288 lines
21 KiB
C++
288 lines
21 KiB
C++
/*
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* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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//
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// Defines all globals flags used by the garbage-first compiler.
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//
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#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
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\
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product(intx, G1ConfidencePercent, 50, \
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"Confidence level for MMU/pause predictions") \
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\
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develop(intx, G1MarkingOverheadPercent, 0, \
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"Overhead of concurrent marking") \
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\
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develop(bool, G1Gen, true, \
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"If true, it will enable the generational G1") \
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\
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develop(intx, G1PolicyVerbose, 0, \
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"The verbosity level on G1 policy decisions") \
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\
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develop(bool, G1UseHRIntoRS, true, \
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"Determines whether the 'advanced' HR Into rem set is used.") \
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\
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develop(intx, G1MarkingVerboseLevel, 0, \
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"Level (0-4) of verboseness of the marking code") \
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\
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develop(bool, G1PrintReachableAtInitialMark, false, \
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"Reachable object dump at the initial mark pause") \
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\
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develop(bool, G1VerifyDuringGCPrintReachable, false, \
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"If conc mark verification fails, dump reachable objects") \
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\
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develop(ccstr, G1PrintReachableBaseFile, NULL, \
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"The base file name for the reachable object dumps") \
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\
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develop(bool, G1TraceMarkStackOverflow, false, \
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"If true, extra debugging code for CM restart for ovflw.") \
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\
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develop(intx, G1PausesBtwnConcMark, -1, \
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"If positive, fixed number of pauses between conc markings") \
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\
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diagnostic(bool, G1SummarizeConcMark, false, \
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"Summarize concurrent mark info") \
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\
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diagnostic(bool, G1SummarizeRSetStats, false, \
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"Summarize remembered set processing info") \
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\
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diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
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"The period (in number of GCs) at which we will generate " \
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"update buffer processing info " \
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"(0 means do not periodically generate this info); " \
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"it also requires -XX:+G1SummarizeRSetStats") \
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\
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diagnostic(bool, G1SummarizeZFStats, false, \
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"Summarize zero-filling info") \
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\
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diagnostic(bool, G1TraceConcRefinement, false, \
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"Trace G1 concurrent refinement") \
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\
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product(intx, G1MarkRegionStackSize, 1024 * 1024, \
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"Size of the region stack for concurrent marking.") \
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\
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develop(bool, G1ConcZeroFill, true, \
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"If true, run concurrent zero-filling thread") \
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\
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develop(intx, G1ConcZFMaxRegions, 1, \
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"Stop zero-filling when # of zf'd regions reaches") \
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\
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develop(bool, G1SATBBarrierPrintNullPreVals, false, \
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"If true, count frac of ptr writes with null pre-vals.") \
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\
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product(intx, G1SATBBufferSize, 1*K, \
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"Number of entries in an SATB log buffer.") \
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\
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develop(intx, G1SATBProcessCompletedThreshold, 20, \
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"Number of completed buffers that triggers log processing.") \
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\
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develop(intx, G1ExtraRegionSurvRate, 33, \
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"If the young survival rate is S, and there's room left in " \
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"to-space, we will allow regions whose survival rate is up to " \
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"S + (1 - S)*X, where X is this parameter (as a fraction.)") \
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\
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develop(intx, G1InitYoungSurvRatio, 50, \
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"Expected Survival Rate for newly allocated bytes") \
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\
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develop(bool, G1SATBPrintStubs, false, \
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"If true, print generated stubs for the SATB barrier") \
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\
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experimental(intx, G1ExpandByPercentOfAvailable, 20, \
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"When expanding, % of uncommitted space to claim.") \
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\
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develop(bool, G1RSBarrierRegionFilter, true, \
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"If true, generate region filtering code in RS barrier") \
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\
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develop(bool, G1RSBarrierNullFilter, true, \
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"If true, generate null-pointer filtering code in RS barrier") \
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\
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develop(bool, G1PrintCTFilterStats, false, \
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"If true, print stats on RS filtering effectiveness") \
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\
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develop(bool, G1DeferredRSUpdate, true, \
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"If true, use deferred RS updates") \
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\
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develop(bool, G1RSLogCheckCardTable, false, \
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"If true, verify that no dirty cards remain after RS log " \
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"processing.") \
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\
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develop(bool, G1RSCountHisto, false, \
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"If true, print a histogram of RS occupancies after each pause") \
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\
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develop(intx, G1PrintRegionLivenessInfo, 0, \
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"When > 0, print the occupancies of the <n> best and worst" \
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"regions.") \
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\
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develop(bool, G1PrintParCleanupStats, false, \
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"When true, print extra stats about parallel cleanup.") \
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\
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develop(bool, G1DisablePreBarrier, false, \
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"Disable generation of pre-barrier (i.e., marking barrier) ") \
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\
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develop(bool, G1DisablePostBarrier, false, \
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"Disable generation of post-barrier (i.e., RS barrier) ") \
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\
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product(intx, G1UpdateBufferSize, 256, \
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"Size of an update buffer") \
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\
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product(intx, G1ConcRefinementYellowZone, 0, \
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"Number of enqueued update buffers that will " \
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"trigger concurrent processing. Will be selected ergonomically " \
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"by default.") \
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\
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product(intx, G1ConcRefinementRedZone, 0, \
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"Maximum number of enqueued update buffers before mutator " \
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"threads start processing new ones instead of enqueueing them. " \
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"Will be selected ergonomically by default. Zero will disable " \
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"concurrent processing.") \
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\
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product(intx, G1ConcRefinementGreenZone, 0, \
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"The number of update buffers that are left in the queue by the " \
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"concurrent processing threads. Will be selected ergonomically " \
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"by default.") \
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\
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product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
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"The last concurrent refinement thread wakes up every " \
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"specified number of milliseconds to do miscellaneous work.") \
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\
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product(intx, G1ConcRefinementThresholdStep, 0, \
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"Each time the rset update queue increases by this amount " \
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"activate the next refinement thread if available. " \
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"Will be selected ergonomically by default.") \
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\
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product(intx, G1RSetUpdatingPauseTimePercent, 10, \
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"A target percentage of time that is allowed to be spend on " \
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"process RS update buffers during the collection pause.") \
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\
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product(bool, G1UseAdaptiveConcRefinement, true, \
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"Select green, yellow and red zones adaptively to meet the " \
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"the pause requirements.") \
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\
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develop(intx, G1ConcRSLogCacheSize, 10, \
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"Log base 2 of the length of conc RS hot-card cache.") \
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\
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develop(intx, G1ConcRSHotCardLimit, 4, \
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"The threshold that defines (>=) a hot card.") \
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\
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develop(bool, G1PrintOopAppls, false, \
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"When true, print applications of closures to external locs.") \
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\
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develop(intx, G1RSetRegionEntriesBase, 256, \
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"Max number of regions in a fine-grain table per MB.") \
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\
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product(intx, G1RSetRegionEntries, 0, \
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"Max number of regions for which we keep bitmaps." \
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"Will be set ergonomically by default") \
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\
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develop(intx, G1RSetSparseRegionEntriesBase, 4, \
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"Max number of entries per region in a sparse table " \
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"per MB.") \
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\
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product(intx, G1RSetSparseRegionEntries, 0, \
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"Max number of entries per region in a sparse table." \
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"Will be set ergonomically by default.") \
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\
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develop(bool, G1RecordHRRSOops, false, \
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"When true, record recent calls to rem set operations.") \
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\
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develop(bool, G1RecordHRRSEvents, false, \
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"When true, record recent calls to rem set operations.") \
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\
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develop(intx, G1MaxVerifyFailures, -1, \
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"The maximum number of verification failrues to print. " \
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"-1 means print all.") \
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\
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develop(bool, G1ScrubRemSets, true, \
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"When true, do RS scrubbing after cleanup.") \
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\
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develop(bool, G1RSScrubVerbose, false, \
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"When true, do RS scrubbing with verbose output.") \
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\
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develop(bool, G1YoungSurvRateVerbose, false, \
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"print out the survival rate of young regions according to age.") \
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\
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develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
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"the number of regions for which we'll print a surv rate " \
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"summary.") \
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\
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product(intx, G1ReservePercent, 10, \
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"It determines the minimum reserve we should have in the heap " \
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"to minimize the probability of promotion failure.") \
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\
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diagnostic(bool, G1PrintHeapRegions, false, \
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"If set G1 will print information on which regions are being " \
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"allocated and which are reclaimed.") \
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\
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develop(bool, G1HRRSUseSparseTable, true, \
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"When true, use sparse table to save space.") \
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\
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develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
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"Forces flushing of log buffers before verification.") \
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\
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develop(bool, G1FailOnFPError, false, \
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"When set, G1 will fail when it encounters an FP 'error', " \
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"so as to allow debugging") \
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\
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develop(bool, G1FixedTenuringThreshold, false, \
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"When set, G1 will not adjust the tenuring threshold") \
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\
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develop(bool, G1FixedEdenSize, false, \
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"When set, G1 will not allocate unused survivor space regions") \
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\
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develop(uintx, G1FixedSurvivorSpaceSize, 0, \
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"If non-0 is the size of the G1 survivor space, " \
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"otherwise SurvivorRatio is used to determine the size") \
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\
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product(uintx, G1HeapRegionSize, 0, \
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"Size of the G1 regions.") \
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\
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experimental(bool, G1UseParallelRSetUpdating, true, \
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"Enables the parallelization of remembered set updating " \
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"during evacuation pauses") \
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\
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experimental(bool, G1UseParallelRSetScanning, true, \
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"Enables the parallelization of remembered set scanning " \
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"during evacuation pauses") \
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\
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product(uintx, G1ConcRefinementThreads, 0, \
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"If non-0 is the number of parallel rem set update threads, " \
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"otherwise the value is determined ergonomically.") \
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\
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develop(intx, G1CardCountCacheExpandThreshold, 16, \
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"Expand the card count cache if the number of collisions for " \
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"a particular entry exceeds this value.") \
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\
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develop(bool, G1VerifyCTCleanup, false, \
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"Verify card table cleanup.") \
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\
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product(uintx, G1RSetScanBlockSize, 64, \
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"Size of a work unit of cards claimed by a worker thread" \
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"during RSet scanning.") \
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\
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develop(bool, ReduceInitialCardMarksForG1, false, \
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"When ReduceInitialCardMarks is true, this flag setting " \
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" controls whether G1 allows the RICM optimization")
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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)
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