Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 883:27f6a9b9c311
6864886: G1: rename -XX parameters related to update buffers
Summary: renaming a couple of update buffer-related parameters to make them more understandable and consistent.
Reviewed-by: iveresov, ysr
| author | tonyp |
|---|---|
| date | Wed, 29 Jul 2009 11:01:26 -0400 |
| parents | df6caf649ff7 |
| children | 83b687ce3090 |
| 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 \ | |
| 751 | 37 develop(intx, G1MarkingOverheadPercent, 0, \ |
| 342 | 38 "Overhead of concurrent marking") \ |
| 39 \ | |
| 751 | 40 develop(bool, G1AccountConcurrentOverhead, false, \ |
| 342 | 41 "Whether soft real-time compliance in G1 will take into account" \ |
| 42 "concurrent overhead") \ | |
| 43 \ | |
| 44 product(intx, G1YoungGenSize, 0, \ | |
| 45 "Size of the G1 young generation, 0 is the adaptive policy") \ | |
| 46 \ | |
| 751 | 47 develop(bool, G1Gen, true, \ |
| 342 | 48 "If true, it will enable the generational G1") \ |
| 49 \ | |
| 751 | 50 develop(intx, G1GCPercent, 10, \ |
| 342 | 51 "The desired percent time spent on GC") \ |
| 52 \ | |
| 751 | 53 develop(intx, G1PolicyVerbose, 0, \ |
| 342 | 54 "The verbosity level on G1 policy decisions") \ |
| 55 \ | |
| 56 develop(bool, G1UseHRIntoRS, true, \ | |
| 57 "Determines whether the 'advanced' HR Into rem set is used.") \ | |
| 58 \ | |
| 59 develop(intx, G1MarkingVerboseLevel, 0, \ | |
| 60 "Level (0-4) of verboseness of the marking code") \ | |
| 61 \ | |
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62 develop(bool, G1VerifyConcMarkPrintReachable, false, \ |
| 342 | 63 "If conc mark verification fails, print reachable objects") \ |
| 64 \ | |
| 65 develop(bool, G1TraceMarkStackOverflow, false, \ | |
| 66 "If true, extra debugging code for CM restart for ovflw.") \ | |
| 67 \ | |
| 68 develop(intx, G1PausesBtwnConcMark, -1, \ | |
| 69 "If positive, fixed number of pauses between conc markings") \ | |
| 70 \ | |
| 751 | 71 diagnostic(bool, G1SummarizeConcurrentMark, false, \ |
| 342 | 72 "Summarize concurrent mark info") \ |
| 73 \ | |
| 751 | 74 diagnostic(bool, G1SummarizeRSetStats, false, \ |
| 342 | 75 "Summarize remembered set processing info") \ |
| 76 \ | |
| 751 | 77 diagnostic(bool, G1SummarizeZFStats, false, \ |
| 342 | 78 "Summarize zero-filling info") \ |
| 79 \ | |
| 751 | 80 develop(bool, G1TraceConcurrentRefinement, false, \ |
| 342 | 81 "Trace G1 concurrent refinement") \ |
| 82 \ | |
| 751 | 83 product(intx, G1MarkStackSize, 2 * 1024 * 1024, \ |
| 342 | 84 "Size of the mark stack for concurrent marking.") \ |
| 85 \ | |
| 751 | 86 product(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
| 342 | 87 "Size of the region stack for concurrent marking.") \ |
| 88 \ | |
| 89 develop(bool, G1ConcRefine, true, \ | |
| 90 "If true, run concurrent rem set refinement for G1") \ | |
| 91 \ | |
| 92 develop(intx, G1ConcRefineTargTraversals, 4, \ | |
| 93 "Number of concurrent refinement we try to achieve") \ | |
| 94 \ | |
| 95 develop(intx, G1ConcRefineInitialDelta, 4, \ | |
| 96 "Number of heap regions of alloc ahead of starting collection " \ | |
| 97 "pause to start concurrent refinement (initially)") \ | |
| 98 \ | |
| 751 | 99 develop(bool, G1SmoothConcRefine, true, \ |
| 342 | 100 "Attempts to smooth out the overhead of concurrent refinement") \ |
| 101 \ | |
| 102 develop(bool, G1ConcZeroFill, true, \ | |
| 103 "If true, run concurrent zero-filling thread") \ | |
| 104 \ | |
| 105 develop(intx, G1ConcZFMaxRegions, 1, \ | |
| 106 "Stop zero-filling when # of zf'd regions reaches") \ | |
| 107 \ | |
| 108 product(intx, G1SteadyStateUsed, 90, \ | |
| 109 "If non-0, try to maintain 'used' at this pct (of max)") \ | |
| 110 \ | |
| 111 product(intx, G1SteadyStateUsedDelta, 30, \ | |
| 112 "If G1SteadyStateUsed is non-0, then do pause this number of " \ | |
| 113 "of percentage points earlier if no marking is in progress.") \ | |
| 114 \ | |
| 115 develop(bool, G1SATBBarrierPrintNullPreVals, false, \ | |
| 116 "If true, count frac of ptr writes with null pre-vals.") \ | |
| 117 \ | |
| 118 product(intx, G1SATBLogBufferSize, 1*K, \ | |
| 119 "Number of entries in an SATB log buffer.") \ | |
| 120 \ | |
| 121 product(intx, G1SATBProcessCompletedThreshold, 20, \ | |
| 122 "Number of completed buffers that triggers log processing.") \ | |
| 123 \ | |
| 124 develop(intx, G1ExtraRegionSurvRate, 33, \ | |
| 125 "If the young survival rate is S, and there's room left in " \ | |
| 126 "to-space, we will allow regions whose survival rate is up to " \ | |
| 127 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
| 128 \ | |
| 129 develop(intx, G1InitYoungSurvRatio, 50, \ | |
| 130 "Expected Survival Rate for newly allocated bytes") \ | |
| 131 \ | |
| 132 develop(bool, G1SATBPrintStubs, false, \ | |
| 133 "If true, print generated stubs for the SATB barrier") \ | |
| 134 \ | |
| 751 | 135 product(intx, G1ExpandByPercentOfAvailable, 20, \ |
| 342 | 136 "When expanding, % of uncommitted space to claim.") \ |
| 137 \ | |
| 138 develop(bool, G1RSBarrierRegionFilter, true, \ | |
| 139 "If true, generate region filtering code in RS barrier") \ | |
| 140 \ | |
| 141 develop(bool, G1RSBarrierNullFilter, true, \ | |
| 142 "If true, generate null-pointer filtering code in RS barrier") \ | |
| 143 \ | |
| 144 develop(bool, G1PrintCTFilterStats, false, \ | |
| 145 "If true, print stats on RS filtering effectiveness") \ | |
| 146 \ | |
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147 develop(bool, G1DeferredRSUpdate, true, \ |
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148 "If true, use deferred RS updates") \ |
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149 \ |
| 342 | 150 develop(bool, G1RSLogCheckCardTable, false, \ |
| 151 "If true, verify that no dirty cards remain after RS log " \ | |
| 152 "processing.") \ | |
| 153 \ | |
| 154 develop(bool, G1RSCountHisto, false, \ | |
| 155 "If true, print a histogram of RS occupancies after each pause") \ | |
| 156 \ | |
| 157 develop(intx, G1PrintRegionLivenessInfo, 0, \ | |
| 158 "When > 0, print the occupancies of the <n> best and worst" \ | |
| 159 "regions.") \ | |
| 160 \ | |
| 161 develop(bool, G1PrintParCleanupStats, false, \ | |
| 162 "When true, print extra stats about parallel cleanup.") \ | |
| 163 \ | |
| 164 develop(bool, G1DisablePreBarrier, false, \ | |
| 165 "Disable generation of pre-barrier (i.e., marking barrier) ") \ | |
| 166 \ | |
| 167 develop(bool, G1DisablePostBarrier, false, \ | |
| 168 "Disable generation of post-barrier (i.e., RS barrier) ") \ | |
| 169 \ | |
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170 product(intx, G1UpdateBufferSize, 256, \ |
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171 "Size of an update buffer") \ |
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172 \ |
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173 product(intx, G1UpdateBufferQueueProcessingThreshold, 5, \ |
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174 "Number of enqueued update buffers that will " \ |
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175 "trigger concurrent processing") \ |
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176 \ |
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177 product(intx, G1UpdateBufferQueueMaxLength, 30, \ |
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178 "Maximum number of enqueued update buffers before mutator " \ |
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179 "threads start processing new ones instead of enqueueing them") \ |
| 342 | 180 \ |
| 181 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
| 182 "Log base 2 of the length of conc RS hot-card cache.") \ | |
| 183 \ | |
| 751 | 184 develop(bool, G1ConcRSCountTraversals, false, \ |
| 342 | 185 "If true, gather data about the number of times CR traverses " \ |
| 186 "cards ") \ | |
| 187 \ | |
| 751 | 188 develop(intx, G1ConcRSHotCardLimit, 4, \ |
| 342 | 189 "The threshold that defines (>=) a hot card.") \ |
| 190 \ | |
| 191 develop(bool, G1PrintOopAppls, false, \ | |
| 192 "When true, print applications of closures to external locs.") \ | |
| 193 \ | |
| 751 | 194 develop(intx, G1LogRSRegionEntries, 7, \ |
| 342 | 195 "Log_2 of max number of regions for which we keep bitmaps.") \ |
| 196 \ | |
| 197 develop(bool, G1RecordHRRSOops, false, \ | |
| 198 "When true, record recent calls to rem set operations.") \ | |
| 199 \ | |
| 200 develop(bool, G1RecordHRRSEvents, false, \ | |
| 201 "When true, record recent calls to rem set operations.") \ | |
| 202 \ | |
| 203 develop(intx, G1MaxVerifyFailures, -1, \ | |
| 204 "The maximum number of verification failrues to print. " \ | |
| 205 "-1 means print all.") \ | |
| 206 \ | |
| 207 develop(bool, G1ScrubRemSets, true, \ | |
| 208 "When true, do RS scrubbing after cleanup.") \ | |
| 209 \ | |
| 210 develop(bool, G1RSScrubVerbose, false, \ | |
| 211 "When true, do RS scrubbing with verbose output.") \ | |
| 212 \ | |
| 213 develop(bool, G1YoungSurvRateVerbose, false, \ | |
| 214 "print out the survival rate of young regions according to age.") \ | |
| 215 \ | |
| 216 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
| 217 "the number of regions for which we'll print a surv rate " \ | |
| 218 "summary.") \ | |
| 219 \ | |
| 220 product(bool, G1UseScanOnlyPrefix, false, \ | |
| 221 "It determines whether the system will calculate an optimum " \ | |
| 222 "scan-only set.") \ | |
| 223 \ | |
| 751 | 224 product(intx, G1MinReservePercent, 10, \ |
| 342 | 225 "It determines the minimum reserve we should have in the heap " \ |
| 226 "to minimize the probability of promotion failure.") \ | |
| 227 \ | |
| 751 | 228 diagnostic(bool, G1PrintRegions, false, \ |
| 342 | 229 "If set G1 will print information on which regions are being " \ |
| 230 "allocated and which are reclaimed.") \ | |
| 231 \ | |
| 232 develop(bool, G1HRRSUseSparseTable, true, \ | |
| 233 "When true, use sparse table to save space.") \ | |
| 234 \ | |
| 235 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
| 236 "Forces flushing of log buffers before verification.") \ | |
| 237 \ | |
| 751 | 238 product(bool, G1UseSurvivorSpaces, true, \ |
| 545 | 239 "When true, use survivor space.") \ |
| 240 \ | |
| 751 | 241 develop(bool, G1FixedTenuringThreshold, false, \ |
| 545 | 242 "When set, G1 will not adjust the tenuring threshold") \ |
| 243 \ | |
| 751 | 244 develop(bool, G1FixedEdenSize, false, \ |
| 545 | 245 "When set, G1 will not allocate unused survivor space regions") \ |
| 246 \ | |
| 751 | 247 develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
| 545 | 248 "If non-0 is the size of the G1 survivor space, " \ |
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249 "otherwise SurvivorRatio is used to determine the size") \ |
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250 \ |
| 751 | 251 experimental(bool, G1ParallelRSetUpdatingEnabled, false, \ |
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252 "Enables the parallelization of remembered set updating " \ |
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253 "during evacuation pauses") \ |
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254 \ |
| 751 | 255 experimental(bool, G1ParallelRSetScanningEnabled, false, \ |
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256 "Enables the parallelization of remembered set scanning " \ |
| 794 | 257 "during evacuation pauses") \ |
| 258 \ | |
| 259 product(uintx, G1ParallelRSetThreads, 0, \ | |
| 260 "If non-0 is the number of parallel rem set update threads, " \ | |
| 261 "otherwise the value is determined ergonomically.") | |
| 342 | 262 |
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263 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) |