| /* |
| * Copyright (c) 2001, 2011, 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 |
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| * |
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| |
| #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(intx, G1ConfidencePercent, 50, \ |
| "Confidence level for MMU/pause predictions") \ |
| \ |
| develop(intx, G1MarkingOverheadPercent, 0, \ |
| "Overhead of concurrent marking") \ |
| \ |
| develop(bool, G1Gen, true, \ |
| "If true, it will enable the generational G1") \ |
| \ |
| develop(intx, G1PolicyVerbose, 0, \ |
| "The verbosity level on G1 policy decisions") \ |
| \ |
| 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(intx, G1PausesBtwnConcMark, -1, \ |
| "If positive, fixed number of pauses between conc markings") \ |
| \ |
| 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(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
| "Size of the region stack for concurrent marking.") \ |
| \ |
| develop(bool, G1SATBBarrierPrintNullPreVals, false, \ |
| "If true, count frac of ptr writes with null pre-vals.") \ |
| \ |
| 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(intx, G1InitYoungSurvRatio, 50, \ |
| "Expected Survival Rate for newly allocated bytes") \ |
| \ |
| 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, G1PrintCTFilterStats, false, \ |
| "If true, print stats on RS filtering effectiveness") \ |
| \ |
| 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") \ |
| \ |
| develop(intx, G1PrintRegionLivenessInfo, 0, \ |
| "When > 0, print the occupancies of the <n> best and worst" \ |
| "regions.") \ |
| \ |
| develop(bool, G1PrintParCleanupStats, false, \ |
| "When true, print extra stats about parallel cleanup.") \ |
| \ |
| develop(bool, G1DisablePreBarrier, false, \ |
| "Disable generation of pre-barrier (i.e., marking barrier) ") \ |
| \ |
| develop(bool, G1DisablePostBarrier, false, \ |
| "Disable generation of post-barrier (i.e., RS barrier) ") \ |
| \ |
| 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(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(intx, 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") \ |
| \ |
| develop(bool, G1FixedTenuringThreshold, false, \ |
| "When set, G1 will not adjust the tenuring threshold") \ |
| \ |
| develop(bool, G1FixedEdenSize, false, \ |
| "When set, G1 will not allocate unused survivor space regions") \ |
| \ |
| develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
| "If non-0 is the size of the G1 survivor space, " \ |
| "otherwise SurvivorRatio is used to determine the size") \ |
| \ |
| 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(bool, ReduceInitialCardMarksForG1, false, \ |
| "When ReduceInitialCardMarks is true, this flag setting " \ |
| " controls whether G1 allows the RICM optimization") |
| |
| 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 |
