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src/share/vm/gc_implementation/g1/g1_globals.hpp@27f6a9b9c311
src/share/vm/gc_implementation/g1/g1_globals.hpp
Wed, 29 Jul 2009 11:01:26 -0400
- author
- tonyp
- date
- Wed, 29 Jul 2009 11:01:26 -0400
- changeset 1318
- 27f6a9b9c311
- parent 1280
- df6caf649ff7
- child 1319
- 83b687ce3090
- permissions
- -rw-r--r--
6864886: G1: rename -XX parameters related to update buffers
Summary: renaming a couple of update buffer-related parameters to make them more understandable and consistent.
Reviewed-by: iveresov, ysr
1 /*
2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 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 */
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, G1ParallelGCAllocBufferSize, 8*K, \
32 "Size of parallel G1 allocation buffers in to-space.") \
33 \
34 product(intx, G1ConfidencePercent, 50, \
35 "Confidence level for MMU/pause predictions") \
36 \
37 develop(intx, G1MarkingOverheadPercent, 0, \
38 "Overhead of concurrent marking") \
39 \
40 develop(bool, G1AccountConcurrentOverhead, false, \
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 \
47 develop(bool, G1Gen, true, \
48 "If true, it will enable the generational G1") \
49 \
50 develop(intx, G1GCPercent, 10, \
51 "The desired percent time spent on GC") \
52 \
53 develop(intx, G1PolicyVerbose, 0, \
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 \
62 develop(bool, G1VerifyConcMarkPrintReachable, false, \
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 \
71 diagnostic(bool, G1SummarizeConcurrentMark, false, \
72 "Summarize concurrent mark info") \
73 \
74 diagnostic(bool, G1SummarizeRSetStats, false, \
75 "Summarize remembered set processing info") \
76 \
77 diagnostic(bool, G1SummarizeZFStats, false, \
78 "Summarize zero-filling info") \
79 \
80 develop(bool, G1TraceConcurrentRefinement, false, \
81 "Trace G1 concurrent refinement") \
82 \
83 product(intx, G1MarkStackSize, 2 * 1024 * 1024, \
84 "Size of the mark stack for concurrent marking.") \
85 \
86 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
87 "Size of the region stack for concurrent marking.") \
88 \
89 develop(bool, G1ConcRefine, true, \
90 "If true, run concurrent rem set refinement for G1") \
91 \
92 develop(intx, G1ConcRefineTargTraversals, 4, \
93 "Number of concurrent refinement we try to achieve") \
94 \
95 develop(intx, G1ConcRefineInitialDelta, 4, \
96 "Number of heap regions of alloc ahead of starting collection " \
97 "pause to start concurrent refinement (initially)") \
98 \
99 develop(bool, G1SmoothConcRefine, true, \
100 "Attempts to smooth out the overhead of concurrent refinement") \
101 \
102 develop(bool, G1ConcZeroFill, true, \
103 "If true, run concurrent zero-filling thread") \
104 \
105 develop(intx, G1ConcZFMaxRegions, 1, \
106 "Stop zero-filling when # of zf'd regions reaches") \
107 \
108 product(intx, G1SteadyStateUsed, 90, \
109 "If non-0, try to maintain 'used' at this pct (of max)") \
110 \
111 product(intx, G1SteadyStateUsedDelta, 30, \
112 "If G1SteadyStateUsed is non-0, then do pause this number of " \
113 "of percentage points earlier if no marking is in progress.") \
114 \
115 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
116 "If true, count frac of ptr writes with null pre-vals.") \
117 \
118 product(intx, G1SATBLogBufferSize, 1*K, \
119 "Number of entries in an SATB log buffer.") \
120 \
121 product(intx, G1SATBProcessCompletedThreshold, 20, \
122 "Number of completed buffers that triggers log processing.") \
123 \
124 develop(intx, G1ExtraRegionSurvRate, 33, \
125 "If the young survival rate is S, and there's room left in " \
126 "to-space, we will allow regions whose survival rate is up to " \
127 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
128 \
129 develop(intx, G1InitYoungSurvRatio, 50, \
130 "Expected Survival Rate for newly allocated bytes") \
131 \
132 develop(bool, G1SATBPrintStubs, false, \
133 "If true, print generated stubs for the SATB barrier") \
134 \
135 product(intx, G1ExpandByPercentOfAvailable, 20, \
136 "When expanding, % of uncommitted space to claim.") \
137 \
138 develop(bool, G1RSBarrierRegionFilter, true, \
139 "If true, generate region filtering code in RS barrier") \
140 \
141 develop(bool, G1RSBarrierNullFilter, true, \
142 "If true, generate null-pointer filtering code in RS barrier") \
143 \
144 develop(bool, G1PrintCTFilterStats, false, \
145 "If true, print stats on RS filtering effectiveness") \
146 \
147 develop(bool, G1DeferredRSUpdate, true, \
148 "If true, use deferred RS updates") \
149 \
150 develop(bool, G1RSLogCheckCardTable, false, \
151 "If true, verify that no dirty cards remain after RS log " \
152 "processing.") \
153 \
154 develop(bool, G1RSCountHisto, false, \
155 "If true, print a histogram of RS occupancies after each pause") \
156 \
157 develop(intx, G1PrintRegionLivenessInfo, 0, \
158 "When > 0, print the occupancies of the <n> best and worst" \
159 "regions.") \
160 \
161 develop(bool, G1PrintParCleanupStats, false, \
162 "When true, print extra stats about parallel cleanup.") \
163 \
164 develop(bool, G1DisablePreBarrier, false, \
165 "Disable generation of pre-barrier (i.e., marking barrier) ") \
166 \
167 develop(bool, G1DisablePostBarrier, false, \
168 "Disable generation of post-barrier (i.e., RS barrier) ") \
169 \
170 product(intx, G1UpdateBufferSize, 256, \
171 "Size of an update buffer") \
172 \
173 product(intx, G1UpdateBufferQueueProcessingThreshold, 5, \
174 "Number of enqueued update buffers that will " \
175 "trigger concurrent processing") \
176 \
177 product(intx, G1UpdateBufferQueueMaxLength, 30, \
178 "Maximum number of enqueued update buffers before mutator " \
179 "threads start processing new ones instead of enqueueing them") \
180 \
181 develop(intx, G1ConcRSLogCacheSize, 10, \
182 "Log base 2 of the length of conc RS hot-card cache.") \
183 \
184 develop(bool, G1ConcRSCountTraversals, false, \
185 "If true, gather data about the number of times CR traverses " \
186 "cards ") \
187 \
188 develop(intx, G1ConcRSHotCardLimit, 4, \
189 "The threshold that defines (>=) a hot card.") \
190 \
191 develop(bool, G1PrintOopAppls, false, \
192 "When true, print applications of closures to external locs.") \
193 \
194 develop(intx, G1LogRSRegionEntries, 7, \
195 "Log_2 of max number of regions for which we keep bitmaps.") \
196 \
197 develop(bool, G1RecordHRRSOops, false, \
198 "When true, record recent calls to rem set operations.") \
199 \
200 develop(bool, G1RecordHRRSEvents, false, \
201 "When true, record recent calls to rem set operations.") \
202 \
203 develop(intx, G1MaxVerifyFailures, -1, \
204 "The maximum number of verification failrues to print. " \
205 "-1 means print all.") \
206 \
207 develop(bool, G1ScrubRemSets, true, \
208 "When true, do RS scrubbing after cleanup.") \
209 \
210 develop(bool, G1RSScrubVerbose, false, \
211 "When true, do RS scrubbing with verbose output.") \
212 \
213 develop(bool, G1YoungSurvRateVerbose, false, \
214 "print out the survival rate of young regions according to age.") \
215 \
216 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
217 "the number of regions for which we'll print a surv rate " \
218 "summary.") \
219 \
220 product(bool, G1UseScanOnlyPrefix, false, \
221 "It determines whether the system will calculate an optimum " \
222 "scan-only set.") \
223 \
224 product(intx, G1MinReservePercent, 10, \
225 "It determines the minimum reserve we should have in the heap " \
226 "to minimize the probability of promotion failure.") \
227 \
228 diagnostic(bool, G1PrintRegions, false, \
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 \
238 product(bool, G1UseSurvivorSpaces, true, \
239 "When true, use survivor space.") \
240 \
241 develop(bool, G1FixedTenuringThreshold, false, \
242 "When set, G1 will not adjust the tenuring threshold") \
243 \
244 develop(bool, G1FixedEdenSize, false, \
245 "When set, G1 will not allocate unused survivor space regions") \
246 \
247 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
248 "If non-0 is the size of the G1 survivor space, " \
249 "otherwise SurvivorRatio is used to determine the size") \
250 \
251 experimental(bool, G1ParallelRSetUpdatingEnabled, false, \
252 "Enables the parallelization of remembered set updating " \
253 "during evacuation pauses") \
254 \
255 experimental(bool, G1ParallelRSetScanningEnabled, false, \
256 "Enables the parallelization of remembered set scanning " \
257 "during evacuation pauses") \
258 \
259 product(uintx, G1ParallelRSetThreads, 0, \
260 "If non-0 is the number of parallel rem set update threads, " \
261 "otherwise the value is determined ergonomically.")
263 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)
