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src/share/vm/gc_implementation/g1/g1_globals.hpp@6270f80a7331
src/share/vm/gc_implementation/g1/g1_globals.hpp
Wed, 30 Sep 2009 14:50:51 -0400
- author
- tonyp
- date
- Wed, 30 Sep 2009 14:50:51 -0400
- changeset 1479
- 6270f80a7331
- parent 1377
- 2c79770d1f6e
- child 1522
- 23b9a8d315fc
- permissions
- -rw-r--r--
6890137: G1: revamp reachable object dump
Summary: Revamp the reachable object dump debugging facility.
Reviewed-by: jmasa, apetrusenko
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 product(uintx, G1YoungGenSize, 0, \
41 "Size of the G1 young generation, 0 is the adaptive policy") \
42 \
43 develop(bool, G1Gen, true, \
44 "If true, it will enable the generational G1") \
45 \
46 develop(intx, G1GCPercent, 10, \
47 "The desired percent time spent on GC") \
48 \
49 develop(intx, G1PolicyVerbose, 0, \
50 "The verbosity level on G1 policy decisions") \
51 \
52 develop(bool, G1UseHRIntoRS, true, \
53 "Determines whether the 'advanced' HR Into rem set is used.") \
54 \
55 develop(intx, G1MarkingVerboseLevel, 0, \
56 "Level (0-4) of verboseness of the marking code") \
57 \
58 develop(bool, G1PrintReachableAtInitialMark, false, \
59 "Reachable object dump at the initial mark pause") \
60 \
61 develop(bool, G1VerifyDuringGCPrintReachable, false, \
62 "If conc mark verification fails, dump reachable objects") \
63 \
64 develop(ccstr, G1PrintReachableBaseFile, NULL, \
65 "The base file name for the reachable object dumps") \
66 \
67 develop(bool, G1TraceMarkStackOverflow, false, \
68 "If true, extra debugging code for CM restart for ovflw.") \
69 \
70 develop(intx, G1PausesBtwnConcMark, -1, \
71 "If positive, fixed number of pauses between conc markings") \
72 \
73 diagnostic(bool, G1SummarizeConcurrentMark, false, \
74 "Summarize concurrent mark info") \
75 \
76 diagnostic(bool, G1SummarizeRSetStats, false, \
77 "Summarize remembered set processing info") \
78 \
79 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
80 "The period (in number of GCs) at which we will generate " \
81 "update buffer processing info " \
82 "(0 means do not periodically generate this info); " \
83 "it also requires -XX:+G1SummarizeRSetStats") \
84 \
85 diagnostic(bool, G1SummarizeZFStats, false, \
86 "Summarize zero-filling info") \
87 \
88 develop(bool, G1TraceConcurrentRefinement, false, \
89 "Trace G1 concurrent refinement") \
90 \
91 product(intx, G1MarkStackSize, 2 * 1024 * 1024, \
92 "Size of the mark stack for concurrent marking.") \
93 \
94 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
95 "Size of the region stack for concurrent marking.") \
96 \
97 develop(bool, G1ConcRefine, true, \
98 "If true, run concurrent rem set refinement for G1") \
99 \
100 develop(intx, G1ConcRefineTargTraversals, 4, \
101 "Number of concurrent refinement we try to achieve") \
102 \
103 develop(intx, G1ConcRefineInitialDelta, 4, \
104 "Number of heap regions of alloc ahead of starting collection " \
105 "pause to start concurrent refinement (initially)") \
106 \
107 develop(bool, G1SmoothConcRefine, true, \
108 "Attempts to smooth out the overhead of concurrent refinement") \
109 \
110 develop(bool, G1ConcZeroFill, true, \
111 "If true, run concurrent zero-filling thread") \
112 \
113 develop(intx, G1ConcZFMaxRegions, 1, \
114 "Stop zero-filling when # of zf'd regions reaches") \
115 \
116 product(intx, G1SteadyStateUsed, 90, \
117 "If non-0, try to maintain 'used' at this pct (of max)") \
118 \
119 product(intx, G1SteadyStateUsedDelta, 30, \
120 "If G1SteadyStateUsed is non-0, then do pause this number of " \
121 "of percentage points earlier if no marking is in progress.") \
122 \
123 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
124 "If true, count frac of ptr writes with null pre-vals.") \
125 \
126 product(intx, G1SATBLogBufferSize, 1*K, \
127 "Number of entries in an SATB log buffer.") \
128 \
129 product(intx, G1SATBProcessCompletedThreshold, 20, \
130 "Number of completed buffers that triggers log processing.") \
131 \
132 develop(intx, G1ExtraRegionSurvRate, 33, \
133 "If the young survival rate is S, and there's room left in " \
134 "to-space, we will allow regions whose survival rate is up to " \
135 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
136 \
137 develop(intx, G1InitYoungSurvRatio, 50, \
138 "Expected Survival Rate for newly allocated bytes") \
139 \
140 develop(bool, G1SATBPrintStubs, false, \
141 "If true, print generated stubs for the SATB barrier") \
142 \
143 product(intx, G1ExpandByPercentOfAvailable, 20, \
144 "When expanding, % of uncommitted space to claim.") \
145 \
146 develop(bool, G1RSBarrierRegionFilter, true, \
147 "If true, generate region filtering code in RS barrier") \
148 \
149 develop(bool, G1RSBarrierNullFilter, true, \
150 "If true, generate null-pointer filtering code in RS barrier") \
151 \
152 develop(bool, G1PrintCTFilterStats, false, \
153 "If true, print stats on RS filtering effectiveness") \
154 \
155 develop(bool, G1DeferredRSUpdate, true, \
156 "If true, use deferred RS updates") \
157 \
158 develop(bool, G1RSLogCheckCardTable, false, \
159 "If true, verify that no dirty cards remain after RS log " \
160 "processing.") \
161 \
162 develop(bool, G1RSCountHisto, false, \
163 "If true, print a histogram of RS occupancies after each pause") \
164 \
165 develop(intx, G1PrintRegionLivenessInfo, 0, \
166 "When > 0, print the occupancies of the <n> best and worst" \
167 "regions.") \
168 \
169 develop(bool, G1PrintParCleanupStats, false, \
170 "When true, print extra stats about parallel cleanup.") \
171 \
172 develop(bool, G1DisablePreBarrier, false, \
173 "Disable generation of pre-barrier (i.e., marking barrier) ") \
174 \
175 develop(bool, G1DisablePostBarrier, false, \
176 "Disable generation of post-barrier (i.e., RS barrier) ") \
177 \
178 product(intx, G1UpdateBufferSize, 256, \
179 "Size of an update buffer") \
180 \
181 product(intx, G1UpdateBufferQueueProcessingThreshold, 5, \
182 "Number of enqueued update buffers that will " \
183 "trigger concurrent processing") \
184 \
185 product(intx, G1UpdateBufferQueueMaxLength, 30, \
186 "Maximum number of enqueued update buffers before mutator " \
187 "threads start processing new ones instead of enqueueing them") \
188 \
189 develop(intx, G1ConcRSLogCacheSize, 10, \
190 "Log base 2 of the length of conc RS hot-card cache.") \
191 \
192 develop(intx, G1ConcRSHotCardLimit, 4, \
193 "The threshold that defines (>=) a hot card.") \
194 \
195 develop(bool, G1PrintOopAppls, false, \
196 "When true, print applications of closures to external locs.") \
197 \
198 develop(intx, G1LogRSRegionEntries, 7, \
199 "Log_2 of max number of regions for which we keep bitmaps.") \
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 \
224 product(bool, G1UseScanOnlyPrefix, false, \
225 "It determines whether the system will calculate an optimum " \
226 "scan-only set.") \
227 \
228 product(intx, G1MinReservePercent, 10, \
229 "It determines the minimum reserve we should have in the heap " \
230 "to minimize the probability of promotion failure.") \
231 \
232 diagnostic(bool, G1PrintRegions, false, \
233 "If set G1 will print information on which regions are being " \
234 "allocated and which are reclaimed.") \
235 \
236 develop(bool, G1HRRSUseSparseTable, true, \
237 "When true, use sparse table to save space.") \
238 \
239 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
240 "Forces flushing of log buffers before verification.") \
241 \
242 product(bool, G1UseSurvivorSpaces, true, \
243 "When true, use survivor space.") \
244 \
245 develop(bool, G1FixedTenuringThreshold, false, \
246 "When set, G1 will not adjust the tenuring threshold") \
247 \
248 develop(bool, G1FixedEdenSize, false, \
249 "When set, G1 will not allocate unused survivor space regions") \
250 \
251 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
252 "If non-0 is the size of the G1 survivor space, " \
253 "otherwise SurvivorRatio is used to determine the size") \
254 \
255 product(uintx, G1HeapRegionSize, 0, \
256 "Size of the G1 regions.") \
257 \
258 experimental(bool, G1ParallelRSetUpdatingEnabled, false, \
259 "Enables the parallelization of remembered set updating " \
260 "during evacuation pauses") \
261 \
262 experimental(bool, G1ParallelRSetScanningEnabled, false, \
263 "Enables the parallelization of remembered set scanning " \
264 "during evacuation pauses") \
265 \
266 product(uintx, G1ParallelRSetThreads, 0, \
267 "If non-0 is the number of parallel rem set update threads, " \
268 "otherwise the value is determined ergonomically.") \
269 \
270 develop(intx, G1CardCountCacheExpandThreshold, 16, \
271 "Expand the card count cache if the number of collisions for " \
272 "a particular entry exceeds this value.") \
273 \
274 develop(bool, G1VerifyCTCleanup, false, \
275 "Verify card table cleanup.")
277 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)
