ysr@777: /* tonyp@2469: * Copyright (c) 2001, 2011, Oracle and/or its affiliates. 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: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. ysr@777: * ysr@777: */ ysr@777: stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP stefank@2314: stefank@2314: #include "runtime/globals.hpp" stefank@2314: 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, 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: \ johnc@1186: develop(intx, G1PolicyVerbose, 0, \ ysr@777: "The verbosity level on G1 policy decisions") \ ysr@777: \ ysr@777: develop(intx, G1MarkingVerboseLevel, 0, \ ysr@777: "Level (0-4) of verboseness of the marking code") \ ysr@777: \ tonyp@1479: develop(bool, G1PrintReachableAtInitialMark, false, \ tonyp@1479: "Reachable object dump at the initial mark pause") \ tonyp@1479: \ tonyp@1479: develop(bool, G1VerifyDuringGCPrintReachable, false, \ tonyp@1479: "If conc mark verification fails, dump reachable objects") \ tonyp@1479: \ tonyp@1479: develop(ccstr, G1PrintReachableBaseFile, NULL, \ tonyp@1479: "The base file name for the reachable object dumps") \ 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: \ tonyp@1717: diagnostic(bool, G1SummarizeConcMark, 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: \ tonyp@1717: diagnostic(bool, G1TraceConcRefinement, false, \ ysr@777: "Trace G1 concurrent refinement") \ ysr@777: \ johnc@1186: product(intx, G1MarkRegionStackSize, 1024 * 1024, \ ysr@777: "Size of the region stack for concurrent marking.") \ ysr@777: \ johnc@2494: product(double, G1ConcMarkStepDurationMillis, 10.0, \ johnc@2494: "Target duration of individual concurrent marking steps " \ johnc@2494: "in milliseconds.") \ johnc@2494: \ johnc@2494: product(intx, G1RefProcDrainInterval, 10, \ johnc@2494: "The number of discovered reference objects to process before " \ johnc@2494: "draining concurrent marking work queues.") \ johnc@2494: \ johnc@2781: experimental(bool, G1UseConcMarkReferenceProcessing, true, \ johnc@2718: "If true, enable reference discovery during concurrent " \ johnc@2781: "marking and reference processing at the end of remark.") \ ysr@777: \ tonyp@1717: product(intx, G1SATBBufferSize, 1*K, \ ysr@777: "Number of entries in an SATB log buffer.") \ ysr@777: \ tonyp@1717: develop(intx, G1SATBProcessCompletedThreshold, 20, \ ysr@777: "Number of completed buffers that triggers log processing.") \ ysr@777: \ tonyp@2469: product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ tonyp@2469: "Before enqueueing them, each mutator thread tries to do some " \ tonyp@2469: "filtering on the SATB buffers it generates. If post-filtering " \ tonyp@2469: "the percentage of retained entries is over this threshold " \ tonyp@2469: "the buffer will be enqueued for processing. A value of 0 " \ tonyp@2469: "specifies that mutator threads should not do such filtering.") \ tonyp@2469: \ 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: \ tonyp@1717: experimental(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: \ 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: \ tonyp@3121: diagnostic(bool, G1PrintRegionLivenessInfo, false, \ tonyp@3121: "Prints the liveness information for all regions in the heap " \ tonyp@3121: "at the end of a marking cycle.") \ ysr@777: \ ysr@777: develop(bool, G1PrintParCleanupStats, false, \ ysr@777: "When true, print extra stats about parallel cleanup.") \ ysr@777: \ tonyp@1318: product(intx, G1UpdateBufferSize, 256, \ tonyp@1318: "Size of an update buffer") \ tonyp@1318: \ tonyp@1717: product(intx, G1ConcRefinementYellowZone, 0, \ tonyp@1318: "Number of enqueued update buffers that will " \ iveresov@1546: "trigger concurrent processing. Will be selected ergonomically " \ iveresov@1546: "by default.") \ tonyp@1318: \ tonyp@1717: product(intx, G1ConcRefinementRedZone, 0, \ tonyp@1318: "Maximum number of enqueued update buffers before mutator " \ iveresov@1546: "threads start processing new ones instead of enqueueing them. " \ iveresov@1546: "Will be selected ergonomically by default. Zero will disable " \ iveresov@1546: "concurrent processing.") \ iveresov@1546: \ tonyp@1717: product(intx, G1ConcRefinementGreenZone, 0, \ iveresov@1546: "The number of update buffers that are left in the queue by the " \ iveresov@1546: "concurrent processing threads. Will be selected ergonomically " \ iveresov@1546: "by default.") \ iveresov@1546: \ tonyp@1717: product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ iveresov@1546: "The last concurrent refinement thread wakes up every " \ iveresov@1546: "specified number of milliseconds to do miscellaneous work.") \ iveresov@1546: \ tonyp@1717: product(intx, G1ConcRefinementThresholdStep, 0, \ iveresov@1546: "Each time the rset update queue increases by this amount " \ iveresov@1546: "activate the next refinement thread if available. " \ iveresov@1546: "Will be selected ergonomically by default.") \ iveresov@1546: \ tonyp@1717: product(intx, G1RSetUpdatingPauseTimePercent, 10, \ iveresov@1546: "A target percentage of time that is allowed to be spend on " \ iveresov@1546: "process RS update buffers during the collection pause.") \ iveresov@1546: \ tonyp@1717: product(bool, G1UseAdaptiveConcRefinement, true, \ iveresov@1546: "Select green, yellow and red zones adaptively to meet the " \ iveresov@1546: "the pause requirements.") \ 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: \ johnc@2713: develop(intx, G1MaxHotCardCountSizePercent, 25, \ johnc@2713: "The maximum size of the hot card count cache as a " \ johnc@2713: "percentage of the number of cards for the maximum heap.") \ johnc@2713: \ ysr@777: develop(bool, G1PrintOopAppls, false, \ ysr@777: "When true, print applications of closures to external locs.") \ ysr@777: \ iveresov@1696: develop(intx, G1RSetRegionEntriesBase, 256, \ iveresov@1696: "Max number of regions in a fine-grain table per MB.") \ iveresov@1696: \ iveresov@1696: product(intx, G1RSetRegionEntries, 0, \ iveresov@1696: "Max number of regions for which we keep bitmaps." \ iveresov@1696: "Will be set ergonomically by default") \ iveresov@1696: \ iveresov@1696: develop(intx, G1RSetSparseRegionEntriesBase, 4, \ iveresov@1696: "Max number of entries per region in a sparse table " \ iveresov@1696: "per MB.") \ iveresov@1696: \ iveresov@1696: product(intx, G1RSetSparseRegionEntries, 0, \ iveresov@1696: "Max number of entries per region in a sparse table." \ iveresov@1696: "Will be set ergonomically by default.") \ 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: \ tonyp@3119: product(uintx, G1ReservePercent, 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: \ tonyp@1717: diagnostic(bool, G1PrintHeapRegions, 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: \ ysr@1522: develop(bool, G1FailOnFPError, false, \ ysr@1522: "When set, G1 will fail when it encounters an FP 'error', " \ ysr@1522: "so as to allow debugging") \ ysr@1522: \ tonyp@1377: product(uintx, G1HeapRegionSize, 0, \ tonyp@1377: "Size of the G1 regions.") \ tonyp@1377: \ tonyp@1792: experimental(bool, G1UseParallelRSetUpdating, true, \ tonyp@1073: "Enables the parallelization of remembered set updating " \ tonyp@1073: "during evacuation pauses") \ tonyp@1073: \ tonyp@1792: experimental(bool, G1UseParallelRSetScanning, true, \ tonyp@1073: "Enables the parallelization of remembered set scanning " \ iveresov@1229: "during evacuation pauses") \ iveresov@1229: \ tonyp@1717: product(uintx, G1ConcRefinementThreads, 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 " \ apetrusenko@1375: "a particular entry exceeds this value.") \ apetrusenko@1375: \ apetrusenko@1375: develop(bool, G1VerifyCTCleanup, false, \ ysr@1629: "Verify card table cleanup.") \ ysr@1629: \ iveresov@1696: product(uintx, G1RSetScanBlockSize, 64, \ iveresov@1696: "Size of a work unit of cards claimed by a worker thread" \ iveresov@1696: "during RSet scanning.") \ iveresov@1696: \ tonyp@2472: develop(uintx, G1SecondaryFreeListAppendLength, 5, \ tonyp@2472: "The number of regions we will add to the secondary free list " \ tonyp@2472: "at every append operation") \ tonyp@2472: \ tonyp@2472: develop(bool, G1ConcRegionFreeingVerbose, false, \ tonyp@2472: "Enables verboseness during concurrent region freeing") \ tonyp@2472: \ tonyp@2472: develop(bool, G1StressConcRegionFreeing, false, \ tonyp@2472: "It stresses the concurrent region freeing operation") \ tonyp@2472: \ tonyp@2472: develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ tonyp@2472: "Artificial delay during concurrent region freeing") \ tonyp@2472: \ tonyp@2817: develop(uintx, G1DummyRegionsPerGC, 0, \ tonyp@2817: "The number of dummy regions G1 will allocate at the end of " \ tonyp@2817: "each evacuation pause in order to artificially fill up the " \ tonyp@2817: "heap and stress the marking implementation.") \ tonyp@2817: \ johnc@2504: develop(bool, ReduceInitialCardMarksForG1, false, \ ysr@1629: "When ReduceInitialCardMarks is true, this flag setting " \ johnc@2504: " controls whether G1 allows the RICM optimization") \ johnc@2504: \ johnc@2504: develop(bool, G1ExitOnExpansionFailure, false, \ johnc@2504: "Raise a fatal VM exit out of memory failure in the event " \ tonyp@2848: " that heap expansion fails due to running out of swap.") \ tonyp@2848: \ tonyp@2848: develop(uintx, G1ConcMarkForceOverflow, 0, \ tonyp@2848: "The number of times we'll force an overflow during " \ tonyp@2848: "concurrent marking") 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) stefank@2314: stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP