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--- old/src/share/vm/gc_implementation/g1/g1_globals.hpp
+++ new/src/share/vm/gc_implementation/g1/g1_globals.hpp
1 1 /*
2 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
26 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
27 27
28 28 #include "runtime/globals.hpp"
29 29
30 30 //
31 31 // Defines all globals flags used by the garbage-first compiler.
32 32 //
33 33
34 34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
35 35 \
36 36 product(intx, G1ConfidencePercent, 50, \
37 37 "Confidence level for MMU/pause predictions") \
38 38 \
39 39 develop(intx, G1MarkingOverheadPercent, 0, \
40 40 "Overhead of concurrent marking") \
41 41 \
42 42 develop(bool, G1Gen, true, \
43 43 "If true, it will enable the generational G1") \
44 44 \
45 45 develop(intx, G1PolicyVerbose, 0, \
46 46 "The verbosity level on G1 policy decisions") \
47 47 \
48 48 develop(intx, G1MarkingVerboseLevel, 0, \
49 49 "Level (0-4) of verboseness of the marking code") \
50 50 \
51 51 develop(bool, G1PrintReachableAtInitialMark, false, \
52 52 "Reachable object dump at the initial mark pause") \
53 53 \
54 54 develop(bool, G1VerifyDuringGCPrintReachable, false, \
55 55 "If conc mark verification fails, dump reachable objects") \
56 56 \
57 57 develop(ccstr, G1PrintReachableBaseFile, NULL, \
58 58 "The base file name for the reachable object dumps") \
59 59 \
60 60 develop(bool, G1TraceMarkStackOverflow, false, \
61 61 "If true, extra debugging code for CM restart for ovflw.") \
62 62 \
63 63 develop(intx, G1PausesBtwnConcMark, -1, \
64 64 "If positive, fixed number of pauses between conc markings") \
65 65 \
66 66 diagnostic(bool, G1SummarizeConcMark, false, \
67 67 "Summarize concurrent mark info") \
68 68 \
69 69 diagnostic(bool, G1SummarizeRSetStats, false, \
70 70 "Summarize remembered set processing info") \
71 71 \
72 72 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
73 73 "The period (in number of GCs) at which we will generate " \
74 74 "update buffer processing info " \
75 75 "(0 means do not periodically generate this info); " \
76 76 "it also requires -XX:+G1SummarizeRSetStats") \
77 77 \
78 78 diagnostic(bool, G1TraceConcRefinement, false, \
79 79 "Trace G1 concurrent refinement") \
80 80 \
81 81 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
82 82 "Size of the region stack for concurrent marking.") \
83 83 \
84 84 product(double, G1ConcMarkStepDurationMillis, 10.0, \
85 85 "Target duration of individual concurrent marking steps " \
86 86 "in milliseconds.") \
87 87 \
88 88 product(intx, G1RefProcDrainInterval, 10, \
89 89 "The number of discovered reference objects to process before " \
90 90 "draining concurrent marking work queues.") \
91 91 \
92 92 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
93 93 "If true, count frac of ptr writes with null pre-vals.") \
94 94 \
95 95 product(intx, G1SATBBufferSize, 1*K, \
96 96 "Number of entries in an SATB log buffer.") \
97 97 \
98 98 develop(intx, G1SATBProcessCompletedThreshold, 20, \
99 99 "Number of completed buffers that triggers log processing.") \
100 100 \
101 101 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
102 102 "Before enqueueing them, each mutator thread tries to do some " \
103 103 "filtering on the SATB buffers it generates. If post-filtering " \
104 104 "the percentage of retained entries is over this threshold " \
105 105 "the buffer will be enqueued for processing. A value of 0 " \
106 106 "specifies that mutator threads should not do such filtering.") \
107 107 \
108 108 develop(intx, G1ExtraRegionSurvRate, 33, \
109 109 "If the young survival rate is S, and there's room left in " \
110 110 "to-space, we will allow regions whose survival rate is up to " \
111 111 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
112 112 \
113 113 develop(intx, G1InitYoungSurvRatio, 50, \
114 114 "Expected Survival Rate for newly allocated bytes") \
115 115 \
116 116 develop(bool, G1SATBPrintStubs, false, \
117 117 "If true, print generated stubs for the SATB barrier") \
118 118 \
119 119 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
120 120 "When expanding, % of uncommitted space to claim.") \
121 121 \
122 122 develop(bool, G1RSBarrierRegionFilter, true, \
123 123 "If true, generate region filtering code in RS barrier") \
124 124 \
125 125 develop(bool, G1RSBarrierNullFilter, true, \
126 126 "If true, generate null-pointer filtering code in RS barrier") \
127 127 \
128 128 develop(bool, G1PrintCTFilterStats, false, \
129 129 "If true, print stats on RS filtering effectiveness") \
130 130 \
131 131 develop(bool, G1DeferredRSUpdate, true, \
132 132 "If true, use deferred RS updates") \
133 133 \
134 134 develop(bool, G1RSLogCheckCardTable, false, \
135 135 "If true, verify that no dirty cards remain after RS log " \
136 136 "processing.") \
137 137 \
138 138 develop(bool, G1RSCountHisto, false, \
139 139 "If true, print a histogram of RS occupancies after each pause") \
140 140 \
141 141 develop(intx, G1PrintRegionLivenessInfo, 0, \
142 142 "When > 0, print the occupancies of the <n> best and worst" \
143 143 "regions.") \
144 144 \
145 145 develop(bool, G1PrintParCleanupStats, false, \
146 146 "When true, print extra stats about parallel cleanup.") \
147 147 \
148 148 develop(bool, G1DisablePreBarrier, false, \
149 149 "Disable generation of pre-barrier (i.e., marking barrier) ") \
150 150 \
151 151 develop(bool, G1DisablePostBarrier, false, \
152 152 "Disable generation of post-barrier (i.e., RS barrier) ") \
153 153 \
154 154 product(intx, G1UpdateBufferSize, 256, \
155 155 "Size of an update buffer") \
156 156 \
157 157 product(intx, G1ConcRefinementYellowZone, 0, \
158 158 "Number of enqueued update buffers that will " \
159 159 "trigger concurrent processing. Will be selected ergonomically " \
160 160 "by default.") \
161 161 \
162 162 product(intx, G1ConcRefinementRedZone, 0, \
163 163 "Maximum number of enqueued update buffers before mutator " \
164 164 "threads start processing new ones instead of enqueueing them. " \
165 165 "Will be selected ergonomically by default. Zero will disable " \
166 166 "concurrent processing.") \
167 167 \
168 168 product(intx, G1ConcRefinementGreenZone, 0, \
169 169 "The number of update buffers that are left in the queue by the " \
170 170 "concurrent processing threads. Will be selected ergonomically " \
171 171 "by default.") \
172 172 \
173 173 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
174 174 "The last concurrent refinement thread wakes up every " \
175 175 "specified number of milliseconds to do miscellaneous work.") \
176 176 \
177 177 product(intx, G1ConcRefinementThresholdStep, 0, \
178 178 "Each time the rset update queue increases by this amount " \
179 179 "activate the next refinement thread if available. " \
180 180 "Will be selected ergonomically by default.") \
181 181 \
182 182 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
183 183 "A target percentage of time that is allowed to be spend on " \
184 184 "process RS update buffers during the collection pause.") \
185 185 \
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186 186 product(bool, G1UseAdaptiveConcRefinement, true, \
187 187 "Select green, yellow and red zones adaptively to meet the " \
188 188 "the pause requirements.") \
189 189 \
190 190 develop(intx, G1ConcRSLogCacheSize, 10, \
191 191 "Log base 2 of the length of conc RS hot-card cache.") \
192 192 \
193 193 develop(intx, G1ConcRSHotCardLimit, 4, \
194 194 "The threshold that defines (>=) a hot card.") \
195 195 \
196 + develop(intx, G1MaxHotCardCountSizePercent, 50, \
197 + "The maximum size of the hot card count cache as a " \
198 + "percentage of the number of cards for the maximum heap.") \
199 + \
196 200 develop(bool, G1PrintOopAppls, false, \
197 201 "When true, print applications of closures to external locs.") \
198 202 \
199 203 develop(intx, G1RSetRegionEntriesBase, 256, \
200 204 "Max number of regions in a fine-grain table per MB.") \
201 205 \
202 206 product(intx, G1RSetRegionEntries, 0, \
203 207 "Max number of regions for which we keep bitmaps." \
204 208 "Will be set ergonomically by default") \
205 209 \
206 210 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
207 211 "Max number of entries per region in a sparse table " \
208 212 "per MB.") \
209 213 \
210 214 product(intx, G1RSetSparseRegionEntries, 0, \
211 215 "Max number of entries per region in a sparse table." \
212 216 "Will be set ergonomically by default.") \
213 217 \
214 218 develop(bool, G1RecordHRRSOops, false, \
215 219 "When true, record recent calls to rem set operations.") \
216 220 \
217 221 develop(bool, G1RecordHRRSEvents, false, \
218 222 "When true, record recent calls to rem set operations.") \
219 223 \
220 224 develop(intx, G1MaxVerifyFailures, -1, \
221 225 "The maximum number of verification failrues to print. " \
222 226 "-1 means print all.") \
223 227 \
224 228 develop(bool, G1ScrubRemSets, true, \
225 229 "When true, do RS scrubbing after cleanup.") \
226 230 \
227 231 develop(bool, G1RSScrubVerbose, false, \
228 232 "When true, do RS scrubbing with verbose output.") \
229 233 \
230 234 develop(bool, G1YoungSurvRateVerbose, false, \
231 235 "print out the survival rate of young regions according to age.") \
232 236 \
233 237 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
234 238 "the number of regions for which we'll print a surv rate " \
235 239 "summary.") \
236 240 \
237 241 product(intx, G1ReservePercent, 10, \
238 242 "It determines the minimum reserve we should have in the heap " \
239 243 "to minimize the probability of promotion failure.") \
240 244 \
241 245 diagnostic(bool, G1PrintHeapRegions, false, \
242 246 "If set G1 will print information on which regions are being " \
243 247 "allocated and which are reclaimed.") \
244 248 \
245 249 develop(bool, G1HRRSUseSparseTable, true, \
246 250 "When true, use sparse table to save space.") \
247 251 \
248 252 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
249 253 "Forces flushing of log buffers before verification.") \
250 254 \
251 255 develop(bool, G1FailOnFPError, false, \
252 256 "When set, G1 will fail when it encounters an FP 'error', " \
253 257 "so as to allow debugging") \
254 258 \
255 259 develop(bool, G1FixedTenuringThreshold, false, \
256 260 "When set, G1 will not adjust the tenuring threshold") \
257 261 \
258 262 develop(bool, G1FixedEdenSize, false, \
259 263 "When set, G1 will not allocate unused survivor space regions") \
260 264 \
261 265 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
262 266 "If non-0 is the size of the G1 survivor space, " \
263 267 "otherwise SurvivorRatio is used to determine the size") \
264 268 \
265 269 product(uintx, G1HeapRegionSize, 0, \
266 270 "Size of the G1 regions.") \
267 271 \
268 272 experimental(bool, G1UseParallelRSetUpdating, true, \
269 273 "Enables the parallelization of remembered set updating " \
270 274 "during evacuation pauses") \
271 275 \
272 276 experimental(bool, G1UseParallelRSetScanning, true, \
273 277 "Enables the parallelization of remembered set scanning " \
274 278 "during evacuation pauses") \
275 279 \
276 280 product(uintx, G1ConcRefinementThreads, 0, \
277 281 "If non-0 is the number of parallel rem set update threads, " \
278 282 "otherwise the value is determined ergonomically.") \
279 283 \
280 284 develop(intx, G1CardCountCacheExpandThreshold, 16, \
281 285 "Expand the card count cache if the number of collisions for " \
282 286 "a particular entry exceeds this value.") \
283 287 \
284 288 develop(bool, G1VerifyCTCleanup, false, \
285 289 "Verify card table cleanup.") \
286 290 \
287 291 product(uintx, G1RSetScanBlockSize, 64, \
288 292 "Size of a work unit of cards claimed by a worker thread" \
289 293 "during RSet scanning.") \
290 294 \
291 295 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
292 296 "The number of regions we will add to the secondary free list " \
293 297 "at every append operation") \
294 298 \
295 299 develop(bool, G1ConcRegionFreeingVerbose, false, \
296 300 "Enables verboseness during concurrent region freeing") \
297 301 \
298 302 develop(bool, G1StressConcRegionFreeing, false, \
299 303 "It stresses the concurrent region freeing operation") \
300 304 \
301 305 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
302 306 "Artificial delay during concurrent region freeing") \
303 307 \
304 308 develop(bool, ReduceInitialCardMarksForG1, false, \
305 309 "When ReduceInitialCardMarks is true, this flag setting " \
306 310 " controls whether G1 allows the RICM optimization") \
307 311 \
308 312 develop(bool, G1ExitOnExpansionFailure, false, \
309 313 "Raise a fatal VM exit out of memory failure in the event " \
310 314 " that heap expansion fails due to running out of swap.")
311 315
312 316 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)
313 317
314 318 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
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