Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 806:821269eca479
6820167: GCALotAtAllSafepoints + FullGCALot(ScavengeALot) options crash JVM
Summary: Short-circuit gc-a-lot attempts by non-JavaThreads; SkipGCALot c'tor to elide re-entrant gc-a-lot attempts.
Reviewed-by: apetrusenko, jcoomes, jmasa, kamg
author | ysr |
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date | Thu, 11 Jun 2009 12:40:00 -0700 |
parents | 315a5d70b295 |
children | df6caf649ff7 |
rev | line source |
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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 \ | |
83 develop(bool, G1ConcMark, true, \ | |
84 "If true, run concurrent marking for G1") \ | |
85 \ | |
751 | 86 product(intx, G1MarkStackSize, 2 * 1024 * 1024, \ |
342 | 87 "Size of the mark stack for concurrent marking.") \ |
88 \ | |
751 | 89 product(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
342 | 90 "Size of the region stack for concurrent marking.") \ |
91 \ | |
92 develop(bool, G1ConcRefine, true, \ | |
93 "If true, run concurrent rem set refinement for G1") \ | |
94 \ | |
95 develop(intx, G1ConcRefineTargTraversals, 4, \ | |
96 "Number of concurrent refinement we try to achieve") \ | |
97 \ | |
98 develop(intx, G1ConcRefineInitialDelta, 4, \ | |
99 "Number of heap regions of alloc ahead of starting collection " \ | |
100 "pause to start concurrent refinement (initially)") \ | |
101 \ | |
751 | 102 develop(bool, G1SmoothConcRefine, true, \ |
342 | 103 "Attempts to smooth out the overhead of concurrent refinement") \ |
104 \ | |
105 develop(bool, G1ConcZeroFill, true, \ | |
106 "If true, run concurrent zero-filling thread") \ | |
107 \ | |
108 develop(intx, G1ConcZFMaxRegions, 1, \ | |
109 "Stop zero-filling when # of zf'd regions reaches") \ | |
110 \ | |
111 product(intx, G1SteadyStateUsed, 90, \ | |
112 "If non-0, try to maintain 'used' at this pct (of max)") \ | |
113 \ | |
114 product(intx, G1SteadyStateUsedDelta, 30, \ | |
115 "If G1SteadyStateUsed is non-0, then do pause this number of " \ | |
116 "of percentage points earlier if no marking is in progress.") \ | |
117 \ | |
118 develop(bool, G1SATBBarrierPrintNullPreVals, false, \ | |
119 "If true, count frac of ptr writes with null pre-vals.") \ | |
120 \ | |
121 product(intx, G1SATBLogBufferSize, 1*K, \ | |
122 "Number of entries in an SATB log buffer.") \ | |
123 \ | |
124 product(intx, G1SATBProcessCompletedThreshold, 20, \ | |
125 "Number of completed buffers that triggers log processing.") \ | |
126 \ | |
127 develop(intx, G1ExtraRegionSurvRate, 33, \ | |
128 "If the young survival rate is S, and there's room left in " \ | |
129 "to-space, we will allow regions whose survival rate is up to " \ | |
130 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
131 \ | |
132 develop(intx, G1InitYoungSurvRatio, 50, \ | |
133 "Expected Survival Rate for newly allocated bytes") \ | |
134 \ | |
135 develop(bool, G1SATBPrintStubs, false, \ | |
136 "If true, print generated stubs for the SATB barrier") \ | |
137 \ | |
751 | 138 product(intx, G1ExpandByPercentOfAvailable, 20, \ |
342 | 139 "When expanding, % of uncommitted space to claim.") \ |
140 \ | |
141 develop(bool, G1RSBarrierRegionFilter, true, \ | |
142 "If true, generate region filtering code in RS barrier") \ | |
143 \ | |
144 develop(bool, G1RSBarrierNullFilter, true, \ | |
145 "If true, generate null-pointer filtering code in RS barrier") \ | |
146 \ | |
147 develop(bool, G1PrintCTFilterStats, false, \ | |
148 "If true, print stats on RS filtering effectiveness") \ | |
149 \ | |
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150 develop(bool, G1DeferredRSUpdate, true, \ |
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151 "If true, use deferred RS updates") \ |
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152 \ |
342 | 153 develop(bool, G1RSLogCheckCardTable, false, \ |
154 "If true, verify that no dirty cards remain after RS log " \ | |
155 "processing.") \ | |
156 \ | |
157 develop(bool, G1RSCountHisto, false, \ | |
158 "If true, print a histogram of RS occupancies after each pause") \ | |
159 \ | |
160 develop(intx, G1PrintRegionLivenessInfo, 0, \ | |
161 "When > 0, print the occupancies of the <n> best and worst" \ | |
162 "regions.") \ | |
163 \ | |
164 develop(bool, G1PrintParCleanupStats, false, \ | |
165 "When true, print extra stats about parallel cleanup.") \ | |
166 \ | |
167 develop(bool, G1DisablePreBarrier, false, \ | |
168 "Disable generation of pre-barrier (i.e., marking barrier) ") \ | |
169 \ | |
170 develop(bool, G1DisablePostBarrier, false, \ | |
171 "Disable generation of post-barrier (i.e., RS barrier) ") \ | |
172 \ | |
173 product(intx, G1DirtyCardQueueMax, 30, \ | |
174 "Maximum number of completed RS buffers before mutator threads " \ | |
175 "start processing them.") \ | |
176 \ | |
177 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
178 "Log base 2 of the length of conc RS hot-card cache.") \ | |
179 \ | |
751 | 180 develop(bool, G1ConcRSCountTraversals, false, \ |
342 | 181 "If true, gather data about the number of times CR traverses " \ |
182 "cards ") \ | |
183 \ | |
751 | 184 develop(intx, G1ConcRSHotCardLimit, 4, \ |
342 | 185 "The threshold that defines (>=) a hot card.") \ |
186 \ | |
187 develop(bool, G1PrintOopAppls, false, \ | |
188 "When true, print applications of closures to external locs.") \ | |
189 \ | |
751 | 190 develop(intx, G1LogRSRegionEntries, 7, \ |
342 | 191 "Log_2 of max number of regions for which we keep bitmaps.") \ |
192 \ | |
193 develop(bool, G1RecordHRRSOops, false, \ | |
194 "When true, record recent calls to rem set operations.") \ | |
195 \ | |
196 develop(bool, G1RecordHRRSEvents, false, \ | |
197 "When true, record recent calls to rem set operations.") \ | |
198 \ | |
199 develop(intx, G1MaxVerifyFailures, -1, \ | |
200 "The maximum number of verification failrues to print. " \ | |
201 "-1 means print all.") \ | |
202 \ | |
203 develop(bool, G1ScrubRemSets, true, \ | |
204 "When true, do RS scrubbing after cleanup.") \ | |
205 \ | |
206 develop(bool, G1RSScrubVerbose, false, \ | |
207 "When true, do RS scrubbing with verbose output.") \ | |
208 \ | |
209 develop(bool, G1YoungSurvRateVerbose, false, \ | |
210 "print out the survival rate of young regions according to age.") \ | |
211 \ | |
212 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
213 "the number of regions for which we'll print a surv rate " \ | |
214 "summary.") \ | |
215 \ | |
216 product(bool, G1UseScanOnlyPrefix, false, \ | |
217 "It determines whether the system will calculate an optimum " \ | |
218 "scan-only set.") \ | |
219 \ | |
751 | 220 product(intx, G1MinReservePercent, 10, \ |
342 | 221 "It determines the minimum reserve we should have in the heap " \ |
222 "to minimize the probability of promotion failure.") \ | |
223 \ | |
751 | 224 diagnostic(bool, G1PrintRegions, false, \ |
342 | 225 "If set G1 will print information on which regions are being " \ |
226 "allocated and which are reclaimed.") \ | |
227 \ | |
228 develop(bool, G1HRRSUseSparseTable, true, \ | |
229 "When true, use sparse table to save space.") \ | |
230 \ | |
231 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
232 "Forces flushing of log buffers before verification.") \ | |
233 \ | |
751 | 234 product(bool, G1UseSurvivorSpaces, true, \ |
545 | 235 "When true, use survivor space.") \ |
236 \ | |
751 | 237 develop(bool, G1FixedTenuringThreshold, false, \ |
545 | 238 "When set, G1 will not adjust the tenuring threshold") \ |
239 \ | |
751 | 240 develop(bool, G1FixedEdenSize, false, \ |
545 | 241 "When set, G1 will not allocate unused survivor space regions") \ |
242 \ | |
751 | 243 develop(uintx, G1FixedSurvivorSpaceSize, 0, \ |
545 | 244 "If non-0 is the size of the G1 survivor space, " \ |
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245 "otherwise SurvivorRatio is used to determine the size") \ |
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246 \ |
751 | 247 experimental(bool, G1ParallelRSetUpdatingEnabled, false, \ |
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248 "Enables the parallelization of remembered set updating " \ |
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249 "during evacuation pauses") \ |
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250 \ |
751 | 251 experimental(bool, G1ParallelRSetScanningEnabled, false, \ |
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252 "Enables the parallelization of remembered set scanning " \ |
794 | 253 "during evacuation pauses") \ |
254 \ | |
255 product(uintx, G1ParallelRSetThreads, 0, \ | |
256 "If non-0 is the number of parallel rem set update threads, " \ | |
257 "otherwise the value is determined ergonomically.") | |
342 | 258 |
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259 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) |