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Performance Edition Overview
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Liberica JDK: Performance Edition Overview

1. Introduction to Liberica JDK Performance Edition

Liberica JDK Performance Edition (or liberica-perf) brings some of the performance of JVM 17 and JVM 21 to projects that can’t afford complete migration out of JDK 8 or JDK 11. Liberica JDK Performance Edition is available for all platforms the Liberica JDK 8 and 11 are available for.

2. Features and Enhancements

Liberica JDK Performance Edition includes the following features:

  • Z Garbage Collector (new in JDK 8, improved in JDK 11): a scalable, low latency garbage collector.

  • Compact Strings (new in JDK 8): a space-efficient internal representation of strings, which reduces memory footprint and garbage collection activity; it’s enabled by default.

  • Unified JVM Logging (new in JDK 8): replaces JDK options that print details about the JVM with -Xlog options.

In addition, Liberica JDK Performance Edition includes the following enhancements:

  • Garbage-First (G1) Garbage Collector: targeted for multiprocessor machines scaling to a large amount of memory. This is the default garbage collector for all versions of Liberica JDK Performance Edition.

  • G1 String Deduplication: reduces the memory footprint of String objects on the Java heap by taking advantage of the fact that many String objects are identical. It’s disabled by default, but you can enable it with the -XX:+UseStringDeduplication option.

  • Class Data Sharing (CDS): helps reduce the startup time and memory footprint between multiple JVMs. It’s enabled by default in Liberica JDK Performance Edition. To disable it, see Manually Controlling Class Data Sharing.

  • Enhanced Java Flight Recorder: a tool for collecting diagnostic and profiling data for a running Java application.

Note:

Concurrent Mark Sweep Garbage Collector is absent in liberica-perf 8 and 11.

3. Installing Liberica JDK Performance Edition

Installation procedure for Liberica JDK Performance Edition is similar to Liberica JDK. For detailed Liberica JDK installation and configuration instructions, see Installation Guide for the corresponding Liberica JDK version.

4. Changes to JVM Runtime Options

Several JVM runtime options were added from JDK 17 and JDK 21, some were removed. See the tables below for additional information.

Changes to runtime options in JDK 11 Performance Edition

Added options in liberica-perf 11 based on JVM 17

The following is a list of options available in liberica-perf 11, but absent in JDK 11. For more information on these parameters, see the official documentation.

OptionDescription

AdjustStackSizeForTLS

Increases the thread stack size to include space for glibc static thread-local storage (TLS) if true.

AllowRedefinitionToAddDeleteMethods

Allows redefinition to add and delete private static or final methods for compatibility with old releases.

ArchiveClassesAtExit

Specifies the path and name of the dynamic archive file.

AsyncLogBufferSize

Specifies the memory in bytes for the intermediate buffer.

C1InlineStackLimit

Limits stack frame size impact for inlining decisions for C1 JIT compiler.

C1MaxInlineLevel

Specifies the maximum number of nested calls that are inlined by C1 JIT compiler.

C1MaxInlineSize

Specifies the maximum bytecode size of a method to be inlined by C1 JIT compiler.

C1MaxRecursiveInlineLevel

Specifies the maximum number of nested recursive calls that are inlined by C1 JIT compiler.

C1MaxTrivialSize

Specifies the maximum bytecode size of a trivial method to be inlined by C1 JIT compiler.

CompilationMode

Sets C1 JIT compiler compilation mode, such as default, quick-only, high-only, high-only-quick-internal.

DynamicDumpSharedSpaces

Dynamic archive

G1PeriodicGCInterval

Determines a minimum interval in ms at which G1 Garbage Collector considers performing a garbage collection.

G1PeriodicGCInvokesConcurrent

If set, periodic garbage collections trigger a concurrent marking or continue the existing collection cycle, otherwise trigger a Full GC.

G1PeriodicGCSystemLoadThreshold

Sets a threshold for the current system load as returned by the hosts getloadavg() call to determine whether a periodic garbage collection should be triggered.

G1RSetRegionEntries

Sets the max number of regions.

G1RSetSparseRegionEntries

Sets the eager reclaim threshold. If set the humongous objects are reclaimed only if their remembered set has less than the specified number of entries.

HeapDumpGzipLevel

Sets the level of compressing the heap dump.

MetaspaceReclaimPolicy

Reclaims memory after purging and returns it to the Operating System. This switch controls fine-tuning of metaspace reclamation (balanced|aggressive|none).

MinHeapSize

Sets the minimum size (in bytes) of the memory allocation pool.

RecordDynamicDumpInfo

Records a separate dynamically-generated archive on top of the default system for each application.

ShowCodeDetailsInExceptionMessages

Enables printing of improved NullPointerException messages.

SweeperThreshold

Sets the cache sweeper threshold value.

UseContainerCpuShares

Takes cpu.shares into account when determining how many threads to allocate to the various thread pools.

UseEmptySlotsInSupers

Allows allocating fields in empty slots of super-classes.

UseNotificationThread

If set uses Notification Thread.

ZMarkStackSpaceLimit

Sets the maximum number of bytes allocated for mark stacks.

ZProactive

Enables proactive GC cycles.

ZUncommit

Uncommit memory if it has been unused for the specified amount of time (in seconds).

ZUncommitDelay

Uncommit memory if it has been unused for the specified amount of time (in seconds).

Removed and renamed options in liberica-perf 11 based on JVM 17

The table below lists options unavailable in liberica-perf 11 and the options that were renamed.

JDK 11 optionResolution in liberica-perf 11

AggressiveOpts

Deleted

AllowJNIEnvProxy

Deleted

AllowNonVirtualCalls

Deleted

AssertOnSuspendWaitFailure

Deleted

AssumeMP

Deleted

BindGCTaskThreadsToCPUs

Deleted

BranchOnRegister

Deleted

BytecodeVerificationLocal

Moved to the diagnostic flags category. Use with -XX:+UnlockDiagnosticVMOptions

BytecodeVerificationRemote

Moved to the diagnostic flags category. Use with -XX:+UnlockDiagnosticVMOptions

CMS*

CMS GC is not supported in liberica-perf 11

CalculateClassFingerprint

AOT is not supported in liberica-perf 11

CompactFields

Deleted

CompilationPolicyChoice

Deleted

CompilerThreadHintNoPreempt

Deleted

Debugging

Deleted

DeoptimizeRandom

Moved to the non-product category. Not available in release build.

ErrorReportServer

Deleted

FLSAlwaysCoalesceLarge

CMS GC is not supported in liberica-perf 11

FLSCoalescePolicy

CMS GC is not supported in liberica-perf 11

FLSLargestBlockCoalesceProximity

CMS GC is not supported in liberica-perf 11

FailOverToOldVerifier

Deleted

FieldsAllocationStyle

Deleted

ForceNUMA

Deleted

G1RSetRegionEntries

Deleted

G1RSetScanBlockSize

Deleted

G1RSetSparseRegionEntries

Deleted

GCLockerInvokesConcurrent

Deleted

GCTaskTimeStampEntries

Deleted

InitialBootClassLoaderMetaspaceSize

Deleted

InsertMemBarAfterArraycopy

Deleted

LIRFillDelaySlots

Deleted

MonitorBound

Deleted

MonitorInUseLists

Deleted

NeedsDeoptSuspend

Deleted

OldPLABWeight

Deleted

ParGCDesiredObjsFromOverflowList

Deleted

ParGCTrimOverflow

Deleted

ParGCUseLocalOverflow

Deleted

PrintJNIResolving

Functionality moved to unified logging. Use -Xlog:jni+resolve instead

PrintSafepointStatistics

Functionality moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSafepointStatisticsCount

Functionality moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSafepointStatisticsTimeout

Functionality moved to unified logging. Use -Xlog:safepoint+stats instead

PrintVMQWaitTime

Deleted

ProfileIntervals

Deleted

ProfileIntervalsTicks

Deleted

ProfileVM

Deleted

ProfilerPrintByteCodeStatistics

Deleted

ProfilerRecordPC

Deleted

ResizeOldPLAB

Deleted

ShenandoahSoftMaxHeapSize

Known as SoftMaxHeapSize in liberica-perf 11

StressLdcRewrite

Moved to the diagnostic flags category. Use with -XX:+UnlockDiagnosticVMOptions

SuspendRetryCount

Deleted

SuspendRetryDelay

Deleted

ThreadLocalHandshakes

Deleted

Tier3AOTBackEdgeThreshold

AOT is not supported in liberica-perf 11

Tier3AOTCompileThreshold

AOT is not supported in liberica-perf 11

Tier3AOTInvocationThreshold

AOT is not supported in liberica-perf 11

Tier3AOTMinInvocationThreshold

AOT is not supported in liberica-perf 11

TraceSuspendWaitFailures

Deleted

TransmitErrorReport

Deleted

UnlinkSymbolsALot

Deleted

UseAdaptiveGCBoundary

Deleted

UseCMSBestFit

CMS GC is not supported in liberica-perf 11

UseCMSInitiatingOccupancyOnly

CMS GC is not supported in liberica-perf 11

UseConcMarkSweepGC

CMS GC is not supported in liberica-perf 11

UseGCTaskAffinity

Deleted

UseLWPSynchronization

Deleted

UseLargePagesInMetaspace

Deleted

UseLegacyJNINameEscaping

Deleted

UseMembar

Deleted

UseOSErrorReporting

Deleted

UseRDPCForConstantTableBase

Deleted

VMThreadHintNoPreempt

Deleted

VerifyMergedCPBytecodes

Deleted

ZMarkStacksMax

Deleted

Zpath

Deleted

ZStallOnOutOfMemory

Deleted

ZStatisticsInterval

Deleted

Added options in liberica-perf 11 based on JVM 21

The table below lists options added to liberica-perf 11 based on JVM 21.

OptionDescription

AdjustStackSizeForTLS

Increases the thread stack size to include space for glibc static thread-local storage (TLS) if true.

AllowRedefinitionToAddDeleteMethods

Allows redefinition to add and delete private static or final methods for compatibility with old releases.

ArchiveClassesAtExit

Specifies the path and name of the dynamic archive file.

AsyncLogBufferSize

Specifies the memory in bytes for the intermediate buffer.

AutoCreateSharedArchive

Automatically creates Dynamic CDS Archive File. The specified archive file is created if it does not exist, or if it was generated by a different JDK version.

C1InlineStackLimit

Limits stack frame size impact for inlining decisions for C1 JIT compiler.

C1MaxInlineLevel

Specifies the maximum number of nested calls that are inlined by C1 JIT compiler.

C1MaxInlineSize

Specifies the maximum bytecode size of a method to be inlined by C1 JIT compiler.

C1MaxRecursiveInlineLevel

Specifies the maximum number of nested recursive calls that are inlined by C1 JIT compiler.

C1MaxTrivialSize

Specifies the maximum bytecode size of a trivial method to be inlined by C1 JIT compiler.

CompilationMode

Sets C1 JIT compiler compilation mode, such as default, quick-only, high-only, high-only-quick-internal.

G1PeriodicGCInterval

Determines a minimum interval in ms at which G1 Garbage Collector considers performing a garbage collection.

G1PeriodicGCInvokesConcurrent

If set, periodic garbage collections trigger a concurrent marking or continue the existing collection cycle, otherwise trigger a Full GC.

G1PeriodicGCSystemLoadThreshold

Sets a threshold for the current system load as returned by the hosts getloadavg() call to determine whether a periodic garbage collection should be triggered.

G1RSetRegionEntries

Sets the max number of regions.

G1RSetSparseRegionEntries

Sets the eager reclaim threshold. If set the humongous objects are reclaimed only if their remembered set has less than the specified number of entries.

GCCardSizeInBytes

Specifies the size of the remembered set entries.

HeapDumpGzipLevel

Sets the level of compressing the heap dump.

MinHeapSize

Sets the minimum size (in bytes) of the memory allocation pool.

RecordDynamicDumpInfo

Records a separate dynamically-generated archive on top of the default system for each application.

ShowCodeDetailsInExceptionMessages

Enables printing of improved NullPointerException messages.

SweeperThreshold

Sets the cache sweeper threshold value.

UseCodeAging

Inserts a counter to measure the age of a method when it is compiled.

UseContainerCpuShares

Takes cpu.shares into account when determining how many threads to allocate to the various thread pools.

UseEmptySlotsInSupers

Allows allocating fields in empty slots of super-classes.

UseNotificationThread

If set uses Notification Thread.

ZCollectionIntervalMajor

If set forces GC at a fixed time interval (in seconds).

ZCollectionIntervalMinor

If set forces Minor GC at a fixed time interval (in seconds).

ZCollectionIntervalOnly

If set the GC only uses timers for GC heuristics.

ZGenerational

Uses the Generational ZGC.

ZMarkStackSpaceLimit

Sets the maximum number of bytes allocated for mark stacks.

ZProactive

Enables proactive GC cycles.

ZUncommit

Uncommit memory if it has been unused for the specified amount of time (in seconds).

ZUncommitDelay

Uncommit memory if it has been unused for the specified amount of time (in seconds).

ZYoungCompactionLimit

Sets the maximum allowed garbage in young pages. Default: 25.0 (range between 0-100%).

Removed and renamed options in liberica-perf 11 based on JVM 21

The table below lists options that were added and renamed in liberica-perf 11 based on JVM 21.

JDK 11 optionResolution in liberica-perf 11

AggressiveOpts

Deleted

AliasLevel

Deleted

AllowJNIEnvProxy

Deleted

AllowNonVirtualCalls

Deleted

AlwaysLockClassLoader

Deleted

AssertOnSuspendWaitFailure

Deleted

AssumeMP

Deleted

BiasedLockingBulkRebiasThreshold

Deleted

BiasedLockingBulkRevokeThreshold

Deleted

BiasedLockingDecayTime

Deleted

BiasedLockingStartupDelay

Deleted

BindGCTaskThreadsToCPU

Deleted

BranchOnRegister

Deleted

BytecodeVerificationLocal

Moved to diagnostic mode. Use with -XX:+UnlockDiagnosticVMOptions

BytecodeVerificationRemote

Moved to diagnostic mode. Use with -XX:+UnlockDiagnosticVMOptions

CalculateClassFingerprint

AOT is not supported in Express builds

CMS*

CMS GC was removed along with its parameters

CompactFields

Deleted

CompilationPolicyChoice

Deleted

CompilerThreadHintNoPreempt

Deleted

CriticalJNINatives

Deleted

Debugging

Deleted

DeoptimizeRandom

Not available in product(release) builds

DumpSharedSpaces

Deleted

ErrorReportServer

Deleted

ExtendedDTraceProbes

Deleted

FailOverToOldVerifier

Deleted

FieldsAllocationStyle

Deleted

FilterSpuriousWakeups

Deleted

FLSAlwaysCoalesceLarge

Deleted

FLSCoalescePolicy

Deleted

FLSLargestBlockCoalesceProximity

Deleted

ForceNUMA

Deleted

G1ConcRefinementGreenZone

Deleted

G1ConcRefinementRedZone

Deleted

G1ConcRefinementServiceIntervalMillis

Deleted

G1ConcRefinementThresholdStep

Deleted

G1ConcRefinementYellowZone

Deleted

G1ConcRSHotCardLimit

Deleted

G1ConcRSLogCacheSize

Deleted

G1RSetScanBlockSize

Deleted

G1UseAdaptiveConcRefinement

Deleted

GCLockerInvokesConcurrent

Deleted

GCTaskTimeStampEntries

Deleted

InitialBootClassLoaderMetaspaceSize

Deleted

InsertMemBarAfterArraycopy

Deleted

LIRFillDelaySlots

Deleted

MinInliningThreshold

Deleted

MonitorBound

Deleted

MonitorInUseLists

Deleted

NeedsDeoptSuspend

Deleted

OldPLABWeight

Deleted

ParGCDesiredObjsFromOverflowList

Deleted

ParGCTrimOverflow

Deleted

ParGCUseLocalOverflow

Deleted

PreferContainerQuotaForCPUCount

Deleted

PrefetchFieldsAhead

Deleted

PrintJNIResolving

Moved to unified logging. Use -Xlog:jni+resolve instead

PrintSafepointStatistics

Moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSafepointStatisticsCount

Moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSafepointStatisticsTimeout

Moved to unified logging. Use -Xlog:safepoint+stats instead

PrintVMQWaitTime

Deleted

ProfileIntervals

Deleted

ProfileIntervalsTicks

Deleted

ProfilerPrintByteCodeStatistics

Deleted

ProfilerRecordPC

Deleted

ProfileVM

Deleted

RefDiscoveryPolicy

Deleted

RequireSharedSpaces

Deleted

ResizeOldPLAB

Deleted

ShenandoahSoftMaxHeapSize

Use SoftMaxHeapSize in jdk express instead

SoftMaxHeapSize

instead of old ShenandoahSoftMaxHeapSize

StressLdcRewrite

Moved to diagnostic mode. Use with -XX:+UnlockDiagnosticVMOptions

ThreadLocalHandshakes

Deleted

Tier3AOTBackEdgeThreshold

AOT is not supported in Express builds

Tier3AOTCompileThreshold

AOT is not supported in Express builds

Tier3AOTInvocationThreshold

AOT is not supported in Express builds

Tier3AOTMinInvocationThreshold

AOT is not supported in Express builds

TraceSuspendWaitFailures

Deleted

TransmitErrorReport

Deleted

TrimNativeHeapInterval

Moved to be available in product(release) builds

UnlinkSymbolsALot

Deleted

UseAdaptiveGCBoundary

Deleted

UseBiasedLocking

Deleted

UseCMSBestFit

CMS GC was removed along with its parameters

UseCMSInitiatingOccupancyOnly

CMS GC was removed along with its parameters

UseConcMarkSweepGC

CMS GC was removed along with its parameters

UseGCTaskAffinity

Deleted

UseHeavyMonitors

Deleted

UseLargePagesInMetaspace

Deleted

UseLegacyJNINameEscaping

Deleted

UseLWPSynchronization

Deleted

UseMembar

Deleted

UseOSErrorReporting

Deleted

UseRDPCForConstantTableBase

Deleted

UseSharedSpaces

Deleted

UseSystemMemoryBarrier

Moved to be available in product(release) builds

VerifyMergedCPBytecodes

Deleted

VMThreadHintNoPreempt

Deleted

ZMarkStacksMax

Deleted

Zpath

Deleted

ZStallOnOutOfMemory

Deleted

ZStatisticsInterval

Deleted

Changes to Runtime Options in JDK 8 Performance Edition

Added runtime options in liberica-perf 8 based on JVM 17

The following is a list of options available in liberica-perf 8, but absent in JDK 8.

OptionDescription

AdjustStackSizeForTLS

Increases the thread stack size to include space for glibc static thread-local storage (TLS) if true.

AllocateHeapAt

Specifies a path to the directory where a temporary file is created to use as the backup store for Java Heap.

AllowRedefinitionToAddDeleteMethods

Allows redefinition to add and delete private static or final methods for compatibility with old releases.

AllowVectorizeOnDemand

Globally suppresses vectorization set in VectorizeMethod.

ArchiveClassesAtExit

Specifies the path and name of the dynamic archive file.

ArrayCopyLoadStoreMaxElem

Specifies the maximum number of arraycopy elements inlined as a sequence of loads/stores.

AsyncLogBufferSize

Specifies the memory in bytes for the intermediate buffer.

C1InlineStackLimit

Limits stack frame size impact for inlining decisions for C1 JIT compiler.

C1MaxInlineLevel

Specifies the maximum number of nested calls that are inlined by C1 JIT compiler.

C1MaxInlineSize

Specifies the maximum bytecode size of a method to be inlined by C1 JIT compiler.

C1MaxRecursiveInlineLevel

Specifies the maximum number of nested recursive calls that are inlined by C1 JIT compiler.

C1MaxTrivialSize

Specifies the maximum bytecode size of a trivial method to be inlined by C1 JIT compiler.

CompactStrings

Disables the Compact Strings feature. By default, this option is enabled. When this option is enabled, Java Strings containing only single-byte characters are internally represented and stored as single-byte-per-character Strings using ISO-8859-1 / Latin-1 encoding.

CompilationMode

Sets C1 JIT compiler compilation mode, such as default, quick-only, high-only, high-only-quick-internal.

CompileThresholdScaling

Provides unified control of first compilation. This option controls when methods are first compiled for both the tiered and the nontiered modes of operation.

CreateCoredumpOnCrash

Creates core/mini dump on VM fatal error.

DoReserveCopyInSuperWord

Creates reserve copy of graph in SuperWord.

DynamicDumpSharedSpaces

Dynamic archive

EnableDynamicAgentLoading

Allows dynamic loading of agents into a running JVM.

ErrorLogTimeout

Timeout, in seconds, to limit the time spent on writing an error log in case of a crash.

ExecutingUnitTests

Specifies whether the JVM can run unit tests or not.

ExtensiveErrorReports

Enables the reporting of more extensive error information in the ErrorFile.

G1PeriodicGCInterval

Determines a minimum interval in ms at which G1 Garbage Collector considers performing a garbage collection.

G1PeriodicGCInvokesConcurrent

If set, periodic garbage collections trigger a concurrent marking or continue the existing collection cycle, otherwise trigger a Full GC.

G1PeriodicGCSystemLoadThreshold

Sets a threshold for the current system load as returned by the hosts getloadavg() call to determine whether a periodic garbage collection should be triggered.

G1UseAdaptiveIHOP

Controls adaptive calculation of the old generation occupancy to start background work preparing for an old generation collection.

HeapDumpGzipLevel

Sets the compression level of the heap dump.

HeapSearchSteps

Heap allocation steps through preferred address regions to find where it can allocate the heap. Number of steps to take per region.

LoopPercentProfileLimit

Unrolls loop bodies with the percent node count of profile limit.

LoopStripMiningIter

Controls the number of iterations in the inner strip mined loop.

LoopStripMiningIterShortLoop

Controls loop strip mining optimization.

MetaspaceReclaimPolicy

Reclaims memory after purging and returns it to the Operating System. This switch controls fine-tuning of metaspace reclamation (balanced|aggressive|none).

MinHeapSize

Sets the minimum size (in bytes) of the memory allocation pool.

NonNMethodCodeHeapSize

Sets the size in bytes of the code segment containing nonmethod code.

NonProfiledCodeHeapSize

Sets the size in bytes of the code segment containing nonprofiled methods.

OptoRegScheduling

Instruction Scheduling before register allocation for pressure.

PreTouchParallelChunkSize

The size of the chunk of memory for each thread when using parallel memory pre-touch.

PrintExtendedThreadInfo

Prints more information in thread dump.

PrintFlagsRanges

Prints the range specified and allows automatic testing of the values.

ProfiledCodeHeapSize

Sets the size in bytes of the code segment containing profiled methods.

RecordDynamicDumpInfo

Records a separate dynamically-generated archive on top of the default system for each application.

RestrictReservedStack

Restricts @ReservedStackAccess to trusted classes.

SegmentedCodeCache

Enables segmentation of the code cache.

SharedArchiveConfigFile

Specifies additional shared data added to the archive file.

SharedArchiveFile

Specifies the path and name of the class data sharing (CDS) archive file.

SharedSymbolTableBucketSize

Sets the average number of symbols per bucket in shared table.

ShenandoahGCHeuristics

Sets the GC heuristics to use. This option fine-tunes the selected GC mode by choosing when to start the GC, how much to process on each cycle, and what other features to automatically enable.

ShenandoahGCMode

Sets the GC mode to use. Among other things, this defines which barriers are in use.

ShowCodeDetailsInExceptionMessages

Enables printing of improved NullPointerException messages.

ShrinkHeapInSteps

When 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.

SoftMaxHeapSize

Sets the soft limit for maximum heap size (in bytes).

StackReservedPages

Sets the number of the reserved zone (reserved to annotated methods) pages of 4KB size. If pages are bigger, reserved zone is aligned respectively.

StartAggressiveSweepingAt

Force stack scanning of active methods to aggressively remove unused code when only the given percentage of the code cache is free. For a segmented code cache, it is the percentage of the non-profiled heap and for a non-segmented code cache, it is the percentage of the total code cache.

SuperWordLoopUnrollAnalysis

Maps the number of unrolls for the main loop via Superword Level Parallelism analysis.

SuperWordReductions

Enables reductions support when using SuperWords.

SweeperThreshold

Sets the cache sweeper threshold value.

UseBASE64Intrinsics

Controls the use of accelerated BASE64 encoding routines for java.util.Base64.

UseCMoveUnconditionally

Generates CMove (scalar and vector) instructions regardless of profitability analysis.

UseCodeAging

Inserts a counter to measure the age of a method when it is compiled.

UseContainerCpuShares

Takes cpu.shares into account when determining how many threads to allocate to the various thread pools.

UseDynamicNumberOfCompilerThreads

Dynamically creates compiler thread up to the limit specified by -XX:CICompilerCount.

UseEmptySlotsInSupers

Allows allocating fields in empty slots of super-classes.

UseFMA

Enables hardware-based FMA intrinsics for hardware where FMA instructions are available (such as, Intel and ARM64).

UseNotificationThread

If set uses Notification Thread.

UseProfiledLoopPredicate

Moves predicates out of loops based on profiling data.

UseShenandoahGC

Enables the use of the Shenandoah garbage collector.

UseSubwordForMaxVector

Uses Subword Analysis to set the maximum vector size.

UseVectorCmov

Uses Vectorized Cmov.

UseXMMForObjInit

Uses XMM/YMM MOVDQU instruction for Object Initialization.

UseZGC

Enables the use of the Z garbage collector (ZGC).

ZAllocationSpikeTolerance

Sets the allocation spike tolerance for ZGC.

ZCollectionInterval

Sets the maximum interval (in seconds) between two GC cycles when using ZGC.

ZFragmentationLimit

Sets the maximum acceptable heap fragmentation (in percent) for ZGC.

ZMarkStackSpaceLimit

Sets the maximum number of bytes allocated for mark stacks.

ZProactive

Enables proactive GC cycles.

ZUncommit

Uncommit memory if it has been unused for the specified amount of time (in seconds).

ZUncommitDelay

Uncommit memory if it has been unused for the specified amount of time (in seconds).

Removed and renamed runtime options in liberica-perf 8 based on JVM 17

The table below lists options unavailable in liberica-perf 8 and the options that were renamed.

JDK 8 optionResolution in liberica-perf 8

AdaptiveSizePausePolicy

Deleted

AdjustConcurrency

Deleted

AggressiveOpts

Deleted

AllowJNIEnvProxy

Deleted

AllowNonVirtualCalls

Deleted

AssertOnSuspendWaitFailure

Deleted

AssumeMP

Deleted

AutoGCSelectPauseMillis

Deleted

BackEdgeThreshold

Deleted. Use -XX:OnStackReplacePercentage

BindGCTaskThreadsToCPUs

Deleted

BranchOnRegister

Deleted

BytecodeVerificationLocal

Is now a diagnostic option

BytecodeVerificationRemote

Is now a diagnostic option

CheckEndorsedAndExtDirs

Deleted

ClearFPUAtPark

Deleted

CMS*

CMS GC removed as well as its flags

CodeCacheMinimumFreeSpace

Deleted

CollectGen0First

Deleted

CompactFields

Deleted

CompilationPolicyChoice

Deleted

CompilerThreadHintNoPreempt

Deleted

ConvertSleepToYield

Deleted

ConvertYieldToSleep

Deleted

CreateMinidumpOnCrash

Deleted. Use CreateCoredumpOnCrash instead

Debugging

Deleted

DefaultMaxRAMFraction

Deleted. Use MaxRAMFraction instead

DefaultThreadPriority

Deleted

DeferPollingPageLoopCount

Deleted

DeferThrSuspendLoopCount

Deleted

DeoptimizeRandom

Only available in non-product builds

EmitSync

Deleted

EnableTracing

Deleted

ErrorReportServer

Deleted

ExplicitGCInvokesConcurrentAndUnloadsClasses

Deleted

FailOverToOldVerifier

Deleted

FastTLABRefill

Deleted

FenceInstruction

Deleted

FieldsAllocationStyle

Deleted

FLSAlwaysCoalesceLarge

Deleted

FLSCoalescePolicy

Deleted

FLSLargestBlockCoalesceProximity

Deleted

ForceNUMA

Deleted

G1RSetScanBlockSize

Deleted

GCLockerInvokesConcurrent

Deleted

GCLogFileSize

Deleted

GCTaskTimeStampEntries

Deleted

InitialBootClassLoaderMetaspaceSize

Deleted

InsertMemBarAfterArraycopy

Deleted

JNIDetachReleasesMonitors

Deleted

LazyBootClassLoader

Deleted

LIRFillDelaySlots

Deleted

LogJFR

Deleted

MonitorBound

Deleted

MonitorInUseLists

Deleted

MustCallLoadClassInternal

Deleted

NeedsDeoptSuspend

Deleted

NmethodSweepCheckInterval

Deleted

NmethodSweepFraction

Deleted

NumberOfGCLogFiles

Deleted

OldPLABWeight

Deleted

ParallelGCVerbose

Deleted

ParGCDesiredObjsFromOverflowList

Deleted

ParGCTrimOverflow

Deleted

ParGCUseLocalOverflow

Deleted

PreInflateSpin

Deleted

PrintAdaptiveSizePolicy

Deleted

PrintClassHistogramAfterFullGC

Deleted

PrintClassHistogramBeforeFullGC

Deleted

PrintCMSInitiationStatistics

Deleted

PrintCMSStatistics

Deleted

PrintFLSCensus

Deleted

PrintFLSStatistics

Deleted

PrintGCApplicationConcurrentTime

Deleted

PrintGCApplicationStoppedTime

Deleted

PrintGCCause

Deleted

PrintGCDateStamps

Deleted

PrintGCID

Deleted

PrintGCTaskTimeStamps

Deleted

PrintGCTimeStamps

Deleted

PrintHeapAtGC

Deleted

PrintHeapAtGCExtended

Deleted

PrintJNIGCStalls

Deleted

PrintJNIResolving

Deleted

PrintOldPLAB

Deleted

PrintOopAddress

Deleted

PrintParallelOldGCPhaseTimes

Deleted

PrintPLAB

Deleted

PrintPromotionFailure

Deleted

PrintReferenceGC

Deleted

PrintSafepointStatistics

Deleted

PrintSafepointStatisticsCount

Deleted

PrintSafepointStatisticsTimeout

Deleted

PrintSharedSpaces

Deleted

PrintStringDeduplicationStatistics

Deleted

PrintTenuringDistribution

Deleted

PrintTLAB

Deleted

PrintVMQWaitTime

Deleted

ProfileIntervals

Deleted

ProfileIntervalsTicks

Deleted

ProfilerPrintByteCodeStatistics

Deleted

ProfilerRecordPC

Deleted

ProfileVM

Deleted

ReadPrefetchInstr

Deleted

ReflectionWrapResolutionErrors

Deleted

ResizeOldPLAB

Deleted

SafepointPollOffset

Deleted

SafepointSpinBeforeYield

Deleted

SharedMiscCodeSize

Deleted

SharedMiscDataSize

Deleted

SharedReadOnlySize

Deleted

SharedReadWriteSize

Deleted

SpecialEncodeISOArray

Moved to diagnostic flags

StarvationMonitorInterval

Deleted

StressLdcRewrite

Moved to diagnostic flags

SuspendRetryCount

Deleted

SuspendRetryDelay

Deleted

SyncFlags

Deleted

SyncKnobs

Deleted

SyncVerbose

Deleted

ThreadSafetyMargin

Deleted

TraceBiasedLocking

Deleted

TraceClassLoading

Deleted

TraceClassLoadingPreorder

Deleted

TraceClassPaths

Deleted

TraceClassResolution

Deleted

TraceClassUnloading

Deleted

TraceDynamicGCThreads

Deleted

TraceExceptions

Deleted

TraceGen0Time

Deleted. Functionality moved to unified logging.

TraceGen1Time

Deleted. Functionality moved to unified logging.

TraceLoaderConstraints

Deleted

TraceMetadataHumongousAllocation

Deleted

TraceMonitorInflation

Deleted

TraceParallelOldGCTasks

Deleted

TraceRedefineClasses

Deleted

TraceSafepointCleanupTime

Deleted

TraceSuspendWaitFailures

Deleted

TransmitErrorReport

Deleted

UnlinkSymbolsALot

Deleted

UnlockCommercialFeatures

Deleted

Use486InstrsOnly

Deleted

UseAdaptiveGCBoundary

Deleted

UseAESIntrinsics

Moved to diagnostic flags

UseAltSigs

Deleted

UseAutoGCSelectPolicy

Deleted

UseBoundThreads

Deleted

UseCMSBestFit

Deleted

UseCMSCollectionPassing

Deleted

UseCMSCompactAtFullCollection

Deleted

UseCMSInitiatingOccupancyOnly

Deleted

UseCompilerSafepoints

Deleted

UseConcMarkSweepGC

Deleted

UseCRC32Intrinsics

Moved to diagnostic flags

UseFastAccessorMethods

Deleted

UseFastEmptyMethods

Deleted

UseGCLogFileRotation

Deleted

UseGCTaskAffinity

Deleted

UseGHASHIntrinsics

Moved to diagnostic flags

UseLargePagesInMetaspace

Deleted

UseLegacyJNINameEscaping

Deleted

UseLockedTracing

Deleted

UseLWPSynchronization

Deleted

UseMathExactIntrinsics

Moved to diagnostic flags

UseMembar

Deleted

UseMontgomeryMultiplyIntrinsic

Moved to diagnostic flags

UseMontgomerySquareIntrinsic

Moved to diagnostic flags

UseMulAddIntrinsic

Moved to diagnostic flags

UseMultiplyToLenIntrinsic

Moved to diagnostic flags

UseOSErrorReporting

Deleted from linux build

UseParallelOldGC

Deleted

UseParNewGC

Deleted

UseRDPCForConstantTableBase

Deleted

UseSHA1Intrinsics

Moved to diagnostic flags

UseSHA256Intrinsics

Moved to diagnostic flags

UseSHA512Intrinsics

Moved to diagnostic flags

UseSquareToLenIntrinsic

Moved to diagnostic flags

UseVMInterruptibleIO

Deleted

VerifyMergedCPBytecodes

Deleted

VMThreadHintNoPreempt

Deleted

WorkAroundNPTLTimedWaitHang

Deleted

Added runtime options in liberica-perf 8 based on JVM 21

The following is a list of options available in liberica-perf 8, but absent in JDK 8.

OptionDescription

AdjustStackSizeForTLS

Increases the thread stack size to include space for glibc static thread-local storage (TLS) if true.

AllocateHeapAt

Specifies a path to the directory where a temporary file is created to use as the backup store for Java Heap.

AllowRedefinitionToAddDeleteMethods

Allows redefinition to add and delete private static or final methods for compatibility with old releases.

AllowVectorizeOnDemand

Globally suppresses vectorization set in VectorizeMethod.

ArchiveClassesAtExit

Specifies the path and name of the dynamic archive file.

ArrayCopyLoadStoreMaxElem

Specifies the maximum number of arraycopy elements inlined as a sequence of loads/stores.

AsyncLogBufferSize

Specifies the memory in bytes for the intermediate buffer.

AutoCreateSharedArchive

Automatically creates Dynamic CDS Archive File. The specified archive file is created if it does not exist, or if it was generated by a different JDK version.

C1InlineStackLimit

Limits stack frame size impact for inlining decisions for C1 JIT compiler.

C1MaxInlineLevel

Specifies the maximum number of nested calls that are inlined by C1 JIT compiler.

C1MaxInlineSize

Specifies the maximum bytecode size of a method to be inlined by C1 JIT compiler.

C1MaxRecursiveInlineLevel

Specifies the maximum number of nested recursive calls that are inlined by C1 JIT compiler.

C1MaxTrivialSize

Specifies the maximum bytecode size of a trivial method to be inlined by C1 JIT compiler.

CompactStrings

Disables the Compact Strings feature. By default, this option is enabled. When this option is enabled, Java Strings containing only single-byte characters are internally represented and stored as single-byte-per-character Strings using ISO-8859-1 / Latin-1 encoding.

CompilationMode

Sets C1 JIT compiler compilation mode, such as default, quick-only, high-only, high-only-quick-internal.

CompileThresholdScaling

Provides unified control of first compilation. This option controls when methods are first compiled for both the tiered and the nontiered modes of operation.

DoReserveCopyInSuperWord

Creates reserve copy of graph in SuperWord.

EnableDynamicAgentLoading

Allows dynamic loading of agents into a running JVM.

ErrorLogTimeout

Timeout, in seconds, to limit the time spent on writing an error log in case of a crash.

ExecutingUnitTests

Specifies whether the JVM can run unit tests or not.

ExtensiveErrorReports

Enables the reporting of more extensive error information in the ErrorFile.

G1PeriodicGCInterval

Determines a minimum interval in ms at which G1 Garbage Collector considers performing a garbage collection.

G1PeriodicGCInvokesConcurrent

If set, periodic garbage collections trigger a concurrent marking or continue the existing collection cycle, otherwise trigger a Full GC.

G1PeriodicGCSystemLoadThreshold

Sets a threshold for the current system load as returned by the hosts getloadavg() call to determine whether a periodic garbage collection should be triggered.

G1UseAdaptiveIHOP

Controls adaptive calculation of the old generation occupancy to start background work preparing for an old generation collection.

GCCardSizeInBytes

Specifies the size of the remembered set entries.

HeapDumpGzipLevel

Sets the compression level of the heap dump.

HeapSearchSteps

Heap allocation steps through preferred address regions to find where it can allocate the heap. Number of steps to take per region.

LoopPercentProfileLimit

Unrolls loop bodies with the percent node count of profile limit.

LoopStripMiningIter

Controls the number of iterations in the inner strip mined loop.

LoopStripMiningIterShortLoop

Controls loop strip mining optimization.

MinHeapSize

Sets the minimum size (in bytes) of the memory allocation pool.

NonNMethodCodeHeapSize

Sets the size in bytes of the code segment containing nonmethod code.

NonProfiledCodeHeapSize

Sets the size in bytes of the code segment containing nonprofiled methods.

OptoRegScheduling

Instruction Scheduling before register allocation for pressure.

PreTouchParallelChunkSize

The size of the chunk of memory for each thread when using parallel memory pre-touch.

PrintExtendedThreadInfo

Prints more information in thread dump.

PrintFlagsRanges

Prints the range specified and allows automatic testing of the values.

ProfiledCodeHeapSize

Sets the size in bytes of the code segment containing profiled methods.

RecordDynamicDumpInfo

Records a separate dynamically-generated archive on top of the default system for each application.

RestrictReservedStack

Restricts @ReservedStackAccess to trusted classes.

SegmentedCodeCache

Enables segmentation of the code cache.

SharedArchiveConfigFile

Specifies additional shared data added to the archive file.

SharedArchiveFile

Specifies the path and name of the class data sharing (CDS) archive file.

SharedSymbolTableBucketSize

Sets the average number of symbols per bucket in shared table.

ShenandoahGCHeuristics

Sets the GC heuristics to use. This option fine-tunes the selected GC mode by choosing when to start the GC, how much to process on each cycle, and what other features to automatically enable.

ShenandoahGCMode

Sets the GC mode to use. Among other things, this defines which barriers are in use.

ShowCodeDetailsInExceptionMessages

Enables printing of improved NullPointerException messages.

ShrinkHeapInSteps

When 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.

SoftMaxHeapSize

Sets the soft limit for maximum heap size (in bytes).

StackReservedPages

Sets the number of the reserved zone (reserved to annotated methods) pages of 4KB size. If pages are bigger, reserved zone is aligned respectively.

StartAggressiveSweepingAt

Force stack scanning of active methods to aggressively remove unused code when only the given percentage of the code cache is free. For a segmented code cache, it is the percentage of the non-profiled heap and for a non-segmented code cache, it is the percentage of the total code cache.

SuperWordLoopUnrollAnalysis

Maps the number of unrolls for the main loop via Superword Level Parallelism analysis.

SuperWordReductions

Enables reductions support when using SuperWords.

SweeperThreshold

Sets the cache sweeper threshold value.

TrimNativeHeapInterval

It allows the JVM to trim the native heap at periodic intervals. This option is only available on Linux with glibc.

UseAppCDS

Enables the use of Class Data Sharing (CDS) in your java application.

UseCMoveUnconditionally

Generates CMove (scalar and vector) instructions regardless of profitability analysis.

UseDynamicNumberOfCompilerThreads

Dynamically creates compiler thread up to the limit specified by -XX:CICompilerCount.

UseEmptySlotsInSupers

Allows allocating fields in empty slots of super-classes.

UseFMA

Enables hardware-based FMA intrinsics for hardware where FMA instructions are available (such as, Intel and ARM64).

UseNotificationThread

If set uses Notification Thread.

UseProfiledLoopPredicate

Moves predicates out of loops based on profiling data.

UseShenandoahGC

Enables the use of the Shenandoah garbage collector.

UseSubwordForMaxVector

Uses Subword Analysis to set the maximum vector size.

UseSystemMemoryBarrier

Enable system memory barrier if supported by OS.

UseVectorCmov

Uses Vectorized Cmov.

UseXMMForObjInit

Uses XMM/YMM MOVDQU instruction for Object Initialization.

UseZGC

Enables the use of the Z garbage collector (ZGC).

ZAllocationSpikeTolerance

Sets the allocation spike tolerance for ZGC.

ZCollectionInterval

Sets the maximum interval (in seconds) between two GC cycles when using ZGC.

ZCollectionIntervalMajor

If set forces GC at a fixed time interval (in seconds).

ZCollectionIntervalMinor

If set forces Minor GC at a fixed time interval (in seconds).

ZCollectionIntervalOnly

If set the GC only uses timers for GC heuristics.

ZFragmentationLimit

Sets the maximum acceptable heap fragmentation (in percent) for ZGC.

ZGenerational

Uses the Generational ZGC.

ZMarkStackSpaceLimit

Sets the maximum number of bytes allocated for mark stacks.

ZProactive

Enables proactive GC cycles.

ZUncommit

Uncommit memory if it has been unused for the specified amount of time (in seconds).

ZUncommitDelay

Uncommit memory if it has been unused for the specified amount of time (in seconds).

ZYoungCompactionLimit

Sets the maximum allowed garbage in young pages. Default: 25.0 (range between 0-100%).

Removed and renamed runtime options in liberica-perf 8 based on JVM 21

The table below lists options unavailable in liberica-perf 8 and the options that were renamed.

JDK 8 optionResolution in liberica-perf 8

AdaptiveSizePausePolicy

Deleted

AdjustConcurrency

Deleted

afepointPollOffset

Deleted

AggressiveOpts

Deleted

AliasLevel

Deleted

AllowJNIEnvProxy

Deleted

AllowNonVirtualCalls

Deleted

AlwaysLockClassLoader

Deleted

AssertOnSuspendWaitFailure

Deleted

AssumeMP

Deleted

AutoGCSelectPauseMillis

Deleted

BackEdgeThreshold

Deleted

BiasedLockingBulkRebiasThreshold

Deleted

BiasedLockingBulkRevokeThreshold

Deleted

BiasedLockingDecayTime

Deleted

BiasedLockingStartupDelay

Deleted

BindGCTaskThreadsToCPU

Deleted

BranchOnRegister

Deleted

BytecodeVerificationLocal

Moved to diagnostic mode. Use with -XX:+UnlockDiagnosticVMOptions

BytecodeVerificationRemote

Moved to diagnostic mode. Use with -XX:+UnlockDiagnosticVMOptions

CheckEndorsedAndExtDirs

Deleted

ClearFPUAtPark

Deleted

CMS*

CMS GC was removed along with its parameters

CodeCacheMinimumFreeSpace

Deleted

CollectGen0First

Deleted

CompactFields

Deleted

CompilationPolicyChoice

Deleted

CompilerThreadHintNoPreempt

Deleted

ContendedPaddingWidth

Deleted

ConvertSleepToYield

Deleted

ConvertYieldToSleep

Deleted

CreateMinidumpOnCrash

Renamed to CreateCoredumpOnCrash

CriticalJNINatives

Deleted

Debugging

Deleted

DefaultMaxRAMFraction

Deleted

DefaultThreadPriority

Deleted

DeferPollingPageLoopCount

Deleted

DeferThrSuspendLoopCount

Deleted

DeoptimizeRandom

Not available in product(release) builds

DumpSharedSpaces

Deleted

EmitSync

Deleted

EnableTracing

Deleted

ErrorReportServer

Deleted

ExplicitGCInvokesConcurrentAndUnloadsClasses

Deleted

ExtendedDTraceProbes

Deleted

FailOverToOldVerifier

Deleted

FastTLABRefill

Deleted

FenceInstruction

Deleted

FieldsAllocationStyle

Deleted

FilterSpuriousWakeups

Deleted

FLSAlwaysCoalesceLarge

Deleted

FLSCoalescePolicy

Deleted

FLSLargestBlockCoalesceProximity

Deleted

ForceNUMA

Deleted

G1ConcRefinementGreenZone

Deleted

G1ConcRefinementRedZone

Deleted

G1ConcRefinementServiceIntervalMillis

Deleted

G1ConcRefinementThresholdStep

Deleted

G1ConcRefinementYellowZone

Deleted

G1ConcRSHotCardLimit

Deleted

G1ConcRSLogCacheSize

Deleted

G1RSetRegionEntries

Deleted

G1RSetScanBlockSize

Deleted

G1RSetSparseRegionEntries

Deleted

G1UseAdaptiveConcRefinement

Deleted

GCLockerInvokesConcurrent

Deleted

GCLogFileSize

Deleted

GCTaskTimeStampEntries

Deleted

hashCode

Deleted

InitialBootClassLoaderMetaspaceSize

Deleted

InsertMemBarAfterArraycopy

Deleted

JNIDetachReleasesMonitors

Deleted

LazyBootClassLoader

Deleted

LIRFillDelaySlots

Deleted

LogJFR

Deleted

MinInliningThreshold

Deleted

MonitorBound

Deleted

MonitorInUseLists

Deleted

MustCallLoadClassInternal

Deleted

NeedsDeoptSuspend

Deleted

NmethodSweepCheckInterval

Deleted

NmethodSweepFraction

Deleted

NumberOfGCLogFiles

Deleted

OldPLABWeight

Deleted

ParallelGCVerbose

Deleted

ParGCDesiredObjsFromOverflowList

Deleted

ParGCTrimOverflow

Deleted

ParGCUseLocalOverflow

Deleted

PreferContainerQuotaForCPUCount

Deleted

PrefetchFieldsAhead

Deleted

PreInflateSpin

Deleted

PrintAdaptiveSizePolicy

Deleted

PrintClassHistogramAfterFullGC

Deleted

PrintClassHistogramBeforeFullGC

Deleted

PrintFLSCensus

Deleted

PrintFLSStatistics

Deleted

PrintGCApplicationConcurrentTime

Deleted

PrintGCApplicationStoppedTime

Deleted

PrintGCCause

Deleted

PrintGCDateStamps

Deleted

PrintGCID

Deleted

PrintGCTaskTimeStamps

Deleted

PrintGCTimeStamps

Deleted

PrintHeapAtGC

Deleted

PrintHeapAtGCExtended

Deleted

PrintJNIGCStalls

Deleted

PrintJNIResolving

Moved to unified logging. Use -Xlog:jni+resolve instead

PrintOldPLAB

Deleted

PrintOopAddress

Deleted

PrintParallelOldGCPhaseTimes

Deleted

PrintPLAB

Deleted

PrintPromotionFailure

Deleted

PrintReferenceGC

Deleted

PrintSafepointStatistics

Moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSafepointStatisticsCount

Moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSafepointStatisticsTimeout

Moved to unified logging. Use -Xlog:safepoint+stats instead

PrintSharedSpaces

Deleted

PrintStringDeduplicationStatistics

Deleted

PrintTenuringDistribution

Deleted

PrintTLAB

Deleted

PrintVMQWaitTime

Deleted

ProfileIntervals

Deleted

ProfileIntervalsTicks

Deleted

ProfilerPrintByteCodeStatistics

Deleted

ProfilerRecordPC

Deleted

ProfileVM

Deleted

ReadPrefetchInstr

Deleted

RefDiscoveryPolicy

Deleted

ReflectionWrapResolutionErrors

Deleted

RequireSharedSpaces

Deleted

ResizeOldPLAB

Deleted

SafepointSpinBeforeYield

Deleted

SharedMiscCodeSize

Deleted

SharedMiscDataSize

Deleted

SharedReadOnlySize

Deleted

SharedReadWriteSize

Deleted

SpecialEncodeISOArray

Deleted

StarvationMonitorInterval

Deleted

StressLdcRewrite

Deleted

SyncFlags

Deleted

SyncKnobs

Deleted

SyncVerbose

Deleted

ThreadSafetyMargin

Deleted

TraceBiasedLocking

Deleted

TraceClassLoading

Deleted

TraceClassLoadingPreorder

Deleted

TraceClassPaths

Deleted

TraceClassResolution

Deleted

TraceClassUnloading

Deleted

TraceDynamicGCThreads

Deleted

TraceExceptions

Deleted

TraceGen0Time

Deleted

TraceGen1Time

Deleted

TraceLoaderConstraints

Deleted

TraceMetadataHumongousAllocation

Deleted

TraceMonitorInflation

Deleted

TraceParallelOldGCTasks

Deleted

TraceRedefineClasses

Deleted

TraceSafepointCleanupTime

Deleted

TraceSuspendWaitFailures

Deleted

TransmitErrorReport

Deleted

UnlinkSymbolsALot

Deleted

UnlockCommercialFeatures

Deleted

Use486InstrsOnly

Deleted

UseAdaptiveGCBoundary

Deleted

UseAESIntrinsics

Deleted

UseAltSigs

Deleted

UseBASE64Intrinsics

Deleted

UseBiasedLocking

Deleted

UseCompilerSafepoints

Deleted

UseConcMarkSweepGC

Deleted

UseCRC32Intrinsics

Deleted

UseFastAccessorMethods

Deleted

UseFastEmptyMethods

Deleted

UseGCLogFileRotation

Deleted

UseGCTaskAffinity

Deleted

UseGHASHIntrinsics

Deleted

UseHeavyMonitors

Deleted

UseLargePagesInMetaspace

Deleted

UseLegacyJNINameEscaping

Deleted

UseLockedTracing

Deleted

UseLWPSynchronization

Deleted

UseMathExactIntrinsics

Deleted

UseMembar

Deleted

UseMontgomeryMultiplyIntrinsic

Deleted

UseMontgomerySquareIntrinsic

Deleted

UseMulAddIntrinsic

Deleted

UseMultiplyToLenIntrinsic

Deleted

UseOSErrorReporting

Deleted

UseParNewGC

Deleted

UseRDPCForConstantTableBase

Deleted

UseSHA1Intrinsics

Deleted

UseSHA256Intrinsics

Deleted

UseSHA512Intrinsics

Deleted

UseSharedSpaces

Deleted

UseSquareToLenIntrinsic

Deleted

UseVMInterruptibleIO

Deleted

VerifyMergedCPBytecodes

Deleted

VMThreadHintNoPreempt

Deleted

WorkAroundNPTLTimedWaitHang

Deleted

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