Mercurial > hg > openjdk > jigsaw > hotspot
view src/share/vm/gc_implementation/g1/g1_globals.hpp @ 4610:45c724e2b43a default tip
Merge
| author | mchung |
|---|---|
| date | Tue, 07 May 2013 17:14:42 -0700 |
| parents | f1fb03a251e9 22dec012dd3e |
| children |
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/* * Copyright (c) 2001, 2013, 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_IMPLEMENTATION_G1_G1_GLOBALS_HPP #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP #include "runtime/globals.hpp" // // 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) \ \ product(uintx, G1ConfidencePercent, 50, \ "Confidence level for MMU/pause predictions") \ \ develop(intx, G1MarkingOverheadPercent, 0, \ "Overhead of concurrent marking") \ \ develop(intx, G1MarkingVerboseLevel, 0, \ "Level (0-4) of verboseness of the marking code") \ \ develop(bool, G1PrintReachableAtInitialMark, false, \ "Reachable object dump at the initial mark pause") \ \ develop(bool, G1VerifyDuringGCPrintReachable, false, \ "If conc mark verification fails, dump reachable objects") \ \ develop(ccstr, G1PrintReachableBaseFile, NULL, \ "The base file name for the reachable object dumps") \ \ develop(bool, G1TraceMarkStackOverflow, false, \ "If true, extra debugging code for CM restart for ovflw.") \ \ develop(bool, G1TraceHeapRegionRememberedSet, false, \ "Enables heap region remembered set debug logs") \ \ diagnostic(bool, G1SummarizeConcMark, false, \ "Summarize concurrent mark info") \ \ diagnostic(bool, G1SummarizeRSetStats, false, \ "Summarize remembered set processing info") \ \ 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 -XX:+G1SummarizeRSetStats") \ \ diagnostic(bool, G1TraceConcRefinement, false, \ "Trace G1 concurrent refinement") \ \ product(double, G1ConcMarkStepDurationMillis, 10.0, \ "Target duration of individual concurrent marking steps " \ "in milliseconds.") \ \ product(intx, G1RefProcDrainInterval, 10, \ "The number of discovered reference objects to process before " \ "draining concurrent marking work queues.") \ \ experimental(bool, G1UseConcMarkReferenceProcessing, true, \ "If true, enable reference discovery during concurrent " \ "marking and reference processing at the end of remark.") \ \ product(intx, G1SATBBufferSize, 1*K, \ "Number of entries in an SATB log buffer.") \ \ develop(intx, G1SATBProcessCompletedThreshold, 20, \ "Number of completed buffers that triggers log processing.") \ \ 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.") \ \ develop(intx, G1ExtraRegionSurvRate, 33, \ "If the young survival rate is S, and there's room left in " \ "to-space, we will allow regions whose survival rate is up to " \ "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ \ develop(bool, G1SATBPrintStubs, false, \ "If true, print generated stubs for the SATB barrier") \ \ experimental(intx, G1ExpandByPercentOfAvailable, 20, \ "When expanding, % of uncommitted space to claim.") \ \ develop(bool, G1RSBarrierRegionFilter, true, \ "If true, generate region filtering code in RS barrier") \ \ develop(bool, G1RSBarrierNullFilter, true, \ "If true, generate null-pointer filtering code in RS barrier") \ \ develop(bool, G1DeferredRSUpdate, true, \ "If true, use deferred RS updates") \ \ develop(bool, G1RSLogCheckCardTable, false, \ "If true, verify that no dirty cards remain after RS log " \ "processing.") \ \ develop(bool, G1RSCountHisto, false, \ "If true, print a histogram of RS occupancies after each pause") \ \ diagnostic(bool, G1PrintRegionLivenessInfo, false, \ "Prints the liveness information for all regions in the heap " \ "at the end of a marking cycle.") \ \ product(intx, G1UpdateBufferSize, 256, \ "Size of an update buffer") \ \ product(intx, G1ConcRefinementYellowZone, 0, \ "Number of enqueued update buffers that will " \ "trigger concurrent processing. Will be selected ergonomically " \ "by default.") \ \ product(intx, 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.") \ \ product(intx, G1ConcRefinementGreenZone, 0, \ "The number of update buffers that are left in the queue by the " \ "concurrent processing threads. Will be selected ergonomically " \ "by default.") \ \ product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ "The last concurrent refinement thread wakes up every " \ "specified number of milliseconds to do miscellaneous work.") \ \ product(intx, 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.") \ \ product(intx, G1RSetUpdatingPauseTimePercent, 10, \ "A target percentage of time that is allowed to be spend on " \ "process RS update buffers during the collection pause.") \ \ product(bool, G1UseAdaptiveConcRefinement, true, \ "Select green, yellow and red zones adaptively to meet the " \ "the pause requirements.") \ \ develop(intx, G1ConcRSLogCacheSize, 10, \ "Log base 2 of the length of conc RS hot-card cache.") \ \ develop(intx, G1ConcRSHotCardLimit, 4, \ "The threshold that defines (>=) a hot card.") \ \ develop(intx, G1MaxHotCardCountSizePercent, 25, \ "The maximum size of the hot card count cache as a " \ "percentage of the number of cards for the maximum heap.") \ \ develop(bool, G1PrintOopAppls, false, \ "When true, print applications of closures to external locs.") \ \ develop(intx, G1RSetRegionEntriesBase, 256, \ "Max number of regions in a fine-grain table per MB.") \ \ product(intx, G1RSetRegionEntries, 0, \ "Max number of regions for which we keep bitmaps." \ "Will be set ergonomically by default") \ \ develop(intx, G1RSetSparseRegionEntriesBase, 4, \ "Max number of entries per region in a sparse table " \ "per MB.") \ \ product(intx, G1RSetSparseRegionEntries, 0, \ "Max number of entries per region in a sparse table." \ "Will be set ergonomically by default.") \ \ develop(bool, G1RecordHRRSOops, false, \ "When true, record recent calls to rem set operations.") \ \ develop(bool, G1RecordHRRSEvents, false, \ "When true, record recent calls to rem set operations.") \ \ develop(intx, G1MaxVerifyFailures, -1, \ "The maximum number of verification failrues to print. " \ "-1 means print all.") \ \ develop(bool, G1ScrubRemSets, true, \ "When true, do RS scrubbing after cleanup.") \ \ develop(bool, G1RSScrubVerbose, false, \ "When true, do RS scrubbing with verbose output.") \ \ develop(bool, G1YoungSurvRateVerbose, false, \ "print out the survival rate of young regions according to age.") \ \ develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ "the number of regions for which we'll print a surv rate " \ "summary.") \ \ product(uintx, G1ReservePercent, 10, \ "It determines the minimum reserve we should have in the heap " \ "to minimize the probability of promotion failure.") \ \ diagnostic(bool, G1PrintHeapRegions, false, \ "If set G1 will print information on which regions are being " \ "allocated and which are reclaimed.") \ \ develop(bool, G1HRRSUseSparseTable, true, \ "When true, use sparse table to save space.") \ \ develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ "Forces flushing of log buffers before verification.") \ \ develop(bool, G1FailOnFPError, false, \ "When set, G1 will fail when it encounters an FP 'error', " \ "so as to allow debugging") \ \ product(uintx, G1HeapRegionSize, 0, \ "Size of the G1 regions.") \ \ experimental(bool, G1UseParallelRSetUpdating, true, \ "Enables the parallelization of remembered set updating " \ "during evacuation pauses") \ \ experimental(bool, G1UseParallelRSetScanning, true, \ "Enables the parallelization of remembered set scanning " \ "during evacuation pauses") \ \ product(uintx, G1ConcRefinementThreads, 0, \ "If non-0 is the number of parallel rem set update threads, " \ "otherwise the value is determined ergonomically.") \ \ develop(intx, G1CardCountCacheExpandThreshold, 16, \ "Expand the card count cache if the number of collisions for " \ "a particular entry exceeds this value.") \ \ develop(bool, G1VerifyCTCleanup, false, \ "Verify card table cleanup.") \ \ product(uintx, G1RSetScanBlockSize, 64, \ "Size of a work unit of cards claimed by a worker thread" \ "during RSet scanning.") \ \ develop(uintx, G1SecondaryFreeListAppendLength, 5, \ "The number of regions we will add to the secondary free list " \ "at every append operation") \ \ develop(bool, G1ConcRegionFreeingVerbose, false, \ "Enables verboseness during concurrent region freeing") \ \ 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.") \ \ develop(uintx, G1ConcMarkForceOverflow, 0, \ "The number of times we'll force an overflow during " \ "concurrent marking") \ \ experimental(uintx, G1NewSizePercent, 5, \ "Percentage (0-100) of the heap size to use as default " \ "minimum young gen size.") \ \ experimental(uintx, G1MaxNewSizePercent, 60, \ "Percentage (0-100) of the heap size to use as default " \ " maximum young gen size.") \ \ experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \ "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.") \ \ product(uintx, G1HeapWastePercent, 10, \ "Amount of space, expressed as a percentage of the heap size, " \ "that G1 is willing not to collect to avoid expensive GCs.") \ \ product(uintx, G1MixedGCCountTarget, 8, \ "The target number of mixed GCs after a marking cycle.") \ \ experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \ "An upper bound for the number of old CSet regions expressed " \ "as a percentage of the heap size.") \ \ experimental(ccstr, G1LogLevel, NULL, \ "Log level for G1 logging: fine, finer, finest") \ \ 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") 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) #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP