annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 2069:c33825b68624

6923430: G1: assert(res != 0,"This should have worked.") 7007446: G1: expand the heap with a single step, not one region at a time Summary: Changed G1CollectedHeap::expand() to expand the committed space by calling VirtualSpace::expand_by() once rather than for every region in the expansion amount. This allows the success or failure of the expansion to be determined before creating any heap regions. Introduced a develop flag G1ExitOnExpansionFailure (false by default) that, when true, will exit the VM if the expansion of the committed space fails. Finally G1CollectedHeap::expand() returns a status back to it's caller so that the caller knows whether to attempt the allocation. Reviewed-by: brutisso, tonyp
author johnc
date Wed, 02 Feb 2011 10:41:20 -0800
parents 234761c55641
children 02f49b66361a
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 \
ysr@342 92 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@342 93 "If true, count frac of ptr writes with null pre-vals.") \
ysr@342 94 \
tonyp@1282 95 product(intx, G1SATBBufferSize, 1*K, \
ysr@342 96 "Number of entries in an SATB log buffer.") \
ysr@342 97 \
tonyp@1282 98 develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@342 99 "Number of completed buffers that triggers log processing.") \
ysr@342 100 \
tonyp@2034 101 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
tonyp@2034 102 "Before enqueueing them, each mutator thread tries to do some " \
tonyp@2034 103 "filtering on the SATB buffers it generates. If post-filtering " \
tonyp@2034 104 "the percentage of retained entries is over this threshold " \
tonyp@2034 105 "the buffer will be enqueued for processing. A value of 0 " \
tonyp@2034 106 "specifies that mutator threads should not do such filtering.") \
tonyp@2034 107 \
ysr@342 108 develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@342 109 "If the young survival rate is S, and there's room left in " \
ysr@342 110 "to-space, we will allow regions whose survival rate is up to " \
ysr@342 111 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@342 112 \
ysr@342 113 develop(intx, G1InitYoungSurvRatio, 50, \
ysr@342 114 "Expected Survival Rate for newly allocated bytes") \
ysr@342 115 \
ysr@342 116 develop(bool, G1SATBPrintStubs, false, \
ysr@342 117 "If true, print generated stubs for the SATB barrier") \
ysr@342 118 \
tonyp@1282 119 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@342 120 "When expanding, % of uncommitted space to claim.") \
ysr@342 121 \
ysr@342 122 develop(bool, G1RSBarrierRegionFilter, true, \
ysr@342 123 "If true, generate region filtering code in RS barrier") \
ysr@342 124 \
ysr@342 125 develop(bool, G1RSBarrierNullFilter, true, \
ysr@342 126 "If true, generate null-pointer filtering code in RS barrier") \
ysr@342 127 \
ysr@342 128 develop(bool, G1PrintCTFilterStats, false, \
ysr@342 129 "If true, print stats on RS filtering effectiveness") \
ysr@342 130 \
iveresov@616 131 develop(bool, G1DeferredRSUpdate, true, \
iveresov@616 132 "If true, use deferred RS updates") \
iveresov@616 133 \
ysr@342 134 develop(bool, G1RSLogCheckCardTable, false, \
ysr@342 135 "If true, verify that no dirty cards remain after RS log " \
ysr@342 136 "processing.") \
ysr@342 137 \
ysr@342 138 develop(bool, G1RSCountHisto, false, \
ysr@342 139 "If true, print a histogram of RS occupancies after each pause") \
ysr@342 140 \
ysr@342 141 develop(intx, G1PrintRegionLivenessInfo, 0, \
ysr@342 142 "When > 0, print the occupancies of the <n> best and worst" \
ysr@342 143 "regions.") \
ysr@342 144 \
ysr@342 145 develop(bool, G1PrintParCleanupStats, false, \
ysr@342 146 "When true, print extra stats about parallel cleanup.") \
ysr@342 147 \
ysr@342 148 develop(bool, G1DisablePreBarrier, false, \
ysr@342 149 "Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@342 150 \
ysr@342 151 develop(bool, G1DisablePostBarrier, false, \
ysr@342 152 "Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@342 153 \
tonyp@883 154 product(intx, G1UpdateBufferSize, 256, \
tonyp@883 155 "Size of an update buffer") \
tonyp@883 156 \
tonyp@1282 157 product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@883 158 "Number of enqueued update buffers that will " \
iveresov@1111 159 "trigger concurrent processing. Will be selected ergonomically " \
iveresov@1111 160 "by default.") \
tonyp@883 161 \
tonyp@1282 162 product(intx, G1ConcRefinementRedZone, 0, \
tonyp@883 163 "Maximum number of enqueued update buffers before mutator " \
iveresov@1111 164 "threads start processing new ones instead of enqueueing them. " \
iveresov@1111 165 "Will be selected ergonomically by default. Zero will disable " \
iveresov@1111 166 "concurrent processing.") \
iveresov@1111 167 \
tonyp@1282 168 product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1111 169 "The number of update buffers that are left in the queue by the " \
iveresov@1111 170 "concurrent processing threads. Will be selected ergonomically " \
iveresov@1111 171 "by default.") \
iveresov@1111 172 \
tonyp@1282 173 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1111 174 "The last concurrent refinement thread wakes up every " \
iveresov@1111 175 "specified number of milliseconds to do miscellaneous work.") \
iveresov@1111 176 \
tonyp@1282 177 product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1111 178 "Each time the rset update queue increases by this amount " \
iveresov@1111 179 "activate the next refinement thread if available. " \
iveresov@1111 180 "Will be selected ergonomically by default.") \
iveresov@1111 181 \
tonyp@1282 182 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1111 183 "A target percentage of time that is allowed to be spend on " \
iveresov@1111 184 "process RS update buffers during the collection pause.") \
iveresov@1111 185 \
tonyp@1282 186 product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1111 187 "Select green, yellow and red zones adaptively to meet the " \
iveresov@1111 188 "the pause requirements.") \
ysr@342 189 \
ysr@342 190 develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@342 191 "Log base 2 of the length of conc RS hot-card cache.") \
ysr@342 192 \
johnc@751 193 develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@342 194 "The threshold that defines (>=) a hot card.") \
ysr@342 195 \
ysr@342 196 develop(bool, G1PrintOopAppls, false, \
ysr@342 197 "When true, print applications of closures to external locs.") \
ysr@342 198 \
iveresov@1261 199 develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1261 200 "Max number of regions in a fine-grain table per MB.") \
iveresov@1261 201 \
iveresov@1261 202 product(intx, G1RSetRegionEntries, 0, \
iveresov@1261 203 "Max number of regions for which we keep bitmaps." \
iveresov@1261 204 "Will be set ergonomically by default") \
iveresov@1261 205 \
iveresov@1261 206 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1261 207 "Max number of entries per region in a sparse table " \
iveresov@1261 208 "per MB.") \
iveresov@1261 209 \
iveresov@1261 210 product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1261 211 "Max number of entries per region in a sparse table." \
iveresov@1261 212 "Will be set ergonomically by default.") \
ysr@342 213 \
ysr@342 214 develop(bool, G1RecordHRRSOops, false, \
ysr@342 215 "When true, record recent calls to rem set operations.") \
ysr@342 216 \
ysr@342 217 develop(bool, G1RecordHRRSEvents, false, \
ysr@342 218 "When true, record recent calls to rem set operations.") \
ysr@342 219 \
ysr@342 220 develop(intx, G1MaxVerifyFailures, -1, \
ysr@342 221 "The maximum number of verification failrues to print. " \
ysr@342 222 "-1 means print all.") \
ysr@342 223 \
ysr@342 224 develop(bool, G1ScrubRemSets, true, \
ysr@342 225 "When true, do RS scrubbing after cleanup.") \
ysr@342 226 \
ysr@342 227 develop(bool, G1RSScrubVerbose, false, \
ysr@342 228 "When true, do RS scrubbing with verbose output.") \
ysr@342 229 \
ysr@342 230 develop(bool, G1YoungSurvRateVerbose, false, \
ysr@342 231 "print out the survival rate of young regions according to age.") \
ysr@342 232 \
ysr@342 233 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@342 234 "the number of regions for which we'll print a surv rate " \
ysr@342 235 "summary.") \
ysr@342 236 \
tonyp@1282 237 product(intx, G1ReservePercent, 10, \
ysr@342 238 "It determines the minimum reserve we should have in the heap " \
ysr@342 239 "to minimize the probability of promotion failure.") \
ysr@342 240 \
tonyp@1282 241 diagnostic(bool, G1PrintHeapRegions, false, \
ysr@342 242 "If set G1 will print information on which regions are being " \
ysr@342 243 "allocated and which are reclaimed.") \
ysr@342 244 \
ysr@342 245 develop(bool, G1HRRSUseSparseTable, true, \
ysr@342 246 "When true, use sparse table to save space.") \
ysr@342 247 \
ysr@342 248 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@342 249 "Forces flushing of log buffers before verification.") \
ysr@342 250 \
ysr@1087 251 develop(bool, G1FailOnFPError, false, \
ysr@1087 252 "When set, G1 will fail when it encounters an FP 'error', " \
ysr@1087 253 "so as to allow debugging") \
ysr@1087 254 \
johnc@751 255 develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@545 256 "When set, G1 will not adjust the tenuring threshold") \
apetrusenko@545 257 \
johnc@751 258 develop(bool, G1FixedEdenSize, false, \
apetrusenko@545 259 "When set, G1 will not allocate unused survivor space regions") \
apetrusenko@545 260 \
johnc@751 261 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@545 262 "If non-0 is the size of the G1 survivor space, " \
tonyp@638 263 "otherwise SurvivorRatio is used to determine the size") \
tonyp@638 264 \
tonyp@942 265 product(uintx, G1HeapRegionSize, 0, \
tonyp@942 266 "Size of the G1 regions.") \
tonyp@942 267 \
tonyp@1357 268 experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@638 269 "Enables the parallelization of remembered set updating " \
tonyp@638 270 "during evacuation pauses") \
tonyp@638 271 \
tonyp@1357 272 experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@638 273 "Enables the parallelization of remembered set scanning " \
iveresov@794 274 "during evacuation pauses") \
iveresov@794 275 \
tonyp@1282 276 product(uintx, G1ConcRefinementThreads, 0, \
iveresov@794 277 "If non-0 is the number of parallel rem set update threads, " \
johnc@890 278 "otherwise the value is determined ergonomically.") \
johnc@890 279 \
johnc@890 280 develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@890 281 "Expand the card count cache if the number of collisions for " \
apetrusenko@940 282 "a particular entry exceeds this value.") \
apetrusenko@940 283 \
apetrusenko@940 284 develop(bool, G1VerifyCTCleanup, false, \
ysr@1194 285 "Verify card table cleanup.") \
ysr@1194 286 \
iveresov@1261 287 product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1261 288 "Size of a work unit of cards claimed by a worker thread" \
iveresov@1261 289 "during RSet scanning.") \
iveresov@1261 290 \
tonyp@2037 291 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
tonyp@2037 292 "The number of regions we will add to the secondary free list " \
tonyp@2037 293 "at every append operation") \
tonyp@2037 294 \
tonyp@2037 295 develop(bool, G1ConcRegionFreeingVerbose, false, \
tonyp@2037 296 "Enables verboseness during concurrent region freeing") \
tonyp@2037 297 \
tonyp@2037 298 develop(bool, G1StressConcRegionFreeing, false, \
tonyp@2037 299 "It stresses the concurrent region freeing operation") \
tonyp@2037 300 \
tonyp@2037 301 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
tonyp@2037 302 "Artificial delay during concurrent region freeing") \
tonyp@2037 303 \
johnc@2069 304 develop(bool, ReduceInitialCardMarksForG1, false, \
ysr@1194 305 "When ReduceInitialCardMarks is true, this flag setting " \
johnc@2069 306 " controls whether G1 allows the RICM optimization") \
johnc@2069 307 \
johnc@2069 308 develop(bool, G1ExitOnExpansionFailure, false, \
johnc@2069 309 "Raise a fatal VM exit out of memory failure in the event " \
johnc@2069 310 " that heap expansion fails due to running out of swap.")
ysr@342 311
ysr@350 312 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 313
stefank@1879 314 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP