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annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 2362:a2c2eac1ca62
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author | jcoomes |
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date | Sun, 06 Mar 2011 11:37:18 -0800 |
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342 | 1 /* |
2149 | 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP | |
27 | |
28 #include "runtime/globals.hpp" | |
29 | |
342 | 30 // |
31 // Defines all globals flags used by the garbage-first compiler. | |
32 // | |
33 | |
350
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34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \ |
342 | 35 \ |
751 | 36 product(intx, G1ConfidencePercent, 50, \ |
342 | 37 "Confidence level for MMU/pause predictions") \ |
38 \ | |
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39 develop(intx, G1MarkingOverheadPercent, 0, \ |
342 | 40 "Overhead of concurrent marking") \ |
41 \ | |
751 | 42 develop(bool, G1Gen, true, \ |
342 | 43 "If true, it will enable the generational G1") \ |
44 \ | |
751 | 45 develop(intx, G1PolicyVerbose, 0, \ |
342 | 46 "The verbosity level on G1 policy decisions") \ |
47 \ | |
48 develop(intx, G1MarkingVerboseLevel, 0, \ | |
49 "Level (0-4) of verboseness of the marking code") \ | |
50 \ | |
1044 | 51 develop(bool, G1PrintReachableAtInitialMark, false, \ |
52 "Reachable object dump at the initial mark pause") \ | |
53 \ | |
54 develop(bool, G1VerifyDuringGCPrintReachable, false, \ | |
55 "If conc mark verification fails, dump reachable objects") \ | |
56 \ | |
57 develop(ccstr, G1PrintReachableBaseFile, NULL, \ | |
58 "The base file name for the reachable object dumps") \ | |
342 | 59 \ |
60 develop(bool, G1TraceMarkStackOverflow, false, \ | |
61 "If true, extra debugging code for CM restart for ovflw.") \ | |
62 \ | |
63 develop(intx, G1PausesBtwnConcMark, -1, \ | |
64 "If positive, fixed number of pauses between conc markings") \ | |
65 \ | |
1282 | 66 diagnostic(bool, G1SummarizeConcMark, false, \ |
342 | 67 "Summarize concurrent mark info") \ |
68 \ | |
751 | 69 diagnostic(bool, G1SummarizeRSetStats, false, \ |
342 | 70 "Summarize remembered set processing info") \ |
71 \ | |
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72 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ |
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73 "The period (in number of GCs) at which we will generate " \ |
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74 "update buffer processing info " \ |
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75 "(0 means do not periodically generate this info); " \ |
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76 "it also requires -XX:+G1SummarizeRSetStats") \ |
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77 \ |
1282 | 78 diagnostic(bool, G1TraceConcRefinement, false, \ |
342 | 79 "Trace G1 concurrent refinement") \ |
80 \ | |
751 | 81 product(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
342 | 82 "Size of the region stack for concurrent marking.") \ |
83 \ | |
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84 product(double, G1ConcMarkStepDurationMillis, 10.0, \ |
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85 "Target duration of individual concurrent marking steps " \ |
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86 "in milliseconds.") \ |
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87 \ |
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88 product(intx, G1RefProcDrainInterval, 10, \ |
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89 "The number of discovered reference objects to process before " \ |
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90 "draining concurrent marking work queues.") \ |
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91 \ |
342 | 92 develop(bool, G1SATBBarrierPrintNullPreVals, false, \ |
93 "If true, count frac of ptr writes with null pre-vals.") \ | |
94 \ | |
1282 | 95 product(intx, G1SATBBufferSize, 1*K, \ |
342 | 96 "Number of entries in an SATB log buffer.") \ |
97 \ | |
1282 | 98 develop(intx, G1SATBProcessCompletedThreshold, 20, \ |
342 | 99 "Number of completed buffers that triggers log processing.") \ |
100 \ | |
2149 | 101 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ |
102 "Before enqueueing them, each mutator thread tries to do some " \ | |
103 "filtering on the SATB buffers it generates. If post-filtering " \ | |
104 "the percentage of retained entries is over this threshold " \ | |
105 "the buffer will be enqueued for processing. A value of 0 " \ | |
106 "specifies that mutator threads should not do such filtering.") \ | |
107 \ | |
342 | 108 develop(intx, G1ExtraRegionSurvRate, 33, \ |
109 "If the young survival rate is S, and there's room left in " \ | |
110 "to-space, we will allow regions whose survival rate is up to " \ | |
111 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
112 \ | |
113 develop(intx, G1InitYoungSurvRatio, 50, \ | |
114 "Expected Survival Rate for newly allocated bytes") \ | |
115 \ | |
116 develop(bool, G1SATBPrintStubs, false, \ | |
117 "If true, print generated stubs for the SATB barrier") \ | |
118 \ | |
1282 | 119 experimental(intx, G1ExpandByPercentOfAvailable, 20, \ |
342 | 120 "When expanding, % of uncommitted space to claim.") \ |
121 \ | |
122 develop(bool, G1RSBarrierRegionFilter, true, \ | |
123 "If true, generate region filtering code in RS barrier") \ | |
124 \ | |
125 develop(bool, G1RSBarrierNullFilter, true, \ | |
126 "If true, generate null-pointer filtering code in RS barrier") \ | |
127 \ | |
128 develop(bool, G1PrintCTFilterStats, false, \ | |
129 "If true, print stats on RS filtering effectiveness") \ | |
130 \ | |
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131 develop(bool, G1DeferredRSUpdate, true, \ |
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132 "If true, use deferred RS updates") \ |
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133 \ |
342 | 134 develop(bool, G1RSLogCheckCardTable, false, \ |
135 "If true, verify that no dirty cards remain after RS log " \ | |
136 "processing.") \ | |
137 \ | |
138 develop(bool, G1RSCountHisto, false, \ | |
139 "If true, print a histogram of RS occupancies after each pause") \ | |
140 \ | |
141 develop(intx, G1PrintRegionLivenessInfo, 0, \ | |
142 "When > 0, print the occupancies of the <n> best and worst" \ | |
143 "regions.") \ | |
144 \ | |
145 develop(bool, G1PrintParCleanupStats, false, \ | |
146 "When true, print extra stats about parallel cleanup.") \ | |
147 \ | |
148 develop(bool, G1DisablePreBarrier, false, \ | |
149 "Disable generation of pre-barrier (i.e., marking barrier) ") \ | |
150 \ | |
151 develop(bool, G1DisablePostBarrier, false, \ | |
152 "Disable generation of post-barrier (i.e., RS barrier) ") \ | |
153 \ | |
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154 product(intx, G1UpdateBufferSize, 256, \ |
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155 "Size of an update buffer") \ |
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156 \ |
1282 | 157 product(intx, G1ConcRefinementYellowZone, 0, \ |
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158 "Number of enqueued update buffers that will " \ |
1111 | 159 "trigger concurrent processing. Will be selected ergonomically " \ |
160 "by default.") \ | |
161 \ | |
1282 | 162 product(intx, G1ConcRefinementRedZone, 0, \ |
1111 | 163 "Maximum number of enqueued update buffers before mutator " \ |
164 "threads start processing new ones instead of enqueueing them. " \ | |
165 "Will be selected ergonomically by default. Zero will disable " \ | |
166 "concurrent processing.") \ | |
167 \ | |
1282 | 168 product(intx, G1ConcRefinementGreenZone, 0, \ |
1111 | 169 "The number of update buffers that are left in the queue by the " \ |
170 "concurrent processing threads. Will be selected ergonomically " \ | |
171 "by default.") \ | |
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172 \ |
1282 | 173 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ |
1111 | 174 "The last concurrent refinement thread wakes up every " \ |
175 "specified number of milliseconds to do miscellaneous work.") \ | |
176 \ | |
1282 | 177 product(intx, G1ConcRefinementThresholdStep, 0, \ |
1111 | 178 "Each time the rset update queue increases by this amount " \ |
179 "activate the next refinement thread if available. " \ | |
180 "Will be selected ergonomically by default.") \ | |
181 \ | |
1282 | 182 product(intx, G1RSetUpdatingPauseTimePercent, 10, \ |
1111 | 183 "A target percentage of time that is allowed to be spend on " \ |
184 "process RS update buffers during the collection pause.") \ | |
185 \ | |
1282 | 186 product(bool, G1UseAdaptiveConcRefinement, true, \ |
1111 | 187 "Select green, yellow and red zones adaptively to meet the " \ |
188 "the pause requirements.") \ | |
342 | 189 \ |
190 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
191 "Log base 2 of the length of conc RS hot-card cache.") \ | |
192 \ | |
751 | 193 develop(intx, G1ConcRSHotCardLimit, 4, \ |
342 | 194 "The threshold that defines (>=) a hot card.") \ |
195 \ | |
196 develop(bool, G1PrintOopAppls, false, \ | |
197 "When true, print applications of closures to external locs.") \ | |
198 \ | |
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199 develop(intx, G1RSetRegionEntriesBase, 256, \ |
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200 "Max number of regions in a fine-grain table per MB.") \ |
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201 \ |
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202 product(intx, G1RSetRegionEntries, 0, \ |
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203 "Max number of regions for which we keep bitmaps." \ |
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204 "Will be set ergonomically by default") \ |
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205 \ |
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206 develop(intx, G1RSetSparseRegionEntriesBase, 4, \ |
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207 "Max number of entries per region in a sparse table " \ |
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208 "per MB.") \ |
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209 \ |
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210 product(intx, G1RSetSparseRegionEntries, 0, \ |
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211 "Max number of entries per region in a sparse table." \ |
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212 "Will be set ergonomically by default.") \ |
342 | 213 \ |
214 develop(bool, G1RecordHRRSOops, false, \ | |
215 "When true, record recent calls to rem set operations.") \ | |
216 \ | |
217 develop(bool, G1RecordHRRSEvents, false, \ | |
218 "When true, record recent calls to rem set operations.") \ | |
219 \ | |
220 develop(intx, G1MaxVerifyFailures, -1, \ | |
221 "The maximum number of verification failrues to print. " \ | |
222 "-1 means print all.") \ | |
223 \ | |
224 develop(bool, G1ScrubRemSets, true, \ | |
225 "When true, do RS scrubbing after cleanup.") \ | |
226 \ | |
227 develop(bool, G1RSScrubVerbose, false, \ | |
228 "When true, do RS scrubbing with verbose output.") \ | |
229 \ | |
230 develop(bool, G1YoungSurvRateVerbose, false, \ | |
231 "print out the survival rate of young regions according to age.") \ | |
232 \ | |
233 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
234 "the number of regions for which we'll print a surv rate " \ | |
235 "summary.") \ | |
236 \ | |
1282 | 237 product(intx, G1ReservePercent, 10, \ |
342 | 238 "It determines the minimum reserve we should have in the heap " \ |
239 "to minimize the probability of promotion failure.") \ | |
240 \ | |
1282 | 241 diagnostic(bool, G1PrintHeapRegions, false, \ |
342 | 242 "If set G1 will print information on which regions are being " \ |
243 "allocated and which are reclaimed.") \ | |
244 \ | |
245 develop(bool, G1HRRSUseSparseTable, true, \ | |
246 "When true, use sparse table to save space.") \ | |
247 \ | |
248 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
249 "Forces flushing of log buffers before verification.") \ | |
250 \ | |
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251 develop(bool, G1FailOnFPError, false, \ |
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252 "When set, G1 will fail when it encounters an FP 'error', " \ |
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253 "so as to allow debugging") \ |
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254 \ |
751 | 255 develop(bool, G1FixedTenuringThreshold, false, \ |
545 | 256 "When set, G1 will not adjust the tenuring threshold") \ |
257 \ | |
751 | 258 develop(bool, G1FixedEdenSize, false, \ |
545 | 259 "When set, G1 will not allocate unused survivor space regions") \ |
260 \ | |
751 | 261 develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
545 | 262 "If non-0 is the size of the G1 survivor space, " \ |
638
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263 "otherwise SurvivorRatio is used to determine the size") \ |
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264 \ |
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265 product(uintx, G1HeapRegionSize, 0, \ |
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266 "Size of the G1 regions.") \ |
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267 \ |
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268 experimental(bool, G1UseParallelRSetUpdating, true, \ |
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269 "Enables the parallelization of remembered set updating " \ |
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270 "during evacuation pauses") \ |
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271 \ |
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272 experimental(bool, G1UseParallelRSetScanning, true, \ |
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273 "Enables the parallelization of remembered set scanning " \ |
794 | 274 "during evacuation pauses") \ |
275 \ | |
1282 | 276 product(uintx, G1ConcRefinementThreads, 0, \ |
794 | 277 "If non-0 is the number of parallel rem set update threads, " \ |
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278 "otherwise the value is determined ergonomically.") \ |
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279 \ |
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280 develop(intx, G1CardCountCacheExpandThreshold, 16, \ |
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281 "Expand the card count cache if the number of collisions for " \ |
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282 "a particular entry exceeds this value.") \ |
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283 \ |
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284 develop(bool, G1VerifyCTCleanup, false, \ |
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285 "Verify card table cleanup.") \ |
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286 \ |
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287 product(uintx, G1RSetScanBlockSize, 64, \ |
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288 "Size of a work unit of cards claimed by a worker thread" \ |
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289 "during RSet scanning.") \ |
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290 \ |
2152 | 291 develop(uintx, G1SecondaryFreeListAppendLength, 5, \ |
292 "The number of regions we will add to the secondary free list " \ | |
293 "at every append operation") \ | |
294 \ | |
295 develop(bool, G1ConcRegionFreeingVerbose, false, \ | |
296 "Enables verboseness during concurrent region freeing") \ | |
297 \ | |
298 develop(bool, G1StressConcRegionFreeing, false, \ | |
299 "It stresses the concurrent region freeing operation") \ | |
300 \ | |
301 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ | |
302 "Artificial delay during concurrent region freeing") \ | |
303 \ | |
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304 develop(bool, ReduceInitialCardMarksForG1, false, \ |
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305 "When ReduceInitialCardMarks is true, this flag setting " \ |
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306 " controls whether G1 allows the RICM optimization") \ |
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307 \ |
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308 develop(bool, G1ExitOnExpansionFailure, false, \ |
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309 "Raise a fatal VM exit out of memory failure in the event " \ |
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310 " that heap expansion fails due to running out of swap.") |
342 | 311 |
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312 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) |
1972 | 313 |
314 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP |