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src/share/vm/gc_implementation/g1/g1_globals.hpp@0bfd3fb24150 (annotated)

src/share/vm/gc_implementation/g1/g1_globals.hpp

Tue, 13 Apr 2010 13:52:10 -0700

author

jmasa

date

Tue, 13 Apr 2010 13:52:10 -0700

changeset 1822

0bfd3fb24150

parent 1792

781e29eb8e08

child 1826

79e419e5ea3b

permissions

-rw-r--r--

6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
Summary: Ensure a full GC that clears SoftReferences before throwing an out-of-memory
Reviewed-by: ysr, jcoomes

ysr@777	1	/*
xdono@1014	2	* Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
ysr@777	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777	4	*
ysr@777	5	* This code is free software; you can redistribute it and/or modify it
ysr@777	6	* under the terms of the GNU General Public License version 2 only, as
ysr@777	7	* published by the Free Software Foundation.
ysr@777	8	*
ysr@777	9	* This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ysr@777	12	* version 2 for more details (a copy is included in the LICENSE file that
ysr@777	13	* accompanied this code).
ysr@777	14	*
ysr@777	15	* You should have received a copy of the GNU General Public License version
ysr@777	16	* 2 along with this work; if not, write to the Free Software Foundation,
ysr@777	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777	18	*
ysr@777	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777	20	* CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777	21	* have any questions.
ysr@777	22	*
ysr@777	23	*/
ysr@777	24
ysr@777	25	//
ysr@777	26	// Defines all globals flags used by the garbage-first compiler.
ysr@777	27	//
ysr@777	28
ysr@785	29	#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
ysr@777	30	\
johnc@1186	31	product(intx, G1ParallelGCAllocBufferSize, 8*K, \
ysr@777	32	"Size of parallel G1 allocation buffers in to-space.") \
ysr@777	33	\
johnc@1186	34	product(intx, G1ConfidencePercent, 50, \
ysr@777	35	"Confidence level for MMU/pause predictions") \
ysr@777	36	\
tonyp@1319	37	develop(intx, G1MarkingOverheadPercent, 0, \
ysr@777	38	"Overhead of concurrent marking") \
ysr@777	39	\
johnc@1186	40	develop(bool, G1Gen, true, \
ysr@777	41	"If true, it will enable the generational G1") \
ysr@777	42	\
johnc@1186	43	develop(intx, G1PolicyVerbose, 0, \
ysr@777	44	"The verbosity level on G1 policy decisions") \
ysr@777	45	\
ysr@777	46	develop(bool, G1UseHRIntoRS, true, \
ysr@777	47	"Determines whether the 'advanced' HR Into rem set is used.") \
ysr@777	48	\
ysr@777	49	develop(intx, G1MarkingVerboseLevel, 0, \
ysr@777	50	"Level (0-4) of verboseness of the marking code") \
ysr@777	51	\
tonyp@1479	52	develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1479	53	"Reachable object dump at the initial mark pause") \
tonyp@1479	54	\
tonyp@1479	55	develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1479	56	"If conc mark verification fails, dump reachable objects") \
tonyp@1479	57	\
tonyp@1479	58	develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1479	59	"The base file name for the reachable object dumps") \
ysr@777	60	\
ysr@777	61	develop(bool, G1TraceMarkStackOverflow, false, \
ysr@777	62	"If true, extra debugging code for CM restart for ovflw.") \
ysr@777	63	\
ysr@777	64	develop(intx, G1PausesBtwnConcMark, -1, \
ysr@777	65	"If positive, fixed number of pauses between conc markings") \
ysr@777	66	\
tonyp@1717	67	diagnostic(bool, G1SummarizeConcMark, false, \
ysr@777	68	"Summarize concurrent mark info") \
ysr@777	69	\
johnc@1186	70	diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@777	71	"Summarize remembered set processing info") \
ysr@777	72	\
tonyp@1319	73	diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@1319	74	"The period (in number of GCs) at which we will generate " \
tonyp@1319	75	"update buffer processing info " \
tonyp@1319	76	"(0 means do not periodically generate this info); " \
tonyp@1319	77	"it also requires -XX:+G1SummarizeRSetStats") \
tonyp@1319	78	\
johnc@1186	79	diagnostic(bool, G1SummarizeZFStats, false, \
ysr@777	80	"Summarize zero-filling info") \
ysr@777	81	\
tonyp@1717	82	diagnostic(bool, G1TraceConcRefinement, false, \
ysr@777	83	"Trace G1 concurrent refinement") \
ysr@777	84	\
johnc@1186	85	product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@777	86	"Size of the region stack for concurrent marking.") \
ysr@777	87	\
ysr@777	88	develop(bool, G1ConcZeroFill, true, \
ysr@777	89	"If true, run concurrent zero-filling thread") \
ysr@777	90	\
ysr@777	91	develop(intx, G1ConcZFMaxRegions, 1, \
ysr@777	92	"Stop zero-filling when # of zf'd regions reaches") \
ysr@777	93	\
ysr@777	94	develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@777	95	"If true, count frac of ptr writes with null pre-vals.") \
ysr@777	96	\
tonyp@1717	97	product(intx, G1SATBBufferSize, 1*K, \
ysr@777	98	"Number of entries in an SATB log buffer.") \
ysr@777	99	\
tonyp@1717	100	develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@777	101	"Number of completed buffers that triggers log processing.") \
ysr@777	102	\
ysr@777	103	develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@777	104	"If the young survival rate is S, and there's room left in " \
ysr@777	105	"to-space, we will allow regions whose survival rate is up to " \
ysr@777	106	"S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@777	107	\
ysr@777	108	develop(intx, G1InitYoungSurvRatio, 50, \
ysr@777	109	"Expected Survival Rate for newly allocated bytes") \
ysr@777	110	\
ysr@777	111	develop(bool, G1SATBPrintStubs, false, \
ysr@777	112	"If true, print generated stubs for the SATB barrier") \
ysr@777	113	\
tonyp@1717	114	experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@777	115	"When expanding, % of uncommitted space to claim.") \
ysr@777	116	\
ysr@777	117	develop(bool, G1RSBarrierRegionFilter, true, \
ysr@777	118	"If true, generate region filtering code in RS barrier") \
ysr@777	119	\
ysr@777	120	develop(bool, G1RSBarrierNullFilter, true, \
ysr@777	121	"If true, generate null-pointer filtering code in RS barrier") \
ysr@777	122	\
ysr@777	123	develop(bool, G1PrintCTFilterStats, false, \
ysr@777	124	"If true, print stats on RS filtering effectiveness") \
ysr@777	125	\
iveresov@1051	126	develop(bool, G1DeferredRSUpdate, true, \
iveresov@1051	127	"If true, use deferred RS updates") \
iveresov@1051	128	\
ysr@777	129	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	130	"If true, verify that no dirty cards remain after RS log " \
ysr@777	131	"processing.") \
ysr@777	132	\
ysr@777	133	develop(bool, G1RSCountHisto, false, \
ysr@777	134	"If true, print a histogram of RS occupancies after each pause") \
ysr@777	135	\
ysr@777	136	develop(intx, G1PrintRegionLivenessInfo, 0, \
ysr@777	137	"When > 0, print the occupancies of the <n> best and worst" \
ysr@777	138	"regions.") \
ysr@777	139	\
ysr@777	140	develop(bool, G1PrintParCleanupStats, false, \
ysr@777	141	"When true, print extra stats about parallel cleanup.") \
ysr@777	142	\
ysr@777	143	develop(bool, G1DisablePreBarrier, false, \
ysr@777	144	"Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@777	145	\
ysr@777	146	develop(bool, G1DisablePostBarrier, false, \
ysr@777	147	"Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@777	148	\
tonyp@1318	149	product(intx, G1UpdateBufferSize, 256, \
tonyp@1318	150	"Size of an update buffer") \
tonyp@1318	151	\
tonyp@1717	152	product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@1318	153	"Number of enqueued update buffers that will " \
iveresov@1546	154	"trigger concurrent processing. Will be selected ergonomically " \
iveresov@1546	155	"by default.") \
tonyp@1318	156	\
tonyp@1717	157	product(intx, G1ConcRefinementRedZone, 0, \
tonyp@1318	158	"Maximum number of enqueued update buffers before mutator " \
iveresov@1546	159	"threads start processing new ones instead of enqueueing them. " \
iveresov@1546	160	"Will be selected ergonomically by default. Zero will disable " \
iveresov@1546	161	"concurrent processing.") \
iveresov@1546	162	\
tonyp@1717	163	product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1546	164	"The number of update buffers that are left in the queue by the " \
iveresov@1546	165	"concurrent processing threads. Will be selected ergonomically " \
iveresov@1546	166	"by default.") \
iveresov@1546	167	\
tonyp@1717	168	product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1546	169	"The last concurrent refinement thread wakes up every " \
iveresov@1546	170	"specified number of milliseconds to do miscellaneous work.") \
iveresov@1546	171	\
tonyp@1717	172	product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1546	173	"Each time the rset update queue increases by this amount " \
iveresov@1546	174	"activate the next refinement thread if available. " \
iveresov@1546	175	"Will be selected ergonomically by default.") \
iveresov@1546	176	\
tonyp@1717	177	product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1546	178	"A target percentage of time that is allowed to be spend on " \
iveresov@1546	179	"process RS update buffers during the collection pause.") \
iveresov@1546	180	\
tonyp@1717	181	product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1546	182	"Select green, yellow and red zones adaptively to meet the " \
iveresov@1546	183	"the pause requirements.") \
ysr@777	184	\
ysr@777	185	develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@777	186	"Log base 2 of the length of conc RS hot-card cache.") \
ysr@777	187	\
johnc@1186	188	develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@777	189	"The threshold that defines (>=) a hot card.") \
ysr@777	190	\
ysr@777	191	develop(bool, G1PrintOopAppls, false, \
ysr@777	192	"When true, print applications of closures to external locs.") \
ysr@777	193	\
iveresov@1696	194	develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1696	195	"Max number of regions in a fine-grain table per MB.") \
iveresov@1696	196	\
iveresov@1696	197	product(intx, G1RSetRegionEntries, 0, \
iveresov@1696	198	"Max number of regions for which we keep bitmaps." \
iveresov@1696	199	"Will be set ergonomically by default") \
iveresov@1696	200	\
iveresov@1696	201	develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1696	202	"Max number of entries per region in a sparse table " \
iveresov@1696	203	"per MB.") \
iveresov@1696	204	\
iveresov@1696	205	product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1696	206	"Max number of entries per region in a sparse table." \
iveresov@1696	207	"Will be set ergonomically by default.") \
ysr@777	208	\
ysr@777	209	develop(bool, G1RecordHRRSOops, false, \
ysr@777	210	"When true, record recent calls to rem set operations.") \
ysr@777	211	\
ysr@777	212	develop(bool, G1RecordHRRSEvents, false, \
ysr@777	213	"When true, record recent calls to rem set operations.") \
ysr@777	214	\
ysr@777	215	develop(intx, G1MaxVerifyFailures, -1, \
ysr@777	216	"The maximum number of verification failrues to print. " \
ysr@777	217	"-1 means print all.") \
ysr@777	218	\
ysr@777	219	develop(bool, G1ScrubRemSets, true, \
ysr@777	220	"When true, do RS scrubbing after cleanup.") \
ysr@777	221	\
ysr@777	222	develop(bool, G1RSScrubVerbose, false, \
ysr@777	223	"When true, do RS scrubbing with verbose output.") \
ysr@777	224	\
ysr@777	225	develop(bool, G1YoungSurvRateVerbose, false, \
ysr@777	226	"print out the survival rate of young regions according to age.") \
ysr@777	227	\
ysr@777	228	develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@777	229	"the number of regions for which we'll print a surv rate " \
ysr@777	230	"summary.") \
ysr@777	231	\
tonyp@1717	232	develop(bool, G1UseScanOnlyPrefix, false, \
ysr@777	233	"It determines whether the system will calculate an optimum " \
ysr@777	234	"scan-only set.") \
ysr@777	235	\
tonyp@1717	236	product(intx, G1ReservePercent, 10, \
ysr@777	237	"It determines the minimum reserve we should have in the heap " \
ysr@777	238	"to minimize the probability of promotion failure.") \
ysr@777	239	\
tonyp@1717	240	diagnostic(bool, G1PrintHeapRegions, false, \
ysr@777	241	"If set G1 will print information on which regions are being " \
ysr@777	242	"allocated and which are reclaimed.") \
ysr@777	243	\
ysr@777	244	develop(bool, G1HRRSUseSparseTable, true, \
ysr@777	245	"When true, use sparse table to save space.") \
ysr@777	246	\
ysr@777	247	develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@777	248	"Forces flushing of log buffers before verification.") \
ysr@777	249	\
ysr@1522	250	develop(bool, G1FailOnFPError, false, \
ysr@1522	251	"When set, G1 will fail when it encounters an FP 'error', " \
ysr@1522	252	"so as to allow debugging") \
ysr@1522	253	\
johnc@1186	254	develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@980	255	"When set, G1 will not adjust the tenuring threshold") \
apetrusenko@980	256	\
johnc@1186	257	develop(bool, G1FixedEdenSize, false, \
apetrusenko@980	258	"When set, G1 will not allocate unused survivor space regions") \
apetrusenko@980	259	\
johnc@1186	260	develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@980	261	"If non-0 is the size of the G1 survivor space, " \
tonyp@1073	262	"otherwise SurvivorRatio is used to determine the size") \
tonyp@1073	263	\
tonyp@1717	264	product(bool, G1UseFixedWindowMMUTracker, false, \
ysr@1523	265	"If the MMU tracker's memory is full, forget the oldest entry") \
ysr@1523	266	\
tonyp@1377	267	product(uintx, G1HeapRegionSize, 0, \
tonyp@1377	268	"Size of the G1 regions.") \
tonyp@1377	269	\
tonyp@1792	270	experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@1073	271	"Enables the parallelization of remembered set updating " \
tonyp@1073	272	"during evacuation pauses") \
tonyp@1073	273	\
tonyp@1792	274	experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@1073	275	"Enables the parallelization of remembered set scanning " \
iveresov@1229	276	"during evacuation pauses") \
iveresov@1229	277	\
tonyp@1717	278	product(uintx, G1ConcRefinementThreads, 0, \
iveresov@1229	279	"If non-0 is the number of parallel rem set update threads, " \
johnc@1325	280	"otherwise the value is determined ergonomically.") \
johnc@1325	281	\
johnc@1325	282	develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@1325	283	"Expand the card count cache if the number of collisions for " \
apetrusenko@1375	284	"a particular entry exceeds this value.") \
apetrusenko@1375	285	\
apetrusenko@1375	286	develop(bool, G1VerifyCTCleanup, false, \
ysr@1629	287	"Verify card table cleanup.") \
ysr@1629	288	\
iveresov@1696	289	product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1696	290	"Size of a work unit of cards claimed by a worker thread" \
iveresov@1696	291	"during RSet scanning.") \
iveresov@1696	292	\
ysr@1629	293	develop(bool, ReduceInitialCardMarksForG1, false, \
ysr@1629	294	"When ReduceInitialCardMarks is true, this flag setting " \
ysr@1629	295	" controls whether G1 allows the RICM optimization")
ysr@777	296
ysr@785	297	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)