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src/share/vm/gc_implementation/g1/g1_globals.hpp@c32059ef4dc0
src/share/vm/gc_implementation/g1/g1_globals.hpp
Tue, 12 Oct 2010 09:36:48 -0700
- author
- johnc
- date
- Tue, 12 Oct 2010 09:36:48 -0700
- changeset 2216
- c32059ef4dc0
- parent 1949
- b9bc732be7c0
- child 2314
- f95d63e2154a
- permissions
- -rw-r--r--
6971296: G1: simplify G1RemSet class hierarchy
Summary: Remove G1RemSet base class and StupidG1RemSet class; rename HRInto_G1RemSet to just G1RemSet.
Reviewed-by: ysr, tonyp
1 /*
2 * Copyright (c) 2001, 2010, 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 */
25 //
26 // Defines all globals flags used by the garbage-first compiler.
27 //
29 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
30 \
31 product(intx, G1ConfidencePercent, 50, \
32 "Confidence level for MMU/pause predictions") \
33 \
34 develop(intx, G1MarkingOverheadPercent, 0, \
35 "Overhead of concurrent marking") \
36 \
37 develop(bool, G1Gen, true, \
38 "If true, it will enable the generational G1") \
39 \
40 develop(intx, G1PolicyVerbose, 0, \
41 "The verbosity level on G1 policy decisions") \
42 \
43 develop(intx, G1MarkingVerboseLevel, 0, \
44 "Level (0-4) of verboseness of the marking code") \
45 \
46 develop(bool, G1PrintReachableAtInitialMark, false, \
47 "Reachable object dump at the initial mark pause") \
48 \
49 develop(bool, G1VerifyDuringGCPrintReachable, false, \
50 "If conc mark verification fails, dump reachable objects") \
51 \
52 develop(ccstr, G1PrintReachableBaseFile, NULL, \
53 "The base file name for the reachable object dumps") \
54 \
55 develop(bool, G1TraceMarkStackOverflow, false, \
56 "If true, extra debugging code for CM restart for ovflw.") \
57 \
58 develop(intx, G1PausesBtwnConcMark, -1, \
59 "If positive, fixed number of pauses between conc markings") \
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 \
73 diagnostic(bool, G1SummarizeZFStats, false, \
74 "Summarize zero-filling info") \
75 \
76 diagnostic(bool, G1TraceConcRefinement, false, \
77 "Trace G1 concurrent refinement") \
78 \
79 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
80 "Size of the region stack for concurrent marking.") \
81 \
82 develop(bool, G1ConcZeroFill, true, \
83 "If true, run concurrent zero-filling thread") \
84 \
85 develop(intx, G1ConcZFMaxRegions, 1, \
86 "Stop zero-filling when # of zf'd regions reaches") \
87 \
88 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
89 "If true, count frac of ptr writes with null pre-vals.") \
90 \
91 product(intx, G1SATBBufferSize, 1*K, \
92 "Number of entries in an SATB log buffer.") \
93 \
94 develop(intx, G1SATBProcessCompletedThreshold, 20, \
95 "Number of completed buffers that triggers log processing.") \
96 \
97 develop(intx, G1ExtraRegionSurvRate, 33, \
98 "If the young survival rate is S, and there's room left in " \
99 "to-space, we will allow regions whose survival rate is up to " \
100 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
101 \
102 develop(intx, G1InitYoungSurvRatio, 50, \
103 "Expected Survival Rate for newly allocated bytes") \
104 \
105 develop(bool, G1SATBPrintStubs, false, \
106 "If true, print generated stubs for the SATB barrier") \
107 \
108 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
109 "When expanding, % of uncommitted space to claim.") \
110 \
111 develop(bool, G1RSBarrierRegionFilter, true, \
112 "If true, generate region filtering code in RS barrier") \
113 \
114 develop(bool, G1RSBarrierNullFilter, true, \
115 "If true, generate null-pointer filtering code in RS barrier") \
116 \
117 develop(bool, G1PrintCTFilterStats, false, \
118 "If true, print stats on RS filtering effectiveness") \
119 \
120 develop(bool, G1DeferredRSUpdate, true, \
121 "If true, use deferred RS updates") \
122 \
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 \
130 develop(intx, G1PrintRegionLivenessInfo, 0, \
131 "When > 0, print the occupancies of the <n> best and worst" \
132 "regions.") \
133 \
134 develop(bool, G1PrintParCleanupStats, false, \
135 "When true, print extra stats about parallel cleanup.") \
136 \
137 develop(bool, G1DisablePreBarrier, false, \
138 "Disable generation of pre-barrier (i.e., marking barrier) ") \
139 \
140 develop(bool, G1DisablePostBarrier, false, \
141 "Disable generation of post-barrier (i.e., RS barrier) ") \
142 \
143 product(intx, G1UpdateBufferSize, 256, \
144 "Size of an update buffer") \
145 \
146 product(intx, G1ConcRefinementYellowZone, 0, \
147 "Number of enqueued update buffers that will " \
148 "trigger concurrent processing. Will be selected ergonomically " \
149 "by default.") \
150 \
151 product(intx, G1ConcRefinementRedZone, 0, \
152 "Maximum number of enqueued update buffers before mutator " \
153 "threads start processing new ones instead of enqueueing them. " \
154 "Will be selected ergonomically by default. Zero will disable " \
155 "concurrent processing.") \
156 \
157 product(intx, G1ConcRefinementGreenZone, 0, \
158 "The number of update buffers that are left in the queue by the " \
159 "concurrent processing threads. Will be selected ergonomically " \
160 "by default.") \
161 \
162 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
163 "The last concurrent refinement thread wakes up every " \
164 "specified number of milliseconds to do miscellaneous work.") \
165 \
166 product(intx, G1ConcRefinementThresholdStep, 0, \
167 "Each time the rset update queue increases by this amount " \
168 "activate the next refinement thread if available. " \
169 "Will be selected ergonomically by default.") \
170 \
171 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
172 "A target percentage of time that is allowed to be spend on " \
173 "process RS update buffers during the collection pause.") \
174 \
175 product(bool, G1UseAdaptiveConcRefinement, true, \
176 "Select green, yellow and red zones adaptively to meet the " \
177 "the pause requirements.") \
178 \
179 develop(intx, G1ConcRSLogCacheSize, 10, \
180 "Log base 2 of the length of conc RS hot-card cache.") \
181 \
182 develop(intx, G1ConcRSHotCardLimit, 4, \
183 "The threshold that defines (>=) a hot card.") \
184 \
185 develop(bool, G1PrintOopAppls, false, \
186 "When true, print applications of closures to external locs.") \
187 \
188 develop(intx, G1RSetRegionEntriesBase, 256, \
189 "Max number of regions in a fine-grain table per MB.") \
190 \
191 product(intx, G1RSetRegionEntries, 0, \
192 "Max number of regions for which we keep bitmaps." \
193 "Will be set ergonomically by default") \
194 \
195 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
196 "Max number of entries per region in a sparse table " \
197 "per MB.") \
198 \
199 product(intx, G1RSetSparseRegionEntries, 0, \
200 "Max number of entries per region in a sparse table." \
201 "Will be set ergonomically by default.") \
202 \
203 develop(bool, G1RecordHRRSOops, false, \
204 "When true, record recent calls to rem set operations.") \
205 \
206 develop(bool, G1RecordHRRSEvents, false, \
207 "When true, record recent calls to rem set operations.") \
208 \
209 develop(intx, G1MaxVerifyFailures, -1, \
210 "The maximum number of verification failrues to print. " \
211 "-1 means print all.") \
212 \
213 develop(bool, G1ScrubRemSets, true, \
214 "When true, do RS scrubbing after cleanup.") \
215 \
216 develop(bool, G1RSScrubVerbose, false, \
217 "When true, do RS scrubbing with verbose output.") \
218 \
219 develop(bool, G1YoungSurvRateVerbose, false, \
220 "print out the survival rate of young regions according to age.") \
221 \
222 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
223 "the number of regions for which we'll print a surv rate " \
224 "summary.") \
225 \
226 product(intx, G1ReservePercent, 10, \
227 "It determines the minimum reserve we should have in the heap " \
228 "to minimize the probability of promotion failure.") \
229 \
230 diagnostic(bool, G1PrintHeapRegions, false, \
231 "If set G1 will print information on which regions are being " \
232 "allocated and which are reclaimed.") \
233 \
234 develop(bool, G1HRRSUseSparseTable, true, \
235 "When true, use sparse table to save space.") \
236 \
237 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
238 "Forces flushing of log buffers before verification.") \
239 \
240 develop(bool, G1FailOnFPError, false, \
241 "When set, G1 will fail when it encounters an FP 'error', " \
242 "so as to allow debugging") \
243 \
244 develop(bool, G1FixedTenuringThreshold, false, \
245 "When set, G1 will not adjust the tenuring threshold") \
246 \
247 develop(bool, G1FixedEdenSize, false, \
248 "When set, G1 will not allocate unused survivor space regions") \
249 \
250 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
251 "If non-0 is the size of the G1 survivor space, " \
252 "otherwise SurvivorRatio is used to determine the size") \
253 \
254 product(uintx, G1HeapRegionSize, 0, \
255 "Size of the G1 regions.") \
256 \
257 experimental(bool, G1UseParallelRSetUpdating, true, \
258 "Enables the parallelization of remembered set updating " \
259 "during evacuation pauses") \
260 \
261 experimental(bool, G1UseParallelRSetScanning, true, \
262 "Enables the parallelization of remembered set scanning " \
263 "during evacuation pauses") \
264 \
265 product(uintx, G1ConcRefinementThreads, 0, \
266 "If non-0 is the number of parallel rem set update threads, " \
267 "otherwise the value is determined ergonomically.") \
268 \
269 develop(intx, G1CardCountCacheExpandThreshold, 16, \
270 "Expand the card count cache if the number of collisions for " \
271 "a particular entry exceeds this value.") \
272 \
273 develop(bool, G1VerifyCTCleanup, false, \
274 "Verify card table cleanup.") \
275 \
276 product(uintx, G1RSetScanBlockSize, 64, \
277 "Size of a work unit of cards claimed by a worker thread" \
278 "during RSet scanning.") \
279 \
280 develop(bool, ReduceInitialCardMarksForG1, false, \
281 "When ReduceInitialCardMarks is true, this flag setting " \
282 " controls whether G1 allows the RICM optimization")
284 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)
