Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 3285:49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
Summary: It introduces non-product cmd line parameter G1DummyRegionsPerGC which indicates how many "dummy" regions to allocate at the end of each GC. This allows the G1 heap to grow artificially and makes concurrent marking cycles more frequent irrespective of what the application that is running is doing. The dummy regions will be found totally empty during cleanup so this parameter can also be used to stress the concurrent cleanup operation.
Reviewed-by: brutisso, johnc
| author | tonyp |
|---|---|
| date | Tue, 19 Apr 2011 15:46:59 -0400 |
| parents | e1162778c1c8 |
| children | cd8e33b2a8ad |
| 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 \ |
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92 experimental(bool, G1UseConcMarkReferenceProcessing, true, \ |
| 2436 | 93 "If true, enable reference discovery during concurrent " \ |
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94 "marking and reference processing at the end of remark.") \ |
| 342 | 95 \ |
| 1282 | 96 product(intx, G1SATBBufferSize, 1*K, \ |
| 342 | 97 "Number of entries in an SATB log buffer.") \ |
| 98 \ | |
| 1282 | 99 develop(intx, G1SATBProcessCompletedThreshold, 20, \ |
| 342 | 100 "Number of completed buffers that triggers log processing.") \ |
| 101 \ | |
| 2149 | 102 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ |
| 103 "Before enqueueing them, each mutator thread tries to do some " \ | |
| 104 "filtering on the SATB buffers it generates. If post-filtering " \ | |
| 105 "the percentage of retained entries is over this threshold " \ | |
| 106 "the buffer will be enqueued for processing. A value of 0 " \ | |
| 107 "specifies that mutator threads should not do such filtering.") \ | |
| 108 \ | |
| 342 | 109 develop(intx, G1ExtraRegionSurvRate, 33, \ |
| 110 "If the young survival rate is S, and there's room left in " \ | |
| 111 "to-space, we will allow regions whose survival rate is up to " \ | |
| 112 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
| 113 \ | |
| 114 develop(intx, G1InitYoungSurvRatio, 50, \ | |
| 115 "Expected Survival Rate for newly allocated bytes") \ | |
| 116 \ | |
| 117 develop(bool, G1SATBPrintStubs, false, \ | |
| 118 "If true, print generated stubs for the SATB barrier") \ | |
| 119 \ | |
| 1282 | 120 experimental(intx, G1ExpandByPercentOfAvailable, 20, \ |
| 342 | 121 "When expanding, % of uncommitted space to claim.") \ |
| 122 \ | |
| 123 develop(bool, G1RSBarrierRegionFilter, true, \ | |
| 124 "If true, generate region filtering code in RS barrier") \ | |
| 125 \ | |
| 126 develop(bool, G1RSBarrierNullFilter, true, \ | |
| 127 "If true, generate null-pointer filtering code in RS barrier") \ | |
| 128 \ | |
| 129 develop(bool, G1PrintCTFilterStats, false, \ | |
| 130 "If true, print stats on RS filtering effectiveness") \ | |
| 131 \ | |
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132 develop(bool, G1DeferredRSUpdate, true, \ |
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133 "If true, use deferred RS updates") \ |
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134 \ |
| 342 | 135 develop(bool, G1RSLogCheckCardTable, false, \ |
| 136 "If true, verify that no dirty cards remain after RS log " \ | |
| 137 "processing.") \ | |
| 138 \ | |
| 139 develop(bool, G1RSCountHisto, false, \ | |
| 140 "If true, print a histogram of RS occupancies after each pause") \ | |
| 141 \ | |
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142 product(bool, G1PrintRegionLivenessInfo, false, \ |
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143 "Prints the liveness information for all regions in the heap " \ |
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144 "at the end of a marking cycle.") \ |
| 342 | 145 \ |
| 146 develop(bool, G1PrintParCleanupStats, false, \ | |
| 147 "When true, print extra stats about parallel cleanup.") \ | |
| 148 \ | |
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149 product(intx, G1UpdateBufferSize, 256, \ |
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150 "Size of an update buffer") \ |
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151 \ |
| 1282 | 152 product(intx, G1ConcRefinementYellowZone, 0, \ |
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153 "Number of enqueued update buffers that will " \ |
| 1111 | 154 "trigger concurrent processing. Will be selected ergonomically " \ |
| 155 "by default.") \ | |
| 156 \ | |
| 1282 | 157 product(intx, G1ConcRefinementRedZone, 0, \ |
| 1111 | 158 "Maximum number of enqueued update buffers before mutator " \ |
| 159 "threads start processing new ones instead of enqueueing them. " \ | |
| 160 "Will be selected ergonomically by default. Zero will disable " \ | |
| 161 "concurrent processing.") \ | |
| 162 \ | |
| 1282 | 163 product(intx, G1ConcRefinementGreenZone, 0, \ |
| 1111 | 164 "The number of update buffers that are left in the queue by the " \ |
| 165 "concurrent processing threads. Will be selected ergonomically " \ | |
| 166 "by default.") \ | |
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167 \ |
| 1282 | 168 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ |
| 1111 | 169 "The last concurrent refinement thread wakes up every " \ |
| 170 "specified number of milliseconds to do miscellaneous work.") \ | |
| 171 \ | |
| 1282 | 172 product(intx, G1ConcRefinementThresholdStep, 0, \ |
| 1111 | 173 "Each time the rset update queue increases by this amount " \ |
| 174 "activate the next refinement thread if available. " \ | |
| 175 "Will be selected ergonomically by default.") \ | |
| 176 \ | |
| 1282 | 177 product(intx, G1RSetUpdatingPauseTimePercent, 10, \ |
| 1111 | 178 "A target percentage of time that is allowed to be spend on " \ |
| 179 "process RS update buffers during the collection pause.") \ | |
| 180 \ | |
| 1282 | 181 product(bool, G1UseAdaptiveConcRefinement, true, \ |
| 1111 | 182 "Select green, yellow and red zones adaptively to meet the " \ |
| 183 "the pause requirements.") \ | |
| 342 | 184 \ |
| 185 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
| 186 "Log base 2 of the length of conc RS hot-card cache.") \ | |
| 187 \ | |
| 751 | 188 develop(intx, G1ConcRSHotCardLimit, 4, \ |
| 342 | 189 "The threshold that defines (>=) a hot card.") \ |
| 190 \ | |
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191 develop(intx, G1MaxHotCardCountSizePercent, 25, \ |
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192 "The maximum size of the hot card count cache as a " \ |
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193 "percentage of the number of cards for the maximum heap.") \ |
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194 \ |
| 342 | 195 develop(bool, G1PrintOopAppls, false, \ |
| 196 "When true, print applications of closures to external locs.") \ | |
| 197 \ | |
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198 develop(intx, G1RSetRegionEntriesBase, 256, \ |
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199 "Max number of regions in a fine-grain table per MB.") \ |
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200 \ |
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201 product(intx, G1RSetRegionEntries, 0, \ |
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202 "Max number of regions for which we keep bitmaps." \ |
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203 "Will be set ergonomically by default") \ |
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204 \ |
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205 develop(intx, G1RSetSparseRegionEntriesBase, 4, \ |
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206 "Max number of entries per region in a sparse table " \ |
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207 "per MB.") \ |
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208 \ |
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209 product(intx, G1RSetSparseRegionEntries, 0, \ |
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210 "Max number of entries per region in a sparse table." \ |
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211 "Will be set ergonomically by default.") \ |
| 342 | 212 \ |
| 213 develop(bool, G1RecordHRRSOops, false, \ | |
| 214 "When true, record recent calls to rem set operations.") \ | |
| 215 \ | |
| 216 develop(bool, G1RecordHRRSEvents, false, \ | |
| 217 "When true, record recent calls to rem set operations.") \ | |
| 218 \ | |
| 219 develop(intx, G1MaxVerifyFailures, -1, \ | |
| 220 "The maximum number of verification failrues to print. " \ | |
| 221 "-1 means print all.") \ | |
| 222 \ | |
| 223 develop(bool, G1ScrubRemSets, true, \ | |
| 224 "When true, do RS scrubbing after cleanup.") \ | |
| 225 \ | |
| 226 develop(bool, G1RSScrubVerbose, false, \ | |
| 227 "When true, do RS scrubbing with verbose output.") \ | |
| 228 \ | |
| 229 develop(bool, G1YoungSurvRateVerbose, false, \ | |
| 230 "print out the survival rate of young regions according to age.") \ | |
| 231 \ | |
| 232 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
| 233 "the number of regions for which we'll print a surv rate " \ | |
| 234 "summary.") \ | |
| 235 \ | |
| 1282 | 236 product(intx, G1ReservePercent, 10, \ |
| 342 | 237 "It determines the minimum reserve we should have in the heap " \ |
| 238 "to minimize the probability of promotion failure.") \ | |
| 239 \ | |
| 1282 | 240 diagnostic(bool, G1PrintHeapRegions, false, \ |
| 342 | 241 "If set G1 will print information on which regions are being " \ |
| 242 "allocated and which are reclaimed.") \ | |
| 243 \ | |
| 244 develop(bool, G1HRRSUseSparseTable, true, \ | |
| 245 "When true, use sparse table to save space.") \ | |
| 246 \ | |
| 247 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
| 248 "Forces flushing of log buffers before verification.") \ | |
| 249 \ | |
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250 develop(bool, G1FailOnFPError, false, \ |
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251 "When set, G1 will fail when it encounters an FP 'error', " \ |
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252 "so as to allow debugging") \ |
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253 \ |
| 751 | 254 develop(bool, G1FixedTenuringThreshold, false, \ |
| 545 | 255 "When set, G1 will not adjust the tenuring threshold") \ |
| 256 \ | |
| 751 | 257 develop(bool, G1FixedEdenSize, false, \ |
| 545 | 258 "When set, G1 will not allocate unused survivor space regions") \ |
| 259 \ | |
| 751 | 260 develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
| 545 | 261 "If non-0 is the size of the G1 survivor space, " \ |
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262 "otherwise SurvivorRatio is used to determine the size") \ |
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263 \ |
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264 product(uintx, G1HeapRegionSize, 0, \ |
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265 "Size of the G1 regions.") \ |
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266 \ |
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267 experimental(bool, G1UseParallelRSetUpdating, true, \ |
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268 "Enables the parallelization of remembered set updating " \ |
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269 "during evacuation pauses") \ |
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270 \ |
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271 experimental(bool, G1UseParallelRSetScanning, true, \ |
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272 "Enables the parallelization of remembered set scanning " \ |
| 794 | 273 "during evacuation pauses") \ |
| 274 \ | |
| 1282 | 275 product(uintx, G1ConcRefinementThreads, 0, \ |
| 794 | 276 "If non-0 is the number of parallel rem set update threads, " \ |
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277 "otherwise the value is determined ergonomically.") \ |
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278 \ |
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279 develop(intx, G1CardCountCacheExpandThreshold, 16, \ |
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280 "Expand the card count cache if the number of collisions for " \ |
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281 "a particular entry exceeds this value.") \ |
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282 \ |
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283 develop(bool, G1VerifyCTCleanup, false, \ |
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284 "Verify card table cleanup.") \ |
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285 \ |
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286 product(uintx, G1RSetScanBlockSize, 64, \ |
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287 "Size of a work unit of cards claimed by a worker thread" \ |
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288 "during RSet scanning.") \ |
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289 \ |
| 2152 | 290 develop(uintx, G1SecondaryFreeListAppendLength, 5, \ |
| 291 "The number of regions we will add to the secondary free list " \ | |
| 292 "at every append operation") \ | |
| 293 \ | |
| 294 develop(bool, G1ConcRegionFreeingVerbose, false, \ | |
| 295 "Enables verboseness during concurrent region freeing") \ | |
| 296 \ | |
| 297 develop(bool, G1StressConcRegionFreeing, false, \ | |
| 298 "It stresses the concurrent region freeing operation") \ | |
| 299 \ | |
| 300 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ | |
| 301 "Artificial delay during concurrent region freeing") \ | |
| 302 \ | |
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303 develop(uintx, G1DummyRegionsPerGC, 0, \ |
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304 "The number of dummy regions G1 will allocate at the end of " \ |
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305 "each evacuation pause in order to artificially fill up the " \ |
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306 "heap and stress the marking implementation.") \ |
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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 |