Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/gc_implementation/g1/g1_globals.hpp
src/share/vm/gc_implementation/g1/g1_globals.hpp
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| 1 /* | |
| 2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 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 | |
| 29 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct, manageable, product_rw) \ | |
| 30 \ | |
| 31 product(intx, ParallelGCG1AllocBufferSize, 4*K, \ | |
| 32 "Size of parallel G1 allocation buffers in to-space.") \ | |
| 33 \ | |
| 34 product(intx, G1TimeSliceMS, 500, \ | |
| 35 "Time slice for MMU specification") \ | |
| 36 \ | |
| 37 product(intx, G1MaxPauseTimeMS, 200, \ | |
| 38 "Max GC time per MMU time slice") \ | |
| 39 \ | |
| 40 product(intx, G1ConfidencePerc, 50, \ | |
| 41 "Confidence level for MMU/pause predictions") \ | |
| 42 \ | |
| 43 product(intx, G1MarkingOverheadPerc, 0, \ | |
| 44 "Overhead of concurrent marking") \ | |
| 45 \ | |
| 46 product(bool, G1AccountConcurrentOverhead, false, \ | |
| 47 "Whether soft real-time compliance in G1 will take into account" \ | |
| 48 "concurrent overhead") \ | |
| 49 \ | |
| 50 product(intx, G1YoungGenSize, 0, \ | |
| 51 "Size of the G1 young generation, 0 is the adaptive policy") \ | |
| 52 \ | |
| 53 product(bool, G1Gen, true, \ | |
| 54 "If true, it will enable the generational G1") \ | |
| 55 \ | |
| 56 develop(intx, G1GCPct, 10, \ | |
| 57 "The desired percent time spent on GC") \ | |
| 58 \ | |
| 59 product(intx, G1PolicyVerbose, 0, \ | |
| 60 "The verbosity level on G1 policy decisions") \ | |
| 61 \ | |
| 62 develop(bool, G1UseHRIntoRS, true, \ | |
| 63 "Determines whether the 'advanced' HR Into rem set is used.") \ | |
| 64 \ | |
| 65 product(bool, G1VerifyRemSet, false, \ | |
| 66 "If true, verify the rem set functioning at each GC") \ | |
| 67 \ | |
| 68 product(bool, G1VerifyConcMark, false, \ | |
| 69 "If true, verify the conc marking code at full GC time") \ | |
| 70 \ | |
| 71 develop(intx, G1MarkingVerboseLevel, 0, \ | |
| 72 "Level (0-4) of verboseness of the marking code") \ | |
| 73 \ | |
| 74 develop(bool, G1VerifyConcMarkPrintReachable, true, \ | |
| 75 "If conc mark verification fails, print reachable objects") \ | |
| 76 \ | |
| 77 develop(bool, G1TraceMarkStackOverflow, false, \ | |
| 78 "If true, extra debugging code for CM restart for ovflw.") \ | |
| 79 \ | |
| 80 product(bool, G1VerifyMarkingInEvac, false, \ | |
| 81 "If true, verify marking info during evacuation") \ | |
| 82 \ | |
| 83 develop(intx, G1PausesBtwnConcMark, -1, \ | |
| 84 "If positive, fixed number of pauses between conc markings") \ | |
| 85 \ | |
| 86 product(intx, G1EfficiencyPctCausesMark, 80, \ | |
| 87 "The cum gc efficiency since mark fall-off that causes " \ | |
| 88 "new marking") \ | |
| 89 \ | |
| 90 product(bool, TraceConcurrentMark, false, \ | |
| 91 "Trace concurrent mark") \ | |
| 92 \ | |
| 93 product(bool, SummarizeG1ConcMark, false, \ | |
| 94 "Summarize concurrent mark info") \ | |
| 95 \ | |
| 96 product(bool, SummarizeG1RSStats, false, \ | |
| 97 "Summarize remembered set processing info") \ | |
| 98 \ | |
| 99 product(bool, SummarizeG1ZFStats, false, \ | |
| 100 "Summarize zero-filling info") \ | |
| 101 \ | |
| 102 product(bool, TraceG1Refine, false, \ | |
| 103 "Trace G1 concurrent refinement") \ | |
| 104 \ | |
| 105 develop(bool, G1ConcMark, true, \ | |
| 106 "If true, run concurrent marking for G1") \ | |
| 107 \ | |
| 108 product(intx, G1CMStackSize, 2 * 1024 * 1024, \ | |
| 109 "Size of the mark stack for concurrent marking.") \ | |
| 110 \ | |
| 111 product(intx, G1CMRegionStackSize, 1024 * 1024, \ | |
| 112 "Size of the region stack for concurrent marking.") \ | |
| 113 \ | |
| 114 develop(bool, G1ConcRefine, true, \ | |
| 115 "If true, run concurrent rem set refinement for G1") \ | |
| 116 \ | |
| 117 develop(intx, G1ConcRefineTargTraversals, 4, \ | |
| 118 "Number of concurrent refinement we try to achieve") \ | |
| 119 \ | |
| 120 develop(intx, G1ConcRefineInitialDelta, 4, \ | |
| 121 "Number of heap regions of alloc ahead of starting collection " \ | |
| 122 "pause to start concurrent refinement (initially)") \ | |
| 123 \ | |
| 124 product(bool, G1SmoothConcRefine, true, \ | |
| 125 "Attempts to smooth out the overhead of concurrent refinement") \ | |
| 126 \ | |
| 127 develop(bool, G1ConcZeroFill, true, \ | |
| 128 "If true, run concurrent zero-filling thread") \ | |
| 129 \ | |
| 130 develop(intx, G1ConcZFMaxRegions, 1, \ | |
| 131 "Stop zero-filling when # of zf'd regions reaches") \ | |
| 132 \ | |
| 133 product(intx, G1SteadyStateUsed, 90, \ | |
| 134 "If non-0, try to maintain 'used' at this pct (of max)") \ | |
| 135 \ | |
| 136 product(intx, G1SteadyStateUsedDelta, 30, \ | |
| 137 "If G1SteadyStateUsed is non-0, then do pause this number of " \ | |
| 138 "of percentage points earlier if no marking is in progress.") \ | |
| 139 \ | |
| 140 develop(bool, G1SATBBarrierPrintNullPreVals, false, \ | |
| 141 "If true, count frac of ptr writes with null pre-vals.") \ | |
| 142 \ | |
| 143 product(intx, G1SATBLogBufferSize, 1*K, \ | |
| 144 "Number of entries in an SATB log buffer.") \ | |
| 145 \ | |
| 146 product(intx, G1SATBProcessCompletedThreshold, 20, \ | |
| 147 "Number of completed buffers that triggers log processing.") \ | |
| 148 \ | |
| 149 develop(intx, G1ExtraRegionSurvRate, 33, \ | |
| 150 "If the young survival rate is S, and there's room left in " \ | |
| 151 "to-space, we will allow regions whose survival rate is up to " \ | |
| 152 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
| 153 \ | |
| 154 develop(intx, G1InitYoungSurvRatio, 50, \ | |
| 155 "Expected Survival Rate for newly allocated bytes") \ | |
| 156 \ | |
| 157 develop(bool, G1SATBPrintStubs, false, \ | |
| 158 "If true, print generated stubs for the SATB barrier") \ | |
| 159 \ | |
| 160 product(intx, G1ExpandByPctOfAvail, 20, \ | |
| 161 "When expanding, % of uncommitted space to claim.") \ | |
| 162 \ | |
| 163 develop(bool, G1RSBarrierRegionFilter, true, \ | |
| 164 "If true, generate region filtering code in RS barrier") \ | |
| 165 \ | |
| 166 develop(bool, G1RSBarrierNullFilter, true, \ | |
| 167 "If true, generate null-pointer filtering code in RS barrier") \ | |
| 168 \ | |
| 169 develop(bool, G1PrintCTFilterStats, false, \ | |
| 170 "If true, print stats on RS filtering effectiveness") \ | |
| 171 \ | |
| 172 develop(bool, G1RSBarrierUseQueue, true, \ | |
| 173 "If true, use queueing RS barrier") \ | |
| 174 \ | |
| 175 develop(bool, G1RSLogCheckCardTable, false, \ | |
| 176 "If true, verify that no dirty cards remain after RS log " \ | |
| 177 "processing.") \ | |
| 178 \ | |
| 179 product(intx, G1MinPausesBetweenMarks, 2, \ | |
| 180 "Number of inefficient pauses necessary to trigger marking.") \ | |
| 181 \ | |
| 182 product(intx, G1InefficientPausePct, 80, \ | |
| 183 "Threshold of an 'inefficient' pauses (as % of cum efficiency.") \ | |
| 184 \ | |
| 185 product(intx, G1RSPopLimit, 32768, \ | |
| 186 "Limit that defines popularity. Should go away! XXX") \ | |
| 187 \ | |
| 188 develop(bool, G1RSCountHisto, false, \ | |
| 189 "If true, print a histogram of RS occupancies after each pause") \ | |
| 190 \ | |
| 191 product(intx, G1ObjPopLimit, 256, \ | |
| 192 "Limit that defines popularity for an object.") \ | |
| 193 \ | |
| 194 product(bool, G1TraceFileOverwrite, false, \ | |
| 195 "Allow the trace file to be overwritten") \ | |
| 196 \ | |
| 197 develop(intx, G1PrintRegionLivenessInfo, 0, \ | |
| 198 "When > 0, print the occupancies of the <n> best and worst" \ | |
| 199 "regions.") \ | |
| 200 \ | |
| 201 develop(bool, G1TracePopularity, false, \ | |
| 202 "When true, provide detailed tracing of popularity.") \ | |
| 203 \ | |
| 204 product(bool, G1SummarizePopularity, false, \ | |
| 205 "When true, provide end-of-run-summarization of popularity.") \ | |
| 206 \ | |
| 207 product(intx, G1NumPopularRegions, 1, \ | |
| 208 "Number of regions reserved to hold popular objects. " \ | |
| 209 "Should go away later.") \ | |
| 210 \ | |
| 211 develop(bool, G1PrintParCleanupStats, false, \ | |
| 212 "When true, print extra stats about parallel cleanup.") \ | |
| 213 \ | |
| 214 product(bool, G1DoAgeCohortChecks, false, \ | |
| 215 "When true, check well-formedness of age cohort structures.") \ | |
| 216 \ | |
| 217 develop(bool, G1DisablePreBarrier, false, \ | |
| 218 "Disable generation of pre-barrier (i.e., marking barrier) ") \ | |
| 219 \ | |
| 220 develop(bool, G1DisablePostBarrier, false, \ | |
| 221 "Disable generation of post-barrier (i.e., RS barrier) ") \ | |
| 222 \ | |
| 223 product(intx, G1DirtyCardQueueMax, 30, \ | |
| 224 "Maximum number of completed RS buffers before mutator threads " \ | |
| 225 "start processing them.") \ | |
| 226 \ | |
| 227 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
| 228 "Log base 2 of the length of conc RS hot-card cache.") \ | |
| 229 \ | |
| 230 product(bool, G1ConcRSCountTraversals, false, \ | |
| 231 "If true, gather data about the number of times CR traverses " \ | |
| 232 "cards ") \ | |
| 233 \ | |
| 234 product(intx, G1ConcRSHotCardLimit, 4, \ | |
| 235 "The threshold that defines (>=) a hot card.") \ | |
| 236 \ | |
| 237 develop(bool, G1PrintOopAppls, false, \ | |
| 238 "When true, print applications of closures to external locs.") \ | |
| 239 \ | |
| 240 product(intx, G1LogRSRegionEntries, 7, \ | |
| 241 "Log_2 of max number of regions for which we keep bitmaps.") \ | |
| 242 \ | |
| 243 develop(bool, G1RecordHRRSOops, false, \ | |
| 244 "When true, record recent calls to rem set operations.") \ | |
| 245 \ | |
| 246 develop(bool, G1RecordHRRSEvents, false, \ | |
| 247 "When true, record recent calls to rem set operations.") \ | |
| 248 \ | |
| 249 develop(intx, G1MaxVerifyFailures, -1, \ | |
| 250 "The maximum number of verification failrues to print. " \ | |
| 251 "-1 means print all.") \ | |
| 252 \ | |
| 253 develop(bool, G1ScrubRemSets, true, \ | |
| 254 "When true, do RS scrubbing after cleanup.") \ | |
| 255 \ | |
| 256 develop(bool, G1RSScrubVerbose, false, \ | |
| 257 "When true, do RS scrubbing with verbose output.") \ | |
| 258 \ | |
| 259 develop(bool, G1YoungSurvRateVerbose, false, \ | |
| 260 "print out the survival rate of young regions according to age.") \ | |
| 261 \ | |
| 262 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
| 263 "the number of regions for which we'll print a surv rate " \ | |
| 264 "summary.") \ | |
| 265 \ | |
| 266 product(bool, G1UseScanOnlyPrefix, false, \ | |
| 267 "It determines whether the system will calculate an optimum " \ | |
| 268 "scan-only set.") \ | |
| 269 \ | |
| 270 product(intx, G1MinReservePerc, 10, \ | |
| 271 "It determines the minimum reserve we should have in the heap " \ | |
| 272 "to minimize the probability of promotion failure.") \ | |
| 273 \ | |
| 274 product(bool, G1TraceRegions, false, \ | |
| 275 "If set G1 will print information on which regions are being " \ | |
| 276 "allocated and which are reclaimed.") \ | |
| 277 \ | |
| 278 develop(bool, G1HRRSUseSparseTable, true, \ | |
| 279 "When true, use sparse table to save space.") \ | |
| 280 \ | |
| 281 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
| 282 "Forces flushing of log buffers before verification.") \ | |
| 283 \ | |
| 284 product(intx, G1MaxSurvivorRegions, 0, \ | |
| 285 "The maximum number of survivor regions") | |
| 286 | |
| 287 G1_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG) |
