Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 2431:02f49b66361a
7026932: G1: No need to abort VM when card count cache expansion fails
Summary: Manage allocation/freeing of the card cache counts and epochs arrays directly so that an allocation failure while attempting to expand these arrays does not abort the JVM. Failure to expand these arrays is not fatal.
Reviewed-by: iveresov, tonyp
| author | johnc |
|---|---|
| date | Mon, 28 Mar 2011 10:58:54 -0700 |
| parents | c33825b68624 |
| children | 371bbc844bf1 |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 2149 | 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP | |
| 27 | |
| 28 #include "runtime/globals.hpp" | |
| 29 | |
| 342 | 30 // |
| 31 // Defines all globals flags used by the garbage-first compiler. | |
| 32 // | |
| 33 | |
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34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \ |
| 342 | 35 \ |
| 751 | 36 product(intx, G1ConfidencePercent, 50, \ |
| 342 | 37 "Confidence level for MMU/pause predictions") \ |
| 38 \ | |
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39 develop(intx, G1MarkingOverheadPercent, 0, \ |
| 342 | 40 "Overhead of concurrent marking") \ |
| 41 \ | |
| 751 | 42 develop(bool, G1Gen, true, \ |
| 342 | 43 "If true, it will enable the generational G1") \ |
| 44 \ | |
| 751 | 45 develop(intx, G1PolicyVerbose, 0, \ |
| 342 | 46 "The verbosity level on G1 policy decisions") \ |
| 47 \ | |
| 48 develop(intx, G1MarkingVerboseLevel, 0, \ | |
| 49 "Level (0-4) of verboseness of the marking code") \ | |
| 50 \ | |
| 1044 | 51 develop(bool, G1PrintReachableAtInitialMark, false, \ |
| 52 "Reachable object dump at the initial mark pause") \ | |
| 53 \ | |
| 54 develop(bool, G1VerifyDuringGCPrintReachable, false, \ | |
| 55 "If conc mark verification fails, dump reachable objects") \ | |
| 56 \ | |
| 57 develop(ccstr, G1PrintReachableBaseFile, NULL, \ | |
| 58 "The base file name for the reachable object dumps") \ | |
| 342 | 59 \ |
| 60 develop(bool, G1TraceMarkStackOverflow, false, \ | |
| 61 "If true, extra debugging code for CM restart for ovflw.") \ | |
| 62 \ | |
| 63 develop(intx, G1PausesBtwnConcMark, -1, \ | |
| 64 "If positive, fixed number of pauses between conc markings") \ | |
| 65 \ | |
| 1282 | 66 diagnostic(bool, G1SummarizeConcMark, false, \ |
| 342 | 67 "Summarize concurrent mark info") \ |
| 68 \ | |
| 751 | 69 diagnostic(bool, G1SummarizeRSetStats, false, \ |
| 342 | 70 "Summarize remembered set processing info") \ |
| 71 \ | |
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72 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ |
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73 "The period (in number of GCs) at which we will generate " \ |
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74 "update buffer processing info " \ |
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75 "(0 means do not periodically generate this info); " \ |
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76 "it also requires -XX:+G1SummarizeRSetStats") \ |
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77 \ |
| 1282 | 78 diagnostic(bool, G1TraceConcRefinement, false, \ |
| 342 | 79 "Trace G1 concurrent refinement") \ |
| 80 \ | |
| 751 | 81 product(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
| 342 | 82 "Size of the region stack for concurrent marking.") \ |
| 83 \ | |
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84 product(double, G1ConcMarkStepDurationMillis, 10.0, \ |
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85 "Target duration of individual concurrent marking steps " \ |
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86 "in milliseconds.") \ |
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87 \ |
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88 product(intx, G1RefProcDrainInterval, 10, \ |
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89 "The number of discovered reference objects to process before " \ |
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90 "draining concurrent marking work queues.") \ |
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91 \ |
| 342 | 92 develop(bool, G1SATBBarrierPrintNullPreVals, false, \ |
| 93 "If true, count frac of ptr writes with null pre-vals.") \ | |
| 94 \ | |
| 1282 | 95 product(intx, G1SATBBufferSize, 1*K, \ |
| 342 | 96 "Number of entries in an SATB log buffer.") \ |
| 97 \ | |
| 1282 | 98 develop(intx, G1SATBProcessCompletedThreshold, 20, \ |
| 342 | 99 "Number of completed buffers that triggers log processing.") \ |
| 100 \ | |
| 2149 | 101 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ |
| 102 "Before enqueueing them, each mutator thread tries to do some " \ | |
| 103 "filtering on the SATB buffers it generates. If post-filtering " \ | |
| 104 "the percentage of retained entries is over this threshold " \ | |
| 105 "the buffer will be enqueued for processing. A value of 0 " \ | |
| 106 "specifies that mutator threads should not do such filtering.") \ | |
| 107 \ | |
| 342 | 108 develop(intx, G1ExtraRegionSurvRate, 33, \ |
| 109 "If the young survival rate is S, and there's room left in " \ | |
| 110 "to-space, we will allow regions whose survival rate is up to " \ | |
| 111 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
| 112 \ | |
| 113 develop(intx, G1InitYoungSurvRatio, 50, \ | |
| 114 "Expected Survival Rate for newly allocated bytes") \ | |
| 115 \ | |
| 116 develop(bool, G1SATBPrintStubs, false, \ | |
| 117 "If true, print generated stubs for the SATB barrier") \ | |
| 118 \ | |
| 1282 | 119 experimental(intx, G1ExpandByPercentOfAvailable, 20, \ |
| 342 | 120 "When expanding, % of uncommitted space to claim.") \ |
| 121 \ | |
| 122 develop(bool, G1RSBarrierRegionFilter, true, \ | |
| 123 "If true, generate region filtering code in RS barrier") \ | |
| 124 \ | |
| 125 develop(bool, G1RSBarrierNullFilter, true, \ | |
| 126 "If true, generate null-pointer filtering code in RS barrier") \ | |
| 127 \ | |
| 128 develop(bool, G1PrintCTFilterStats, false, \ | |
| 129 "If true, print stats on RS filtering effectiveness") \ | |
| 130 \ | |
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131 develop(bool, G1DeferredRSUpdate, true, \ |
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132 "If true, use deferred RS updates") \ |
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133 \ |
| 342 | 134 develop(bool, G1RSLogCheckCardTable, false, \ |
| 135 "If true, verify that no dirty cards remain after RS log " \ | |
| 136 "processing.") \ | |
| 137 \ | |
| 138 develop(bool, G1RSCountHisto, false, \ | |
| 139 "If true, print a histogram of RS occupancies after each pause") \ | |
| 140 \ | |
| 141 develop(intx, G1PrintRegionLivenessInfo, 0, \ | |
| 142 "When > 0, print the occupancies of the <n> best and worst" \ | |
| 143 "regions.") \ | |
| 144 \ | |
| 145 develop(bool, G1PrintParCleanupStats, false, \ | |
| 146 "When true, print extra stats about parallel cleanup.") \ | |
| 147 \ | |
| 148 develop(bool, G1DisablePreBarrier, false, \ | |
| 149 "Disable generation of pre-barrier (i.e., marking barrier) ") \ | |
| 150 \ | |
| 151 develop(bool, G1DisablePostBarrier, false, \ | |
| 152 "Disable generation of post-barrier (i.e., RS barrier) ") \ | |
| 153 \ | |
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154 product(intx, G1UpdateBufferSize, 256, \ |
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155 "Size of an update buffer") \ |
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156 \ |
| 1282 | 157 product(intx, G1ConcRefinementYellowZone, 0, \ |
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158 "Number of enqueued update buffers that will " \ |
| 1111 | 159 "trigger concurrent processing. Will be selected ergonomically " \ |
| 160 "by default.") \ | |
| 161 \ | |
| 1282 | 162 product(intx, G1ConcRefinementRedZone, 0, \ |
| 1111 | 163 "Maximum number of enqueued update buffers before mutator " \ |
| 164 "threads start processing new ones instead of enqueueing them. " \ | |
| 165 "Will be selected ergonomically by default. Zero will disable " \ | |
| 166 "concurrent processing.") \ | |
| 167 \ | |
| 1282 | 168 product(intx, G1ConcRefinementGreenZone, 0, \ |
| 1111 | 169 "The number of update buffers that are left in the queue by the " \ |
| 170 "concurrent processing threads. Will be selected ergonomically " \ | |
| 171 "by default.") \ | |
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172 \ |
| 1282 | 173 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ |
| 1111 | 174 "The last concurrent refinement thread wakes up every " \ |
| 175 "specified number of milliseconds to do miscellaneous work.") \ | |
| 176 \ | |
| 1282 | 177 product(intx, G1ConcRefinementThresholdStep, 0, \ |
| 1111 | 178 "Each time the rset update queue increases by this amount " \ |
| 179 "activate the next refinement thread if available. " \ | |
| 180 "Will be selected ergonomically by default.") \ | |
| 181 \ | |
| 1282 | 182 product(intx, G1RSetUpdatingPauseTimePercent, 10, \ |
| 1111 | 183 "A target percentage of time that is allowed to be spend on " \ |
| 184 "process RS update buffers during the collection pause.") \ | |
| 185 \ | |
| 1282 | 186 product(bool, G1UseAdaptiveConcRefinement, true, \ |
| 1111 | 187 "Select green, yellow and red zones adaptively to meet the " \ |
| 188 "the pause requirements.") \ | |
| 342 | 189 \ |
| 190 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
| 191 "Log base 2 of the length of conc RS hot-card cache.") \ | |
| 192 \ | |
| 751 | 193 develop(intx, G1ConcRSHotCardLimit, 4, \ |
| 342 | 194 "The threshold that defines (>=) a hot card.") \ |
| 195 \ | |
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196 develop(intx, G1MaxHotCardCountSizePercent, 25, \ |
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197 "The maximum size of the hot card count cache as a " \ |
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198 "percentage of the number of cards for the maximum heap.") \ |
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199 \ |
| 342 | 200 develop(bool, G1PrintOopAppls, false, \ |
| 201 "When true, print applications of closures to external locs.") \ | |
| 202 \ | |
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203 develop(intx, G1RSetRegionEntriesBase, 256, \ |
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204 "Max number of regions in a fine-grain table per MB.") \ |
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205 \ |
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206 product(intx, G1RSetRegionEntries, 0, \ |
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207 "Max number of regions for which we keep bitmaps." \ |
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208 "Will be set ergonomically by default") \ |
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209 \ |
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210 develop(intx, G1RSetSparseRegionEntriesBase, 4, \ |
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211 "Max number of entries per region in a sparse table " \ |
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212 "per MB.") \ |
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213 \ |
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214 product(intx, G1RSetSparseRegionEntries, 0, \ |
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215 "Max number of entries per region in a sparse table." \ |
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216 "Will be set ergonomically by default.") \ |
| 342 | 217 \ |
| 218 develop(bool, G1RecordHRRSOops, false, \ | |
| 219 "When true, record recent calls to rem set operations.") \ | |
| 220 \ | |
| 221 develop(bool, G1RecordHRRSEvents, false, \ | |
| 222 "When true, record recent calls to rem set operations.") \ | |
| 223 \ | |
| 224 develop(intx, G1MaxVerifyFailures, -1, \ | |
| 225 "The maximum number of verification failrues to print. " \ | |
| 226 "-1 means print all.") \ | |
| 227 \ | |
| 228 develop(bool, G1ScrubRemSets, true, \ | |
| 229 "When true, do RS scrubbing after cleanup.") \ | |
| 230 \ | |
| 231 develop(bool, G1RSScrubVerbose, false, \ | |
| 232 "When true, do RS scrubbing with verbose output.") \ | |
| 233 \ | |
| 234 develop(bool, G1YoungSurvRateVerbose, false, \ | |
| 235 "print out the survival rate of young regions according to age.") \ | |
| 236 \ | |
| 237 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
| 238 "the number of regions for which we'll print a surv rate " \ | |
| 239 "summary.") \ | |
| 240 \ | |
| 1282 | 241 product(intx, G1ReservePercent, 10, \ |
| 342 | 242 "It determines the minimum reserve we should have in the heap " \ |
| 243 "to minimize the probability of promotion failure.") \ | |
| 244 \ | |
| 1282 | 245 diagnostic(bool, G1PrintHeapRegions, false, \ |
| 342 | 246 "If set G1 will print information on which regions are being " \ |
| 247 "allocated and which are reclaimed.") \ | |
| 248 \ | |
| 249 develop(bool, G1HRRSUseSparseTable, true, \ | |
| 250 "When true, use sparse table to save space.") \ | |
| 251 \ | |
| 252 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
| 253 "Forces flushing of log buffers before verification.") \ | |
| 254 \ | |
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255 develop(bool, G1FailOnFPError, false, \ |
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256 "When set, G1 will fail when it encounters an FP 'error', " \ |
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257 "so as to allow debugging") \ |
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258 \ |
| 751 | 259 develop(bool, G1FixedTenuringThreshold, false, \ |
| 545 | 260 "When set, G1 will not adjust the tenuring threshold") \ |
| 261 \ | |
| 751 | 262 develop(bool, G1FixedEdenSize, false, \ |
| 545 | 263 "When set, G1 will not allocate unused survivor space regions") \ |
| 264 \ | |
| 751 | 265 develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
| 545 | 266 "If non-0 is the size of the G1 survivor space, " \ |
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267 "otherwise SurvivorRatio is used to determine the size") \ |
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268 \ |
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269 product(uintx, G1HeapRegionSize, 0, \ |
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270 "Size of the G1 regions.") \ |
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271 \ |
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272 experimental(bool, G1UseParallelRSetUpdating, true, \ |
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273 "Enables the parallelization of remembered set updating " \ |
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274 "during evacuation pauses") \ |
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275 \ |
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276 experimental(bool, G1UseParallelRSetScanning, true, \ |
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277 "Enables the parallelization of remembered set scanning " \ |
| 794 | 278 "during evacuation pauses") \ |
| 279 \ | |
| 1282 | 280 product(uintx, G1ConcRefinementThreads, 0, \ |
| 794 | 281 "If non-0 is the number of parallel rem set update threads, " \ |
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282 "otherwise the value is determined ergonomically.") \ |
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283 \ |
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284 develop(intx, G1CardCountCacheExpandThreshold, 16, \ |
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285 "Expand the card count cache if the number of collisions for " \ |
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286 "a particular entry exceeds this value.") \ |
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287 \ |
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288 develop(bool, G1VerifyCTCleanup, false, \ |
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289 "Verify card table cleanup.") \ |
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290 \ |
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291 product(uintx, G1RSetScanBlockSize, 64, \ |
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292 "Size of a work unit of cards claimed by a worker thread" \ |
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293 "during RSet scanning.") \ |
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294 \ |
| 2152 | 295 develop(uintx, G1SecondaryFreeListAppendLength, 5, \ |
| 296 "The number of regions we will add to the secondary free list " \ | |
| 297 "at every append operation") \ | |
| 298 \ | |
| 299 develop(bool, G1ConcRegionFreeingVerbose, false, \ | |
| 300 "Enables verboseness during concurrent region freeing") \ | |
| 301 \ | |
| 302 develop(bool, G1StressConcRegionFreeing, false, \ | |
| 303 "It stresses the concurrent region freeing operation") \ | |
| 304 \ | |
| 305 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ | |
| 306 "Artificial delay during concurrent region freeing") \ | |
| 307 \ | |
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308 develop(bool, ReduceInitialCardMarksForG1, false, \ |
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309 "When ReduceInitialCardMarks is true, this flag setting " \ |
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310 " controls whether G1 allows the RICM optimization") \ |
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311 \ |
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312 develop(bool, G1ExitOnExpansionFailure, false, \ |
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313 "Raise a fatal VM exit out of memory failure in the event " \ |
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314 " that heap expansion fails due to running out of swap.") |
| 342 | 315 |
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316 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) |
| 1972 | 317 |
| 318 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP |