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src/share/vm/gc_implementation/g1/g1_globals.hpp@15c5903cf9e1 (annotated)

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

Mon, 03 Aug 2009 12:59:30 -0700

author

johnc

date

Mon, 03 Aug 2009 12:59:30 -0700

changeset 1324

15c5903cf9e1

parent 1319

83b687ce3090

child 1325

6cb8e9df7174

permissions

-rw-r--r--

6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, 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	\
johnc@1186	40	develop(bool, G1AccountConcurrentOverhead, false, \
ysr@777	41	"Whether soft real-time compliance in G1 will take into account" \
ysr@777	42	"concurrent overhead") \
ysr@777	43	\
ysr@777	44	product(intx, G1YoungGenSize, 0, \
ysr@777	45	"Size of the G1 young generation, 0 is the adaptive policy") \
ysr@777	46	\
johnc@1186	47	develop(bool, G1Gen, true, \
ysr@777	48	"If true, it will enable the generational G1") \
ysr@777	49	\
tonyp@1319	50	develop(intx, G1GCPercent, 10, \
ysr@777	51	"The desired percent time spent on GC") \
ysr@777	52	\
johnc@1186	53	develop(intx, G1PolicyVerbose, 0, \
ysr@777	54	"The verbosity level on G1 policy decisions") \
ysr@777	55	\
ysr@777	56	develop(bool, G1UseHRIntoRS, true, \
ysr@777	57	"Determines whether the 'advanced' HR Into rem set is used.") \
ysr@777	58	\
ysr@777	59	develop(intx, G1MarkingVerboseLevel, 0, \
ysr@777	60	"Level (0-4) of verboseness of the marking code") \
ysr@777	61	\
tonyp@1180	62	develop(bool, G1VerifyConcMarkPrintReachable, false, \
ysr@777	63	"If conc mark verification fails, print reachable objects") \
ysr@777	64	\
ysr@777	65	develop(bool, G1TraceMarkStackOverflow, false, \
ysr@777	66	"If true, extra debugging code for CM restart for ovflw.") \
ysr@777	67	\
ysr@777	68	develop(intx, G1PausesBtwnConcMark, -1, \
ysr@777	69	"If positive, fixed number of pauses between conc markings") \
ysr@777	70	\
johnc@1186	71	diagnostic(bool, G1SummarizeConcurrentMark, false, \
ysr@777	72	"Summarize concurrent mark info") \
ysr@777	73	\
johnc@1186	74	diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@777	75	"Summarize remembered set processing info") \
ysr@777	76	\
tonyp@1319	77	diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@1319	78	"The period (in number of GCs) at which we will generate " \
tonyp@1319	79	"update buffer processing info " \
tonyp@1319	80	"(0 means do not periodically generate this info); " \
tonyp@1319	81	"it also requires -XX:+G1SummarizeRSetStats") \
tonyp@1319	82	\
johnc@1186	83	diagnostic(bool, G1SummarizeZFStats, false, \
ysr@777	84	"Summarize zero-filling info") \
ysr@777	85	\
johnc@1186	86	develop(bool, G1TraceConcurrentRefinement, false, \
ysr@777	87	"Trace G1 concurrent refinement") \
ysr@777	88	\
johnc@1186	89	product(intx, G1MarkStackSize, 2 * 1024 * 1024, \
ysr@777	90	"Size of the mark stack for concurrent marking.") \
ysr@777	91	\
johnc@1186	92	product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@777	93	"Size of the region stack for concurrent marking.") \
ysr@777	94	\
ysr@777	95	develop(bool, G1ConcRefine, true, \
ysr@777	96	"If true, run concurrent rem set refinement for G1") \
ysr@777	97	\
ysr@777	98	develop(intx, G1ConcRefineTargTraversals, 4, \
ysr@777	99	"Number of concurrent refinement we try to achieve") \
ysr@777	100	\
ysr@777	101	develop(intx, G1ConcRefineInitialDelta, 4, \
ysr@777	102	"Number of heap regions of alloc ahead of starting collection " \
ysr@777	103	"pause to start concurrent refinement (initially)") \
ysr@777	104	\
johnc@1186	105	develop(bool, G1SmoothConcRefine, true, \
ysr@777	106	"Attempts to smooth out the overhead of concurrent refinement") \
ysr@777	107	\
ysr@777	108	develop(bool, G1ConcZeroFill, true, \
ysr@777	109	"If true, run concurrent zero-filling thread") \
ysr@777	110	\
ysr@777	111	develop(intx, G1ConcZFMaxRegions, 1, \
ysr@777	112	"Stop zero-filling when # of zf'd regions reaches") \
ysr@777	113	\
ysr@777	114	product(intx, G1SteadyStateUsed, 90, \
ysr@777	115	"If non-0, try to maintain 'used' at this pct (of max)") \
ysr@777	116	\
ysr@777	117	product(intx, G1SteadyStateUsedDelta, 30, \
ysr@777	118	"If G1SteadyStateUsed is non-0, then do pause this number of " \
ysr@777	119	"of percentage points earlier if no marking is in progress.") \
ysr@777	120	\
ysr@777	121	develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@777	122	"If true, count frac of ptr writes with null pre-vals.") \
ysr@777	123	\
ysr@777	124	product(intx, G1SATBLogBufferSize, 1*K, \
ysr@777	125	"Number of entries in an SATB log buffer.") \
ysr@777	126	\
ysr@777	127	product(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@777	128	"Number of completed buffers that triggers log processing.") \
ysr@777	129	\
ysr@777	130	develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@777	131	"If the young survival rate is S, and there's room left in " \
ysr@777	132	"to-space, we will allow regions whose survival rate is up to " \
ysr@777	133	"S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@777	134	\
ysr@777	135	develop(intx, G1InitYoungSurvRatio, 50, \
ysr@777	136	"Expected Survival Rate for newly allocated bytes") \
ysr@777	137	\
ysr@777	138	develop(bool, G1SATBPrintStubs, false, \
ysr@777	139	"If true, print generated stubs for the SATB barrier") \
ysr@777	140	\
johnc@1186	141	product(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@777	142	"When expanding, % of uncommitted space to claim.") \
ysr@777	143	\
ysr@777	144	develop(bool, G1RSBarrierRegionFilter, true, \
ysr@777	145	"If true, generate region filtering code in RS barrier") \
ysr@777	146	\
ysr@777	147	develop(bool, G1RSBarrierNullFilter, true, \
ysr@777	148	"If true, generate null-pointer filtering code in RS barrier") \
ysr@777	149	\
ysr@777	150	develop(bool, G1PrintCTFilterStats, false, \
ysr@777	151	"If true, print stats on RS filtering effectiveness") \
ysr@777	152	\
iveresov@1051	153	develop(bool, G1DeferredRSUpdate, true, \
iveresov@1051	154	"If true, use deferred RS updates") \
iveresov@1051	155	\
ysr@777	156	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	157	"If true, verify that no dirty cards remain after RS log " \
ysr@777	158	"processing.") \
ysr@777	159	\
ysr@777	160	develop(bool, G1RSCountHisto, false, \
ysr@777	161	"If true, print a histogram of RS occupancies after each pause") \
ysr@777	162	\
ysr@777	163	develop(intx, G1PrintRegionLivenessInfo, 0, \
ysr@777	164	"When > 0, print the occupancies of the <n> best and worst" \
ysr@777	165	"regions.") \
ysr@777	166	\
ysr@777	167	develop(bool, G1PrintParCleanupStats, false, \
ysr@777	168	"When true, print extra stats about parallel cleanup.") \
ysr@777	169	\
ysr@777	170	develop(bool, G1DisablePreBarrier, false, \
ysr@777	171	"Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@777	172	\
ysr@777	173	develop(bool, G1DisablePostBarrier, false, \
ysr@777	174	"Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@777	175	\
tonyp@1318	176	product(intx, G1UpdateBufferSize, 256, \
tonyp@1318	177	"Size of an update buffer") \
tonyp@1318	178	\
tonyp@1318	179	product(intx, G1UpdateBufferQueueProcessingThreshold, 5, \
tonyp@1318	180	"Number of enqueued update buffers that will " \
tonyp@1318	181	"trigger concurrent processing") \
tonyp@1318	182	\
tonyp@1318	183	product(intx, G1UpdateBufferQueueMaxLength, 30, \
tonyp@1318	184	"Maximum number of enqueued update buffers before mutator " \
tonyp@1318	185	"threads start processing new ones instead of enqueueing them") \
ysr@777	186	\
ysr@777	187	develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@777	188	"Log base 2 of the length of conc RS hot-card cache.") \
ysr@777	189	\
johnc@1186	190	develop(bool, G1ConcRSCountTraversals, false, \
ysr@777	191	"If true, gather data about the number of times CR traverses " \
ysr@777	192	"cards ") \
ysr@777	193	\
johnc@1186	194	develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@777	195	"The threshold that defines (>=) a hot card.") \
ysr@777	196	\
ysr@777	197	develop(bool, G1PrintOopAppls, false, \
ysr@777	198	"When true, print applications of closures to external locs.") \
ysr@777	199	\
johnc@1186	200	develop(intx, G1LogRSRegionEntries, 7, \
ysr@777	201	"Log_2 of max number of regions for which we keep bitmaps.") \
ysr@777	202	\
ysr@777	203	develop(bool, G1RecordHRRSOops, false, \
ysr@777	204	"When true, record recent calls to rem set operations.") \
ysr@777	205	\
ysr@777	206	develop(bool, G1RecordHRRSEvents, false, \
ysr@777	207	"When true, record recent calls to rem set operations.") \
ysr@777	208	\
ysr@777	209	develop(intx, G1MaxVerifyFailures, -1, \
ysr@777	210	"The maximum number of verification failrues to print. " \
ysr@777	211	"-1 means print all.") \
ysr@777	212	\
ysr@777	213	develop(bool, G1ScrubRemSets, true, \
ysr@777	214	"When true, do RS scrubbing after cleanup.") \
ysr@777	215	\
ysr@777	216	develop(bool, G1RSScrubVerbose, false, \
ysr@777	217	"When true, do RS scrubbing with verbose output.") \
ysr@777	218	\
ysr@777	219	develop(bool, G1YoungSurvRateVerbose, false, \
ysr@777	220	"print out the survival rate of young regions according to age.") \
ysr@777	221	\
ysr@777	222	develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@777	223	"the number of regions for which we'll print a surv rate " \
ysr@777	224	"summary.") \
ysr@777	225	\
ysr@777	226	product(bool, G1UseScanOnlyPrefix, false, \
ysr@777	227	"It determines whether the system will calculate an optimum " \
ysr@777	228	"scan-only set.") \
ysr@777	229	\
johnc@1186	230	product(intx, G1MinReservePercent, 10, \
ysr@777	231	"It determines the minimum reserve we should have in the heap " \
ysr@777	232	"to minimize the probability of promotion failure.") \
ysr@777	233	\
johnc@1186	234	diagnostic(bool, G1PrintRegions, false, \
ysr@777	235	"If set G1 will print information on which regions are being " \
ysr@777	236	"allocated and which are reclaimed.") \
ysr@777	237	\
ysr@777	238	develop(bool, G1HRRSUseSparseTable, true, \
ysr@777	239	"When true, use sparse table to save space.") \
ysr@777	240	\
ysr@777	241	develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@777	242	"Forces flushing of log buffers before verification.") \
ysr@777	243	\
johnc@1186	244	product(bool, G1UseSurvivorSpaces, true, \
apetrusenko@980	245	"When true, use survivor space.") \
apetrusenko@980	246	\
johnc@1186	247	develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@980	248	"When set, G1 will not adjust the tenuring threshold") \
apetrusenko@980	249	\
johnc@1186	250	develop(bool, G1FixedEdenSize, false, \
apetrusenko@980	251	"When set, G1 will not allocate unused survivor space regions") \
apetrusenko@980	252	\
johnc@1186	253	develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@980	254	"If non-0 is the size of the G1 survivor space, " \
tonyp@1073	255	"otherwise SurvivorRatio is used to determine the size") \
tonyp@1073	256	\
johnc@1186	257	experimental(bool, G1ParallelRSetUpdatingEnabled, false, \
tonyp@1073	258	"Enables the parallelization of remembered set updating " \
tonyp@1073	259	"during evacuation pauses") \
tonyp@1073	260	\
johnc@1186	261	experimental(bool, G1ParallelRSetScanningEnabled, false, \
tonyp@1073	262	"Enables the parallelization of remembered set scanning " \
iveresov@1229	263	"during evacuation pauses") \
iveresov@1229	264	\
iveresov@1229	265	product(uintx, G1ParallelRSetThreads, 0, \
iveresov@1229	266	"If non-0 is the number of parallel rem set update threads, " \
iveresov@1229	267	"otherwise the value is determined ergonomically.")
ysr@777	268
ysr@785	269	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)