ysr@777: /* xdono@1014: * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. ysr@777: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. ysr@777: * ysr@777: * This code is free software; you can redistribute it and/or modify it ysr@777: * under the terms of the GNU General Public License version 2 only, as ysr@777: * published by the Free Software Foundation. ysr@777: * ysr@777: * This code is distributed in the hope that it will be useful, but WITHOUT ysr@777: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ysr@777: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ysr@777: * version 2 for more details (a copy is included in the LICENSE file that ysr@777: * accompanied this code). ysr@777: * ysr@777: * You should have received a copy of the GNU General Public License version ysr@777: * 2 along with this work; if not, write to the Free Software Foundation, ysr@777: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. ysr@777: * ysr@777: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, ysr@777: * CA 95054 USA or visit www.sun.com if you need additional information or ysr@777: * have any questions. ysr@777: * ysr@777: */ ysr@777: ysr@777: // ysr@777: // Defines all globals flags used by the garbage-first compiler. ysr@777: // ysr@777: ysr@785: #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \ ysr@777: \ johnc@1186: product(intx, G1ParallelGCAllocBufferSize, 8*K, \ ysr@777: "Size of parallel G1 allocation buffers in to-space.") \ ysr@777: \ johnc@1186: product(intx, G1ConfidencePercent, 50, \ ysr@777: "Confidence level for MMU/pause predictions") \ ysr@777: \ tonyp@1319: develop(intx, G1MarkingOverheadPercent, 0, \ ysr@777: "Overhead of concurrent marking") \ ysr@777: \ ysr@777: product(intx, G1YoungGenSize, 0, \ ysr@777: "Size of the G1 young generation, 0 is the adaptive policy") \ ysr@777: \ johnc@1186: develop(bool, G1Gen, true, \ ysr@777: "If true, it will enable the generational G1") \ ysr@777: \ tonyp@1319: develop(intx, G1GCPercent, 10, \ ysr@777: "The desired percent time spent on GC") \ ysr@777: \ johnc@1186: develop(intx, G1PolicyVerbose, 0, \ ysr@777: "The verbosity level on G1 policy decisions") \ ysr@777: \ ysr@777: develop(bool, G1UseHRIntoRS, true, \ ysr@777: "Determines whether the 'advanced' HR Into rem set is used.") \ ysr@777: \ ysr@777: develop(intx, G1MarkingVerboseLevel, 0, \ ysr@777: "Level (0-4) of verboseness of the marking code") \ ysr@777: \ tonyp@1180: develop(bool, G1VerifyConcMarkPrintReachable, false, \ ysr@777: "If conc mark verification fails, print reachable objects") \ ysr@777: \ ysr@777: develop(bool, G1TraceMarkStackOverflow, false, \ ysr@777: "If true, extra debugging code for CM restart for ovflw.") \ ysr@777: \ ysr@777: develop(intx, G1PausesBtwnConcMark, -1, \ ysr@777: "If positive, fixed number of pauses between conc markings") \ ysr@777: \ johnc@1186: diagnostic(bool, G1SummarizeConcurrentMark, false, \ ysr@777: "Summarize concurrent mark info") \ ysr@777: \ johnc@1186: diagnostic(bool, G1SummarizeRSetStats, false, \ ysr@777: "Summarize remembered set processing info") \ ysr@777: \ tonyp@1319: diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ tonyp@1319: "The period (in number of GCs) at which we will generate " \ tonyp@1319: "update buffer processing info " \ tonyp@1319: "(0 means do not periodically generate this info); " \ tonyp@1319: "it also requires -XX:+G1SummarizeRSetStats") \ tonyp@1319: \ johnc@1186: diagnostic(bool, G1SummarizeZFStats, false, \ ysr@777: "Summarize zero-filling info") \ ysr@777: \ johnc@1186: develop(bool, G1TraceConcurrentRefinement, false, \ ysr@777: "Trace G1 concurrent refinement") \ ysr@777: \ johnc@1186: product(intx, G1MarkStackSize, 2 * 1024 * 1024, \ ysr@777: "Size of the mark stack for concurrent marking.") \ ysr@777: \ johnc@1186: product(intx, G1MarkRegionStackSize, 1024 * 1024, \ ysr@777: "Size of the region stack for concurrent marking.") \ ysr@777: \ ysr@777: develop(bool, G1ConcRefine, true, \ ysr@777: "If true, run concurrent rem set refinement for G1") \ ysr@777: \ ysr@777: develop(intx, G1ConcRefineTargTraversals, 4, \ ysr@777: "Number of concurrent refinement we try to achieve") \ ysr@777: \ ysr@777: develop(intx, G1ConcRefineInitialDelta, 4, \ ysr@777: "Number of heap regions of alloc ahead of starting collection " \ ysr@777: "pause to start concurrent refinement (initially)") \ ysr@777: \ johnc@1186: develop(bool, G1SmoothConcRefine, true, \ ysr@777: "Attempts to smooth out the overhead of concurrent refinement") \ ysr@777: \ ysr@777: develop(bool, G1ConcZeroFill, true, \ ysr@777: "If true, run concurrent zero-filling thread") \ ysr@777: \ ysr@777: develop(intx, G1ConcZFMaxRegions, 1, \ ysr@777: "Stop zero-filling when # of zf'd regions reaches") \ ysr@777: \ ysr@777: product(intx, G1SteadyStateUsed, 90, \ ysr@777: "If non-0, try to maintain 'used' at this pct (of max)") \ ysr@777: \ ysr@777: product(intx, G1SteadyStateUsedDelta, 30, \ ysr@777: "If G1SteadyStateUsed is non-0, then do pause this number of " \ ysr@777: "of percentage points earlier if no marking is in progress.") \ ysr@777: \ ysr@777: develop(bool, G1SATBBarrierPrintNullPreVals, false, \ ysr@777: "If true, count frac of ptr writes with null pre-vals.") \ ysr@777: \ ysr@777: product(intx, G1SATBLogBufferSize, 1*K, \ ysr@777: "Number of entries in an SATB log buffer.") \ ysr@777: \ ysr@777: product(intx, G1SATBProcessCompletedThreshold, 20, \ ysr@777: "Number of completed buffers that triggers log processing.") \ ysr@777: \ ysr@777: develop(intx, G1ExtraRegionSurvRate, 33, \ ysr@777: "If the young survival rate is S, and there's room left in " \ ysr@777: "to-space, we will allow regions whose survival rate is up to " \ ysr@777: "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ ysr@777: \ ysr@777: develop(intx, G1InitYoungSurvRatio, 50, \ ysr@777: "Expected Survival Rate for newly allocated bytes") \ ysr@777: \ ysr@777: develop(bool, G1SATBPrintStubs, false, \ ysr@777: "If true, print generated stubs for the SATB barrier") \ ysr@777: \ johnc@1186: product(intx, G1ExpandByPercentOfAvailable, 20, \ ysr@777: "When expanding, % of uncommitted space to claim.") \ ysr@777: \ ysr@777: develop(bool, G1RSBarrierRegionFilter, true, \ ysr@777: "If true, generate region filtering code in RS barrier") \ ysr@777: \ ysr@777: develop(bool, G1RSBarrierNullFilter, true, \ ysr@777: "If true, generate null-pointer filtering code in RS barrier") \ ysr@777: \ ysr@777: develop(bool, G1PrintCTFilterStats, false, \ ysr@777: "If true, print stats on RS filtering effectiveness") \ ysr@777: \ iveresov@1051: develop(bool, G1DeferredRSUpdate, true, \ iveresov@1051: "If true, use deferred RS updates") \ iveresov@1051: \ ysr@777: develop(bool, G1RSLogCheckCardTable, false, \ ysr@777: "If true, verify that no dirty cards remain after RS log " \ ysr@777: "processing.") \ ysr@777: \ ysr@777: develop(bool, G1RSCountHisto, false, \ ysr@777: "If true, print a histogram of RS occupancies after each pause") \ ysr@777: \ ysr@777: develop(intx, G1PrintRegionLivenessInfo, 0, \ ysr@777: "When > 0, print the occupancies of the best and worst" \ ysr@777: "regions.") \ ysr@777: \ ysr@777: develop(bool, G1PrintParCleanupStats, false, \ ysr@777: "When true, print extra stats about parallel cleanup.") \ ysr@777: \ ysr@777: develop(bool, G1DisablePreBarrier, false, \ ysr@777: "Disable generation of pre-barrier (i.e., marking barrier) ") \ ysr@777: \ ysr@777: develop(bool, G1DisablePostBarrier, false, \ ysr@777: "Disable generation of post-barrier (i.e., RS barrier) ") \ ysr@777: \ tonyp@1318: product(intx, G1UpdateBufferSize, 256, \ tonyp@1318: "Size of an update buffer") \ tonyp@1318: \ tonyp@1318: product(intx, G1UpdateBufferQueueProcessingThreshold, 5, \ tonyp@1318: "Number of enqueued update buffers that will " \ tonyp@1318: "trigger concurrent processing") \ tonyp@1318: \ tonyp@1318: product(intx, G1UpdateBufferQueueMaxLength, 30, \ tonyp@1318: "Maximum number of enqueued update buffers before mutator " \ tonyp@1318: "threads start processing new ones instead of enqueueing them") \ ysr@777: \ ysr@777: develop(intx, G1ConcRSLogCacheSize, 10, \ ysr@777: "Log base 2 of the length of conc RS hot-card cache.") \ ysr@777: \ johnc@1186: develop(intx, G1ConcRSHotCardLimit, 4, \ ysr@777: "The threshold that defines (>=) a hot card.") \ ysr@777: \ ysr@777: develop(bool, G1PrintOopAppls, false, \ ysr@777: "When true, print applications of closures to external locs.") \ ysr@777: \ johnc@1186: develop(intx, G1LogRSRegionEntries, 7, \ ysr@777: "Log_2 of max number of regions for which we keep bitmaps.") \ ysr@777: \ ysr@777: develop(bool, G1RecordHRRSOops, false, \ ysr@777: "When true, record recent calls to rem set operations.") \ ysr@777: \ ysr@777: develop(bool, G1RecordHRRSEvents, false, \ ysr@777: "When true, record recent calls to rem set operations.") \ ysr@777: \ ysr@777: develop(intx, G1MaxVerifyFailures, -1, \ ysr@777: "The maximum number of verification failrues to print. " \ ysr@777: "-1 means print all.") \ ysr@777: \ ysr@777: develop(bool, G1ScrubRemSets, true, \ ysr@777: "When true, do RS scrubbing after cleanup.") \ ysr@777: \ ysr@777: develop(bool, G1RSScrubVerbose, false, \ ysr@777: "When true, do RS scrubbing with verbose output.") \ ysr@777: \ ysr@777: develop(bool, G1YoungSurvRateVerbose, false, \ ysr@777: "print out the survival rate of young regions according to age.") \ ysr@777: \ ysr@777: develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ ysr@777: "the number of regions for which we'll print a surv rate " \ ysr@777: "summary.") \ ysr@777: \ ysr@777: product(bool, G1UseScanOnlyPrefix, false, \ ysr@777: "It determines whether the system will calculate an optimum " \ ysr@777: "scan-only set.") \ ysr@777: \ johnc@1186: product(intx, G1MinReservePercent, 10, \ ysr@777: "It determines the minimum reserve we should have in the heap " \ ysr@777: "to minimize the probability of promotion failure.") \ ysr@777: \ johnc@1186: diagnostic(bool, G1PrintRegions, false, \ ysr@777: "If set G1 will print information on which regions are being " \ ysr@777: "allocated and which are reclaimed.") \ ysr@777: \ ysr@777: develop(bool, G1HRRSUseSparseTable, true, \ ysr@777: "When true, use sparse table to save space.") \ ysr@777: \ ysr@777: develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ ysr@777: "Forces flushing of log buffers before verification.") \ ysr@777: \ johnc@1186: product(bool, G1UseSurvivorSpaces, true, \ apetrusenko@980: "When true, use survivor space.") \ apetrusenko@980: \ johnc@1186: develop(bool, G1FixedTenuringThreshold, false, \ apetrusenko@980: "When set, G1 will not adjust the tenuring threshold") \ apetrusenko@980: \ johnc@1186: develop(bool, G1FixedEdenSize, false, \ apetrusenko@980: "When set, G1 will not allocate unused survivor space regions") \ apetrusenko@980: \ johnc@1186: develop(uintx, G1FixedSurvivorSpaceSize, 0, \ apetrusenko@980: "If non-0 is the size of the G1 survivor space, " \ tonyp@1073: "otherwise SurvivorRatio is used to determine the size") \ tonyp@1073: \ johnc@1186: experimental(bool, G1ParallelRSetUpdatingEnabled, false, \ tonyp@1073: "Enables the parallelization of remembered set updating " \ tonyp@1073: "during evacuation pauses") \ tonyp@1073: \ johnc@1186: experimental(bool, G1ParallelRSetScanningEnabled, false, \ tonyp@1073: "Enables the parallelization of remembered set scanning " \ iveresov@1229: "during evacuation pauses") \ iveresov@1229: \ iveresov@1229: product(uintx, G1ParallelRSetThreads, 0, \ iveresov@1229: "If non-0 is the number of parallel rem set update threads, " \ johnc@1325: "otherwise the value is determined ergonomically.") \ johnc@1325: \ johnc@1325: develop(intx, G1CardCountCacheExpandThreshold, 16, \ johnc@1325: "Expand the card count cache if the number of collisions for " \ johnc@1325: "a particular entry exceeds this value.") ysr@777: ysr@785: 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)