Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 1261:0414c1049f15
6923991: G1: improve scalability of RSet scanning
Summary: Implemented block-based work stealing. Moved copying during the rset scanning phase to the main copying phase. Made the size of rset table depend on the region size.
Reviewed-by: apetrusenko, tonyp
| author | iveresov |
|---|---|
| date | Thu, 11 Feb 2010 15:52:19 -0800 |
| parents | 34fb2662f6c2 |
| children | b81f3572f355 |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 579 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // | |
| 26 // Defines all globals flags used by the garbage-first compiler. | |
| 27 // | |
| 28 | |
|
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29 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \ |
| 342 | 30 \ |
| 751 | 31 product(intx, G1ParallelGCAllocBufferSize, 8*K, \ |
| 342 | 32 "Size of parallel G1 allocation buffers in to-space.") \ |
| 33 \ | |
| 751 | 34 product(intx, G1ConfidencePercent, 50, \ |
| 342 | 35 "Confidence level for MMU/pause predictions") \ |
| 36 \ | |
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37 develop(intx, G1MarkingOverheadPercent, 0, \ |
| 342 | 38 "Overhead of concurrent marking") \ |
| 39 \ | |
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40 product(uintx, G1YoungGenSize, 0, \ |
| 342 | 41 "Size of the G1 young generation, 0 is the adaptive policy") \ |
| 42 \ | |
| 751 | 43 develop(bool, G1Gen, true, \ |
| 342 | 44 "If true, it will enable the generational G1") \ |
| 45 \ | |
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46 develop(intx, G1GCPercent, 10, \ |
| 342 | 47 "The desired percent time spent on GC") \ |
| 48 \ | |
| 751 | 49 develop(intx, G1PolicyVerbose, 0, \ |
| 342 | 50 "The verbosity level on G1 policy decisions") \ |
| 51 \ | |
| 52 develop(bool, G1UseHRIntoRS, true, \ | |
| 53 "Determines whether the 'advanced' HR Into rem set is used.") \ | |
| 54 \ | |
| 55 develop(intx, G1MarkingVerboseLevel, 0, \ | |
| 56 "Level (0-4) of verboseness of the marking code") \ | |
| 57 \ | |
| 1044 | 58 develop(bool, G1PrintReachableAtInitialMark, false, \ |
| 59 "Reachable object dump at the initial mark pause") \ | |
| 60 \ | |
| 61 develop(bool, G1VerifyDuringGCPrintReachable, false, \ | |
| 62 "If conc mark verification fails, dump reachable objects") \ | |
| 63 \ | |
| 64 develop(ccstr, G1PrintReachableBaseFile, NULL, \ | |
| 65 "The base file name for the reachable object dumps") \ | |
| 342 | 66 \ |
| 67 develop(bool, G1TraceMarkStackOverflow, false, \ | |
| 68 "If true, extra debugging code for CM restart for ovflw.") \ | |
| 69 \ | |
| 70 develop(intx, G1PausesBtwnConcMark, -1, \ | |
| 71 "If positive, fixed number of pauses between conc markings") \ | |
| 72 \ | |
| 751 | 73 diagnostic(bool, G1SummarizeConcurrentMark, false, \ |
| 342 | 74 "Summarize concurrent mark info") \ |
| 75 \ | |
| 751 | 76 diagnostic(bool, G1SummarizeRSetStats, false, \ |
| 342 | 77 "Summarize remembered set processing info") \ |
| 78 \ | |
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79 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ |
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80 "The period (in number of GCs) at which we will generate " \ |
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81 "update buffer processing info " \ |
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82 "(0 means do not periodically generate this info); " \ |
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83 "it also requires -XX:+G1SummarizeRSetStats") \ |
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84 \ |
| 751 | 85 diagnostic(bool, G1SummarizeZFStats, false, \ |
| 342 | 86 "Summarize zero-filling info") \ |
| 87 \ | |
| 1111 | 88 diagnostic(bool, G1TraceConcurrentRefinement, false, \ |
| 342 | 89 "Trace G1 concurrent refinement") \ |
| 90 \ | |
| 751 | 91 product(intx, G1MarkStackSize, 2 * 1024 * 1024, \ |
| 342 | 92 "Size of the mark stack for concurrent marking.") \ |
| 93 \ | |
| 751 | 94 product(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
| 342 | 95 "Size of the region stack for concurrent marking.") \ |
| 96 \ | |
| 97 develop(bool, G1ConcZeroFill, true, \ | |
| 98 "If true, run concurrent zero-filling thread") \ | |
| 99 \ | |
| 100 develop(intx, G1ConcZFMaxRegions, 1, \ | |
| 101 "Stop zero-filling when # of zf'd regions reaches") \ | |
| 102 \ | |
| 103 product(intx, G1SteadyStateUsed, 90, \ | |
| 104 "If non-0, try to maintain 'used' at this pct (of max)") \ | |
| 105 \ | |
| 106 product(intx, G1SteadyStateUsedDelta, 30, \ | |
| 107 "If G1SteadyStateUsed is non-0, then do pause this number of " \ | |
| 108 "of percentage points earlier if no marking is in progress.") \ | |
| 109 \ | |
| 110 develop(bool, G1SATBBarrierPrintNullPreVals, false, \ | |
| 111 "If true, count frac of ptr writes with null pre-vals.") \ | |
| 112 \ | |
| 113 product(intx, G1SATBLogBufferSize, 1*K, \ | |
| 114 "Number of entries in an SATB log buffer.") \ | |
| 115 \ | |
| 116 product(intx, G1SATBProcessCompletedThreshold, 20, \ | |
| 117 "Number of completed buffers that triggers log processing.") \ | |
| 118 \ | |
| 119 develop(intx, G1ExtraRegionSurvRate, 33, \ | |
| 120 "If the young survival rate is S, and there's room left in " \ | |
| 121 "to-space, we will allow regions whose survival rate is up to " \ | |
| 122 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
| 123 \ | |
| 124 develop(intx, G1InitYoungSurvRatio, 50, \ | |
| 125 "Expected Survival Rate for newly allocated bytes") \ | |
| 126 \ | |
| 127 develop(bool, G1SATBPrintStubs, false, \ | |
| 128 "If true, print generated stubs for the SATB barrier") \ | |
| 129 \ | |
| 751 | 130 product(intx, G1ExpandByPercentOfAvailable, 20, \ |
| 342 | 131 "When expanding, % of uncommitted space to claim.") \ |
| 132 \ | |
| 133 develop(bool, G1RSBarrierRegionFilter, true, \ | |
| 134 "If true, generate region filtering code in RS barrier") \ | |
| 135 \ | |
| 136 develop(bool, G1RSBarrierNullFilter, true, \ | |
| 137 "If true, generate null-pointer filtering code in RS barrier") \ | |
| 138 \ | |
| 139 develop(bool, G1PrintCTFilterStats, false, \ | |
| 140 "If true, print stats on RS filtering effectiveness") \ | |
| 141 \ | |
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142 develop(bool, G1DeferredRSUpdate, true, \ |
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143 "If true, use deferred RS updates") \ |
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144 \ |
| 342 | 145 develop(bool, G1RSLogCheckCardTable, false, \ |
| 146 "If true, verify that no dirty cards remain after RS log " \ | |
| 147 "processing.") \ | |
| 148 \ | |
| 149 develop(bool, G1RSCountHisto, false, \ | |
| 150 "If true, print a histogram of RS occupancies after each pause") \ | |
| 151 \ | |
| 152 develop(intx, G1PrintRegionLivenessInfo, 0, \ | |
| 153 "When > 0, print the occupancies of the <n> best and worst" \ | |
| 154 "regions.") \ | |
| 155 \ | |
| 156 develop(bool, G1PrintParCleanupStats, false, \ | |
| 157 "When true, print extra stats about parallel cleanup.") \ | |
| 158 \ | |
| 159 develop(bool, G1DisablePreBarrier, false, \ | |
| 160 "Disable generation of pre-barrier (i.e., marking barrier) ") \ | |
| 161 \ | |
| 162 develop(bool, G1DisablePostBarrier, false, \ | |
| 163 "Disable generation of post-barrier (i.e., RS barrier) ") \ | |
| 164 \ | |
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165 product(intx, G1UpdateBufferSize, 256, \ |
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166 "Size of an update buffer") \ |
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167 \ |
| 1111 | 168 product(intx, G1ConcRefineYellowZone, 0, \ |
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169 "Number of enqueued update buffers that will " \ |
| 1111 | 170 "trigger concurrent processing. Will be selected ergonomically " \ |
| 171 "by default.") \ | |
| 172 \ | |
| 173 product(intx, G1ConcRefineRedZone, 0, \ | |
| 174 "Maximum number of enqueued update buffers before mutator " \ | |
| 175 "threads start processing new ones instead of enqueueing them. " \ | |
| 176 "Will be selected ergonomically by default. Zero will disable " \ | |
| 177 "concurrent processing.") \ | |
| 178 \ | |
| 179 product(intx, G1ConcRefineGreenZone, 0, \ | |
| 180 "The number of update buffers that are left in the queue by the " \ | |
| 181 "concurrent processing threads. Will be selected ergonomically " \ | |
| 182 "by default.") \ | |
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183 \ |
| 1111 | 184 product(intx, G1ConcRefineServiceInterval, 300, \ |
| 185 "The last concurrent refinement thread wakes up every " \ | |
| 186 "specified number of milliseconds to do miscellaneous work.") \ | |
| 187 \ | |
| 188 product(intx, G1ConcRefineThresholdStep, 0, \ | |
| 189 "Each time the rset update queue increases by this amount " \ | |
| 190 "activate the next refinement thread if available. " \ | |
| 191 "Will be selected ergonomically by default.") \ | |
| 192 \ | |
| 193 product(intx, G1RSUpdatePauseFractionPercent, 10, \ | |
| 194 "A target percentage of time that is allowed to be spend on " \ | |
| 195 "process RS update buffers during the collection pause.") \ | |
| 196 \ | |
| 197 product(bool, G1AdaptiveConcRefine, true, \ | |
| 198 "Select green, yellow and red zones adaptively to meet the " \ | |
| 199 "the pause requirements.") \ | |
| 342 | 200 \ |
| 201 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
| 202 "Log base 2 of the length of conc RS hot-card cache.") \ | |
| 203 \ | |
| 751 | 204 develop(intx, G1ConcRSHotCardLimit, 4, \ |
| 342 | 205 "The threshold that defines (>=) a hot card.") \ |
| 206 \ | |
| 207 develop(bool, G1PrintOopAppls, false, \ | |
| 208 "When true, print applications of closures to external locs.") \ | |
| 209 \ | |
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210 develop(intx, G1RSetRegionEntriesBase, 256, \ |
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211 "Max number of regions in a fine-grain table per MB.") \ |
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212 \ |
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213 product(intx, G1RSetRegionEntries, 0, \ |
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214 "Max number of regions for which we keep bitmaps." \ |
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215 "Will be set ergonomically by default") \ |
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216 \ |
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217 develop(intx, G1RSetSparseRegionEntriesBase, 4, \ |
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218 "Max number of entries per region in a sparse table " \ |
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219 "per MB.") \ |
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220 \ |
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221 product(intx, G1RSetSparseRegionEntries, 0, \ |
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222 "Max number of entries per region in a sparse table." \ |
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223 "Will be set ergonomically by default.") \ |
| 342 | 224 \ |
| 225 develop(bool, G1RecordHRRSOops, false, \ | |
| 226 "When true, record recent calls to rem set operations.") \ | |
| 227 \ | |
| 228 develop(bool, G1RecordHRRSEvents, false, \ | |
| 229 "When true, record recent calls to rem set operations.") \ | |
| 230 \ | |
| 231 develop(intx, G1MaxVerifyFailures, -1, \ | |
| 232 "The maximum number of verification failrues to print. " \ | |
| 233 "-1 means print all.") \ | |
| 234 \ | |
| 235 develop(bool, G1ScrubRemSets, true, \ | |
| 236 "When true, do RS scrubbing after cleanup.") \ | |
| 237 \ | |
| 238 develop(bool, G1RSScrubVerbose, false, \ | |
| 239 "When true, do RS scrubbing with verbose output.") \ | |
| 240 \ | |
| 241 develop(bool, G1YoungSurvRateVerbose, false, \ | |
| 242 "print out the survival rate of young regions according to age.") \ | |
| 243 \ | |
| 244 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
| 245 "the number of regions for which we'll print a surv rate " \ | |
| 246 "summary.") \ | |
| 247 \ | |
| 248 product(bool, G1UseScanOnlyPrefix, false, \ | |
| 249 "It determines whether the system will calculate an optimum " \ | |
| 250 "scan-only set.") \ | |
| 251 \ | |
| 751 | 252 product(intx, G1MinReservePercent, 10, \ |
| 342 | 253 "It determines the minimum reserve we should have in the heap " \ |
| 254 "to minimize the probability of promotion failure.") \ | |
| 255 \ | |
| 751 | 256 diagnostic(bool, G1PrintRegions, false, \ |
| 342 | 257 "If set G1 will print information on which regions are being " \ |
| 258 "allocated and which are reclaimed.") \ | |
| 259 \ | |
| 260 develop(bool, G1HRRSUseSparseTable, true, \ | |
| 261 "When true, use sparse table to save space.") \ | |
| 262 \ | |
| 263 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
| 264 "Forces flushing of log buffers before verification.") \ | |
| 265 \ | |
| 751 | 266 product(bool, G1UseSurvivorSpaces, true, \ |
| 545 | 267 "When true, use survivor space.") \ |
| 268 \ | |
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269 develop(bool, G1FailOnFPError, false, \ |
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270 "When set, G1 will fail when it encounters an FP 'error', " \ |
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271 "so as to allow debugging") \ |
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272 \ |
| 751 | 273 develop(bool, G1FixedTenuringThreshold, false, \ |
| 545 | 274 "When set, G1 will not adjust the tenuring threshold") \ |
| 275 \ | |
| 751 | 276 develop(bool, G1FixedEdenSize, false, \ |
| 545 | 277 "When set, G1 will not allocate unused survivor space regions") \ |
| 278 \ | |
| 751 | 279 develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
| 545 | 280 "If non-0 is the size of the G1 survivor space, " \ |
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281 "otherwise SurvivorRatio is used to determine the size") \ |
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282 \ |
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283 product(bool, G1ForgetfulMMUTracker, false, \ |
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284 "If the MMU tracker's memory is full, forget the oldest entry") \ |
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285 \ |
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286 product(uintx, G1HeapRegionSize, 0, \ |
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287 "Size of the G1 regions.") \ |
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288 \ |
| 751 | 289 experimental(bool, G1ParallelRSetUpdatingEnabled, false, \ |
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290 "Enables the parallelization of remembered set updating " \ |
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291 "during evacuation pauses") \ |
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292 \ |
| 751 | 293 experimental(bool, G1ParallelRSetScanningEnabled, false, \ |
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294 "Enables the parallelization of remembered set scanning " \ |
| 794 | 295 "during evacuation pauses") \ |
| 296 \ | |
| 297 product(uintx, G1ParallelRSetThreads, 0, \ | |
| 298 "If non-0 is the number of parallel rem set update threads, " \ | |
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299 "otherwise the value is determined ergonomically.") \ |
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300 \ |
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301 develop(intx, G1CardCountCacheExpandThreshold, 16, \ |
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302 "Expand the card count cache if the number of collisions for " \ |
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303 "a particular entry exceeds this value.") \ |
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304 \ |
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305 develop(bool, G1VerifyCTCleanup, false, \ |
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306 "Verify card table cleanup.") \ |
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307 \ |
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308 product(uintx, G1RSetScanBlockSize, 64, \ |
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309 "Size of a work unit of cards claimed by a worker thread" \ |
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310 "during RSet scanning.") \ |
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311 \ |
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312 develop(bool, ReduceInitialCardMarksForG1, false, \ |
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313 "When ReduceInitialCardMarks is true, this flag setting " \ |
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314 " controls whether G1 allows the RICM optimization") |
| 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) |