326 lines
23 KiB
C++
326 lines
23 KiB
C++
/*
|
|
* Copyright (c) 2001, 2016, 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_VM_GC_G1_G1_GLOBALS_HPP
|
|
#define SHARE_VM_GC_G1_G1_GLOBALS_HPP
|
|
|
|
#include "runtime/globals.hpp"
|
|
#include <float.h> // for DBL_MAX
|
|
//
|
|
// Defines all globals flags used by the garbage-first compiler.
|
|
//
|
|
|
|
#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, range, constraint) \
|
|
\
|
|
product(bool, G1UseAdaptiveIHOP, true, \
|
|
"Adaptively adjust the initiating heap occupancy from the " \
|
|
"initial value of InitiatingHeapOccupancyPercent. The policy " \
|
|
"attempts to start marking in time based on application " \
|
|
"behavior.") \
|
|
\
|
|
experimental(size_t, G1AdaptiveIHOPNumInitialSamples, 3, \
|
|
"How many completed time periods from initial mark to first " \
|
|
"mixed gc are required to use the input values for prediction " \
|
|
"of the optimal occupancy to start marking.") \
|
|
range(1, max_intx) \
|
|
\
|
|
product(uintx, G1ConfidencePercent, 50, \
|
|
"Confidence level for MMU/pause predictions") \
|
|
range(0, 100) \
|
|
\
|
|
develop(intx, G1MarkingOverheadPercent, 0, \
|
|
"Overhead of concurrent marking") \
|
|
range(0, 100) \
|
|
\
|
|
diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
|
|
"The period (in number of GCs) at which we will generate " \
|
|
"update buffer processing info " \
|
|
"(0 means do not periodically generate this info); " \
|
|
"it also requires that logging is enabled on the trace" \
|
|
"level for gc+remset") \
|
|
range(0, max_intx) \
|
|
\
|
|
product(double, G1ConcMarkStepDurationMillis, 10.0, \
|
|
"Target duration of individual concurrent marking steps " \
|
|
"in milliseconds.") \
|
|
range(1.0, DBL_MAX) \
|
|
\
|
|
product(intx, G1RefProcDrainInterval, 10, \
|
|
"The number of discovered reference objects to process before " \
|
|
"draining concurrent marking work queues.") \
|
|
range(1, max_intx) \
|
|
\
|
|
experimental(double, G1LastPLABAverageOccupancy, 50.0, \
|
|
"The expected average occupancy of the last PLAB in " \
|
|
"percent.") \
|
|
range(0.001, 100.0) \
|
|
\
|
|
product(size_t, G1SATBBufferSize, 1*K, \
|
|
"Number of entries in an SATB log buffer.") \
|
|
range(1, max_uintx) \
|
|
\
|
|
develop(intx, G1SATBProcessCompletedThreshold, 20, \
|
|
"Number of completed buffers that triggers log processing.") \
|
|
range(0, max_jint) \
|
|
\
|
|
product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
|
|
"Before 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.") \
|
|
range(0, 100) \
|
|
\
|
|
experimental(intx, G1ExpandByPercentOfAvailable, 20, \
|
|
"When expanding, % of uncommitted space to claim.") \
|
|
range(0, 100) \
|
|
\
|
|
develop(bool, G1RSBarrierRegionFilter, true, \
|
|
"If true, generate region filtering code in RS barrier") \
|
|
\
|
|
product(size_t, G1UpdateBufferSize, 256, \
|
|
"Size of an update buffer") \
|
|
range(1, NOT_LP64(32*M) LP64_ONLY(1*G)) \
|
|
\
|
|
product(size_t, G1ConcRefinementYellowZone, 0, \
|
|
"Number of enqueued update buffers that will " \
|
|
"trigger concurrent processing. Will be selected ergonomically " \
|
|
"by default.") \
|
|
range(0, max_intx) \
|
|
\
|
|
product(size_t, G1ConcRefinementRedZone, 0, \
|
|
"Maximum number of enqueued update buffers before mutator " \
|
|
"threads start processing new ones instead of enqueueing them. " \
|
|
"Will be selected ergonomically by default. Zero will disable " \
|
|
"concurrent processing.") \
|
|
range(0, max_intx) \
|
|
\
|
|
product(size_t, G1ConcRefinementGreenZone, 0, \
|
|
"The number of update buffers that are left in the queue by the " \
|
|
"concurrent processing threads. Will be selected ergonomically " \
|
|
"by default.") \
|
|
range(0, max_intx) \
|
|
\
|
|
product(uintx, G1ConcRefinementServiceIntervalMillis, 300, \
|
|
"The last concurrent refinement thread wakes up every " \
|
|
"specified number of milliseconds to do miscellaneous work.") \
|
|
range(0, max_jint) \
|
|
\
|
|
product(size_t, G1ConcRefinementThresholdStep, 0, \
|
|
"Each time the rset update queue increases by this amount " \
|
|
"activate the next refinement thread if available. " \
|
|
"Will be selected ergonomically by default.") \
|
|
range(0, SIZE_MAX) \
|
|
\
|
|
product(intx, G1RSetUpdatingPauseTimePercent, 10, \
|
|
"A target percentage of time that is allowed to be spend on " \
|
|
"process RS update buffers during the collection pause.") \
|
|
range(0, 100) \
|
|
\
|
|
product(bool, G1UseAdaptiveConcRefinement, true, \
|
|
"Select green, yellow and red zones adaptively to meet the " \
|
|
"the pause requirements.") \
|
|
\
|
|
product(size_t, G1ConcRSLogCacheSize, 10, \
|
|
"Log base 2 of the length of conc RS hot-card cache.") \
|
|
range(0, 27) \
|
|
\
|
|
product(uintx, G1ConcRSHotCardLimit, 4, \
|
|
"The threshold that defines (>=) a hot card.") \
|
|
range(0, max_jubyte) \
|
|
\
|
|
develop(intx, G1RSetRegionEntriesBase, 256, \
|
|
"Max number of regions in a fine-grain table per MB.") \
|
|
range(1, max_jint/wordSize) \
|
|
\
|
|
product(intx, G1RSetRegionEntries, 0, \
|
|
"Max number of regions for which we keep bitmaps." \
|
|
"Will be set ergonomically by default") \
|
|
range(0, max_jint/wordSize) \
|
|
constraint(G1RSetRegionEntriesConstraintFunc,AfterErgo) \
|
|
\
|
|
develop(intx, G1RSetSparseRegionEntriesBase, 4, \
|
|
"Max number of entries per region in a sparse table " \
|
|
"per MB.") \
|
|
range(1, max_jint/wordSize) \
|
|
\
|
|
product(intx, G1RSetSparseRegionEntries, 0, \
|
|
"Max number of entries per region in a sparse table." \
|
|
"Will be set ergonomically by default.") \
|
|
range(0, max_jint/wordSize) \
|
|
constraint(G1RSetSparseRegionEntriesConstraintFunc,AfterErgo) \
|
|
\
|
|
develop(intx, G1MaxVerifyFailures, -1, \
|
|
"The maximum number of verification failures to print. " \
|
|
"-1 means print all.") \
|
|
range(-1, max_jint) \
|
|
\
|
|
develop(bool, G1ScrubRemSets, true, \
|
|
"When true, do RS scrubbing after cleanup.") \
|
|
\
|
|
develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
|
|
"the number of regions for which we'll print a surv rate " \
|
|
"summary.") \
|
|
range(0, max_intx) \
|
|
constraint(G1YoungSurvRateNumRegionsSummaryConstraintFunc,AfterErgo)\
|
|
\
|
|
product(uintx, G1ReservePercent, 10, \
|
|
"It determines the minimum reserve we should have in the heap " \
|
|
"to minimize the probability of promotion failure.") \
|
|
range(0, 50) \
|
|
\
|
|
develop(bool, G1HRRSUseSparseTable, true, \
|
|
"When true, use sparse table to save space.") \
|
|
\
|
|
develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
|
|
"Forces flushing of log buffers before verification.") \
|
|
\
|
|
product(size_t, G1HeapRegionSize, 0, \
|
|
"Size of the G1 regions.") \
|
|
range(0, 32*M) \
|
|
constraint(G1HeapRegionSizeConstraintFunc,AfterMemoryInit) \
|
|
\
|
|
product(uintx, G1ConcRefinementThreads, 0, \
|
|
"If non-0 is the number of parallel rem set update threads, " \
|
|
"otherwise the value is determined ergonomically.") \
|
|
range(0, (max_jint-1)/wordSize) \
|
|
\
|
|
develop(bool, G1VerifyCTCleanup, false, \
|
|
"Verify card table cleanup.") \
|
|
\
|
|
product(size_t, G1RSetScanBlockSize, 64, \
|
|
"Size of a work unit of cards claimed by a worker thread" \
|
|
"during RSet scanning.") \
|
|
range(1, max_uintx) \
|
|
\
|
|
develop(uintx, G1SecondaryFreeListAppendLength, 5, \
|
|
"The number of regions we will add to the secondary free list " \
|
|
"at every append operation") \
|
|
\
|
|
develop(bool, G1StressConcRegionFreeing, false, \
|
|
"It stresses the concurrent region freeing operation") \
|
|
\
|
|
develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
|
|
"Artificial delay during concurrent region freeing") \
|
|
\
|
|
develop(uintx, G1DummyRegionsPerGC, 0, \
|
|
"The 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.") \
|
|
\
|
|
develop(bool, G1ExitOnExpansionFailure, false, \
|
|
"Raise a fatal VM exit out of memory failure in the event " \
|
|
" that heap expansion fails due to running out of swap.") \
|
|
\
|
|
experimental(uintx, G1MaxNewSizePercent, 60, \
|
|
"Percentage (0-100) of the heap size to use as default " \
|
|
" maximum young gen size.") \
|
|
range(0, 100) \
|
|
constraint(G1MaxNewSizePercentConstraintFunc,AfterErgo) \
|
|
\
|
|
experimental(uintx, G1NewSizePercent, 5, \
|
|
"Percentage (0-100) of the heap size to use as default " \
|
|
"minimum young gen size.") \
|
|
range(0, 100) \
|
|
constraint(G1NewSizePercentConstraintFunc,AfterErgo) \
|
|
\
|
|
experimental(uintx, G1MixedGCLiveThresholdPercent, 85, \
|
|
"Threshold for regions to be considered for inclusion in the " \
|
|
"collection set of mixed GCs. " \
|
|
"Regions with live bytes exceeding this will not be collected.") \
|
|
range(0, 100) \
|
|
\
|
|
product(uintx, G1HeapWastePercent, 5, \
|
|
"Amount of space, expressed as a percentage of the heap size, " \
|
|
"that G1 is willing not to collect to avoid expensive GCs.") \
|
|
range(0, 100) \
|
|
\
|
|
product(uintx, G1MixedGCCountTarget, 8, \
|
|
"The target number of mixed GCs after a marking cycle.") \
|
|
range(0, max_uintx) \
|
|
\
|
|
experimental(bool, G1EagerReclaimHumongousObjects, true, \
|
|
"Try to reclaim dead large objects at every young GC.") \
|
|
\
|
|
experimental(bool, G1EagerReclaimHumongousObjectsWithStaleRefs, true, \
|
|
"Try to reclaim dead large objects that have a few stale " \
|
|
"references at every young GC.") \
|
|
\
|
|
experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
|
|
"An upper bound for the number of old CSet regions expressed " \
|
|
"as a percentage of the heap size.") \
|
|
range(0, 100) \
|
|
\
|
|
notproduct(bool, G1EvacuationFailureALot, false, \
|
|
"Force use of evacuation failure handling during certain " \
|
|
"evacuation pauses") \
|
|
\
|
|
develop(uintx, G1EvacuationFailureALotCount, 1000, \
|
|
"Number of successful evacuations between evacuation failures " \
|
|
"occurring at object copying") \
|
|
\
|
|
develop(uintx, G1EvacuationFailureALotInterval, 5, \
|
|
"Total collections between forced triggering of evacuation " \
|
|
"failures") \
|
|
\
|
|
develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
|
|
"Force use of evacuation failure handling during evacuation " \
|
|
"pauses when marking is in progress") \
|
|
\
|
|
develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
|
|
"Force use of evacuation failure handling during initial mark " \
|
|
"evacuation pauses") \
|
|
\
|
|
develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
|
|
"Force use of evacuation failure handling during young " \
|
|
"evacuation pauses") \
|
|
\
|
|
develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
|
|
"Force use of evacuation failure handling during mixed " \
|
|
"evacuation pauses") \
|
|
\
|
|
diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \
|
|
"If true, perform verification of each heap region's " \
|
|
"remembered set when verifying the heap during a full GC.") \
|
|
\
|
|
diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \
|
|
"Verify the code root lists attached to each heap region.") \
|
|
\
|
|
develop(bool, G1VerifyBitmaps, false, \
|
|
"Verifies the consistency of the marking bitmaps")
|
|
|
|
G1_FLAGS(DECLARE_DEVELOPER_FLAG, \
|
|
DECLARE_PD_DEVELOPER_FLAG, \
|
|
DECLARE_PRODUCT_FLAG, \
|
|
DECLARE_PD_PRODUCT_FLAG, \
|
|
DECLARE_DIAGNOSTIC_FLAG, \
|
|
DECLARE_EXPERIMENTAL_FLAG, \
|
|
DECLARE_NOTPRODUCT_FLAG, \
|
|
DECLARE_MANAGEABLE_FLAG, \
|
|
DECLARE_PRODUCT_RW_FLAG, \
|
|
IGNORE_RANGE, \
|
|
IGNORE_CONSTRAINT)
|
|
|
|
#endif // SHARE_VM_GC_G1_G1_GLOBALS_HPP
|