g1_globals.hpp revision 9644:033f40102037
1264790Sbapt/* 2264790Sbapt * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved. 3264790Sbapt * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4264790Sbapt * 5264790Sbapt * This code is free software; you can redistribute it and/or modify it 6264790Sbapt * under the terms of the GNU General Public License version 2 only, as 7264790Sbapt * published by the Free Software Foundation. 8264790Sbapt * 9264790Sbapt * This code is distributed in the hope that it will be useful, but WITHOUT 10264790Sbapt * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11264790Sbapt * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12264790Sbapt * version 2 for more details (a copy is included in the LICENSE file that 13264790Sbapt * accompanied this code). 14264790Sbapt * 15264790Sbapt * You should have received a copy of the GNU General Public License version 16264790Sbapt * 2 along with this work; if not, write to the Free Software Foundation, 17264790Sbapt * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18264790Sbapt * 19264790Sbapt * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20264790Sbapt * or visit www.oracle.com if you need additional information or have any 21264790Sbapt * questions. 22264790Sbapt * 23264790Sbapt */ 24264790Sbapt 25264790Sbapt#ifndef SHARE_VM_GC_G1_G1_GLOBALS_HPP 26264790Sbapt#define SHARE_VM_GC_G1_G1_GLOBALS_HPP 27264790Sbapt 28264790Sbapt#include "runtime/globals.hpp" 29264790Sbapt#include <float.h> // for DBL_MAX 30264790Sbapt// 31264790Sbapt// Defines all globals flags used by the garbage-first compiler. 32264790Sbapt// 33264790Sbapt 34264790Sbapt#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, range, constraint) \ 35264790Sbapt \ 36264790Sbapt product(bool, G1UseAdaptiveIHOP, true, \ 37264790Sbapt "Adaptively adjust the initiating heap occupancy from the " \ 38264790Sbapt "initial value of InitiatingHeapOccupancyPercent. The policy " \ 39264790Sbapt "attempts to start marking in time based on application " \ 40264790Sbapt "behavior.") \ 41264790Sbapt \ 42264790Sbapt experimental(size_t, G1AdaptiveIHOPNumInitialSamples, 3, \ 43264790Sbapt "How many completed time periods from initial mark to first " \ 44264790Sbapt "mixed gc are required to use the input values for prediction " \ 45264790Sbapt "of the optimal occupancy to start marking.") \ 46264790Sbapt range(1, max_intx) \ 47264790Sbapt \ 48264790Sbapt product(uintx, G1ConfidencePercent, 50, \ 49264790Sbapt "Confidence level for MMU/pause predictions") \ 50264790Sbapt range(0, 100) \ 51264790Sbapt \ 52264790Sbapt develop(intx, G1MarkingOverheadPercent, 0, \ 53264790Sbapt "Overhead of concurrent marking") \ 54264790Sbapt range(0, 100) \ 55264790Sbapt \ 56264790Sbapt develop(intx, G1MarkingVerboseLevel, 0, \ 57264790Sbapt "Level (0-4) of verboseness of the marking code") \ 58264790Sbapt range(0, 4) \ 59264790Sbapt \ 60264790Sbapt develop(bool, G1TraceMarkStackOverflow, false, \ 61264790Sbapt "If true, extra debugging code for CM restart for ovflw.") \ 62264790Sbapt \ 63264790Sbapt diagnostic(bool, G1SummarizeConcMark, false, \ 64264790Sbapt "Summarize concurrent mark info") \ 65264790Sbapt \ 66264790Sbapt diagnostic(bool, G1SummarizeRSetStats, false, \ 67264790Sbapt "Summarize remembered set processing info") \ 68264790Sbapt \ 69264790Sbapt diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ 70264790Sbapt "The period (in number of GCs) at which we will generate " \ 71264790Sbapt "update buffer processing info " \ 72264790Sbapt "(0 means do not periodically generate this info); " \ 73264790Sbapt "it also requires -XX:+G1SummarizeRSetStats") \ 74264790Sbapt range(0, max_intx) \ 75264790Sbapt \ 76264790Sbapt diagnostic(bool, G1TraceConcRefinement, false, \ 77264790Sbapt "Trace G1 concurrent refinement") \ 78264790Sbapt \ 79264790Sbapt experimental(bool, G1TraceStringSymbolTableScrubbing, false, \ 80264790Sbapt "Trace information string and symbol table scrubbing.") \ 81264790Sbapt \ 82264790Sbapt product(double, G1ConcMarkStepDurationMillis, 10.0, \ 83264790Sbapt "Target duration of individual concurrent marking steps " \ 84264790Sbapt "in milliseconds.") \ 85264790Sbapt range(1.0, DBL_MAX) \ 86264790Sbapt \ 87264790Sbapt product(intx, G1RefProcDrainInterval, 10, \ 88264790Sbapt "The number of discovered reference objects to process before " \ 89264790Sbapt "draining concurrent marking work queues.") \ 90264790Sbapt range(1, max_intx) \ 91264790Sbapt \ 92264790Sbapt experimental(bool, G1UseConcMarkReferenceProcessing, true, \ 93264790Sbapt "If true, enable reference discovery during concurrent " \ 94264790Sbapt "marking and reference processing at the end of remark.") \ 95264790Sbapt \ 96264790Sbapt experimental(double, G1LastPLABAverageOccupancy, 50.0, \ 97264790Sbapt "The expected average occupancy of the last PLAB in " \ 98264790Sbapt "percent.") \ 99264790Sbapt range(0.001, 100.0) \ 100264790Sbapt \ 101264790Sbapt product(size_t, G1SATBBufferSize, 1*K, \ 102264790Sbapt "Number of entries in an SATB log buffer.") \ 103264790Sbapt range(1, max_uintx) \ 104264790Sbapt \ 105264790Sbapt develop(intx, G1SATBProcessCompletedThreshold, 20, \ 106264790Sbapt "Number of completed buffers that triggers log processing.") \ 107264790Sbapt range(0, max_jint) \ 108264790Sbapt \ 109264790Sbapt product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ 110264790Sbapt "Before enqueueing them, each mutator thread tries to do some " \ 111264790Sbapt "filtering on the SATB buffers it generates. If post-filtering " \ 112264790Sbapt "the percentage of retained entries is over this threshold " \ 113264790Sbapt "the buffer will be enqueued for processing. A value of 0 " \ 114264790Sbapt "specifies that mutator threads should not do such filtering.") \ 115264790Sbapt range(0, 100) \ 116264790Sbapt \ 117264790Sbapt experimental(intx, G1ExpandByPercentOfAvailable, 20, \ 118264790Sbapt "When expanding, % of uncommitted space to claim.") \ 119264790Sbapt range(0, 100) \ 120264790Sbapt \ 121264790Sbapt develop(bool, G1RSBarrierRegionFilter, true, \ 122264790Sbapt "If true, generate region filtering code in RS barrier") \ 123264790Sbapt \ 124264790Sbapt diagnostic(bool, G1PrintRegionLivenessInfo, false, \ 125264790Sbapt "Prints the liveness information for all regions in the heap " \ 126264790Sbapt "at the end of a marking cycle.") \ 127264790Sbapt \ 128264790Sbapt product(size_t, G1UpdateBufferSize, 256, \ 129264790Sbapt "Size of an update buffer") \ 130264790Sbapt range(1, NOT_LP64(32*M) LP64_ONLY(1*G)) \ 131264790Sbapt \ 132264790Sbapt product(intx, G1ConcRefinementYellowZone, 0, \ 133264790Sbapt "Number of enqueued update buffers that will " \ 134264790Sbapt "trigger concurrent processing. Will be selected ergonomically " \ 135264790Sbapt "by default.") \ 136264790Sbapt range(0, max_intx) \ 137264790Sbapt \ 138264790Sbapt product(intx, G1ConcRefinementRedZone, 0, \ 139264790Sbapt "Maximum number of enqueued update buffers before mutator " \ 140264790Sbapt "threads start processing new ones instead of enqueueing them. " \ 141264790Sbapt "Will be selected ergonomically by default. Zero will disable " \ 142264790Sbapt "concurrent processing.") \ 143264790Sbapt range(0, max_intx) \ 144264790Sbapt \ 145264790Sbapt product(intx, G1ConcRefinementGreenZone, 0, \ 146264790Sbapt "The number of update buffers that are left in the queue by the " \ 147264790Sbapt "concurrent processing threads. Will be selected ergonomically " \ 148264790Sbapt "by default.") \ 149264790Sbapt range(0, max_intx) \ 150264790Sbapt \ 151264790Sbapt product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ 152264790Sbapt "The last concurrent refinement thread wakes up every " \ 153264790Sbapt "specified number of milliseconds to do miscellaneous work.") \ 154264790Sbapt range(0, max_jint) \ 155264790Sbapt \ 156264790Sbapt product(intx, G1ConcRefinementThresholdStep, 0, \ 157264790Sbapt "Each time the rset update queue increases by this amount " \ 158264790Sbapt "activate the next refinement thread if available. " \ 159264790Sbapt "Will be selected ergonomically by default.") \ 160264790Sbapt \ 161264790Sbapt product(intx, G1RSetUpdatingPauseTimePercent, 10, \ 162264790Sbapt "A target percentage of time that is allowed to be spend on " \ 163264790Sbapt "process RS update buffers during the collection pause.") \ 164264790Sbapt range(0, 100) \ 165264790Sbapt \ 166264790Sbapt product(bool, G1UseAdaptiveConcRefinement, true, \ 167264790Sbapt "Select green, yellow and red zones adaptively to meet the " \ 168264790Sbapt "the pause requirements.") \ 169264790Sbapt \ 170264790Sbapt product(size_t, G1ConcRSLogCacheSize, 10, \ 171264790Sbapt "Log base 2 of the length of conc RS hot-card cache.") \ 172264790Sbapt range(0, 27) \ 173264790Sbapt \ 174264790Sbapt product(uintx, G1ConcRSHotCardLimit, 4, \ 175264790Sbapt "The threshold that defines (>=) a hot card.") \ 176264790Sbapt range(0, max_jubyte) \ 177264790Sbapt \ 178264790Sbapt develop(intx, G1RSetRegionEntriesBase, 256, \ 179264790Sbapt "Max number of regions in a fine-grain table per MB.") \ 180264790Sbapt range(1, max_jint/wordSize) \ 181264790Sbapt \ 182264790Sbapt product(intx, G1RSetRegionEntries, 0, \ 183264790Sbapt "Max number of regions for which we keep bitmaps." \ 184264790Sbapt "Will be set ergonomically by default") \ 185264790Sbapt range(0, max_jint/wordSize) \ 186264790Sbapt constraint(G1RSetRegionEntriesConstraintFunc,AfterErgo) \ 187264790Sbapt \ 188264790Sbapt develop(intx, G1RSetSparseRegionEntriesBase, 4, \ 189264790Sbapt "Max number of entries per region in a sparse table " \ 190264790Sbapt "per MB.") \ 191264790Sbapt range(1, max_jint/wordSize) \ 192264790Sbapt \ 193264790Sbapt product(intx, G1RSetSparseRegionEntries, 0, \ 194264790Sbapt "Max number of entries per region in a sparse table." \ 195264790Sbapt "Will be set ergonomically by default.") \ 196264790Sbapt range(0, max_jint/wordSize) \ 197264790Sbapt constraint(G1RSetSparseRegionEntriesConstraintFunc,AfterErgo) \ 198264790Sbapt \ 199264790Sbapt develop(intx, G1MaxVerifyFailures, -1, \ 200264790Sbapt "The maximum number of verification failures to print. " \ 201264790Sbapt "-1 means print all.") \ 202264790Sbapt range(-1, max_jint) \ 203264790Sbapt \ 204264790Sbapt develop(bool, G1ScrubRemSets, true, \ 205264790Sbapt "When true, do RS scrubbing after cleanup.") \ 206264790Sbapt \ 207264790Sbapt develop(bool, G1RSScrubVerbose, false, \ 208264790Sbapt "When true, do RS scrubbing with verbose output.") \ 209264790Sbapt \ 210264790Sbapt develop(bool, G1YoungSurvRateVerbose, false, \ 211264790Sbapt "print out the survival rate of young regions according to age.") \ 212264790Sbapt \ 213264790Sbapt develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ 214264790Sbapt "the number of regions for which we'll print a surv rate " \ 215264790Sbapt "summary.") \ 216264790Sbapt range(0, max_intx) \ 217264790Sbapt constraint(G1YoungSurvRateNumRegionsSummaryConstraintFunc,AfterErgo)\ 218264790Sbapt \ 219264790Sbapt product(uintx, G1ReservePercent, 10, \ 220264790Sbapt "It determines the minimum reserve we should have in the heap " \ 221264790Sbapt "to minimize the probability of promotion failure.") \ 222264790Sbapt range(0, 50) \ 223264790Sbapt \ 224264790Sbapt diagnostic(bool, G1PrintHeapRegions, false, \ 225264790Sbapt "If set G1 will print information on which regions are being " \ 226264790Sbapt "allocated and which are reclaimed.") \ 227264790Sbapt \ 228264790Sbapt develop(bool, G1HRRSUseSparseTable, true, \ 229264790Sbapt "When true, use sparse table to save space.") \ 230264790Sbapt \ 231264790Sbapt develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ 232264790Sbapt "Forces flushing of log buffers before verification.") \ 233264790Sbapt \ 234264790Sbapt product(size_t, G1HeapRegionSize, 0, \ 235264790Sbapt "Size of the G1 regions.") \ 236264790Sbapt range(0, 32*M) \ 237264790Sbapt constraint(G1HeapRegionSizeConstraintFunc,AfterMemoryInit) \ 238264790Sbapt \ 239264790Sbapt product(uintx, G1ConcRefinementThreads, 0, \ 240264790Sbapt "If non-0 is the number of parallel rem set update threads, " \ 241264790Sbapt "otherwise the value is determined ergonomically.") \ 242264790Sbapt range(0, (max_jint-1)/wordSize) \ 243264790Sbapt \ 244264790Sbapt develop(bool, G1VerifyCTCleanup, false, \ 245264790Sbapt "Verify card table cleanup.") \ 246264790Sbapt \ 247264790Sbapt product(size_t, G1RSetScanBlockSize, 64, \ 248264790Sbapt "Size of a work unit of cards claimed by a worker thread" \ 249264790Sbapt "during RSet scanning.") \ 250264790Sbapt range(1, max_uintx) \ 251264790Sbapt \ 252264790Sbapt develop(uintx, G1SecondaryFreeListAppendLength, 5, \ 253264790Sbapt "The number of regions we will add to the secondary free list " \ 254264790Sbapt "at every append operation") \ 255264790Sbapt \ 256264790Sbapt develop(bool, G1ConcRegionFreeingVerbose, false, \ 257264790Sbapt "Enables verboseness during concurrent region freeing") \ 258264790Sbapt \ 259264790Sbapt develop(bool, G1StressConcRegionFreeing, false, \ 260264790Sbapt "It stresses the concurrent region freeing operation") \ 261264790Sbapt \ 262264790Sbapt develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ 263264790Sbapt "Artificial delay during concurrent region freeing") \ 264264790Sbapt \ 265264790Sbapt develop(uintx, G1DummyRegionsPerGC, 0, \ 266264790Sbapt "The number of dummy regions G1 will allocate at the end of " \ 267264790Sbapt "each evacuation pause in order to artificially fill up the " \ 268264790Sbapt "heap and stress the marking implementation.") \ 269264790Sbapt \ 270264790Sbapt develop(bool, G1ExitOnExpansionFailure, false, \ 271264790Sbapt "Raise a fatal VM exit out of memory failure in the event " \ 272264790Sbapt " that heap expansion fails due to running out of swap.") \ 273264790Sbapt \ 274264790Sbapt develop(uintx, G1ConcMarkForceOverflow, 0, \ 275264790Sbapt "The number of times we'll force an overflow during " \ 276264790Sbapt "concurrent marking") \ 277264790Sbapt \ 278264790Sbapt experimental(uintx, G1MaxNewSizePercent, 60, \ 279264790Sbapt "Percentage (0-100) of the heap size to use as default " \ 280264790Sbapt " maximum young gen size.") \ 281264790Sbapt range(0, 100) \ 282264790Sbapt constraint(G1MaxNewSizePercentConstraintFunc,AfterErgo) \ 283264790Sbapt \ 284264790Sbapt experimental(uintx, G1NewSizePercent, 5, \ 285264790Sbapt "Percentage (0-100) of the heap size to use as default " \ 286264790Sbapt "minimum young gen size.") \ 287264790Sbapt range(0, 100) \ 288264790Sbapt constraint(G1NewSizePercentConstraintFunc,AfterErgo) \ 289264790Sbapt \ 290264790Sbapt experimental(uintx, G1MixedGCLiveThresholdPercent, 85, \ 291264790Sbapt "Threshold for regions to be considered for inclusion in the " \ 292264790Sbapt "collection set of mixed GCs. " \ 293264790Sbapt "Regions with live bytes exceeding this will not be collected.") \ 294264790Sbapt range(0, 100) \ 295264790Sbapt \ 296264790Sbapt product(uintx, G1HeapWastePercent, 5, \ 297264790Sbapt "Amount of space, expressed as a percentage of the heap size, " \ 298264790Sbapt "that G1 is willing not to collect to avoid expensive GCs.") \ 299264790Sbapt range(0, 100) \ 300264790Sbapt \ 301264790Sbapt product(uintx, G1MixedGCCountTarget, 8, \ 302264790Sbapt "The target number of mixed GCs after a marking cycle.") \ 303264790Sbapt \ 304264790Sbapt experimental(bool, G1EagerReclaimHumongousObjects, true, \ 305264790Sbapt "Try to reclaim dead large objects at every young GC.") \ 306264790Sbapt \ 307264790Sbapt experimental(bool, G1EagerReclaimHumongousObjectsWithStaleRefs, true, \ 308264790Sbapt "Try to reclaim dead large objects that have a few stale " \ 309264790Sbapt "references at every young GC.") \ 310264790Sbapt \ 311264790Sbapt experimental(bool, G1TraceEagerReclaimHumongousObjects, false, \ 312264790Sbapt "Print some information about large object liveness " \ 313264790Sbapt "at every young GC.") \ 314264790Sbapt \ 315264790Sbapt experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \ 316264790Sbapt "An upper bound for the number of old CSet regions expressed " \ 317264790Sbapt "as a percentage of the heap size.") \ 318264790Sbapt range(0, 100) \ 319264790Sbapt \ 320264790Sbapt experimental(ccstr, G1LogLevel, NULL, \ 321264790Sbapt "Log level for G1 logging: fine, finer, finest") \ 322264790Sbapt \ 323264790Sbapt notproduct(bool, G1EvacuationFailureALot, false, \ 324264790Sbapt "Force use of evacuation failure handling during certain " \ 325264790Sbapt "evacuation pauses") \ 326264790Sbapt \ 327264790Sbapt develop(uintx, G1EvacuationFailureALotCount, 1000, \ 328264790Sbapt "Number of successful evacuations between evacuation failures " \ 329264790Sbapt "occurring at object copying") \ 330264790Sbapt \ 331264790Sbapt develop(uintx, G1EvacuationFailureALotInterval, 5, \ 332264790Sbapt "Total collections between forced triggering of evacuation " \ 333264790Sbapt "failures") \ 334264790Sbapt \ 335264790Sbapt develop(bool, G1EvacuationFailureALotDuringConcMark, true, \ 336264790Sbapt "Force use of evacuation failure handling during evacuation " \ 337264790Sbapt "pauses when marking is in progress") \ 338264790Sbapt \ 339264790Sbapt develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \ 340264790Sbapt "Force use of evacuation failure handling during initial mark " \ 341264790Sbapt "evacuation pauses") \ 342264790Sbapt \ 343264790Sbapt develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \ 344264790Sbapt "Force use of evacuation failure handling during young " \ 345264790Sbapt "evacuation pauses") \ 346264790Sbapt \ 347264790Sbapt develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \ 348264790Sbapt "Force use of evacuation failure handling during mixed " \ 349264790Sbapt "evacuation pauses") \ 350264790Sbapt \ 351264790Sbapt diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \ 352264790Sbapt "If true, perform verification of each heap region's " \ 353264790Sbapt "remembered set when verifying the heap during a full GC.") \ 354264790Sbapt \ 355264790Sbapt diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \ 356264790Sbapt "Verify the code root lists attached to each heap region.") \ 357264790Sbapt \ 358264790Sbapt develop(bool, G1VerifyBitmaps, false, \ 359264790Sbapt "Verifies the consistency of the marking bitmaps") 360264790Sbapt 361264790SbaptG1_FLAGS(DECLARE_DEVELOPER_FLAG, \ 362264790Sbapt DECLARE_PD_DEVELOPER_FLAG, \ 363264790Sbapt DECLARE_PRODUCT_FLAG, \ 364264790Sbapt DECLARE_PD_PRODUCT_FLAG, \ 365264790Sbapt DECLARE_DIAGNOSTIC_FLAG, \ 366264790Sbapt DECLARE_EXPERIMENTAL_FLAG, \ 367264790Sbapt DECLARE_NOTPRODUCT_FLAG, \ 368264790Sbapt DECLARE_MANAGEABLE_FLAG, \ 369264790Sbapt DECLARE_PRODUCT_RW_FLAG, \ 370264790Sbapt IGNORE_RANGE, \ 371264790Sbapt IGNORE_CONSTRAINT) 372264790Sbapt 373264790Sbapt#endif // SHARE_VM_GC_G1_G1_GLOBALS_HPP 374264790Sbapt