annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 2283:8f1042ff784d

7020042: G1: Partially remove fix for 6994628 Summary: Disable reference discovery and processing during concurrent marking by disabling fix for 6994628. Reviewed-by: tonyp, ysr
author johnc
date Fri, 18 Feb 2011 10:07:34 -0800
parents 371bbc844bf1
children e1162778c1c8
rev   line source
ysr@342 1 /*
tonyp@2034 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. 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 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
ysr@342 22 *
ysr@342 23 */
ysr@342 24
stefank@1879 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
stefank@1879 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
stefank@1879 27
stefank@1879 28 #include "runtime/globals.hpp"
stefank@1879 29
ysr@342 30 //
ysr@342 31 // Defines all globals flags used by the garbage-first compiler.
ysr@342 32 //
ysr@342 33
ysr@350 34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
ysr@342 35 \
johnc@751 36 product(intx, G1ConfidencePercent, 50, \
ysr@342 37 "Confidence level for MMU/pause predictions") \
ysr@342 38 \
tonyp@884 39 develop(intx, G1MarkingOverheadPercent, 0, \
ysr@342 40 "Overhead of concurrent marking") \
ysr@342 41 \
johnc@751 42 develop(bool, G1Gen, true, \
ysr@342 43 "If true, it will enable the generational G1") \
ysr@342 44 \
johnc@751 45 develop(intx, G1PolicyVerbose, 0, \
ysr@342 46 "The verbosity level on G1 policy decisions") \
ysr@342 47 \
ysr@342 48 develop(intx, G1MarkingVerboseLevel, 0, \
ysr@342 49 "Level (0-4) of verboseness of the marking code") \
ysr@342 50 \
tonyp@1044 51 develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1044 52 "Reachable object dump at the initial mark pause") \
tonyp@1044 53 \
tonyp@1044 54 develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1044 55 "If conc mark verification fails, dump reachable objects") \
tonyp@1044 56 \
tonyp@1044 57 develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1044 58 "The base file name for the reachable object dumps") \
ysr@342 59 \
ysr@342 60 develop(bool, G1TraceMarkStackOverflow, false, \
ysr@342 61 "If true, extra debugging code for CM restart for ovflw.") \
ysr@342 62 \
ysr@342 63 develop(intx, G1PausesBtwnConcMark, -1, \
ysr@342 64 "If positive, fixed number of pauses between conc markings") \
ysr@342 65 \
tonyp@1282 66 diagnostic(bool, G1SummarizeConcMark, false, \
ysr@342 67 "Summarize concurrent mark info") \
ysr@342 68 \
johnc@751 69 diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@342 70 "Summarize remembered set processing info") \
ysr@342 71 \
tonyp@884 72 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@884 73 "The period (in number of GCs) at which we will generate " \
tonyp@884 74 "update buffer processing info " \
tonyp@884 75 "(0 means do not periodically generate this info); " \
tonyp@884 76 "it also requires -XX:+G1SummarizeRSetStats") \
tonyp@884 77 \
tonyp@1282 78 diagnostic(bool, G1TraceConcRefinement, false, \
ysr@342 79 "Trace G1 concurrent refinement") \
ysr@342 80 \
johnc@751 81 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@342 82 "Size of the region stack for concurrent marking.") \
ysr@342 83 \
johnc@2059 84 product(double, G1ConcMarkStepDurationMillis, 10.0, \
johnc@2059 85 "Target duration of individual concurrent marking steps " \
johnc@2059 86 "in milliseconds.") \
johnc@2059 87 \
johnc@2059 88 product(intx, G1RefProcDrainInterval, 10, \
johnc@2059 89 "The number of discovered reference objects to process before " \
johnc@2059 90 "draining concurrent marking work queues.") \
johnc@2059 91 \
johnc@2283 92 experimental(bool, G1UseConcMarkReferenceProcessing, false, \
johnc@2283 93 "If true, enable reference discovery during concurrent " \
johnc@2283 94 "marking and reference processing at the end of remark " \
johnc@2283 95 "(unsafe).") \
johnc@2283 96 \
ysr@342 97 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@342 98 "If true, count frac of ptr writes with null pre-vals.") \
ysr@342 99 \
tonyp@1282 100 product(intx, G1SATBBufferSize, 1*K, \
ysr@342 101 "Number of entries in an SATB log buffer.") \
ysr@342 102 \
tonyp@1282 103 develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@342 104 "Number of completed buffers that triggers log processing.") \
ysr@342 105 \
tonyp@2034 106 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
tonyp@2034 107 "Before enqueueing them, each mutator thread tries to do some " \
tonyp@2034 108 "filtering on the SATB buffers it generates. If post-filtering " \
tonyp@2034 109 "the percentage of retained entries is over this threshold " \
tonyp@2034 110 "the buffer will be enqueued for processing. A value of 0 " \
tonyp@2034 111 "specifies that mutator threads should not do such filtering.") \
tonyp@2034 112 \
ysr@342 113 develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@342 114 "If the young survival rate is S, and there's room left in " \
ysr@342 115 "to-space, we will allow regions whose survival rate is up to " \
ysr@342 116 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@342 117 \
ysr@342 118 develop(intx, G1InitYoungSurvRatio, 50, \
ysr@342 119 "Expected Survival Rate for newly allocated bytes") \
ysr@342 120 \
ysr@342 121 develop(bool, G1SATBPrintStubs, false, \
ysr@342 122 "If true, print generated stubs for the SATB barrier") \
ysr@342 123 \
tonyp@1282 124 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@342 125 "When expanding, % of uncommitted space to claim.") \
ysr@342 126 \
ysr@342 127 develop(bool, G1RSBarrierRegionFilter, true, \
ysr@342 128 "If true, generate region filtering code in RS barrier") \
ysr@342 129 \
ysr@342 130 develop(bool, G1RSBarrierNullFilter, true, \
ysr@342 131 "If true, generate null-pointer filtering code in RS barrier") \
ysr@342 132 \
ysr@342 133 develop(bool, G1PrintCTFilterStats, false, \
ysr@342 134 "If true, print stats on RS filtering effectiveness") \
ysr@342 135 \
iveresov@616 136 develop(bool, G1DeferredRSUpdate, true, \
iveresov@616 137 "If true, use deferred RS updates") \
iveresov@616 138 \
ysr@342 139 develop(bool, G1RSLogCheckCardTable, false, \
ysr@342 140 "If true, verify that no dirty cards remain after RS log " \
ysr@342 141 "processing.") \
ysr@342 142 \
ysr@342 143 develop(bool, G1RSCountHisto, false, \
ysr@342 144 "If true, print a histogram of RS occupancies after each pause") \
ysr@342 145 \
tonyp@2282 146 product(bool, G1PrintRegionLivenessInfo, false, \
tonyp@2282 147 "Prints the liveness information for all regions in the heap " \
tonyp@2282 148 "at the end of a marking cycle.") \
ysr@342 149 \
ysr@342 150 develop(bool, G1PrintParCleanupStats, false, \
ysr@342 151 "When true, print extra stats about parallel cleanup.") \
ysr@342 152 \
ysr@342 153 develop(bool, G1DisablePreBarrier, false, \
ysr@342 154 "Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@342 155 \
ysr@342 156 develop(bool, G1DisablePostBarrier, false, \
ysr@342 157 "Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@342 158 \
tonyp@883 159 product(intx, G1UpdateBufferSize, 256, \
tonyp@883 160 "Size of an update buffer") \
tonyp@883 161 \
tonyp@1282 162 product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@883 163 "Number of enqueued update buffers that will " \
iveresov@1111 164 "trigger concurrent processing. Will be selected ergonomically " \
iveresov@1111 165 "by default.") \
tonyp@883 166 \
tonyp@1282 167 product(intx, G1ConcRefinementRedZone, 0, \
tonyp@883 168 "Maximum number of enqueued update buffers before mutator " \
iveresov@1111 169 "threads start processing new ones instead of enqueueing them. " \
iveresov@1111 170 "Will be selected ergonomically by default. Zero will disable " \
iveresov@1111 171 "concurrent processing.") \
iveresov@1111 172 \
tonyp@1282 173 product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1111 174 "The number of update buffers that are left in the queue by the " \
iveresov@1111 175 "concurrent processing threads. Will be selected ergonomically " \
iveresov@1111 176 "by default.") \
iveresov@1111 177 \
tonyp@1282 178 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1111 179 "The last concurrent refinement thread wakes up every " \
iveresov@1111 180 "specified number of milliseconds to do miscellaneous work.") \
iveresov@1111 181 \
tonyp@1282 182 product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1111 183 "Each time the rset update queue increases by this amount " \
iveresov@1111 184 "activate the next refinement thread if available. " \
iveresov@1111 185 "Will be selected ergonomically by default.") \
iveresov@1111 186 \
tonyp@1282 187 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1111 188 "A target percentage of time that is allowed to be spend on " \
iveresov@1111 189 "process RS update buffers during the collection pause.") \
iveresov@1111 190 \
tonyp@1282 191 product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1111 192 "Select green, yellow and red zones adaptively to meet the " \
iveresov@1111 193 "the pause requirements.") \
ysr@342 194 \
ysr@342 195 develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@342 196 "Log base 2 of the length of conc RS hot-card cache.") \
ysr@342 197 \
johnc@751 198 develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@342 199 "The threshold that defines (>=) a hot card.") \
ysr@342 200 \
johnc@2278 201 develop(intx, G1MaxHotCardCountSizePercent, 25, \
johnc@2278 202 "The maximum size of the hot card count cache as a " \
johnc@2278 203 "percentage of the number of cards for the maximum heap.") \
johnc@2278 204 \
ysr@342 205 develop(bool, G1PrintOopAppls, false, \
ysr@342 206 "When true, print applications of closures to external locs.") \
ysr@342 207 \
iveresov@1261 208 develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1261 209 "Max number of regions in a fine-grain table per MB.") \
iveresov@1261 210 \
iveresov@1261 211 product(intx, G1RSetRegionEntries, 0, \
iveresov@1261 212 "Max number of regions for which we keep bitmaps." \
iveresov@1261 213 "Will be set ergonomically by default") \
iveresov@1261 214 \
iveresov@1261 215 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1261 216 "Max number of entries per region in a sparse table " \
iveresov@1261 217 "per MB.") \
iveresov@1261 218 \
iveresov@1261 219 product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1261 220 "Max number of entries per region in a sparse table." \
iveresov@1261 221 "Will be set ergonomically by default.") \
ysr@342 222 \
ysr@342 223 develop(bool, G1RecordHRRSOops, false, \
ysr@342 224 "When true, record recent calls to rem set operations.") \
ysr@342 225 \
ysr@342 226 develop(bool, G1RecordHRRSEvents, false, \
ysr@342 227 "When true, record recent calls to rem set operations.") \
ysr@342 228 \
ysr@342 229 develop(intx, G1MaxVerifyFailures, -1, \
ysr@342 230 "The maximum number of verification failrues to print. " \
ysr@342 231 "-1 means print all.") \
ysr@342 232 \
ysr@342 233 develop(bool, G1ScrubRemSets, true, \
ysr@342 234 "When true, do RS scrubbing after cleanup.") \
ysr@342 235 \
ysr@342 236 develop(bool, G1RSScrubVerbose, false, \
ysr@342 237 "When true, do RS scrubbing with verbose output.") \
ysr@342 238 \
ysr@342 239 develop(bool, G1YoungSurvRateVerbose, false, \
ysr@342 240 "print out the survival rate of young regions according to age.") \
ysr@342 241 \
ysr@342 242 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@342 243 "the number of regions for which we'll print a surv rate " \
ysr@342 244 "summary.") \
ysr@342 245 \
tonyp@1282 246 product(intx, G1ReservePercent, 10, \
ysr@342 247 "It determines the minimum reserve we should have in the heap " \
ysr@342 248 "to minimize the probability of promotion failure.") \
ysr@342 249 \
tonyp@1282 250 diagnostic(bool, G1PrintHeapRegions, false, \
ysr@342 251 "If set G1 will print information on which regions are being " \
ysr@342 252 "allocated and which are reclaimed.") \
ysr@342 253 \
ysr@342 254 develop(bool, G1HRRSUseSparseTable, true, \
ysr@342 255 "When true, use sparse table to save space.") \
ysr@342 256 \
ysr@342 257 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@342 258 "Forces flushing of log buffers before verification.") \
ysr@342 259 \
ysr@1087 260 develop(bool, G1FailOnFPError, false, \
ysr@1087 261 "When set, G1 will fail when it encounters an FP 'error', " \
ysr@1087 262 "so as to allow debugging") \
ysr@1087 263 \
johnc@751 264 develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@545 265 "When set, G1 will not adjust the tenuring threshold") \
apetrusenko@545 266 \
johnc@751 267 develop(bool, G1FixedEdenSize, false, \
apetrusenko@545 268 "When set, G1 will not allocate unused survivor space regions") \
apetrusenko@545 269 \
johnc@751 270 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@545 271 "If non-0 is the size of the G1 survivor space, " \
tonyp@638 272 "otherwise SurvivorRatio is used to determine the size") \
tonyp@638 273 \
tonyp@942 274 product(uintx, G1HeapRegionSize, 0, \
tonyp@942 275 "Size of the G1 regions.") \
tonyp@942 276 \
tonyp@1357 277 experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@638 278 "Enables the parallelization of remembered set updating " \
tonyp@638 279 "during evacuation pauses") \
tonyp@638 280 \
tonyp@1357 281 experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@638 282 "Enables the parallelization of remembered set scanning " \
iveresov@794 283 "during evacuation pauses") \
iveresov@794 284 \
tonyp@1282 285 product(uintx, G1ConcRefinementThreads, 0, \
iveresov@794 286 "If non-0 is the number of parallel rem set update threads, " \
johnc@890 287 "otherwise the value is determined ergonomically.") \
johnc@890 288 \
johnc@890 289 develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@890 290 "Expand the card count cache if the number of collisions for " \
apetrusenko@940 291 "a particular entry exceeds this value.") \
apetrusenko@940 292 \
apetrusenko@940 293 develop(bool, G1VerifyCTCleanup, false, \
ysr@1194 294 "Verify card table cleanup.") \
ysr@1194 295 \
iveresov@1261 296 product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1261 297 "Size of a work unit of cards claimed by a worker thread" \
iveresov@1261 298 "during RSet scanning.") \
iveresov@1261 299 \
tonyp@2037 300 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
tonyp@2037 301 "The number of regions we will add to the secondary free list " \
tonyp@2037 302 "at every append operation") \
tonyp@2037 303 \
tonyp@2037 304 develop(bool, G1ConcRegionFreeingVerbose, false, \
tonyp@2037 305 "Enables verboseness during concurrent region freeing") \
tonyp@2037 306 \
tonyp@2037 307 develop(bool, G1StressConcRegionFreeing, false, \
tonyp@2037 308 "It stresses the concurrent region freeing operation") \
tonyp@2037 309 \
tonyp@2037 310 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
tonyp@2037 311 "Artificial delay during concurrent region freeing") \
tonyp@2037 312 \
johnc@2069 313 develop(bool, ReduceInitialCardMarksForG1, false, \
ysr@1194 314 "When ReduceInitialCardMarks is true, this flag setting " \
johnc@2069 315 " controls whether G1 allows the RICM optimization") \
johnc@2069 316 \
johnc@2069 317 develop(bool, G1ExitOnExpansionFailure, false, \
johnc@2069 318 "Raise a fatal VM exit out of memory failure in the event " \
johnc@2069 319 " that heap expansion fails due to running out of swap.")
ysr@342 320
ysr@350 321 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@1879 322
stefank@1879 323 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP