Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 4090:a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
Summary: Major cleanup of the G1CollectorPolicy class. It removes a lot of unused fields and methods and also consolidates replicated information (mainly various ways of counting the number of CSet regions) into one copy.
Reviewed-by: johnc, brutisso
author | tonyp |
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date | Fri, 18 Nov 2011 12:52:27 -0500 |
parents | 246daf2c601d |
children | 1cbe7978b021 |
rev | line source |
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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 | |
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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 \ | |
42 develop(intx, G1MarkingVerboseLevel, 0, \ | |
43 "Level (0-4) of verboseness of the marking code") \ | |
44 \ | |
1044 | 45 develop(bool, G1PrintReachableAtInitialMark, false, \ |
46 "Reachable object dump at the initial mark pause") \ | |
47 \ | |
48 develop(bool, G1VerifyDuringGCPrintReachable, false, \ | |
49 "If conc mark verification fails, dump reachable objects") \ | |
50 \ | |
51 develop(ccstr, G1PrintReachableBaseFile, NULL, \ | |
52 "The base file name for the reachable object dumps") \ | |
342 | 53 \ |
54 develop(bool, G1TraceMarkStackOverflow, false, \ | |
55 "If true, extra debugging code for CM restart for ovflw.") \ | |
56 \ | |
1282 | 57 diagnostic(bool, G1SummarizeConcMark, false, \ |
342 | 58 "Summarize concurrent mark info") \ |
59 \ | |
751 | 60 diagnostic(bool, G1SummarizeRSetStats, false, \ |
342 | 61 "Summarize remembered set processing info") \ |
62 \ | |
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63 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \ |
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64 "The period (in number of GCs) at which we will generate " \ |
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65 "update buffer processing info " \ |
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66 "(0 means do not periodically generate this info); " \ |
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67 "it also requires -XX:+G1SummarizeRSetStats") \ |
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68 \ |
1282 | 69 diagnostic(bool, G1TraceConcRefinement, false, \ |
342 | 70 "Trace G1 concurrent refinement") \ |
71 \ | |
751 | 72 product(intx, G1MarkRegionStackSize, 1024 * 1024, \ |
342 | 73 "Size of the region stack for concurrent marking.") \ |
74 \ | |
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75 product(double, G1ConcMarkStepDurationMillis, 10.0, \ |
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76 "Target duration of individual concurrent marking steps " \ |
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77 "in milliseconds.") \ |
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78 \ |
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79 product(intx, G1RefProcDrainInterval, 10, \ |
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80 "The number of discovered reference objects to process before " \ |
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81 "draining concurrent marking work queues.") \ |
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82 \ |
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83 experimental(bool, G1UseConcMarkReferenceProcessing, true, \ |
2436 | 84 "If true, enable reference discovery during concurrent " \ |
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85 "marking and reference processing at the end of remark.") \ |
342 | 86 \ |
1282 | 87 product(intx, G1SATBBufferSize, 1*K, \ |
342 | 88 "Number of entries in an SATB log buffer.") \ |
89 \ | |
1282 | 90 develop(intx, G1SATBProcessCompletedThreshold, 20, \ |
342 | 91 "Number of completed buffers that triggers log processing.") \ |
92 \ | |
2149 | 93 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \ |
94 "Before enqueueing them, each mutator thread tries to do some " \ | |
95 "filtering on the SATB buffers it generates. If post-filtering " \ | |
96 "the percentage of retained entries is over this threshold " \ | |
97 "the buffer will be enqueued for processing. A value of 0 " \ | |
98 "specifies that mutator threads should not do such filtering.") \ | |
99 \ | |
342 | 100 develop(intx, G1ExtraRegionSurvRate, 33, \ |
101 "If the young survival rate is S, and there's room left in " \ | |
102 "to-space, we will allow regions whose survival rate is up to " \ | |
103 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \ | |
104 \ | |
105 develop(intx, G1InitYoungSurvRatio, 50, \ | |
106 "Expected Survival Rate for newly allocated bytes") \ | |
107 \ | |
108 develop(bool, G1SATBPrintStubs, false, \ | |
109 "If true, print generated stubs for the SATB barrier") \ | |
110 \ | |
1282 | 111 experimental(intx, G1ExpandByPercentOfAvailable, 20, \ |
342 | 112 "When expanding, % of uncommitted space to claim.") \ |
113 \ | |
114 develop(bool, G1RSBarrierRegionFilter, true, \ | |
115 "If true, generate region filtering code in RS barrier") \ | |
116 \ | |
117 develop(bool, G1RSBarrierNullFilter, true, \ | |
118 "If true, generate null-pointer filtering code in RS barrier") \ | |
119 \ | |
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120 develop(bool, G1DeferredRSUpdate, true, \ |
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121 "If true, use deferred RS updates") \ |
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122 \ |
342 | 123 develop(bool, G1RSLogCheckCardTable, false, \ |
124 "If true, verify that no dirty cards remain after RS log " \ | |
125 "processing.") \ | |
126 \ | |
127 develop(bool, G1RSCountHisto, false, \ | |
128 "If true, print a histogram of RS occupancies after each pause") \ | |
129 \ | |
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130 diagnostic(bool, G1PrintRegionLivenessInfo, false, \ |
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131 "Prints the liveness information for all regions in the heap " \ |
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132 "at the end of a marking cycle.") \ |
342 | 133 \ |
134 develop(bool, G1PrintParCleanupStats, false, \ | |
135 "When true, print extra stats about parallel cleanup.") \ | |
136 \ | |
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137 product(intx, G1UpdateBufferSize, 256, \ |
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138 "Size of an update buffer") \ |
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139 \ |
1282 | 140 product(intx, G1ConcRefinementYellowZone, 0, \ |
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141 "Number of enqueued update buffers that will " \ |
1111 | 142 "trigger concurrent processing. Will be selected ergonomically " \ |
143 "by default.") \ | |
144 \ | |
1282 | 145 product(intx, G1ConcRefinementRedZone, 0, \ |
1111 | 146 "Maximum number of enqueued update buffers before mutator " \ |
147 "threads start processing new ones instead of enqueueing them. " \ | |
148 "Will be selected ergonomically by default. Zero will disable " \ | |
149 "concurrent processing.") \ | |
150 \ | |
1282 | 151 product(intx, G1ConcRefinementGreenZone, 0, \ |
1111 | 152 "The number of update buffers that are left in the queue by the " \ |
153 "concurrent processing threads. Will be selected ergonomically " \ | |
154 "by default.") \ | |
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155 \ |
1282 | 156 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \ |
1111 | 157 "The last concurrent refinement thread wakes up every " \ |
158 "specified number of milliseconds to do miscellaneous work.") \ | |
159 \ | |
1282 | 160 product(intx, G1ConcRefinementThresholdStep, 0, \ |
1111 | 161 "Each time the rset update queue increases by this amount " \ |
162 "activate the next refinement thread if available. " \ | |
163 "Will be selected ergonomically by default.") \ | |
164 \ | |
1282 | 165 product(intx, G1RSetUpdatingPauseTimePercent, 10, \ |
1111 | 166 "A target percentage of time that is allowed to be spend on " \ |
167 "process RS update buffers during the collection pause.") \ | |
168 \ | |
1282 | 169 product(bool, G1UseAdaptiveConcRefinement, true, \ |
1111 | 170 "Select green, yellow and red zones adaptively to meet the " \ |
171 "the pause requirements.") \ | |
342 | 172 \ |
173 develop(intx, G1ConcRSLogCacheSize, 10, \ | |
174 "Log base 2 of the length of conc RS hot-card cache.") \ | |
175 \ | |
751 | 176 develop(intx, G1ConcRSHotCardLimit, 4, \ |
342 | 177 "The threshold that defines (>=) a hot card.") \ |
178 \ | |
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179 develop(intx, G1MaxHotCardCountSizePercent, 25, \ |
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180 "The maximum size of the hot card count cache as a " \ |
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181 "percentage of the number of cards for the maximum heap.") \ |
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182 \ |
342 | 183 develop(bool, G1PrintOopAppls, false, \ |
184 "When true, print applications of closures to external locs.") \ | |
185 \ | |
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186 develop(intx, G1RSetRegionEntriesBase, 256, \ |
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187 "Max number of regions in a fine-grain table per MB.") \ |
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188 \ |
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189 product(intx, G1RSetRegionEntries, 0, \ |
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190 "Max number of regions for which we keep bitmaps." \ |
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191 "Will be set ergonomically by default") \ |
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192 \ |
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193 develop(intx, G1RSetSparseRegionEntriesBase, 4, \ |
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194 "Max number of entries per region in a sparse table " \ |
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195 "per MB.") \ |
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196 \ |
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197 product(intx, G1RSetSparseRegionEntries, 0, \ |
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198 "Max number of entries per region in a sparse table." \ |
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199 "Will be set ergonomically by default.") \ |
342 | 200 \ |
201 develop(bool, G1RecordHRRSOops, false, \ | |
202 "When true, record recent calls to rem set operations.") \ | |
203 \ | |
204 develop(bool, G1RecordHRRSEvents, false, \ | |
205 "When true, record recent calls to rem set operations.") \ | |
206 \ | |
207 develop(intx, G1MaxVerifyFailures, -1, \ | |
208 "The maximum number of verification failrues to print. " \ | |
209 "-1 means print all.") \ | |
210 \ | |
211 develop(bool, G1ScrubRemSets, true, \ | |
212 "When true, do RS scrubbing after cleanup.") \ | |
213 \ | |
214 develop(bool, G1RSScrubVerbose, false, \ | |
215 "When true, do RS scrubbing with verbose output.") \ | |
216 \ | |
217 develop(bool, G1YoungSurvRateVerbose, false, \ | |
218 "print out the survival rate of young regions according to age.") \ | |
219 \ | |
220 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \ | |
221 "the number of regions for which we'll print a surv rate " \ | |
222 "summary.") \ | |
223 \ | |
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224 product(uintx, G1ReservePercent, 10, \ |
342 | 225 "It determines the minimum reserve we should have in the heap " \ |
226 "to minimize the probability of promotion failure.") \ | |
227 \ | |
1282 | 228 diagnostic(bool, G1PrintHeapRegions, false, \ |
342 | 229 "If set G1 will print information on which regions are being " \ |
230 "allocated and which are reclaimed.") \ | |
231 \ | |
232 develop(bool, G1HRRSUseSparseTable, true, \ | |
233 "When true, use sparse table to save space.") \ | |
234 \ | |
235 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \ | |
236 "Forces flushing of log buffers before verification.") \ | |
237 \ | |
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238 develop(bool, G1FailOnFPError, false, \ |
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239 "When set, G1 will fail when it encounters an FP 'error', " \ |
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240 "so as to allow debugging") \ |
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241 \ |
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242 product(uintx, G1HeapRegionSize, 0, \ |
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243 "Size of the G1 regions.") \ |
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244 \ |
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245 experimental(bool, G1UseParallelRSetUpdating, true, \ |
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246 "Enables the parallelization of remembered set updating " \ |
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247 "during evacuation pauses") \ |
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248 \ |
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249 experimental(bool, G1UseParallelRSetScanning, true, \ |
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250 "Enables the parallelization of remembered set scanning " \ |
794 | 251 "during evacuation pauses") \ |
252 \ | |
1282 | 253 product(uintx, G1ConcRefinementThreads, 0, \ |
794 | 254 "If non-0 is the number of parallel rem set update threads, " \ |
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255 "otherwise the value is determined ergonomically.") \ |
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256 \ |
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257 develop(intx, G1CardCountCacheExpandThreshold, 16, \ |
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258 "Expand the card count cache if the number of collisions for " \ |
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259 "a particular entry exceeds this value.") \ |
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260 \ |
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261 develop(bool, G1VerifyCTCleanup, false, \ |
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262 "Verify card table cleanup.") \ |
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263 \ |
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264 product(uintx, G1RSetScanBlockSize, 64, \ |
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265 "Size of a work unit of cards claimed by a worker thread" \ |
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266 "during RSet scanning.") \ |
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267 \ |
2152 | 268 develop(uintx, G1SecondaryFreeListAppendLength, 5, \ |
269 "The number of regions we will add to the secondary free list " \ | |
270 "at every append operation") \ | |
271 \ | |
272 develop(bool, G1ConcRegionFreeingVerbose, false, \ | |
273 "Enables verboseness during concurrent region freeing") \ | |
274 \ | |
275 develop(bool, G1StressConcRegionFreeing, false, \ | |
276 "It stresses the concurrent region freeing operation") \ | |
277 \ | |
278 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ | |
279 "Artificial delay during concurrent region freeing") \ | |
280 \ | |
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281 develop(uintx, G1DummyRegionsPerGC, 0, \ |
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282 "The number of dummy regions G1 will allocate at the end of " \ |
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283 "each evacuation pause in order to artificially fill up the " \ |
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284 "heap and stress the marking implementation.") \ |
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285 \ |
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286 develop(bool, G1ExitOnExpansionFailure, false, \ |
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287 "Raise a fatal VM exit out of memory failure in the event " \ |
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288 " that heap expansion fails due to running out of swap.") \ |
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289 \ |
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290 develop(uintx, G1ConcMarkForceOverflow, 0, \ |
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291 "The number of times we'll force an overflow during " \ |
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292 "concurrent marking") |
342 | 293 |
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294 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 | 295 |
296 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP |