g1_globals.hpp revision 9587:b389867c9d1d
1/* 2 * Copyright (c) 2001, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_GC_G1_G1_GLOBALS_HPP 26#define SHARE_VM_GC_G1_G1_GLOBALS_HPP 27 28#include "runtime/globals.hpp" 29#include <float.h> // for DBL_MAX 30// 31// Defines all globals flags used by the garbage-first compiler. 32// 33 34#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, range, constraint) \ 35 \ 36 product(bool, G1UseAdaptiveIHOP, false, \ 37 "Adaptively adjust InitiatingHeapOccupancyPercent from the " \ 38 "initial value.") \ 39 \ 40 experimental(size_t, G1AdaptiveIHOPNumInitialSamples, 3, \ 41 "How many completed time periods from initial mark to first " \ 42 "mixed gc are required to use the input values for prediction " \ 43 "of the optimal occupancy to start marking.") \ 44 range(1, max_intx) \ 45 \ 46 product(uintx, G1ConfidencePercent, 50, \ 47 "Confidence level for MMU/pause predictions") \ 48 range(0, 100) \ 49 \ 50 develop(intx, G1MarkingOverheadPercent, 0, \ 51 "Overhead of concurrent marking") \ 52 range(0, 100) \ 53 \ 54 develop(intx, G1MarkingVerboseLevel, 0, \ 55 "Level (0-4) of verboseness of the marking code") \ 56 range(0, 4) \ 57 \ 58 develop(bool, G1TraceMarkStackOverflow, false, \ 59 "If true, extra debugging code for CM restart for ovflw.") \ 60 \ 61 diagnostic(bool, G1SummarizeConcMark, false, \ 62 "Summarize concurrent mark info") \ 63 \ 64 diagnostic(bool, G1SummarizeRSetStats, false, \ 65 "Summarize remembered set processing info") \ 66 \ 67 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ 68 "The period (in number of GCs) at which we will generate " \ 69 "update buffer processing info " \ 70 "(0 means do not periodically generate this info); " \ 71 "it also requires -XX:+G1SummarizeRSetStats") \ 72 range(0, max_intx) \ 73 \ 74 diagnostic(bool, G1TraceConcRefinement, false, \ 75 "Trace G1 concurrent refinement") \ 76 \ 77 experimental(bool, G1TraceStringSymbolTableScrubbing, false, \ 78 "Trace information string and symbol table scrubbing.") \ 79 \ 80 product(double, G1ConcMarkStepDurationMillis, 10.0, \ 81 "Target duration of individual concurrent marking steps " \ 82 "in milliseconds.") \ 83 range(1.0, DBL_MAX) \ 84 \ 85 product(intx, G1RefProcDrainInterval, 10, \ 86 "The number of discovered reference objects to process before " \ 87 "draining concurrent marking work queues.") \ 88 range(1, max_intx) \ 89 \ 90 experimental(bool, G1UseConcMarkReferenceProcessing, true, \ 91 "If true, enable reference discovery during concurrent " \ 92 "marking and reference processing at the end of remark.") \ 93 \ 94 experimental(double, G1LastPLABAverageOccupancy, 50.0, \ 95 "The expected average occupancy of the last PLAB in " \ 96 "percent.") \ 97 range(0.001, 100.0) \ 98 \ 99 product(size_t, G1SATBBufferSize, 1*K, \ 100 "Number of entries in an SATB log buffer.") \ 101 range(1, max_uintx) \ 102 \ 103 develop(intx, G1SATBProcessCompletedThreshold, 20, \ 104 "Number of completed buffers that triggers log processing.") \ 105 range(0, max_jint) \ 106 \ 107 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ 108 "Before enqueueing them, each mutator thread tries to do some " \ 109 "filtering on the SATB buffers it generates. If post-filtering " \ 110 "the percentage of retained entries is over this threshold " \ 111 "the buffer will be enqueued for processing. A value of 0 " \ 112 "specifies that mutator threads should not do such filtering.") \ 113 range(0, 100) \ 114 \ 115 experimental(intx, G1ExpandByPercentOfAvailable, 20, \ 116 "When expanding, % of uncommitted space to claim.") \ 117 range(0, 100) \ 118 \ 119 develop(bool, G1RSBarrierRegionFilter, true, \ 120 "If true, generate region filtering code in RS barrier") \ 121 \ 122 diagnostic(bool, G1PrintRegionLivenessInfo, false, \ 123 "Prints the liveness information for all regions in the heap " \ 124 "at the end of a marking cycle.") \ 125 \ 126 product(size_t, G1UpdateBufferSize, 256, \ 127 "Size of an update buffer") \ 128 range(1, NOT_LP64(32*M) LP64_ONLY(1*G)) \ 129 \ 130 product(intx, G1ConcRefinementYellowZone, 0, \ 131 "Number of enqueued update buffers that will " \ 132 "trigger concurrent processing. Will be selected ergonomically " \ 133 "by default.") \ 134 range(0, max_intx) \ 135 \ 136 product(intx, G1ConcRefinementRedZone, 0, \ 137 "Maximum number of enqueued update buffers before mutator " \ 138 "threads start processing new ones instead of enqueueing them. " \ 139 "Will be selected ergonomically by default. Zero will disable " \ 140 "concurrent processing.") \ 141 range(0, max_intx) \ 142 \ 143 product(intx, G1ConcRefinementGreenZone, 0, \ 144 "The number of update buffers that are left in the queue by the " \ 145 "concurrent processing threads. Will be selected ergonomically " \ 146 "by default.") \ 147 range(0, max_intx) \ 148 \ 149 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ 150 "The last concurrent refinement thread wakes up every " \ 151 "specified number of milliseconds to do miscellaneous work.") \ 152 range(0, max_jint) \ 153 \ 154 product(intx, G1ConcRefinementThresholdStep, 0, \ 155 "Each time the rset update queue increases by this amount " \ 156 "activate the next refinement thread if available. " \ 157 "Will be selected ergonomically by default.") \ 158 \ 159 product(intx, G1RSetUpdatingPauseTimePercent, 10, \ 160 "A target percentage of time that is allowed to be spend on " \ 161 "process RS update buffers during the collection pause.") \ 162 range(0, 100) \ 163 \ 164 product(bool, G1UseAdaptiveConcRefinement, true, \ 165 "Select green, yellow and red zones adaptively to meet the " \ 166 "the pause requirements.") \ 167 \ 168 product(size_t, G1ConcRSLogCacheSize, 10, \ 169 "Log base 2 of the length of conc RS hot-card cache.") \ 170 range(0, 27) \ 171 \ 172 product(uintx, G1ConcRSHotCardLimit, 4, \ 173 "The threshold that defines (>=) a hot card.") \ 174 range(0, max_jubyte) \ 175 \ 176 develop(intx, G1RSetRegionEntriesBase, 256, \ 177 "Max number of regions in a fine-grain table per MB.") \ 178 range(1, max_jint/wordSize) \ 179 \ 180 product(intx, G1RSetRegionEntries, 0, \ 181 "Max number of regions for which we keep bitmaps." \ 182 "Will be set ergonomically by default") \ 183 range(0, max_jint/wordSize) \ 184 constraint(G1RSetRegionEntriesConstraintFunc,AfterErgo) \ 185 \ 186 develop(intx, G1RSetSparseRegionEntriesBase, 4, \ 187 "Max number of entries per region in a sparse table " \ 188 "per MB.") \ 189 range(1, max_jint/wordSize) \ 190 \ 191 product(intx, G1RSetSparseRegionEntries, 0, \ 192 "Max number of entries per region in a sparse table." \ 193 "Will be set ergonomically by default.") \ 194 range(0, max_jint/wordSize) \ 195 constraint(G1RSetSparseRegionEntriesConstraintFunc,AfterErgo) \ 196 \ 197 develop(intx, G1MaxVerifyFailures, -1, \ 198 "The maximum number of verification failures to print. " \ 199 "-1 means print all.") \ 200 range(-1, max_jint) \ 201 \ 202 develop(bool, G1ScrubRemSets, true, \ 203 "When true, do RS scrubbing after cleanup.") \ 204 \ 205 develop(bool, G1RSScrubVerbose, false, \ 206 "When true, do RS scrubbing with verbose output.") \ 207 \ 208 develop(bool, G1YoungSurvRateVerbose, false, \ 209 "print out the survival rate of young regions according to age.") \ 210 \ 211 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ 212 "the number of regions for which we'll print a surv rate " \ 213 "summary.") \ 214 range(0, max_intx) \ 215 constraint(G1YoungSurvRateNumRegionsSummaryConstraintFunc,AfterErgo)\ 216 \ 217 product(uintx, G1ReservePercent, 10, \ 218 "It determines the minimum reserve we should have in the heap " \ 219 "to minimize the probability of promotion failure.") \ 220 range(0, 50) \ 221 \ 222 diagnostic(bool, G1PrintHeapRegions, false, \ 223 "If set G1 will print information on which regions are being " \ 224 "allocated and which are reclaimed.") \ 225 \ 226 develop(bool, G1HRRSUseSparseTable, true, \ 227 "When true, use sparse table to save space.") \ 228 \ 229 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ 230 "Forces flushing of log buffers before verification.") \ 231 \ 232 product(size_t, G1HeapRegionSize, 0, \ 233 "Size of the G1 regions.") \ 234 range(0, 32*M) \ 235 constraint(G1HeapRegionSizeConstraintFunc,AfterMemoryInit) \ 236 \ 237 product(uintx, G1ConcRefinementThreads, 0, \ 238 "If non-0 is the number of parallel rem set update threads, " \ 239 "otherwise the value is determined ergonomically.") \ 240 range(0, (max_jint-1)/wordSize) \ 241 \ 242 develop(bool, G1VerifyCTCleanup, false, \ 243 "Verify card table cleanup.") \ 244 \ 245 product(size_t, G1RSetScanBlockSize, 64, \ 246 "Size of a work unit of cards claimed by a worker thread" \ 247 "during RSet scanning.") \ 248 range(1, max_uintx) \ 249 \ 250 develop(uintx, G1SecondaryFreeListAppendLength, 5, \ 251 "The number of regions we will add to the secondary free list " \ 252 "at every append operation") \ 253 \ 254 develop(bool, G1ConcRegionFreeingVerbose, false, \ 255 "Enables verboseness during concurrent region freeing") \ 256 \ 257 develop(bool, G1StressConcRegionFreeing, false, \ 258 "It stresses the concurrent region freeing operation") \ 259 \ 260 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ 261 "Artificial delay during concurrent region freeing") \ 262 \ 263 develop(uintx, G1DummyRegionsPerGC, 0, \ 264 "The number of dummy regions G1 will allocate at the end of " \ 265 "each evacuation pause in order to artificially fill up the " \ 266 "heap and stress the marking implementation.") \ 267 \ 268 develop(bool, G1ExitOnExpansionFailure, false, \ 269 "Raise a fatal VM exit out of memory failure in the event " \ 270 " that heap expansion fails due to running out of swap.") \ 271 \ 272 develop(uintx, G1ConcMarkForceOverflow, 0, \ 273 "The number of times we'll force an overflow during " \ 274 "concurrent marking") \ 275 \ 276 experimental(uintx, G1MaxNewSizePercent, 60, \ 277 "Percentage (0-100) of the heap size to use as default " \ 278 " maximum young gen size.") \ 279 range(0, 100) \ 280 constraint(G1MaxNewSizePercentConstraintFunc,AfterErgo) \ 281 \ 282 experimental(uintx, G1NewSizePercent, 5, \ 283 "Percentage (0-100) of the heap size to use as default " \ 284 "minimum young gen size.") \ 285 range(0, 100) \ 286 constraint(G1NewSizePercentConstraintFunc,AfterErgo) \ 287 \ 288 experimental(uintx, G1MixedGCLiveThresholdPercent, 85, \ 289 "Threshold for regions to be considered for inclusion in the " \ 290 "collection set of mixed GCs. " \ 291 "Regions with live bytes exceeding this will not be collected.") \ 292 range(0, 100) \ 293 \ 294 product(uintx, G1HeapWastePercent, 5, \ 295 "Amount of space, expressed as a percentage of the heap size, " \ 296 "that G1 is willing not to collect to avoid expensive GCs.") \ 297 range(0, 100) \ 298 \ 299 product(uintx, G1MixedGCCountTarget, 8, \ 300 "The target number of mixed GCs after a marking cycle.") \ 301 \ 302 experimental(bool, G1EagerReclaimHumongousObjects, true, \ 303 "Try to reclaim dead large objects at every young GC.") \ 304 \ 305 experimental(bool, G1EagerReclaimHumongousObjectsWithStaleRefs, true, \ 306 "Try to reclaim dead large objects that have a few stale " \ 307 "references at every young GC.") \ 308 \ 309 experimental(bool, G1TraceEagerReclaimHumongousObjects, false, \ 310 "Print some information about large object liveness " \ 311 "at every young GC.") \ 312 \ 313 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \ 314 "An upper bound for the number of old CSet regions expressed " \ 315 "as a percentage of the heap size.") \ 316 range(0, 100) \ 317 \ 318 experimental(ccstr, G1LogLevel, NULL, \ 319 "Log level for G1 logging: fine, finer, finest") \ 320 \ 321 notproduct(bool, G1EvacuationFailureALot, false, \ 322 "Force use of evacuation failure handling during certain " \ 323 "evacuation pauses") \ 324 \ 325 develop(uintx, G1EvacuationFailureALotCount, 1000, \ 326 "Number of successful evacuations between evacuation failures " \ 327 "occurring at object copying") \ 328 \ 329 develop(uintx, G1EvacuationFailureALotInterval, 5, \ 330 "Total collections between forced triggering of evacuation " \ 331 "failures") \ 332 \ 333 develop(bool, G1EvacuationFailureALotDuringConcMark, true, \ 334 "Force use of evacuation failure handling during evacuation " \ 335 "pauses when marking is in progress") \ 336 \ 337 develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \ 338 "Force use of evacuation failure handling during initial mark " \ 339 "evacuation pauses") \ 340 \ 341 develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \ 342 "Force use of evacuation failure handling during young " \ 343 "evacuation pauses") \ 344 \ 345 develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \ 346 "Force use of evacuation failure handling during mixed " \ 347 "evacuation pauses") \ 348 \ 349 diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \ 350 "If true, perform verification of each heap region's " \ 351 "remembered set when verifying the heap during a full GC.") \ 352 \ 353 diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \ 354 "Verify the code root lists attached to each heap region.") \ 355 \ 356 develop(bool, G1VerifyBitmaps, false, \ 357 "Verifies the consistency of the marking bitmaps") 358 359G1_FLAGS(DECLARE_DEVELOPER_FLAG, \ 360 DECLARE_PD_DEVELOPER_FLAG, \ 361 DECLARE_PRODUCT_FLAG, \ 362 DECLARE_PD_PRODUCT_FLAG, \ 363 DECLARE_DIAGNOSTIC_FLAG, \ 364 DECLARE_EXPERIMENTAL_FLAG, \ 365 DECLARE_NOTPRODUCT_FLAG, \ 366 DECLARE_MANAGEABLE_FLAG, \ 367 DECLARE_PRODUCT_RW_FLAG, \ 368 IGNORE_RANGE, \ 369 IGNORE_CONSTRAINT) 370 371#endif // SHARE_VM_GC_G1_G1_GLOBALS_HPP 372