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src/share/vm/gc_implementation/g1/g1_globals.hpp@4f93f0d00802
src/share/vm/gc_implementation/g1/g1_globals.hpp
Tue, 20 Sep 2011 09:59:59 -0400
- author
- tonyp
- date
- Tue, 20 Sep 2011 09:59:59 -0400
- changeset 3168
- 4f93f0d00802
- parent 3121
- 3bddbf0f57d6
- child 3184
- 246daf2c601d
- permissions
- -rw-r--r--
7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc
1 /*
2 * Copyright (c) 2001, 2011, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
28 #include "runtime/globals.hpp"
30 //
31 // Defines all globals flags used by the garbage-first compiler.
32 //
34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
35 \
36 product(intx, G1ConfidencePercent, 50, \
37 "Confidence level for MMU/pause predictions") \
38 \
39 develop(intx, G1MarkingOverheadPercent, 0, \
40 "Overhead of concurrent marking") \
41 \
42 \
43 develop(intx, G1PolicyVerbose, 0, \
44 "The verbosity level on G1 policy decisions") \
45 \
46 develop(intx, G1MarkingVerboseLevel, 0, \
47 "Level (0-4) of verboseness of the marking code") \
48 \
49 develop(bool, G1PrintReachableAtInitialMark, false, \
50 "Reachable object dump at the initial mark pause") \
51 \
52 develop(bool, G1VerifyDuringGCPrintReachable, false, \
53 "If conc mark verification fails, dump reachable objects") \
54 \
55 develop(ccstr, G1PrintReachableBaseFile, NULL, \
56 "The base file name for the reachable object dumps") \
57 \
58 develop(bool, G1TraceMarkStackOverflow, false, \
59 "If true, extra debugging code for CM restart for ovflw.") \
60 \
61 develop(intx, G1PausesBtwnConcMark, -1, \
62 "If positive, fixed number of pauses between conc markings") \
63 \
64 diagnostic(bool, G1SummarizeConcMark, false, \
65 "Summarize concurrent mark info") \
66 \
67 diagnostic(bool, G1SummarizeRSetStats, false, \
68 "Summarize remembered set processing info") \
69 \
70 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
71 "The period (in number of GCs) at which we will generate " \
72 "update buffer processing info " \
73 "(0 means do not periodically generate this info); " \
74 "it also requires -XX:+G1SummarizeRSetStats") \
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 product(double, G1ConcMarkStepDurationMillis, 10.0, \
83 "Target duration of individual concurrent marking steps " \
84 "in milliseconds.") \
85 \
86 product(intx, G1RefProcDrainInterval, 10, \
87 "The number of discovered reference objects to process before " \
88 "draining concurrent marking work queues.") \
89 \
90 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
91 "If true, enable reference discovery during concurrent " \
92 "marking and reference processing at the end of remark.") \
93 \
94 product(intx, G1SATBBufferSize, 1*K, \
95 "Number of entries in an SATB log buffer.") \
96 \
97 develop(intx, G1SATBProcessCompletedThreshold, 20, \
98 "Number of completed buffers that triggers log processing.") \
99 \
100 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
101 "Before enqueueing them, each mutator thread tries to do some " \
102 "filtering on the SATB buffers it generates. If post-filtering " \
103 "the percentage of retained entries is over this threshold " \
104 "the buffer will be enqueued for processing. A value of 0 " \
105 "specifies that mutator threads should not do such filtering.") \
106 \
107 develop(intx, G1ExtraRegionSurvRate, 33, \
108 "If the young survival rate is S, and there's room left in " \
109 "to-space, we will allow regions whose survival rate is up to " \
110 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
111 \
112 develop(intx, G1InitYoungSurvRatio, 50, \
113 "Expected Survival Rate for newly allocated bytes") \
114 \
115 develop(bool, G1SATBPrintStubs, false, \
116 "If true, print generated stubs for the SATB barrier") \
117 \
118 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
119 "When expanding, % of uncommitted space to claim.") \
120 \
121 develop(bool, G1RSBarrierRegionFilter, true, \
122 "If true, generate region filtering code in RS barrier") \
123 \
124 develop(bool, G1RSBarrierNullFilter, true, \
125 "If true, generate null-pointer filtering code in RS barrier") \
126 \
127 develop(bool, G1DeferredRSUpdate, true, \
128 "If true, use deferred RS updates") \
129 \
130 develop(bool, G1RSLogCheckCardTable, false, \
131 "If true, verify that no dirty cards remain after RS log " \
132 "processing.") \
133 \
134 develop(bool, G1RSCountHisto, false, \
135 "If true, print a histogram of RS occupancies after each pause") \
136 \
137 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
138 "Prints the liveness information for all regions in the heap " \
139 "at the end of a marking cycle.") \
140 \
141 develop(bool, G1PrintParCleanupStats, false, \
142 "When true, print extra stats about parallel cleanup.") \
143 \
144 product(intx, G1UpdateBufferSize, 256, \
145 "Size of an update buffer") \
146 \
147 product(intx, G1ConcRefinementYellowZone, 0, \
148 "Number of enqueued update buffers that will " \
149 "trigger concurrent processing. Will be selected ergonomically " \
150 "by default.") \
151 \
152 product(intx, G1ConcRefinementRedZone, 0, \
153 "Maximum number of enqueued update buffers before mutator " \
154 "threads start processing new ones instead of enqueueing them. " \
155 "Will be selected ergonomically by default. Zero will disable " \
156 "concurrent processing.") \
157 \
158 product(intx, G1ConcRefinementGreenZone, 0, \
159 "The number of update buffers that are left in the queue by the " \
160 "concurrent processing threads. Will be selected ergonomically " \
161 "by default.") \
162 \
163 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
164 "The last concurrent refinement thread wakes up every " \
165 "specified number of milliseconds to do miscellaneous work.") \
166 \
167 product(intx, G1ConcRefinementThresholdStep, 0, \
168 "Each time the rset update queue increases by this amount " \
169 "activate the next refinement thread if available. " \
170 "Will be selected ergonomically by default.") \
171 \
172 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
173 "A target percentage of time that is allowed to be spend on " \
174 "process RS update buffers during the collection pause.") \
175 \
176 product(bool, G1UseAdaptiveConcRefinement, true, \
177 "Select green, yellow and red zones adaptively to meet the " \
178 "the pause requirements.") \
179 \
180 develop(intx, G1ConcRSLogCacheSize, 10, \
181 "Log base 2 of the length of conc RS hot-card cache.") \
182 \
183 develop(intx, G1ConcRSHotCardLimit, 4, \
184 "The threshold that defines (>=) a hot card.") \
185 \
186 develop(intx, G1MaxHotCardCountSizePercent, 25, \
187 "The maximum size of the hot card count cache as a " \
188 "percentage of the number of cards for the maximum heap.") \
189 \
190 develop(bool, G1PrintOopAppls, false, \
191 "When true, print applications of closures to external locs.") \
192 \
193 develop(intx, G1RSetRegionEntriesBase, 256, \
194 "Max number of regions in a fine-grain table per MB.") \
195 \
196 product(intx, G1RSetRegionEntries, 0, \
197 "Max number of regions for which we keep bitmaps." \
198 "Will be set ergonomically by default") \
199 \
200 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
201 "Max number of entries per region in a sparse table " \
202 "per MB.") \
203 \
204 product(intx, G1RSetSparseRegionEntries, 0, \
205 "Max number of entries per region in a sparse table." \
206 "Will be set ergonomically by default.") \
207 \
208 develop(bool, G1RecordHRRSOops, false, \
209 "When true, record recent calls to rem set operations.") \
210 \
211 develop(bool, G1RecordHRRSEvents, false, \
212 "When true, record recent calls to rem set operations.") \
213 \
214 develop(intx, G1MaxVerifyFailures, -1, \
215 "The maximum number of verification failrues to print. " \
216 "-1 means print all.") \
217 \
218 develop(bool, G1ScrubRemSets, true, \
219 "When true, do RS scrubbing after cleanup.") \
220 \
221 develop(bool, G1RSScrubVerbose, false, \
222 "When true, do RS scrubbing with verbose output.") \
223 \
224 develop(bool, G1YoungSurvRateVerbose, false, \
225 "print out the survival rate of young regions according to age.") \
226 \
227 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
228 "the number of regions for which we'll print a surv rate " \
229 "summary.") \
230 \
231 product(uintx, G1ReservePercent, 10, \
232 "It determines the minimum reserve we should have in the heap " \
233 "to minimize the probability of promotion failure.") \
234 \
235 diagnostic(bool, G1PrintHeapRegions, false, \
236 "If set G1 will print information on which regions are being " \
237 "allocated and which are reclaimed.") \
238 \
239 develop(bool, G1HRRSUseSparseTable, true, \
240 "When true, use sparse table to save space.") \
241 \
242 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
243 "Forces flushing of log buffers before verification.") \
244 \
245 develop(bool, G1FailOnFPError, false, \
246 "When set, G1 will fail when it encounters an FP 'error', " \
247 "so as to allow debugging") \
248 \
249 product(uintx, G1HeapRegionSize, 0, \
250 "Size of the G1 regions.") \
251 \
252 experimental(bool, G1UseParallelRSetUpdating, true, \
253 "Enables the parallelization of remembered set updating " \
254 "during evacuation pauses") \
255 \
256 experimental(bool, G1UseParallelRSetScanning, true, \
257 "Enables the parallelization of remembered set scanning " \
258 "during evacuation pauses") \
259 \
260 product(uintx, G1ConcRefinementThreads, 0, \
261 "If non-0 is the number of parallel rem set update threads, " \
262 "otherwise the value is determined ergonomically.") \
263 \
264 develop(intx, G1CardCountCacheExpandThreshold, 16, \
265 "Expand the card count cache if the number of collisions for " \
266 "a particular entry exceeds this value.") \
267 \
268 develop(bool, G1VerifyCTCleanup, false, \
269 "Verify card table cleanup.") \
270 \
271 product(uintx, G1RSetScanBlockSize, 64, \
272 "Size of a work unit of cards claimed by a worker thread" \
273 "during RSet scanning.") \
274 \
275 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
276 "The number of regions we will add to the secondary free list " \
277 "at every append operation") \
278 \
279 develop(bool, G1ConcRegionFreeingVerbose, false, \
280 "Enables verboseness during concurrent region freeing") \
281 \
282 develop(bool, G1StressConcRegionFreeing, false, \
283 "It stresses the concurrent region freeing operation") \
284 \
285 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
286 "Artificial delay during concurrent region freeing") \
287 \
288 develop(uintx, G1DummyRegionsPerGC, 0, \
289 "The number of dummy regions G1 will allocate at the end of " \
290 "each evacuation pause in order to artificially fill up the " \
291 "heap and stress the marking implementation.") \
292 \
293 develop(bool, ReduceInitialCardMarksForG1, false, \
294 "When ReduceInitialCardMarks is true, this flag setting " \
295 " controls whether G1 allows the RICM optimization") \
296 \
297 develop(bool, G1ExitOnExpansionFailure, false, \
298 "Raise a fatal VM exit out of memory failure in the event " \
299 " that heap expansion fails due to running out of swap.") \
300 \
301 develop(uintx, G1ConcMarkForceOverflow, 0, \
302 "The number of times we'll force an overflow during " \
303 "concurrent marking")
305 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)
307 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
