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src/share/vm/gc_implementation/g1/g1_globals.hpp@8a5ea0a9ccc4
src/share/vm/gc_implementation/g1/g1_globals.hpp
Sat, 06 Oct 2012 01:17:44 -0700
- author
- johnc
- date
- Sat, 06 Oct 2012 01:17:44 -0700
- changeset 4173
- 8a5ea0a9ccc4
- parent 4016
- c9814fadeb38
- child 4385
- 37f7535e5f18
- permissions
- -rw-r--r--
7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
1 /*
2 * Copyright (c) 2001, 2012, 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
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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"
29 //
30 // Defines all globals flags used by the garbage-first compiler.
31 //
33 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
34 \
35 product(intx, G1ConfidencePercent, 50, \
36 "Confidence level for MMU/pause predictions") \
37 \
38 develop(intx, G1MarkingOverheadPercent, 0, \
39 "Overhead of concurrent marking") \
40 \
41 develop(intx, G1MarkingVerboseLevel, 0, \
42 "Level (0-4) of verboseness of the marking code") \
43 \
44 develop(bool, G1PrintReachableAtInitialMark, false, \
45 "Reachable object dump at the initial mark pause") \
46 \
47 develop(bool, G1VerifyDuringGCPrintReachable, false, \
48 "If conc mark verification fails, dump reachable objects") \
49 \
50 develop(ccstr, G1PrintReachableBaseFile, NULL, \
51 "The base file name for the reachable object dumps") \
52 \
53 develop(bool, G1TraceMarkStackOverflow, false, \
54 "If true, extra debugging code for CM restart for ovflw.") \
55 \
56 develop(bool, G1TraceHeapRegionRememberedSet, false, \
57 "Enables heap region remembered set debug logs") \
58 \
59 diagnostic(bool, G1SummarizeConcMark, false, \
60 "Summarize concurrent mark info") \
61 \
62 diagnostic(bool, G1SummarizeRSetStats, false, \
63 "Summarize remembered set processing info") \
64 \
65 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
66 "The period (in number of GCs) at which we will generate " \
67 "update buffer processing info " \
68 "(0 means do not periodically generate this info); " \
69 "it also requires -XX:+G1SummarizeRSetStats") \
70 \
71 diagnostic(bool, G1TraceConcRefinement, false, \
72 "Trace G1 concurrent refinement") \
73 \
74 product(double, G1ConcMarkStepDurationMillis, 10.0, \
75 "Target duration of individual concurrent marking steps " \
76 "in milliseconds.") \
77 \
78 product(intx, G1RefProcDrainInterval, 10, \
79 "The number of discovered reference objects to process before " \
80 "draining concurrent marking work queues.") \
81 \
82 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
83 "If true, enable reference discovery during concurrent " \
84 "marking and reference processing at the end of remark.") \
85 \
86 product(intx, G1SATBBufferSize, 1*K, \
87 "Number of entries in an SATB log buffer.") \
88 \
89 develop(intx, G1SATBProcessCompletedThreshold, 20, \
90 "Number of completed buffers that triggers log processing.") \
91 \
92 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
93 "Before enqueueing them, each mutator thread tries to do some " \
94 "filtering on the SATB buffers it generates. If post-filtering " \
95 "the percentage of retained entries is over this threshold " \
96 "the buffer will be enqueued for processing. A value of 0 " \
97 "specifies that mutator threads should not do such filtering.") \
98 \
99 develop(intx, G1ExtraRegionSurvRate, 33, \
100 "If the young survival rate is S, and there's room left in " \
101 "to-space, we will allow regions whose survival rate is up to " \
102 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
103 \
104 develop(intx, G1InitYoungSurvRatio, 50, \
105 "Expected Survival Rate for newly allocated bytes") \
106 \
107 develop(bool, G1SATBPrintStubs, false, \
108 "If true, print generated stubs for the SATB barrier") \
109 \
110 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
111 "When expanding, % of uncommitted space to claim.") \
112 \
113 develop(bool, G1RSBarrierRegionFilter, true, \
114 "If true, generate region filtering code in RS barrier") \
115 \
116 develop(bool, G1RSBarrierNullFilter, true, \
117 "If true, generate null-pointer filtering code in RS barrier") \
118 \
119 develop(bool, G1DeferredRSUpdate, true, \
120 "If true, use deferred RS updates") \
121 \
122 develop(bool, G1RSLogCheckCardTable, false, \
123 "If true, verify that no dirty cards remain after RS log " \
124 "processing.") \
125 \
126 develop(bool, G1RSCountHisto, false, \
127 "If true, print a histogram of RS occupancies after each pause") \
128 \
129 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
130 "Prints the liveness information for all regions in the heap " \
131 "at the end of a marking cycle.") \
132 \
133 product(intx, G1UpdateBufferSize, 256, \
134 "Size of an update buffer") \
135 \
136 product(intx, G1ConcRefinementYellowZone, 0, \
137 "Number of enqueued update buffers that will " \
138 "trigger concurrent processing. Will be selected ergonomically " \
139 "by default.") \
140 \
141 product(intx, G1ConcRefinementRedZone, 0, \
142 "Maximum number of enqueued update buffers before mutator " \
143 "threads start processing new ones instead of enqueueing them. " \
144 "Will be selected ergonomically by default. Zero will disable " \
145 "concurrent processing.") \
146 \
147 product(intx, G1ConcRefinementGreenZone, 0, \
148 "The number of update buffers that are left in the queue by the " \
149 "concurrent processing threads. Will be selected ergonomically " \
150 "by default.") \
151 \
152 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
153 "The last concurrent refinement thread wakes up every " \
154 "specified number of milliseconds to do miscellaneous work.") \
155 \
156 product(intx, G1ConcRefinementThresholdStep, 0, \
157 "Each time the rset update queue increases by this amount " \
158 "activate the next refinement thread if available. " \
159 "Will be selected ergonomically by default.") \
160 \
161 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
162 "A target percentage of time that is allowed to be spend on " \
163 "process RS update buffers during the collection pause.") \
164 \
165 product(bool, G1UseAdaptiveConcRefinement, true, \
166 "Select green, yellow and red zones adaptively to meet the " \
167 "the pause requirements.") \
168 \
169 develop(intx, G1ConcRSLogCacheSize, 10, \
170 "Log base 2 of the length of conc RS hot-card cache.") \
171 \
172 develop(intx, G1ConcRSHotCardLimit, 4, \
173 "The threshold that defines (>=) a hot card.") \
174 \
175 develop(intx, G1MaxHotCardCountSizePercent, 25, \
176 "The maximum size of the hot card count cache as a " \
177 "percentage of the number of cards for the maximum heap.") \
178 \
179 develop(bool, G1PrintOopAppls, false, \
180 "When true, print applications of closures to external locs.") \
181 \
182 develop(intx, G1RSetRegionEntriesBase, 256, \
183 "Max number of regions in a fine-grain table per MB.") \
184 \
185 product(intx, G1RSetRegionEntries, 0, \
186 "Max number of regions for which we keep bitmaps." \
187 "Will be set ergonomically by default") \
188 \
189 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
190 "Max number of entries per region in a sparse table " \
191 "per MB.") \
192 \
193 product(intx, G1RSetSparseRegionEntries, 0, \
194 "Max number of entries per region in a sparse table." \
195 "Will be set ergonomically by default.") \
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(uintx, G1ReservePercent, 10, \
221 "It determines the minimum reserve we should have in the heap " \
222 "to minimize the probability of promotion failure.") \
223 \
224 diagnostic(bool, G1PrintHeapRegions, false, \
225 "If set G1 will print information on which regions are being " \
226 "allocated and which are reclaimed.") \
227 \
228 develop(bool, G1HRRSUseSparseTable, true, \
229 "When true, use sparse table to save space.") \
230 \
231 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
232 "Forces flushing of log buffers before verification.") \
233 \
234 develop(bool, G1FailOnFPError, false, \
235 "When set, G1 will fail when it encounters an FP 'error', " \
236 "so as to allow debugging") \
237 \
238 product(uintx, G1HeapRegionSize, 0, \
239 "Size of the G1 regions.") \
240 \
241 experimental(bool, G1UseParallelRSetUpdating, true, \
242 "Enables the parallelization of remembered set updating " \
243 "during evacuation pauses") \
244 \
245 experimental(bool, G1UseParallelRSetScanning, true, \
246 "Enables the parallelization of remembered set scanning " \
247 "during evacuation pauses") \
248 \
249 product(uintx, G1ConcRefinementThreads, 0, \
250 "If non-0 is the number of parallel rem set update threads, " \
251 "otherwise the value is determined ergonomically.") \
252 \
253 develop(intx, G1CardCountCacheExpandThreshold, 16, \
254 "Expand the card count cache if the number of collisions for " \
255 "a particular entry exceeds this value.") \
256 \
257 develop(bool, G1VerifyCTCleanup, false, \
258 "Verify card table cleanup.") \
259 \
260 product(uintx, G1RSetScanBlockSize, 64, \
261 "Size of a work unit of cards claimed by a worker thread" \
262 "during RSet scanning.") \
263 \
264 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
265 "The number of regions we will add to the secondary free list " \
266 "at every append operation") \
267 \
268 develop(bool, G1ConcRegionFreeingVerbose, false, \
269 "Enables verboseness during concurrent region freeing") \
270 \
271 develop(bool, G1StressConcRegionFreeing, false, \
272 "It stresses the concurrent region freeing operation") \
273 \
274 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
275 "Artificial delay during concurrent region freeing") \
276 \
277 develop(uintx, G1DummyRegionsPerGC, 0, \
278 "The number of dummy regions G1 will allocate at the end of " \
279 "each evacuation pause in order to artificially fill up the " \
280 "heap and stress the marking implementation.") \
281 \
282 develop(bool, G1ExitOnExpansionFailure, false, \
283 "Raise a fatal VM exit out of memory failure in the event " \
284 " that heap expansion fails due to running out of swap.") \
285 \
286 develop(uintx, G1ConcMarkForceOverflow, 0, \
287 "The number of times we'll force an overflow during " \
288 "concurrent marking") \
289 \
290 experimental(uintx, G1DefaultMinNewGenPercent, 20, \
291 "Percentage (0-100) of the heap size to use as minimum " \
292 "young gen size.") \
293 \
294 experimental(uintx, G1DefaultMaxNewGenPercent, 80, \
295 "Percentage (0-100) of the heap size to use as maximum " \
296 "young gen size.") \
297 \
298 experimental(uintx, G1OldCSetRegionLiveThresholdPercent, 90, \
299 "Threshold for regions to be added to the collection set. " \
300 "Regions with more live bytes than this will not be collected.") \
301 \
302 product(uintx, G1HeapWastePercent, 5, \
303 "Amount of space, expressed as a percentage of the heap size, " \
304 "that G1 is willing not to collect to avoid expensive GCs.") \
305 \
306 product(uintx, G1MixedGCCountTarget, 4, \
307 "The target number of mixed GCs after a marking cycle.") \
308 \
309 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
310 "An upper bound for the number of old CSet regions expressed " \
311 "as a percentage of the heap size.") \
312 \
313 experimental(ccstr, G1LogLevel, NULL, \
314 "Log level for G1 logging: fine, finer, finest") \
315 \
316 notproduct(bool, G1EvacuationFailureALot, false, \
317 "Force use of evacuation failure handling during certain " \
318 "evacuation pauses") \
319 \
320 develop(uintx, G1EvacuationFailureALotCount, 1000, \
321 "Number of successful evacuations between evacuation failures " \
322 "occurring at object copying") \
323 \
324 develop(uintx, G1EvacuationFailureALotInterval, 5, \
325 "Total collections between forced triggering of evacuation " \
326 "failures") \
327 \
328 develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
329 "Force use of evacuation failure handling during evacuation " \
330 "pauses when marking is in progress") \
331 \
332 develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
333 "Force use of evacuation failure handling during initial mark " \
334 "evacuation pauses") \
335 \
336 develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
337 "Force use of evacuation failure handling during young " \
338 "evacuation pauses") \
339 \
340 develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
341 "Force use of evacuation failure handling during mixed " \
342 "evacuation pauses")
344 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)
346 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
