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src/share/vm/gc_implementation/g1/g1_globals.hpp@34fb2662f6c2 (annotated)

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

Tue, 26 Jan 2010 16:52:29 -0800

author

ysr

date

Tue, 26 Jan 2010 16:52:29 -0800

changeset 1629

34fb2662f6c2

parent 1546

44f61c24ddab

child 1696

0414c1049f15

permissions

-rw-r--r--

6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
Summary: G1 now answers "no" to the query can_elide_initializing_store_barrier() in the product build. A debug flag allows alternate behaviour in debug builds.
Reviewed-by: iveresov, tonyp

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	\
tonyp@1377	40	product(uintx, G1YoungGenSize, 0, \
ysr@777	41	"Size of the G1 young generation, 0 is the adaptive policy") \
ysr@777	42	\
johnc@1186	43	develop(bool, G1Gen, true, \
ysr@777	44	"If true, it will enable the generational G1") \
ysr@777	45	\
tonyp@1319	46	develop(intx, G1GCPercent, 10, \
ysr@777	47	"The desired percent time spent on GC") \
ysr@777	48	\
johnc@1186	49	develop(intx, G1PolicyVerbose, 0, \
ysr@777	50	"The verbosity level on G1 policy decisions") \
ysr@777	51	\
ysr@777	52	develop(bool, G1UseHRIntoRS, true, \
ysr@777	53	"Determines whether the 'advanced' HR Into rem set is used.") \
ysr@777	54	\
ysr@777	55	develop(intx, G1MarkingVerboseLevel, 0, \
ysr@777	56	"Level (0-4) of verboseness of the marking code") \
ysr@777	57	\
tonyp@1479	58	develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1479	59	"Reachable object dump at the initial mark pause") \
tonyp@1479	60	\
tonyp@1479	61	develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1479	62	"If conc mark verification fails, dump reachable objects") \
tonyp@1479	63	\
tonyp@1479	64	develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1479	65	"The base file name for the reachable object dumps") \
ysr@777	66	\
ysr@777	67	develop(bool, G1TraceMarkStackOverflow, false, \
ysr@777	68	"If true, extra debugging code for CM restart for ovflw.") \
ysr@777	69	\
ysr@777	70	develop(intx, G1PausesBtwnConcMark, -1, \
ysr@777	71	"If positive, fixed number of pauses between conc markings") \
ysr@777	72	\
johnc@1186	73	diagnostic(bool, G1SummarizeConcurrentMark, false, \
ysr@777	74	"Summarize concurrent mark info") \
ysr@777	75	\
johnc@1186	76	diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@777	77	"Summarize remembered set processing info") \
ysr@777	78	\
tonyp@1319	79	diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@1319	80	"The period (in number of GCs) at which we will generate " \
tonyp@1319	81	"update buffer processing info " \
tonyp@1319	82	"(0 means do not periodically generate this info); " \
tonyp@1319	83	"it also requires -XX:+G1SummarizeRSetStats") \
tonyp@1319	84	\
johnc@1186	85	diagnostic(bool, G1SummarizeZFStats, false, \
ysr@777	86	"Summarize zero-filling info") \
ysr@777	87	\
iveresov@1546	88	diagnostic(bool, G1TraceConcurrentRefinement, false, \
ysr@777	89	"Trace G1 concurrent refinement") \
ysr@777	90	\
johnc@1186	91	product(intx, G1MarkStackSize, 2 * 1024 * 1024, \
ysr@777	92	"Size of the mark stack for concurrent marking.") \
ysr@777	93	\
johnc@1186	94	product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@777	95	"Size of the region stack for concurrent marking.") \
ysr@777	96	\
ysr@777	97	develop(bool, G1ConcZeroFill, true, \
ysr@777	98	"If true, run concurrent zero-filling thread") \
ysr@777	99	\
ysr@777	100	develop(intx, G1ConcZFMaxRegions, 1, \
ysr@777	101	"Stop zero-filling when # of zf'd regions reaches") \
ysr@777	102	\
ysr@777	103	product(intx, G1SteadyStateUsed, 90, \
ysr@777	104	"If non-0, try to maintain 'used' at this pct (of max)") \
ysr@777	105	\
ysr@777	106	product(intx, G1SteadyStateUsedDelta, 30, \
ysr@777	107	"If G1SteadyStateUsed is non-0, then do pause this number of " \
ysr@777	108	"of percentage points earlier if no marking is in progress.") \
ysr@777	109	\
ysr@777	110	develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@777	111	"If true, count frac of ptr writes with null pre-vals.") \
ysr@777	112	\
ysr@777	113	product(intx, G1SATBLogBufferSize, 1*K, \
ysr@777	114	"Number of entries in an SATB log buffer.") \
ysr@777	115	\
ysr@777	116	product(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@777	117	"Number of completed buffers that triggers log processing.") \
ysr@777	118	\
ysr@777	119	develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@777	120	"If the young survival rate is S, and there's room left in " \
ysr@777	121	"to-space, we will allow regions whose survival rate is up to " \
ysr@777	122	"S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@777	123	\
ysr@777	124	develop(intx, G1InitYoungSurvRatio, 50, \
ysr@777	125	"Expected Survival Rate for newly allocated bytes") \
ysr@777	126	\
ysr@777	127	develop(bool, G1SATBPrintStubs, false, \
ysr@777	128	"If true, print generated stubs for the SATB barrier") \
ysr@777	129	\
johnc@1186	130	product(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@777	131	"When expanding, % of uncommitted space to claim.") \
ysr@777	132	\
ysr@777	133	develop(bool, G1RSBarrierRegionFilter, true, \
ysr@777	134	"If true, generate region filtering code in RS barrier") \
ysr@777	135	\
ysr@777	136	develop(bool, G1RSBarrierNullFilter, true, \
ysr@777	137	"If true, generate null-pointer filtering code in RS barrier") \
ysr@777	138	\
ysr@777	139	develop(bool, G1PrintCTFilterStats, false, \
ysr@777	140	"If true, print stats on RS filtering effectiveness") \
ysr@777	141	\
iveresov@1051	142	develop(bool, G1DeferredRSUpdate, true, \
iveresov@1051	143	"If true, use deferred RS updates") \
iveresov@1051	144	\
ysr@777	145	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	146	"If true, verify that no dirty cards remain after RS log " \
ysr@777	147	"processing.") \
ysr@777	148	\
ysr@777	149	develop(bool, G1RSCountHisto, false, \
ysr@777	150	"If true, print a histogram of RS occupancies after each pause") \
ysr@777	151	\
ysr@777	152	develop(intx, G1PrintRegionLivenessInfo, 0, \
ysr@777	153	"When > 0, print the occupancies of the <n> best and worst" \
ysr@777	154	"regions.") \
ysr@777	155	\
ysr@777	156	develop(bool, G1PrintParCleanupStats, false, \
ysr@777	157	"When true, print extra stats about parallel cleanup.") \
ysr@777	158	\
ysr@777	159	develop(bool, G1DisablePreBarrier, false, \
ysr@777	160	"Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@777	161	\
ysr@777	162	develop(bool, G1DisablePostBarrier, false, \
ysr@777	163	"Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@777	164	\
tonyp@1318	165	product(intx, G1UpdateBufferSize, 256, \
tonyp@1318	166	"Size of an update buffer") \
tonyp@1318	167	\
iveresov@1546	168	product(intx, G1ConcRefineYellowZone, 0, \
tonyp@1318	169	"Number of enqueued update buffers that will " \
iveresov@1546	170	"trigger concurrent processing. Will be selected ergonomically " \
iveresov@1546	171	"by default.") \
tonyp@1318	172	\
iveresov@1546	173	product(intx, G1ConcRefineRedZone, 0, \
tonyp@1318	174	"Maximum number of enqueued update buffers before mutator " \
iveresov@1546	175	"threads start processing new ones instead of enqueueing them. " \
iveresov@1546	176	"Will be selected ergonomically by default. Zero will disable " \
iveresov@1546	177	"concurrent processing.") \
iveresov@1546	178	\
iveresov@1546	179	product(intx, G1ConcRefineGreenZone, 0, \
iveresov@1546	180	"The number of update buffers that are left in the queue by the " \
iveresov@1546	181	"concurrent processing threads. Will be selected ergonomically " \
iveresov@1546	182	"by default.") \
iveresov@1546	183	\
iveresov@1546	184	product(intx, G1ConcRefineServiceInterval, 300, \
iveresov@1546	185	"The last concurrent refinement thread wakes up every " \
iveresov@1546	186	"specified number of milliseconds to do miscellaneous work.") \
iveresov@1546	187	\
iveresov@1546	188	product(intx, G1ConcRefineThresholdStep, 0, \
iveresov@1546	189	"Each time the rset update queue increases by this amount " \
iveresov@1546	190	"activate the next refinement thread if available. " \
iveresov@1546	191	"Will be selected ergonomically by default.") \
iveresov@1546	192	\
iveresov@1546	193	product(intx, G1RSUpdatePauseFractionPercent, 10, \
iveresov@1546	194	"A target percentage of time that is allowed to be spend on " \
iveresov@1546	195	"process RS update buffers during the collection pause.") \
iveresov@1546	196	\
iveresov@1546	197	product(bool, G1AdaptiveConcRefine, true, \
iveresov@1546	198	"Select green, yellow and red zones adaptively to meet the " \
iveresov@1546	199	"the pause requirements.") \
ysr@777	200	\
ysr@777	201	develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@777	202	"Log base 2 of the length of conc RS hot-card cache.") \
ysr@777	203	\
johnc@1186	204	develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@777	205	"The threshold that defines (>=) a hot card.") \
ysr@777	206	\
ysr@777	207	develop(bool, G1PrintOopAppls, false, \
ysr@777	208	"When true, print applications of closures to external locs.") \
ysr@777	209	\
johnc@1186	210	develop(intx, G1LogRSRegionEntries, 7, \
ysr@777	211	"Log_2 of max number of regions for which we keep bitmaps.") \
ysr@777	212	\
ysr@777	213	develop(bool, G1RecordHRRSOops, false, \
ysr@777	214	"When true, record recent calls to rem set operations.") \
ysr@777	215	\
ysr@777	216	develop(bool, G1RecordHRRSEvents, false, \
ysr@777	217	"When true, record recent calls to rem set operations.") \
ysr@777	218	\
ysr@777	219	develop(intx, G1MaxVerifyFailures, -1, \
ysr@777	220	"The maximum number of verification failrues to print. " \
ysr@777	221	"-1 means print all.") \
ysr@777	222	\
ysr@777	223	develop(bool, G1ScrubRemSets, true, \
ysr@777	224	"When true, do RS scrubbing after cleanup.") \
ysr@777	225	\
ysr@777	226	develop(bool, G1RSScrubVerbose, false, \
ysr@777	227	"When true, do RS scrubbing with verbose output.") \
ysr@777	228	\
ysr@777	229	develop(bool, G1YoungSurvRateVerbose, false, \
ysr@777	230	"print out the survival rate of young regions according to age.") \
ysr@777	231	\
ysr@777	232	develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@777	233	"the number of regions for which we'll print a surv rate " \
ysr@777	234	"summary.") \
ysr@777	235	\
ysr@777	236	product(bool, G1UseScanOnlyPrefix, false, \
ysr@777	237	"It determines whether the system will calculate an optimum " \
ysr@777	238	"scan-only set.") \
ysr@777	239	\
johnc@1186	240	product(intx, G1MinReservePercent, 10, \
ysr@777	241	"It determines the minimum reserve we should have in the heap " \
ysr@777	242	"to minimize the probability of promotion failure.") \
ysr@777	243	\
johnc@1186	244	diagnostic(bool, G1PrintRegions, false, \
ysr@777	245	"If set G1 will print information on which regions are being " \
ysr@777	246	"allocated and which are reclaimed.") \
ysr@777	247	\
ysr@777	248	develop(bool, G1HRRSUseSparseTable, true, \
ysr@777	249	"When true, use sparse table to save space.") \
ysr@777	250	\
ysr@777	251	develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@777	252	"Forces flushing of log buffers before verification.") \
ysr@777	253	\
johnc@1186	254	product(bool, G1UseSurvivorSpaces, true, \
apetrusenko@980	255	"When true, use survivor space.") \
apetrusenko@980	256	\
ysr@1522	257	develop(bool, G1FailOnFPError, false, \
ysr@1522	258	"When set, G1 will fail when it encounters an FP 'error', " \
ysr@1522	259	"so as to allow debugging") \
ysr@1522	260	\
johnc@1186	261	develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@980	262	"When set, G1 will not adjust the tenuring threshold") \
apetrusenko@980	263	\
johnc@1186	264	develop(bool, G1FixedEdenSize, false, \
apetrusenko@980	265	"When set, G1 will not allocate unused survivor space regions") \
apetrusenko@980	266	\
johnc@1186	267	develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@980	268	"If non-0 is the size of the G1 survivor space, " \
tonyp@1073	269	"otherwise SurvivorRatio is used to determine the size") \
tonyp@1073	270	\
ysr@1523	271	product(bool, G1ForgetfulMMUTracker, false, \
ysr@1523	272	"If the MMU tracker's memory is full, forget the oldest entry") \
ysr@1523	273	\
tonyp@1377	274	product(uintx, G1HeapRegionSize, 0, \
tonyp@1377	275	"Size of the G1 regions.") \
tonyp@1377	276	\
johnc@1186	277	experimental(bool, G1ParallelRSetUpdatingEnabled, false, \
tonyp@1073	278	"Enables the parallelization of remembered set updating " \
tonyp@1073	279	"during evacuation pauses") \
tonyp@1073	280	\
johnc@1186	281	experimental(bool, G1ParallelRSetScanningEnabled, false, \
tonyp@1073	282	"Enables the parallelization of remembered set scanning " \
iveresov@1229	283	"during evacuation pauses") \
iveresov@1229	284	\
iveresov@1229	285	product(uintx, G1ParallelRSetThreads, 0, \
iveresov@1229	286	"If non-0 is the number of parallel rem set update threads, " \
johnc@1325	287	"otherwise the value is determined ergonomically.") \
johnc@1325	288	\
johnc@1325	289	develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@1325	290	"Expand the card count cache if the number of collisions for " \
apetrusenko@1375	291	"a particular entry exceeds this value.") \
apetrusenko@1375	292	\
apetrusenko@1375	293	develop(bool, G1VerifyCTCleanup, false, \
ysr@1629	294	"Verify card table cleanup.") \
ysr@1629	295	\
ysr@1629	296	develop(bool, ReduceInitialCardMarksForG1, false, \
ysr@1629	297	"When ReduceInitialCardMarks is true, this flag setting " \
ysr@1629	298	" controls whether G1 allows the RICM optimization")
ysr@777	299
ysr@785	300	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)