.hpp
ZVerifyViewsJDK13boolgcfalseproductDIAGNOSTICshare/gc/z/z_globals.hpp
ZapEmptyStackFieldsJDK9bools390falsedevelopWrite 0x0101... to empty stack fields. Use this to ease stack debugging.cpu/s390/globals_s390.hpp
ZapFillerObjectsJDK6boolruntimetrueInDebugdevelopZap filler objects with 0xDEAFBABEshare/runtime/globals.hpp
ZapMemoryJDK7boolppcfalsedevelopWrite 0x0101... to empty memory. Use this to ease debugging.cpu/ppc/globals_ppc.hpp
ZapResourceAreaJDK6boolruntimetrueInDebugdevelopZap freed resource/arena space with 0xABABABABshare/runtime/globals.hpp
ZapStackSegmentsJDK6boolruntimetrueInDebugnotproductZap allocated/freed stack segments with 0xFADFADEDshare/runtime/globals.hpp
ZapUnusedHeapAreaJDK6boolruntimetrueInDebugdevelopZap unused heap space with 0xBAADBABEshare/runtime/globals.hpp
ZapVMHandleAreaJDK6boolruntimetrueInDebugnotproductZap freed VM handle space with 0xBCBCBCBCshare/runtime/globals.hpp
ZeroTLABJDK6boolgcfalseproductZero out the newly created TLABshare/gc/shared/gc_globals.hpp
ZombieALotIntervalJDK6intxruntime5notproductNumber of exits until ZombieALot kicks inshare/runtime/globals.hpp
ZombieALotJDK6boolruntimefalsenotproductCreate zombies (non-entrant) at exit from the runtime systemshare/runtime/globals.hpp
batchJDK6disable background compilationlauncher.properties
bootclasspath/aJDK6<directories and zip/jar files separated by :> append to end of bootstrap class pathlauncher.properties
check:jniJDK6perform additional checks for JNI functionslauncher.properties
compJDK13forces compilation of methods on first invocationlauncher.properties
debugJDK13does nothing. Provided for backward compatibility.launcher.properties
diagJDK13show additional diagnostic messageslauncher.properties
futureJDK6enable strictest checks, anticipating future default. This option is deprecated and may be removed in a future release.launcher.properties
hashCodeJDK6intxruntime5productEXPERIMENTALshare/runtime/globals.hpp
intJDK6interpreted mode execution onlylauncher.properties
internalversionJDK13 displays more detailed JVM version information than the -version optionlauncher.properties
logJDK9<opts>Configure or enable logging with the Java Virtual Machine (JVM) unified logging framework. Use -Xlog:help for details.launcher.properties
loggcJDK6<file>log GC status to a file with time stamps. This option is deprecated and may be removed in a future release. It is replaced by -Xlog:gc:<file>.launcher.properties
mixedJDK6mixed mode execution (default)launcher.properties
mnJDK13<size>sets the initial and maximum size (in bytes) of the heap for the young generation (nursery)launcher.properties
msJDK6<size>set initial Java heap sizelauncher.properties
mxJDK6<size>set maximum Java heap sizelauncher.properties
noclassgcJDK6disable class garbage collectionlauncher.properties
rsJDK6reduce use of OS signals by Java/VM (see documentation)launcher.properties
share:autoJDK6use shared class data if possible (default)launcher.properties
share:offJDK6do not attempt to use shared class datalauncher.properties
share:onJDK6require using shared class data, otherwise fail. This is a testing option and may lead to intermittent failures. It should not be used in production environments.launcher.properties
showSettings:allJDK13 show all settings and continuelauncher.properties
showSettings:localeJDK13 show all locale related settings and continuelauncher.properties
showSettings:propertiesJDK13 show all property settings and continuelauncher.properties
showSettings:systemJDK13 (Linux Only) show host system or container configuration and continuelauncher.properties
showSettings:vmJDK13 show all vm related settings and continuelauncher.properties
showSettingsJDK13show all settings and continuelauncher.properties
ssJDK6<size>set java thread stack sizelauncher.properties
verifyJDK13
sets the mode of the bytecode verifier
Note that option -Xverify:none is deprecated and
may be removed in a future release.
launcher.properties