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src/share/vm/gc_implementation/g1/g1_globals.hpp@cd8e33b2a8ad (annotated)

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

Fri, 29 Apr 2011 12:40:49 -0400

author

tonyp

date

Fri, 29 Apr 2011 12:40:49 -0400

changeset 2848

cd8e33b2a8ad

parent 2817

49a67202bc67

child 3065

ff53346271fe

permissions

-rw-r--r--

7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
Summary: We were calling STS join and leave during a STW pause and we are not suppoesed to. I now only call those during concurrent phase. I also added stress code in the non-product builds to force an overflows (the condition that ws uncovering the bug) to make sure it does not happen again.
Reviewed-by: johnc, brutisso

ysr@777	1	/*
tonyp@2469	2	* Copyright (c) 2001, 2011, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
ysr@777	22	*
ysr@777	23	*/
ysr@777	24
stefank@2314	25	#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
stefank@2314	26	#define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
stefank@2314	27
stefank@2314	28	#include "runtime/globals.hpp"
stefank@2314	29
ysr@777	30	//
ysr@777	31	// Defines all globals flags used by the garbage-first compiler.
ysr@777	32	//
ysr@777	33
ysr@785	34	#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
ysr@777	35	\
johnc@1186	36	product(intx, G1ConfidencePercent, 50, \
ysr@777	37	"Confidence level for MMU/pause predictions") \
ysr@777	38	\
tonyp@1319	39	develop(intx, G1MarkingOverheadPercent, 0, \
ysr@777	40	"Overhead of concurrent marking") \
ysr@777	41	\
johnc@1186	42	develop(bool, G1Gen, true, \
ysr@777	43	"If true, it will enable the generational G1") \
ysr@777	44	\
johnc@1186	45	develop(intx, G1PolicyVerbose, 0, \
ysr@777	46	"The verbosity level on G1 policy decisions") \
ysr@777	47	\
ysr@777	48	develop(intx, G1MarkingVerboseLevel, 0, \
ysr@777	49	"Level (0-4) of verboseness of the marking code") \
ysr@777	50	\
tonyp@1479	51	develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1479	52	"Reachable object dump at the initial mark pause") \
tonyp@1479	53	\
tonyp@1479	54	develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1479	55	"If conc mark verification fails, dump reachable objects") \
tonyp@1479	56	\
tonyp@1479	57	develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1479	58	"The base file name for the reachable object dumps") \
ysr@777	59	\
ysr@777	60	develop(bool, G1TraceMarkStackOverflow, false, \
ysr@777	61	"If true, extra debugging code for CM restart for ovflw.") \
ysr@777	62	\
ysr@777	63	develop(intx, G1PausesBtwnConcMark, -1, \
ysr@777	64	"If positive, fixed number of pauses between conc markings") \
ysr@777	65	\
tonyp@1717	66	diagnostic(bool, G1SummarizeConcMark, false, \
ysr@777	67	"Summarize concurrent mark info") \
ysr@777	68	\
johnc@1186	69	diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@777	70	"Summarize remembered set processing info") \
ysr@777	71	\
tonyp@1319	72	diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@1319	73	"The period (in number of GCs) at which we will generate " \
tonyp@1319	74	"update buffer processing info " \
tonyp@1319	75	"(0 means do not periodically generate this info); " \
tonyp@1319	76	"it also requires -XX:+G1SummarizeRSetStats") \
tonyp@1319	77	\
tonyp@1717	78	diagnostic(bool, G1TraceConcRefinement, false, \
ysr@777	79	"Trace G1 concurrent refinement") \
ysr@777	80	\
johnc@1186	81	product(intx, G1MarkRegionStackSize, 1024 * 1024, \
ysr@777	82	"Size of the region stack for concurrent marking.") \
ysr@777	83	\
johnc@2494	84	product(double, G1ConcMarkStepDurationMillis, 10.0, \
johnc@2494	85	"Target duration of individual concurrent marking steps " \
johnc@2494	86	"in milliseconds.") \
johnc@2494	87	\
johnc@2494	88	product(intx, G1RefProcDrainInterval, 10, \
johnc@2494	89	"The number of discovered reference objects to process before " \
johnc@2494	90	"draining concurrent marking work queues.") \
johnc@2494	91	\
johnc@2781	92	experimental(bool, G1UseConcMarkReferenceProcessing, true, \
johnc@2718	93	"If true, enable reference discovery during concurrent " \
johnc@2781	94	"marking and reference processing at the end of remark.") \
ysr@777	95	\
tonyp@1717	96	product(intx, G1SATBBufferSize, 1*K, \
ysr@777	97	"Number of entries in an SATB log buffer.") \
ysr@777	98	\
tonyp@1717	99	develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@777	100	"Number of completed buffers that triggers log processing.") \
ysr@777	101	\
tonyp@2469	102	product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
tonyp@2469	103	"Before enqueueing them, each mutator thread tries to do some " \
tonyp@2469	104	"filtering on the SATB buffers it generates. If post-filtering " \
tonyp@2469	105	"the percentage of retained entries is over this threshold " \
tonyp@2469	106	"the buffer will be enqueued for processing. A value of 0 " \
tonyp@2469	107	"specifies that mutator threads should not do such filtering.") \
tonyp@2469	108	\
ysr@777	109	develop(intx, G1ExtraRegionSurvRate, 33, \
ysr@777	110	"If the young survival rate is S, and there's room left in " \
ysr@777	111	"to-space, we will allow regions whose survival rate is up to " \
ysr@777	112	"S + (1 - S)*X, where X is this parameter (as a fraction.)") \
ysr@777	113	\
ysr@777	114	develop(intx, G1InitYoungSurvRatio, 50, \
ysr@777	115	"Expected Survival Rate for newly allocated bytes") \
ysr@777	116	\
ysr@777	117	develop(bool, G1SATBPrintStubs, false, \
ysr@777	118	"If true, print generated stubs for the SATB barrier") \
ysr@777	119	\
tonyp@1717	120	experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@777	121	"When expanding, % of uncommitted space to claim.") \
ysr@777	122	\
ysr@777	123	develop(bool, G1RSBarrierRegionFilter, true, \
ysr@777	124	"If true, generate region filtering code in RS barrier") \
ysr@777	125	\
ysr@777	126	develop(bool, G1RSBarrierNullFilter, true, \
ysr@777	127	"If true, generate null-pointer filtering code in RS barrier") \
ysr@777	128	\
ysr@777	129	develop(bool, G1PrintCTFilterStats, false, \
ysr@777	130	"If true, print stats on RS filtering effectiveness") \
ysr@777	131	\
iveresov@1051	132	develop(bool, G1DeferredRSUpdate, true, \
iveresov@1051	133	"If true, use deferred RS updates") \
iveresov@1051	134	\
ysr@777	135	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	136	"If true, verify that no dirty cards remain after RS log " \
ysr@777	137	"processing.") \
ysr@777	138	\
ysr@777	139	develop(bool, G1RSCountHisto, false, \
ysr@777	140	"If true, print a histogram of RS occupancies after each pause") \
ysr@777	141	\
tonyp@2717	142	product(bool, G1PrintRegionLivenessInfo, false, \
tonyp@2717	143	"Prints the liveness information for all regions in the heap " \
tonyp@2717	144	"at the end of a marking cycle.") \
ysr@777	145	\
ysr@777	146	develop(bool, G1PrintParCleanupStats, false, \
ysr@777	147	"When true, print extra stats about parallel cleanup.") \
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	\
johnc@2713	191	develop(intx, G1MaxHotCardCountSizePercent, 25, \
johnc@2713	192	"The maximum size of the hot card count cache as a " \
johnc@2713	193	"percentage of the number of cards for the maximum heap.") \
johnc@2713	194	\
ysr@777	195	develop(bool, G1PrintOopAppls, false, \
ysr@777	196	"When true, print applications of closures to external locs.") \
ysr@777	197	\
iveresov@1696	198	develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1696	199	"Max number of regions in a fine-grain table per MB.") \
iveresov@1696	200	\
iveresov@1696	201	product(intx, G1RSetRegionEntries, 0, \
iveresov@1696	202	"Max number of regions for which we keep bitmaps." \
iveresov@1696	203	"Will be set ergonomically by default") \
iveresov@1696	204	\
iveresov@1696	205	develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1696	206	"Max number of entries per region in a sparse table " \
iveresov@1696	207	"per MB.") \
iveresov@1696	208	\
iveresov@1696	209	product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1696	210	"Max number of entries per region in a sparse table." \
iveresov@1696	211	"Will be set ergonomically by default.") \
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	\
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@1377	264	product(uintx, G1HeapRegionSize, 0, \
tonyp@1377	265	"Size of the G1 regions.") \
tonyp@1377	266	\
tonyp@1792	267	experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@1073	268	"Enables the parallelization of remembered set updating " \
tonyp@1073	269	"during evacuation pauses") \
tonyp@1073	270	\
tonyp@1792	271	experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@1073	272	"Enables the parallelization of remembered set scanning " \
iveresov@1229	273	"during evacuation pauses") \
iveresov@1229	274	\
tonyp@1717	275	product(uintx, G1ConcRefinementThreads, 0, \
iveresov@1229	276	"If non-0 is the number of parallel rem set update threads, " \
johnc@1325	277	"otherwise the value is determined ergonomically.") \
johnc@1325	278	\
johnc@1325	279	develop(intx, G1CardCountCacheExpandThreshold, 16, \
johnc@1325	280	"Expand the card count cache if the number of collisions for " \
apetrusenko@1375	281	"a particular entry exceeds this value.") \
apetrusenko@1375	282	\
apetrusenko@1375	283	develop(bool, G1VerifyCTCleanup, false, \
ysr@1629	284	"Verify card table cleanup.") \
ysr@1629	285	\
iveresov@1696	286	product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1696	287	"Size of a work unit of cards claimed by a worker thread" \
iveresov@1696	288	"during RSet scanning.") \
iveresov@1696	289	\
tonyp@2472	290	develop(uintx, G1SecondaryFreeListAppendLength, 5, \
tonyp@2472	291	"The number of regions we will add to the secondary free list " \
tonyp@2472	292	"at every append operation") \
tonyp@2472	293	\
tonyp@2472	294	develop(bool, G1ConcRegionFreeingVerbose, false, \
tonyp@2472	295	"Enables verboseness during concurrent region freeing") \
tonyp@2472	296	\
tonyp@2472	297	develop(bool, G1StressConcRegionFreeing, false, \
tonyp@2472	298	"It stresses the concurrent region freeing operation") \
tonyp@2472	299	\
tonyp@2472	300	develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
tonyp@2472	301	"Artificial delay during concurrent region freeing") \
tonyp@2472	302	\
tonyp@2817	303	develop(uintx, G1DummyRegionsPerGC, 0, \
tonyp@2817	304	"The number of dummy regions G1 will allocate at the end of " \
tonyp@2817	305	"each evacuation pause in order to artificially fill up the " \
tonyp@2817	306	"heap and stress the marking implementation.") \
tonyp@2817	307	\
johnc@2504	308	develop(bool, ReduceInitialCardMarksForG1, false, \
ysr@1629	309	"When ReduceInitialCardMarks is true, this flag setting " \
johnc@2504	310	" controls whether G1 allows the RICM optimization") \
johnc@2504	311	\
johnc@2504	312	develop(bool, G1ExitOnExpansionFailure, false, \
johnc@2504	313	"Raise a fatal VM exit out of memory failure in the event " \
tonyp@2848	314	" that heap expansion fails due to running out of swap.") \
tonyp@2848	315	\
tonyp@2848	316	develop(uintx, G1ConcMarkForceOverflow, 0, \
tonyp@2848	317	"The number of times we'll force an overflow during " \
tonyp@2848	318	"concurrent marking")
ysr@777	319
ysr@785	320	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)
stefank@2314	321
stefank@2314	322	#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP