annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 2923:1cbe7978b021

7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx Summary: Use a percentage of -Xms as min and another percentage of -Xmx as max for the young gen size Reviewed-by: tonyp, johnc
author brutisso
date Wed, 21 Dec 2011 22:13:31 +0100
parents a88de71c4e3a
children 1d6185f732aa
rev   line source
ysr@342 1 /*
tonyp@2034 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
ysr@342 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@342 4 *
ysr@342 5 * This code is free software; you can redistribute it and/or modify it
ysr@342 6 * under the terms of the GNU General Public License version 2 only, as
ysr@342 7 * published by the Free Software Foundation.
ysr@342 8 *
ysr@342 9 * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@342 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@342 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ysr@342 12 * version 2 for more details (a copy is included in the LICENSE file that
ysr@342 13 * accompanied this code).
ysr@342 14 *
ysr@342 15 * You should have received a copy of the GNU General Public License version
ysr@342 16 * 2 along with this work; if not, write to the Free Software Foundation,
ysr@342 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@342 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
ysr@342 22 *
ysr@342 23 */
ysr@342 24
stefank@1879 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
stefank@1879 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
stefank@1879 27
stefank@1879 28 #include "runtime/globals.hpp"
stefank@1879 29
ysr@342 30 //
ysr@342 31 // Defines all globals flags used by the garbage-first compiler.
ysr@342 32 //
ysr@342 33
ysr@350 34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
ysr@342 35 \
johnc@751 36 product(intx, G1ConfidencePercent, 50, \
ysr@342 37 "Confidence level for MMU/pause predictions") \
ysr@342 38 \
tonyp@884 39 develop(intx, G1MarkingOverheadPercent, 0, \
ysr@342 40 "Overhead of concurrent marking") \
ysr@342 41 \
ysr@342 42 develop(intx, G1MarkingVerboseLevel, 0, \
ysr@342 43 "Level (0-4) of verboseness of the marking code") \
ysr@342 44 \
tonyp@1044 45 develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1044 46 "Reachable object dump at the initial mark pause") \
tonyp@1044 47 \
tonyp@1044 48 develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1044 49 "If conc mark verification fails, dump reachable objects") \
tonyp@1044 50 \
tonyp@1044 51 develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1044 52 "The base file name for the reachable object dumps") \
ysr@342 53 \
ysr@342 54 develop(bool, G1TraceMarkStackOverflow, false, \
ysr@342 55 "If true, extra debugging code for CM restart for ovflw.") \
ysr@342 56 \
tonyp@1282 57 diagnostic(bool, G1SummarizeConcMark, false, \
ysr@342 58 "Summarize concurrent mark info") \
ysr@342 59 \
johnc@751 60 diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@342 61 "Summarize remembered set processing info") \
ysr@342 62 \
tonyp@884 63 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@884 64 "The period (in number of GCs) at which we will generate " \
tonyp@884 65 "update buffer processing info " \
tonyp@884 66 "(0 means do not periodically generate this info); " \
tonyp@884 67 "it also requires -XX:+G1SummarizeRSetStats") \
tonyp@884 68 \
tonyp@1282 69 diagnostic(bool, G1TraceConcRefinement, false, \
ysr@342 70 "Trace G1 concurrent refinement") \
ysr@342 71 \
johnc@751 72 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@342 73 "Size of the region stack for concurrent marking.") \
ysr@342 74 \
johnc@2059 75 product(double, G1ConcMarkStepDurationMillis, 10.0, \
johnc@2059 76 "Target duration of individual concurrent marking steps " \
johnc@2059 77 "in milliseconds.") \
johnc@2059 78 \
johnc@2059 79 product(intx, G1RefProcDrainInterval, 10, \
johnc@2059 80 "The number of discovered reference objects to process before " \
johnc@2059 81 "draining concurrent marking work queues.") \
johnc@2059 82 \
johnc@2346 83 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
johnc@2283 84 "If true, enable reference discovery during concurrent " \
johnc@2346 85 "marking and reference processing at the end of remark.") \
ysr@342 86 \
tonyp@1282 87 product(intx, G1SATBBufferSize, 1*K, \
ysr@342 88 "Number of entries in an SATB log buffer.") \
ysr@342 89 \
tonyp@1282 90 develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@342 91 "Number of completed buffers that triggers log processing.") \
ysr@342 92 \
tonyp@2034 93 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
tonyp@2034 94 "Before enqueueing them, each mutator thread tries to do some " \
tonyp@2034 95 "filtering on the SATB buffers it generates. If post-filtering " \
tonyp@2034 96 "the percentage of retained entries is over this threshold " \
tonyp@2034 97 "the buffer will be enqueued for processing. A value of 0 " \
tonyp@2034 98 "specifies that mutator threads should not do such filtering.") \
tonyp@2034 99 \
ysr@342 100 develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@342 101 "If the young survival rate is S, and there's room left in " \
ysr@342 102 "to-space, we will allow regions whose survival rate is up to " \
ysr@342 103 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@342 104 \
ysr@342 105 develop(intx, G1InitYoungSurvRatio, 50, \
ysr@342 106 "Expected Survival Rate for newly allocated bytes") \
ysr@342 107 \
ysr@342 108 develop(bool, G1SATBPrintStubs, false, \
ysr@342 109 "If true, print generated stubs for the SATB barrier") \
ysr@342 110 \
tonyp@1282 111 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@342 112 "When expanding, % of uncommitted space to claim.") \
ysr@342 113 \
ysr@342 114 develop(bool, G1RSBarrierRegionFilter, true, \
ysr@342 115 "If true, generate region filtering code in RS barrier") \
ysr@342 116 \
ysr@342 117 develop(bool, G1RSBarrierNullFilter, true, \
ysr@342 118 "If true, generate null-pointer filtering code in RS barrier") \
ysr@342 119 \
iveresov@616 120 develop(bool, G1DeferredRSUpdate, true, \
iveresov@616 121 "If true, use deferred RS updates") \
iveresov@616 122 \
ysr@342 123 develop(bool, G1RSLogCheckCardTable, false, \
ysr@342 124 "If true, verify that no dirty cards remain after RS log " \
ysr@342 125 "processing.") \
ysr@342 126 \
ysr@342 127 develop(bool, G1RSCountHisto, false, \
ysr@342 128 "If true, print a histogram of RS occupancies after each pause") \
ysr@342 129 \
tonyp@2686 130 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
tonyp@2686 131 "Prints the liveness information for all regions in the heap " \
tonyp@2686 132 "at the end of a marking cycle.") \
ysr@342 133 \
ysr@342 134 develop(bool, G1PrintParCleanupStats, false, \
ysr@342 135 "When true, print extra stats about parallel cleanup.") \
ysr@342 136 \
tonyp@883 137 product(intx, G1UpdateBufferSize, 256, \
tonyp@883 138 "Size of an update buffer") \
tonyp@883 139 \
tonyp@1282 140 product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@883 141 "Number of enqueued update buffers that will " \
iveresov@1111 142 "trigger concurrent processing. Will be selected ergonomically " \
iveresov@1111 143 "by default.") \
tonyp@883 144 \
tonyp@1282 145 product(intx, G1ConcRefinementRedZone, 0, \
tonyp@883 146 "Maximum number of enqueued update buffers before mutator " \
iveresov@1111 147 "threads start processing new ones instead of enqueueing them. " \
iveresov@1111 148 "Will be selected ergonomically by default. Zero will disable " \
iveresov@1111 149 "concurrent processing.") \
iveresov@1111 150 \
tonyp@1282 151 product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1111 152 "The number of update buffers that are left in the queue by the " \
iveresov@1111 153 "concurrent processing threads. Will be selected ergonomically " \
iveresov@1111 154 "by default.") \
iveresov@1111 155 \
tonyp@1282 156 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1111 157 "The last concurrent refinement thread wakes up every " \
iveresov@1111 158 "specified number of milliseconds to do miscellaneous work.") \
iveresov@1111 159 \
tonyp@1282 160 product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1111 161 "Each time the rset update queue increases by this amount " \
iveresov@1111 162 "activate the next refinement thread if available. " \
iveresov@1111 163 "Will be selected ergonomically by default.") \
iveresov@1111 164 \
tonyp@1282 165 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1111 166 "A target percentage of time that is allowed to be spend on " \
iveresov@1111 167 "process RS update buffers during the collection pause.") \
iveresov@1111 168 \
tonyp@1282 169 product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1111 170 "Select green, yellow and red zones adaptively to meet the " \
iveresov@1111 171 "the pause requirements.") \
ysr@342 172 \
ysr@342 173 develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@342 174 "Log base 2 of the length of conc RS hot-card cache.") \
ysr@342 175 \
johnc@751 176 develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@342 177 "The threshold that defines (>=) a hot card.") \
ysr@342 178 \
johnc@2278 179 develop(intx, G1MaxHotCardCountSizePercent, 25, \
johnc@2278 180 "The maximum size of the hot card count cache as a " \
johnc@2278 181 "percentage of the number of cards for the maximum heap.") \
johnc@2278 182 \
ysr@342 183 develop(bool, G1PrintOopAppls, false, \
ysr@342 184 "When true, print applications of closures to external locs.") \
ysr@342 185 \
iveresov@1261 186 develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1261 187 "Max number of regions in a fine-grain table per MB.") \
iveresov@1261 188 \
iveresov@1261 189 product(intx, G1RSetRegionEntries, 0, \
iveresov@1261 190 "Max number of regions for which we keep bitmaps." \
iveresov@1261 191 "Will be set ergonomically by default") \
iveresov@1261 192 \
iveresov@1261 193 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1261 194 "Max number of entries per region in a sparse table " \
iveresov@1261 195 "per MB.") \
iveresov@1261 196 \
iveresov@1261 197 product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1261 198 "Max number of entries per region in a sparse table." \
iveresov@1261 199 "Will be set ergonomically by default.") \
ysr@342 200 \
ysr@342 201 develop(bool, G1RecordHRRSOops, false, \
ysr@342 202 "When true, record recent calls to rem set operations.") \
ysr@342 203 \
ysr@342 204 develop(bool, G1RecordHRRSEvents, false, \
ysr@342 205 "When true, record recent calls to rem set operations.") \
ysr@342 206 \
ysr@342 207 develop(intx, G1MaxVerifyFailures, -1, \
ysr@342 208 "The maximum number of verification failrues to print. " \
ysr@342 209 "-1 means print all.") \
ysr@342 210 \
ysr@342 211 develop(bool, G1ScrubRemSets, true, \
ysr@342 212 "When true, do RS scrubbing after cleanup.") \
ysr@342 213 \
ysr@342 214 develop(bool, G1RSScrubVerbose, false, \
ysr@342 215 "When true, do RS scrubbing with verbose output.") \
ysr@342 216 \
ysr@342 217 develop(bool, G1YoungSurvRateVerbose, false, \
ysr@342 218 "print out the survival rate of young regions according to age.") \
ysr@342 219 \
ysr@342 220 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@342 221 "the number of regions for which we'll print a surv rate " \
ysr@342 222 "summary.") \
ysr@342 223 \
tonyp@2684 224 product(uintx, G1ReservePercent, 10, \
ysr@342 225 "It determines the minimum reserve we should have in the heap " \
ysr@342 226 "to minimize the probability of promotion failure.") \
ysr@342 227 \
tonyp@1282 228 diagnostic(bool, G1PrintHeapRegions, false, \
ysr@342 229 "If set G1 will print information on which regions are being " \
ysr@342 230 "allocated and which are reclaimed.") \
ysr@342 231 \
ysr@342 232 develop(bool, G1HRRSUseSparseTable, true, \
ysr@342 233 "When true, use sparse table to save space.") \
ysr@342 234 \
ysr@342 235 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@342 236 "Forces flushing of log buffers before verification.") \
ysr@342 237 \
ysr@1087 238 develop(bool, G1FailOnFPError, false, \
ysr@1087 239 "When set, G1 will fail when it encounters an FP 'error', " \
ysr@1087 240 "so as to allow debugging") \
ysr@1087 241 \
tonyp@942 242 product(uintx, G1HeapRegionSize, 0, \
tonyp@942 243 "Size of the G1 regions.") \
tonyp@942 244 \
tonyp@1357 245 experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@638 246 "Enables the parallelization of remembered set updating " \
tonyp@638 247 "during evacuation pauses") \
tonyp@638 248 \
tonyp@1357 249 experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@638 250 "Enables the parallelization of remembered set scanning " \
iveresov@794 251 "during evacuation pauses") \
iveresov@794 252 \
tonyp@1282 253 product(uintx, G1ConcRefinementThreads, 0, \
iveresov@794 254 "If non-0 is the number of parallel rem set update threads, " \
johnc@890 255 "otherwise the value is determined ergonomically.") \
johnc@890 256 \
johnc@890 257 develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@890 258 "Expand the card count cache if the number of collisions for " \
apetrusenko@940 259 "a particular entry exceeds this value.") \
apetrusenko@940 260 \
apetrusenko@940 261 develop(bool, G1VerifyCTCleanup, false, \
ysr@1194 262 "Verify card table cleanup.") \
ysr@1194 263 \
iveresov@1261 264 product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1261 265 "Size of a work unit of cards claimed by a worker thread" \
iveresov@1261 266 "during RSet scanning.") \
iveresov@1261 267 \
tonyp@2037 268 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
tonyp@2037 269 "The number of regions we will add to the secondary free list " \
tonyp@2037 270 "at every append operation") \
tonyp@2037 271 \
tonyp@2037 272 develop(bool, G1ConcRegionFreeingVerbose, false, \
tonyp@2037 273 "Enables verboseness during concurrent region freeing") \
tonyp@2037 274 \
tonyp@2037 275 develop(bool, G1StressConcRegionFreeing, false, \
tonyp@2037 276 "It stresses the concurrent region freeing operation") \
tonyp@2037 277 \
tonyp@2037 278 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
tonyp@2037 279 "Artificial delay during concurrent region freeing") \
tonyp@2037 280 \
tonyp@2382 281 develop(uintx, G1DummyRegionsPerGC, 0, \
tonyp@2382 282 "The number of dummy regions G1 will allocate at the end of " \
tonyp@2382 283 "each evacuation pause in order to artificially fill up the " \
tonyp@2382 284 "heap and stress the marking implementation.") \
tonyp@2382 285 \
johnc@2069 286 develop(bool, G1ExitOnExpansionFailure, false, \
johnc@2069 287 "Raise a fatal VM exit out of memory failure in the event " \
tonyp@2413 288 " that heap expansion fails due to running out of swap.") \
tonyp@2413 289 \
tonyp@2413 290 develop(uintx, G1ConcMarkForceOverflow, 0, \
tonyp@2413 291 "The number of times we'll force an overflow during " \
brutisso@2923 292 "concurrent marking") \
brutisso@2923 293 \
brutisso@2923 294 develop(uintx, G1DefaultMinNewGenPercent, 20, \
brutisso@2923 295 "Percentage (0-100) of the heap size to use as minimum " \
brutisso@2923 296 "young gen size.") \
brutisso@2923 297 \
brutisso@2923 298 develop(uintx, G1DefaultMaxNewGenPercent, 50, \
brutisso@2923 299 "Percentage (0-100) of the heap size to use as maximum " \
brutisso@2923 300 "young gen size.")
ysr@342 301
ysr@350 302 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)
stefank@1879 303
stefank@1879 304 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP