--- a/src/hotspot/share/gc/cms/cms_globals.hpp Fri Nov 08 14:54:17 2019 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,429 +0,0 @@
-/*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#ifndef SHARE_GC_CMS_CMS_GLOBALS_HPP
-#define SHARE_GC_CMS_CMS_GLOBALS_HPP
-
-#define GC_CMS_FLAGS(develop, \
- develop_pd, \
- product, \
- product_pd, \
- diagnostic, \
- diagnostic_pd, \
- experimental, \
- notproduct, \
- manageable, \
- product_rw, \
- lp64_product, \
- range, \
- constraint, \
- writeable) \
- product(bool, UseCMSBestFit, true, \
- "Use CMS best fit allocation strategy") \
- \
- product(size_t, CMSOldPLABMax, 1024, \
- "Maximum size of CMS gen promotion LAB caches per worker " \
- "per block size") \
- range(1, max_uintx) \
- constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \
- \
- product(size_t, CMSOldPLABMin, 16, \
- "Minimum size of CMS gen promotion LAB caches per worker " \
- "per block size") \
- range(1, max_uintx) \
- constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \
- \
- product(uintx, CMSOldPLABNumRefills, 4, \
- "Nominal number of refills of CMS gen promotion LAB cache " \
- "per worker per block size") \
- range(1, max_uintx) \
- \
- product(bool, CMSOldPLABResizeQuicker, false, \
- "React on-the-fly during a scavenge to a sudden " \
- "change in block demand rate") \
- \
- product(uintx, CMSOldPLABToleranceFactor, 4, \
- "The tolerance of the phase-change detector for on-the-fly " \
- "PLAB resizing during a scavenge") \
- range(1, max_uintx) \
- \
- product(uintx, CMSOldPLABReactivityFactor, 2, \
- "The gain in the feedback loop for on-the-fly PLAB resizing " \
- "during a scavenge") \
- range(1, max_uintx) \
- \
- product_pd(size_t, CMSYoungGenPerWorker, \
- "The maximum size of young gen chosen by default per GC worker " \
- "thread available") \
- range(1, max_uintx) \
- \
- product(uintx, CMSIncrementalSafetyFactor, 10, \
- "Percentage (0-100) used to add conservatism when computing the " \
- "duty cycle") \
- range(0, 100) \
- \
- product(uintx, CMSExpAvgFactor, 50, \
- "Percentage (0-100) used to weight the current sample when " \
- "computing exponential averages for CMS statistics") \
- range(0, 100) \
- \
- product(uintx, CMS_FLSWeight, 75, \
- "Percentage (0-100) used to weight the current sample when " \
- "computing exponentially decaying averages for CMS FLS " \
- "statistics") \
- range(0, 100) \
- \
- product(uintx, CMS_FLSPadding, 1, \
- "The multiple of deviation from mean to use for buffering " \
- "against volatility in free list demand") \
- range(0, max_juint) \
- \
- product(uintx, FLSCoalescePolicy, 2, \
- "CMS: aggressiveness level for coalescing, increasing " \
- "from 0 to 4") \
- range(0, 4) \
- \
- product(bool, FLSAlwaysCoalesceLarge, false, \
- "CMS: larger free blocks are always available for coalescing") \
- \
- product(double, FLSLargestBlockCoalesceProximity, 0.99, \
- "CMS: the smaller the percentage the greater the coalescing " \
- "force") \
- range(0.0, 1.0) \
- \
- product(double, CMSSmallCoalSurplusPercent, 1.05, \
- "CMS: the factor by which to inflate estimated demand of small " \
- "block sizes to prevent coalescing with an adjoining block") \
- range(0.0, DBL_MAX) \
- \
- product(double, CMSLargeCoalSurplusPercent, 0.95, \
- "CMS: the factor by which to inflate estimated demand of large " \
- "block sizes to prevent coalescing with an adjoining block") \
- range(0.0, DBL_MAX) \
- \
- product(double, CMSSmallSplitSurplusPercent, 1.10, \
- "CMS: the factor by which to inflate estimated demand of small " \
- "block sizes to prevent splitting to supply demand for smaller " \
- "blocks") \
- range(0.0, DBL_MAX) \
- \
- product(double, CMSLargeSplitSurplusPercent, 1.00, \
- "CMS: the factor by which to inflate estimated demand of large " \
- "block sizes to prevent splitting to supply demand for smaller " \
- "blocks") \
- range(0.0, DBL_MAX) \
- \
- product(bool, CMSExtrapolateSweep, false, \
- "CMS: cushion for block demand during sweep") \
- \
- product(uintx, CMS_SweepWeight, 75, \
- "Percentage (0-100) used to weight the current sample when " \
- "computing exponentially decaying average for inter-sweep " \
- "duration") \
- range(0, 100) \
- \
- product(uintx, CMS_SweepPadding, 1, \
- "The multiple of deviation from mean to use for buffering " \
- "against volatility in inter-sweep duration") \
- range(0, max_juint) \
- \
- product(uintx, CMS_SweepTimerThresholdMillis, 10, \
- "Skip block flux-rate sampling for an epoch unless inter-sweep " \
- "duration exceeds this threshold in milliseconds") \
- range(0, max_uintx) \
- \
- product(bool, CMSClassUnloadingEnabled, true, \
- "Whether class unloading enabled when using CMS GC") \
- \
- product(uintx, CMSClassUnloadingMaxInterval, 0, \
- "When CMS class unloading is enabled, the maximum CMS cycle " \
- "count for which classes may not be unloaded") \
- range(0, max_uintx) \
- \
- product(uintx, CMSIndexedFreeListReplenish, 4, \
- "Replenish an indexed free list with this number of chunks") \
- range(1, max_uintx) \
- \
- product(bool, CMSReplenishIntermediate, true, \
- "Replenish all intermediate free-list caches") \
- \
- product(bool, CMSSplitIndexedFreeListBlocks, true, \
- "When satisfying batched demand, split blocks from the " \
- "IndexedFreeList whose size is a multiple of requested size") \
- \
- product(bool, CMSLoopWarn, false, \
- "Warn in case of excessive CMS looping") \
- \
- notproduct(bool, CMSMarkStackOverflowALot, false, \
- "Simulate frequent marking stack / work queue overflow") \
- \
- notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
- "An \"interval\" counter that determines how frequently " \
- "to simulate overflow; a smaller number increases frequency") \
- \
- product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
- "Maximum number of abortable preclean iterations, if > 0") \
- range(0, max_uintx) \
- \
- product(intx, CMSMaxAbortablePrecleanTime, 5000, \
- "Maximum time in abortable preclean (in milliseconds)") \
- range(0, max_intx) \
- \
- product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
- "Nominal minimum work per abortable preclean iteration") \
- range(0, max_uintx) \
- \
- manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
- "Time that we sleep between iterations when not given " \
- "enough work per iteration") \
- range(0, max_intx) \
- \
- /* 4096 = CardTable::card_size_in_words * BitsPerWord */ \
- product(size_t, CMSRescanMultiple, 32, \
- "Size (in cards) of CMS parallel rescan task") \
- range(1, SIZE_MAX / 4096) \
- constraint(CMSRescanMultipleConstraintFunc,AfterMemoryInit) \
- \
- /* 4096 = CardTable::card_size_in_words * BitsPerWord */ \
- product(size_t, CMSConcMarkMultiple, 32, \
- "Size (in cards) of CMS concurrent MT marking task") \
- range(1, SIZE_MAX / 4096) \
- constraint(CMSConcMarkMultipleConstraintFunc,AfterMemoryInit) \
- \
- product(bool, CMSAbortSemantics, false, \
- "Whether abort-on-overflow semantics is implemented") \
- \
- product(bool, CMSParallelInitialMarkEnabled, true, \
- "Use the parallel initial mark.") \
- \
- product(bool, CMSParallelRemarkEnabled, true, \
- "Whether parallel remark enabled (only if ParNewGC)") \
- \
- product(bool, CMSParallelSurvivorRemarkEnabled, true, \
- "Whether parallel remark of survivor space " \
- "enabled (effective only if CMSParallelRemarkEnabled)") \
- \
- product(bool, CMSPLABRecordAlways, true, \
- "Always record survivor space PLAB boundaries (effective only " \
- "if CMSParallelSurvivorRemarkEnabled)") \
- \
- product(bool, CMSEdenChunksRecordAlways, true, \
- "Always record eden chunks used for the parallel initial mark " \
- "or remark of eden") \
- \
- product(bool, CMSConcurrentMTEnabled, true, \
- "Whether multi-threaded concurrent work enabled " \
- "(effective only if ParNewGC)") \
- \
- product(bool, CMSPrecleaningEnabled, true, \
- "Whether concurrent precleaning enabled") \
- \
- product(uintx, CMSPrecleanIter, 3, \
- "Maximum number of precleaning iteration passes") \
- range(0, 9) \
- \
- product(uintx, CMSPrecleanDenominator, 3, \
- "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
- "ratio") \
- range(1, max_uintx) \
- constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \
- \
- product(uintx, CMSPrecleanNumerator, 2, \
- "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
- "ratio") \
- range(0, max_uintx-1) \
- constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \
- \
- product(bool, CMSPrecleanRefLists1, true, \
- "Preclean ref lists during (initial) preclean phase") \
- \
- product(bool, CMSPrecleanRefLists2, false, \
- "Preclean ref lists during abortable preclean phase") \
- \
- product(bool, CMSPrecleanSurvivors1, false, \
- "Preclean survivors during (initial) preclean phase") \
- \
- product(bool, CMSPrecleanSurvivors2, true, \
- "Preclean survivors during abortable preclean phase") \
- \
- product(uintx, CMSPrecleanThreshold, 1000, \
- "Do not iterate again if number of dirty cards is less than this")\
- range(100, max_uintx) \
- \
- product(bool, CMSCleanOnEnter, true, \
- "Clean-on-enter optimization for reducing number of dirty cards") \
- \
- product(uintx, CMSRemarkVerifyVariant, 1, \
- "Choose variant (1,2) of verification following remark") \
- range(1, 2) \
- \
- product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
- "If Eden size is below this, do not try to schedule remark") \
- range(0, max_uintx) \
- \
- product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
- "The Eden occupancy percentage (0-100) at which " \
- "to try and schedule remark pause") \
- range(0, 100) \
- \
- product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
- "Start sampling eden top at least before young gen " \
- "occupancy reaches 1/<ratio> of the size at which " \
- "we plan to schedule remark") \
- range(1, max_uintx) \
- \
- product(uintx, CMSSamplingGrain, 16*K, \
- "The minimum distance between eden samples for CMS (see above)") \
- range(ObjectAlignmentInBytes, max_uintx) \
- constraint(CMSSamplingGrainConstraintFunc,AfterMemoryInit) \
- \
- product(bool, CMSScavengeBeforeRemark, false, \
- "Attempt scavenge before the CMS remark step") \
- \
- product(uintx, CMSWorkQueueDrainThreshold, 10, \
- "Don't drain below this size per parallel worker/thief") \
- range(1, max_juint) \
- constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \
- \
- manageable(intx, CMSWaitDuration, 2000, \
- "Time in milliseconds that CMS thread waits for young GC") \
- range(min_jint, max_jint) \
- \
- develop(uintx, CMSCheckInterval, 1000, \
- "Interval in milliseconds that CMS thread checks if it " \
- "should start a collection cycle") \
- \
- product(bool, CMSYield, true, \
- "Yield between steps of CMS") \
- \
- product(size_t, CMSBitMapYieldQuantum, 10*M, \
- "Bitmap operations should process at most this many bits " \
- "between yields") \
- range(1, max_uintx) \
- constraint(CMSBitMapYieldQuantumConstraintFunc,AfterMemoryInit) \
- \
- product(bool, CMSPrintChunksInDump, false, \
- "If logging for the \"gc\" and \"promotion\" tags is enabled on" \
- "trace level include more detailed information about the" \
- "free chunks") \
- \
- product(bool, CMSPrintObjectsInDump, false, \
- "If logging for the \"gc\" and \"promotion\" tags is enabled on" \
- "trace level include more detailed information about the" \
- "allocated objects") \
- \
- diagnostic(bool, FLSVerifyAllHeapReferences, false, \
- "Verify that all references across the FLS boundary " \
- "are to valid objects") \
- \
- diagnostic(bool, FLSVerifyLists, false, \
- "Do lots of (expensive) FreeListSpace verification") \
- \
- diagnostic(bool, FLSVerifyIndexTable, false, \
- "Do lots of (expensive) FLS index table verification") \
- \
- product(uintx, CMSTriggerRatio, 80, \
- "Percentage of MinHeapFreeRatio in CMS generation that is " \
- "allocated before a CMS collection cycle commences") \
- range(0, 100) \
- \
- product(uintx, CMSBootstrapOccupancy, 50, \
- "Percentage CMS generation occupancy at which to " \
- "initiate CMS collection for bootstrapping collection stats") \
- range(0, 100) \
- \
- product(intx, CMSInitiatingOccupancyFraction, -1, \
- "Percentage CMS generation occupancy to start a CMS collection " \
- "cycle. A negative value means that CMSTriggerRatio is used") \
- range(min_intx, 100) \
- \
- manageable(intx, CMSTriggerInterval, -1, \
- "Commence a CMS collection cycle (at least) every so many " \
- "milliseconds (0 permanently, -1 disabled)") \
- range(-1, max_intx) \
- \
- product(bool, UseCMSInitiatingOccupancyOnly, false, \
- "Only use occupancy as a criterion for starting a CMS collection")\
- \
- product(uintx, CMSIsTooFullPercentage, 98, \
- "An absolute ceiling above which CMS will always consider the " \
- "unloading of classes when class unloading is enabled") \
- range(0, 100) \
- \
- develop(bool, CMSTestInFreeList, false, \
- "Check if the coalesced range is already in the " \
- "free lists as claimed") \
- \
- notproduct(bool, CMSVerifyReturnedBytes, false, \
- "Check that all the garbage collected was returned to the " \
- "free lists") \
- \
- diagnostic(bool, BindCMSThreadToCPU, false, \
- "Bind CMS Thread to CPU if possible") \
- \
- diagnostic(uintx, CPUForCMSThread, 0, \
- "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
- range(0, max_juint) \
- \
- product(uintx, CMSCoordinatorYieldSleepCount, 10, \
- "Number of times the coordinator GC thread will sleep while " \
- "yielding before giving up and resuming GC") \
- range(0, max_juint) \
- \
- product(uintx, CMSYieldSleepCount, 0, \
- "Number of times a GC thread (minus the coordinator) " \
- "will sleep while yielding before giving up and resuming GC") \
- range(0, max_juint) \
- \
- product(bool, ParGCUseLocalOverflow, false, \
- "Instead of a global overflow list, use local overflow stacks") \
- \
- product(bool, ParGCTrimOverflow, true, \
- "Eagerly trim the local overflow lists " \
- "(when ParGCUseLocalOverflow)") \
- \
- notproduct(bool, ParGCWorkQueueOverflowALot, false, \
- "Simulate work queue overflow in ParNew") \
- \
- notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
- "An `interval' counter that determines how frequently " \
- "we simulate overflow; a smaller number increases frequency") \
- \
- product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
- "The desired number of objects to claim from the overflow list") \
- range(0, max_uintx) \
- \
- diagnostic(uintx, ParGCStridesPerThread, 2, \
- "The number of strides per worker thread that we divide up the " \
- "card table scanning work into") \
- range(1, max_uintx) \
- constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \
- \
- diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
- "The number of cards in each chunk of the parallel chunks used " \
- "during card table scanning") \
- range(1, max_intx) \
- constraint(ParGCCardsPerStrideChunkConstraintFunc,AfterMemoryInit)
-
-#endif // SHARE_GC_CMS_CMS_GLOBALS_HPP