annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 1357:781e29eb8e08

6677708: G1: re-enable parallel RSet updating and scanning Summary: Enable parallel RSet updating and scanning. Reviewed-by: iveresov, jmasa
author tonyp
date Fri, 02 Apr 2010 12:10:08 -0400
parents 56507bcd639e
children 79e419e5ea3b
rev   line source
ysr@342 1 /*
xdono@579 2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
ysr@342 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@342 4 *
ysr@342 5 * This code is free software; you can redistribute it and/or modify it
ysr@342 6 * under the terms of the GNU General Public License version 2 only, as
ysr@342 7 * published by the Free Software Foundation.
ysr@342 8 *
ysr@342 9 * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@342 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@342 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ysr@342 12 * version 2 for more details (a copy is included in the LICENSE file that
ysr@342 13 * accompanied this code).
ysr@342 14 *
ysr@342 15 * You should have received a copy of the GNU General Public License version
ysr@342 16 * 2 along with this work; if not, write to the Free Software Foundation,
ysr@342 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@342 18 *
ysr@342 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@342 20 * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@342 21 * have any questions.
ysr@342 22 *
ysr@342 23 */
ysr@342 24
ysr@342 25 //
ysr@342 26 // Defines all globals flags used by the garbage-first compiler.
ysr@342 27 //
ysr@342 28
ysr@350 29 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
ysr@342 30 \
johnc@751 31 product(intx, G1ParallelGCAllocBufferSize, 8*K, \
ysr@342 32 "Size of parallel G1 allocation buffers in to-space.") \
ysr@342 33 \
johnc@751 34 product(intx, G1ConfidencePercent, 50, \
ysr@342 35 "Confidence level for MMU/pause predictions") \
ysr@342 36 \
tonyp@884 37 develop(intx, G1MarkingOverheadPercent, 0, \
ysr@342 38 "Overhead of concurrent marking") \
ysr@342 39 \
johnc@751 40 develop(bool, G1Gen, true, \
ysr@342 41 "If true, it will enable the generational G1") \
ysr@342 42 \
johnc@751 43 develop(intx, G1PolicyVerbose, 0, \
ysr@342 44 "The verbosity level on G1 policy decisions") \
ysr@342 45 \
ysr@342 46 develop(bool, G1UseHRIntoRS, true, \
ysr@342 47 "Determines whether the 'advanced' HR Into rem set is used.") \
ysr@342 48 \
ysr@342 49 develop(intx, G1MarkingVerboseLevel, 0, \
ysr@342 50 "Level (0-4) of verboseness of the marking code") \
ysr@342 51 \
tonyp@1044 52 develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1044 53 "Reachable object dump at the initial mark pause") \
tonyp@1044 54 \
tonyp@1044 55 develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1044 56 "If conc mark verification fails, dump reachable objects") \
tonyp@1044 57 \
tonyp@1044 58 develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1044 59 "The base file name for the reachable object dumps") \
ysr@342 60 \
ysr@342 61 develop(bool, G1TraceMarkStackOverflow, false, \
ysr@342 62 "If true, extra debugging code for CM restart for ovflw.") \
ysr@342 63 \
ysr@342 64 develop(intx, G1PausesBtwnConcMark, -1, \
ysr@342 65 "If positive, fixed number of pauses between conc markings") \
ysr@342 66 \
tonyp@1282 67 diagnostic(bool, G1SummarizeConcMark, false, \
ysr@342 68 "Summarize concurrent mark info") \
ysr@342 69 \
johnc@751 70 diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@342 71 "Summarize remembered set processing info") \
ysr@342 72 \
tonyp@884 73 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@884 74 "The period (in number of GCs) at which we will generate " \
tonyp@884 75 "update buffer processing info " \
tonyp@884 76 "(0 means do not periodically generate this info); " \
tonyp@884 77 "it also requires -XX:+G1SummarizeRSetStats") \
tonyp@884 78 \
johnc@751 79 diagnostic(bool, G1SummarizeZFStats, false, \
ysr@342 80 "Summarize zero-filling info") \
ysr@342 81 \
tonyp@1282 82 diagnostic(bool, G1TraceConcRefinement, false, \
ysr@342 83 "Trace G1 concurrent refinement") \
ysr@342 84 \
johnc@751 85 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@342 86 "Size of the region stack for concurrent marking.") \
ysr@342 87 \
ysr@342 88 develop(bool, G1ConcZeroFill, true, \
ysr@342 89 "If true, run concurrent zero-filling thread") \
ysr@342 90 \
ysr@342 91 develop(intx, G1ConcZFMaxRegions, 1, \
ysr@342 92 "Stop zero-filling when # of zf'd regions reaches") \
ysr@342 93 \
ysr@342 94 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@342 95 "If true, count frac of ptr writes with null pre-vals.") \
ysr@342 96 \
tonyp@1282 97 product(intx, G1SATBBufferSize, 1*K, \
ysr@342 98 "Number of entries in an SATB log buffer.") \
ysr@342 99 \
tonyp@1282 100 develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@342 101 "Number of completed buffers that triggers log processing.") \
ysr@342 102 \
ysr@342 103 develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@342 104 "If the young survival rate is S, and there's room left in " \
ysr@342 105 "to-space, we will allow regions whose survival rate is up to " \
ysr@342 106 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@342 107 \
ysr@342 108 develop(intx, G1InitYoungSurvRatio, 50, \
ysr@342 109 "Expected Survival Rate for newly allocated bytes") \
ysr@342 110 \
ysr@342 111 develop(bool, G1SATBPrintStubs, false, \
ysr@342 112 "If true, print generated stubs for the SATB barrier") \
ysr@342 113 \
tonyp@1282 114 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@342 115 "When expanding, % of uncommitted space to claim.") \
ysr@342 116 \
ysr@342 117 develop(bool, G1RSBarrierRegionFilter, true, \
ysr@342 118 "If true, generate region filtering code in RS barrier") \
ysr@342 119 \
ysr@342 120 develop(bool, G1RSBarrierNullFilter, true, \
ysr@342 121 "If true, generate null-pointer filtering code in RS barrier") \
ysr@342 122 \
ysr@342 123 develop(bool, G1PrintCTFilterStats, false, \
ysr@342 124 "If true, print stats on RS filtering effectiveness") \
ysr@342 125 \
iveresov@616 126 develop(bool, G1DeferredRSUpdate, true, \
iveresov@616 127 "If true, use deferred RS updates") \
iveresov@616 128 \
ysr@342 129 develop(bool, G1RSLogCheckCardTable, false, \
ysr@342 130 "If true, verify that no dirty cards remain after RS log " \
ysr@342 131 "processing.") \
ysr@342 132 \
ysr@342 133 develop(bool, G1RSCountHisto, false, \
ysr@342 134 "If true, print a histogram of RS occupancies after each pause") \
ysr@342 135 \
ysr@342 136 develop(intx, G1PrintRegionLivenessInfo, 0, \
ysr@342 137 "When > 0, print the occupancies of the <n> best and worst" \
ysr@342 138 "regions.") \
ysr@342 139 \
ysr@342 140 develop(bool, G1PrintParCleanupStats, false, \
ysr@342 141 "When true, print extra stats about parallel cleanup.") \
ysr@342 142 \
ysr@342 143 develop(bool, G1DisablePreBarrier, false, \
ysr@342 144 "Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@342 145 \
ysr@342 146 develop(bool, G1DisablePostBarrier, false, \
ysr@342 147 "Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@342 148 \
tonyp@883 149 product(intx, G1UpdateBufferSize, 256, \
tonyp@883 150 "Size of an update buffer") \
tonyp@883 151 \
tonyp@1282 152 product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@883 153 "Number of enqueued update buffers that will " \
iveresov@1111 154 "trigger concurrent processing. Will be selected ergonomically " \
iveresov@1111 155 "by default.") \
tonyp@883 156 \
tonyp@1282 157 product(intx, G1ConcRefinementRedZone, 0, \
tonyp@883 158 "Maximum number of enqueued update buffers before mutator " \
iveresov@1111 159 "threads start processing new ones instead of enqueueing them. " \
iveresov@1111 160 "Will be selected ergonomically by default. Zero will disable " \
iveresov@1111 161 "concurrent processing.") \
iveresov@1111 162 \
tonyp@1282 163 product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1111 164 "The number of update buffers that are left in the queue by the " \
iveresov@1111 165 "concurrent processing threads. Will be selected ergonomically " \
iveresov@1111 166 "by default.") \
iveresov@1111 167 \
tonyp@1282 168 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1111 169 "The last concurrent refinement thread wakes up every " \
iveresov@1111 170 "specified number of milliseconds to do miscellaneous work.") \
iveresov@1111 171 \
tonyp@1282 172 product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1111 173 "Each time the rset update queue increases by this amount " \
iveresov@1111 174 "activate the next refinement thread if available. " \
iveresov@1111 175 "Will be selected ergonomically by default.") \
iveresov@1111 176 \
tonyp@1282 177 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1111 178 "A target percentage of time that is allowed to be spend on " \
iveresov@1111 179 "process RS update buffers during the collection pause.") \
iveresov@1111 180 \
tonyp@1282 181 product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1111 182 "Select green, yellow and red zones adaptively to meet the " \
iveresov@1111 183 "the pause requirements.") \
ysr@342 184 \
ysr@342 185 develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@342 186 "Log base 2 of the length of conc RS hot-card cache.") \
ysr@342 187 \
johnc@751 188 develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@342 189 "The threshold that defines (>=) a hot card.") \
ysr@342 190 \
ysr@342 191 develop(bool, G1PrintOopAppls, false, \
ysr@342 192 "When true, print applications of closures to external locs.") \
ysr@342 193 \
iveresov@1261 194 develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1261 195 "Max number of regions in a fine-grain table per MB.") \
iveresov@1261 196 \
iveresov@1261 197 product(intx, G1RSetRegionEntries, 0, \
iveresov@1261 198 "Max number of regions for which we keep bitmaps." \
iveresov@1261 199 "Will be set ergonomically by default") \
iveresov@1261 200 \
iveresov@1261 201 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1261 202 "Max number of entries per region in a sparse table " \
iveresov@1261 203 "per MB.") \
iveresov@1261 204 \
iveresov@1261 205 product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1261 206 "Max number of entries per region in a sparse table." \
iveresov@1261 207 "Will be set ergonomically by default.") \
ysr@342 208 \
ysr@342 209 develop(bool, G1RecordHRRSOops, false, \
ysr@342 210 "When true, record recent calls to rem set operations.") \
ysr@342 211 \
ysr@342 212 develop(bool, G1RecordHRRSEvents, false, \
ysr@342 213 "When true, record recent calls to rem set operations.") \
ysr@342 214 \
ysr@342 215 develop(intx, G1MaxVerifyFailures, -1, \
ysr@342 216 "The maximum number of verification failrues to print. " \
ysr@342 217 "-1 means print all.") \
ysr@342 218 \
ysr@342 219 develop(bool, G1ScrubRemSets, true, \
ysr@342 220 "When true, do RS scrubbing after cleanup.") \
ysr@342 221 \
ysr@342 222 develop(bool, G1RSScrubVerbose, false, \
ysr@342 223 "When true, do RS scrubbing with verbose output.") \
ysr@342 224 \
ysr@342 225 develop(bool, G1YoungSurvRateVerbose, false, \
ysr@342 226 "print out the survival rate of young regions according to age.") \
ysr@342 227 \
ysr@342 228 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@342 229 "the number of regions for which we'll print a surv rate " \
ysr@342 230 "summary.") \
ysr@342 231 \
tonyp@1282 232 develop(bool, G1UseScanOnlyPrefix, false, \
ysr@342 233 "It determines whether the system will calculate an optimum " \
ysr@342 234 "scan-only set.") \
ysr@342 235 \
tonyp@1282 236 product(intx, G1ReservePercent, 10, \
ysr@342 237 "It determines the minimum reserve we should have in the heap " \
ysr@342 238 "to minimize the probability of promotion failure.") \
ysr@342 239 \
tonyp@1282 240 diagnostic(bool, G1PrintHeapRegions, false, \
ysr@342 241 "If set G1 will print information on which regions are being " \
ysr@342 242 "allocated and which are reclaimed.") \
ysr@342 243 \
ysr@342 244 develop(bool, G1HRRSUseSparseTable, true, \
ysr@342 245 "When true, use sparse table to save space.") \
ysr@342 246 \
ysr@342 247 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@342 248 "Forces flushing of log buffers before verification.") \
ysr@342 249 \
ysr@1087 250 develop(bool, G1FailOnFPError, false, \
ysr@1087 251 "When set, G1 will fail when it encounters an FP 'error', " \
ysr@1087 252 "so as to allow debugging") \
ysr@1087 253 \
johnc@751 254 develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@545 255 "When set, G1 will not adjust the tenuring threshold") \
apetrusenko@545 256 \
johnc@751 257 develop(bool, G1FixedEdenSize, false, \
apetrusenko@545 258 "When set, G1 will not allocate unused survivor space regions") \
apetrusenko@545 259 \
johnc@751 260 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@545 261 "If non-0 is the size of the G1 survivor space, " \
tonyp@638 262 "otherwise SurvivorRatio is used to determine the size") \
tonyp@638 263 \
tonyp@1282 264 product(bool, G1UseFixedWindowMMUTracker, false, \
ysr@1088 265 "If the MMU tracker's memory is full, forget the oldest entry") \
ysr@1088 266 \
tonyp@942 267 product(uintx, G1HeapRegionSize, 0, \
tonyp@942 268 "Size of the G1 regions.") \
tonyp@942 269 \
tonyp@1357 270 experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@638 271 "Enables the parallelization of remembered set updating " \
tonyp@638 272 "during evacuation pauses") \
tonyp@638 273 \
tonyp@1357 274 experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@638 275 "Enables the parallelization of remembered set scanning " \
iveresov@794 276 "during evacuation pauses") \
iveresov@794 277 \
tonyp@1282 278 product(uintx, G1ConcRefinementThreads, 0, \
iveresov@794 279 "If non-0 is the number of parallel rem set update threads, " \
johnc@890 280 "otherwise the value is determined ergonomically.") \
johnc@890 281 \
johnc@890 282 develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@890 283 "Expand the card count cache if the number of collisions for " \
apetrusenko@940 284 "a particular entry exceeds this value.") \
apetrusenko@940 285 \
apetrusenko@940 286 develop(bool, G1VerifyCTCleanup, false, \
ysr@1194 287 "Verify card table cleanup.") \
ysr@1194 288 \
iveresov@1261 289 product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1261 290 "Size of a work unit of cards claimed by a worker thread" \
iveresov@1261 291 "during RSet scanning.") \
iveresov@1261 292 \
ysr@1194 293 develop(bool, ReduceInitialCardMarksForG1, false, \
ysr@1194 294 "When ReduceInitialCardMarks is true, this flag setting " \
ysr@1194 295 " controls whether G1 allows the RICM optimization")
ysr@342 296
ysr@350 297 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)