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src/share/vm/gc_implementation/g1/g1_globals.hpp@df6caf649ff7 (annotated)

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

Tue, 14 Jul 2009 15:40:39 -0700

author

ysr

date

Tue, 14 Jul 2009 15:40:39 -0700

changeset 1280

df6caf649ff7

parent 1229

315a5d70b295

child 1318

27f6a9b9c311

permissions

-rw-r--r--

6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, 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	\
johnc@1186	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	\
johnc@1186	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	\
johnc@1186	77	diagnostic(bool, G1SummarizeZFStats, false, \
ysr@777	78	"Summarize zero-filling info") \
ysr@777	79	\
johnc@1186	80	develop(bool, G1TraceConcurrentRefinement, false, \
ysr@777	81	"Trace G1 concurrent refinement") \
ysr@777	82	\
johnc@1186	83	product(intx, G1MarkStackSize, 2 * 1024 * 1024, \
ysr@777	84	"Size of the mark stack for concurrent marking.") \
ysr@777	85	\
johnc@1186	86	product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@777	87	"Size of the region stack for concurrent marking.") \
ysr@777	88	\
ysr@777	89	develop(bool, G1ConcRefine, true, \
ysr@777	90	"If true, run concurrent rem set refinement for G1") \
ysr@777	91	\
ysr@777	92	develop(intx, G1ConcRefineTargTraversals, 4, \
ysr@777	93	"Number of concurrent refinement we try to achieve") \
ysr@777	94	\
ysr@777	95	develop(intx, G1ConcRefineInitialDelta, 4, \
ysr@777	96	"Number of heap regions of alloc ahead of starting collection " \
ysr@777	97	"pause to start concurrent refinement (initially)") \
ysr@777	98	\
johnc@1186	99	develop(bool, G1SmoothConcRefine, true, \
ysr@777	100	"Attempts to smooth out the overhead of concurrent refinement") \
ysr@777	101	\
ysr@777	102	develop(bool, G1ConcZeroFill, true, \
ysr@777	103	"If true, run concurrent zero-filling thread") \
ysr@777	104	\
ysr@777	105	develop(intx, G1ConcZFMaxRegions, 1, \
ysr@777	106	"Stop zero-filling when # of zf'd regions reaches") \
ysr@777	107	\
ysr@777	108	product(intx, G1SteadyStateUsed, 90, \
ysr@777	109	"If non-0, try to maintain 'used' at this pct (of max)") \
ysr@777	110	\
ysr@777	111	product(intx, G1SteadyStateUsedDelta, 30, \
ysr@777	112	"If G1SteadyStateUsed is non-0, then do pause this number of " \
ysr@777	113	"of percentage points earlier if no marking is in progress.") \
ysr@777	114	\
ysr@777	115	develop(bool, G1SATBBarrierPrintNullPreVals, false, \
ysr@777	116	"If true, count frac of ptr writes with null pre-vals.") \
ysr@777	117	\
ysr@777	118	product(intx, G1SATBLogBufferSize, 1*K, \
ysr@777	119	"Number of entries in an SATB log buffer.") \
ysr@777	120	\
ysr@777	121	product(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@777	122	"Number of completed buffers that triggers log processing.") \
ysr@777	123	\
ysr@777	124	develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@777	125	"If the young survival rate is S, and there's room left in " \
ysr@777	126	"to-space, we will allow regions whose survival rate is up to " \
ysr@777	127	"S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@777	128	\
ysr@777	129	develop(intx, G1InitYoungSurvRatio, 50, \
ysr@777	130	"Expected Survival Rate for newly allocated bytes") \
ysr@777	131	\
ysr@777	132	develop(bool, G1SATBPrintStubs, false, \
ysr@777	133	"If true, print generated stubs for the SATB barrier") \
ysr@777	134	\
johnc@1186	135	product(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@777	136	"When expanding, % of uncommitted space to claim.") \
ysr@777	137	\
ysr@777	138	develop(bool, G1RSBarrierRegionFilter, true, \
ysr@777	139	"If true, generate region filtering code in RS barrier") \
ysr@777	140	\
ysr@777	141	develop(bool, G1RSBarrierNullFilter, true, \
ysr@777	142	"If true, generate null-pointer filtering code in RS barrier") \
ysr@777	143	\
ysr@777	144	develop(bool, G1PrintCTFilterStats, false, \
ysr@777	145	"If true, print stats on RS filtering effectiveness") \
ysr@777	146	\
iveresov@1051	147	develop(bool, G1DeferredRSUpdate, true, \
iveresov@1051	148	"If true, use deferred RS updates") \
iveresov@1051	149	\
ysr@777	150	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	151	"If true, verify that no dirty cards remain after RS log " \
ysr@777	152	"processing.") \
ysr@777	153	\
ysr@777	154	develop(bool, G1RSCountHisto, false, \
ysr@777	155	"If true, print a histogram of RS occupancies after each pause") \
ysr@777	156	\
ysr@777	157	develop(intx, G1PrintRegionLivenessInfo, 0, \
ysr@777	158	"When > 0, print the occupancies of the <n> best and worst" \
ysr@777	159	"regions.") \
ysr@777	160	\
ysr@777	161	develop(bool, G1PrintParCleanupStats, false, \
ysr@777	162	"When true, print extra stats about parallel cleanup.") \
ysr@777	163	\
ysr@777	164	develop(bool, G1DisablePreBarrier, false, \
ysr@777	165	"Disable generation of pre-barrier (i.e., marking barrier) ") \
ysr@777	166	\
ysr@777	167	develop(bool, G1DisablePostBarrier, false, \
ysr@777	168	"Disable generation of post-barrier (i.e., RS barrier) ") \
ysr@777	169	\
ysr@777	170	product(intx, G1DirtyCardQueueMax, 30, \
ysr@777	171	"Maximum number of completed RS buffers before mutator threads " \
ysr@777	172	"start processing them.") \
ysr@777	173	\
ysr@777	174	develop(intx, G1ConcRSLogCacheSize, 10, \
ysr@777	175	"Log base 2 of the length of conc RS hot-card cache.") \
ysr@777	176	\
johnc@1186	177	develop(bool, G1ConcRSCountTraversals, false, \
ysr@777	178	"If true, gather data about the number of times CR traverses " \
ysr@777	179	"cards ") \
ysr@777	180	\
johnc@1186	181	develop(intx, G1ConcRSHotCardLimit, 4, \
ysr@777	182	"The threshold that defines (>=) a hot card.") \
ysr@777	183	\
ysr@777	184	develop(bool, G1PrintOopAppls, false, \
ysr@777	185	"When true, print applications of closures to external locs.") \
ysr@777	186	\
johnc@1186	187	develop(intx, G1LogRSRegionEntries, 7, \
ysr@777	188	"Log_2 of max number of regions for which we keep bitmaps.") \
ysr@777	189	\
ysr@777	190	develop(bool, G1RecordHRRSOops, false, \
ysr@777	191	"When true, record recent calls to rem set operations.") \
ysr@777	192	\
ysr@777	193	develop(bool, G1RecordHRRSEvents, false, \
ysr@777	194	"When true, record recent calls to rem set operations.") \
ysr@777	195	\
ysr@777	196	develop(intx, G1MaxVerifyFailures, -1, \
ysr@777	197	"The maximum number of verification failrues to print. " \
ysr@777	198	"-1 means print all.") \
ysr@777	199	\
ysr@777	200	develop(bool, G1ScrubRemSets, true, \
ysr@777	201	"When true, do RS scrubbing after cleanup.") \
ysr@777	202	\
ysr@777	203	develop(bool, G1RSScrubVerbose, false, \
ysr@777	204	"When true, do RS scrubbing with verbose output.") \
ysr@777	205	\
ysr@777	206	develop(bool, G1YoungSurvRateVerbose, false, \
ysr@777	207	"print out the survival rate of young regions according to age.") \
ysr@777	208	\
ysr@777	209	develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@777	210	"the number of regions for which we'll print a surv rate " \
ysr@777	211	"summary.") \
ysr@777	212	\
ysr@777	213	product(bool, G1UseScanOnlyPrefix, false, \
ysr@777	214	"It determines whether the system will calculate an optimum " \
ysr@777	215	"scan-only set.") \
ysr@777	216	\
johnc@1186	217	product(intx, G1MinReservePercent, 10, \
ysr@777	218	"It determines the minimum reserve we should have in the heap " \
ysr@777	219	"to minimize the probability of promotion failure.") \
ysr@777	220	\
johnc@1186	221	diagnostic(bool, G1PrintRegions, false, \
ysr@777	222	"If set G1 will print information on which regions are being " \
ysr@777	223	"allocated and which are reclaimed.") \
ysr@777	224	\
ysr@777	225	develop(bool, G1HRRSUseSparseTable, true, \
ysr@777	226	"When true, use sparse table to save space.") \
ysr@777	227	\
ysr@777	228	develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@777	229	"Forces flushing of log buffers before verification.") \
ysr@777	230	\
johnc@1186	231	product(bool, G1UseSurvivorSpaces, true, \
apetrusenko@980	232	"When true, use survivor space.") \
apetrusenko@980	233	\
johnc@1186	234	develop(bool, G1FixedTenuringThreshold, false, \
apetrusenko@980	235	"When set, G1 will not adjust the tenuring threshold") \
apetrusenko@980	236	\
johnc@1186	237	develop(bool, G1FixedEdenSize, false, \
apetrusenko@980	238	"When set, G1 will not allocate unused survivor space regions") \
apetrusenko@980	239	\
johnc@1186	240	develop(uintx, G1FixedSurvivorSpaceSize, 0, \
apetrusenko@980	241	"If non-0 is the size of the G1 survivor space, " \
tonyp@1073	242	"otherwise SurvivorRatio is used to determine the size") \
tonyp@1073	243	\
johnc@1186	244	experimental(bool, G1ParallelRSetUpdatingEnabled, false, \
tonyp@1073	245	"Enables the parallelization of remembered set updating " \
tonyp@1073	246	"during evacuation pauses") \
tonyp@1073	247	\
johnc@1186	248	experimental(bool, G1ParallelRSetScanningEnabled, false, \
tonyp@1073	249	"Enables the parallelization of remembered set scanning " \
iveresov@1229	250	"during evacuation pauses") \
iveresov@1229	251	\
iveresov@1229	252	product(uintx, G1ParallelRSetThreads, 0, \
iveresov@1229	253	"If non-0 is the number of parallel rem set update threads, " \
iveresov@1229	254	"otherwise the value is determined ergonomically.")
ysr@777	255
ysr@785	256	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)