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src/share/vm/gc_implementation/g1/g1_globals.hpp@6948da6d7c13 (annotated)

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

Tue, 30 Sep 2014 09:44:36 +0200

author

tschatzl

date

Tue, 30 Sep 2014 09:44:36 +0200

changeset 7218

6948da6d7c13

parent 7208

7baf47cb97cb

child 7258

fa14838b03c4

permissions

-rw-r--r--

8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
Summary: Remove -XX:-G1DeferredRSUpdate functionality as it is racy. During evacuation failure handling, threads where evacuation failure handling occurred may try to add remembered sets to regions which remembered sets are currently being scanned. The iterator to handle the remembered set scan does not support addition of entries during scan and so may skip valid references.
Reviewed-by: iveresov, brutisso, mgerdin

ysr@777	1	/*
tschatzl@6402	2	* Copyright (c) 2001, 2014, 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"
ysr@777	29	//
ysr@777	30	// Defines all globals flags used by the garbage-first compiler.
ysr@777	31	//
ysr@777	32
ysr@785	33	#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
ysr@777	34	\
poonam@4650	35	product(uintx, G1ConfidencePercent, 50, \
ysr@777	36	"Confidence level for MMU/pause predictions") \
ysr@777	37	\
tonyp@1319	38	develop(intx, G1MarkingOverheadPercent, 0, \
ysr@777	39	"Overhead of concurrent marking") \
ysr@777	40	\
ysr@777	41	develop(intx, G1MarkingVerboseLevel, 0, \
ysr@777	42	"Level (0-4) of verboseness of the marking code") \
ysr@777	43	\
tonyp@1479	44	develop(bool, G1PrintReachableAtInitialMark, false, \
tonyp@1479	45	"Reachable object dump at the initial mark pause") \
tonyp@1479	46	\
tonyp@1479	47	develop(bool, G1VerifyDuringGCPrintReachable, false, \
tonyp@1479	48	"If conc mark verification fails, dump reachable objects") \
tonyp@1479	49	\
tonyp@1479	50	develop(ccstr, G1PrintReachableBaseFile, NULL, \
tonyp@1479	51	"The base file name for the reachable object dumps") \
ysr@777	52	\
ysr@777	53	develop(bool, G1TraceMarkStackOverflow, false, \
ysr@777	54	"If true, extra debugging code for CM restart for ovflw.") \
ysr@777	55	\
johnc@3891	56	develop(bool, G1TraceHeapRegionRememberedSet, false, \
johnc@3891	57	"Enables heap region remembered set debug logs") \
johnc@3891	58	\
tonyp@1717	59	diagnostic(bool, G1SummarizeConcMark, false, \
ysr@777	60	"Summarize concurrent mark info") \
ysr@777	61	\
johnc@1186	62	diagnostic(bool, G1SummarizeRSetStats, false, \
ysr@777	63	"Summarize remembered set processing info") \
ysr@777	64	\
tonyp@1319	65	diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
tonyp@1319	66	"The period (in number of GCs) at which we will generate " \
tonyp@1319	67	"update buffer processing info " \
tonyp@1319	68	"(0 means do not periodically generate this info); " \
tonyp@1319	69	"it also requires -XX:+G1SummarizeRSetStats") \
tonyp@1319	70	\
tonyp@1717	71	diagnostic(bool, G1TraceConcRefinement, false, \
ysr@777	72	"Trace G1 concurrent refinement") \
ysr@777	73	\
tschatzl@6229	74	experimental(bool, G1TraceStringSymbolTableScrubbing, false, \
tschatzl@6229	75	"Trace information string and symbol table scrubbing.") \
tschatzl@6229	76	\
johnc@2494	77	product(double, G1ConcMarkStepDurationMillis, 10.0, \
johnc@2494	78	"Target duration of individual concurrent marking steps " \
johnc@2494	79	"in milliseconds.") \
johnc@2494	80	\
johnc@2494	81	product(intx, G1RefProcDrainInterval, 10, \
johnc@2494	82	"The number of discovered reference objects to process before " \
johnc@2494	83	"draining concurrent marking work queues.") \
johnc@2494	84	\
johnc@2781	85	experimental(bool, G1UseConcMarkReferenceProcessing, true, \
johnc@2718	86	"If true, enable reference discovery during concurrent " \
johnc@2781	87	"marking and reference processing at the end of remark.") \
ysr@777	88	\
tonyp@1717	89	product(intx, G1SATBBufferSize, 1*K, \
ysr@777	90	"Number of entries in an SATB log buffer.") \
ysr@777	91	\
tonyp@1717	92	develop(intx, G1SATBProcessCompletedThreshold, 20, \
ysr@777	93	"Number of completed buffers that triggers log processing.") \
ysr@777	94	\
tonyp@2469	95	product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
tonyp@2469	96	"Before enqueueing them, each mutator thread tries to do some " \
tonyp@2469	97	"filtering on the SATB buffers it generates. If post-filtering " \
tonyp@2469	98	"the percentage of retained entries is over this threshold " \
tonyp@2469	99	"the buffer will be enqueued for processing. A value of 0 " \
tonyp@2469	100	"specifies that mutator threads should not do such filtering.") \
tonyp@2469	101	\
ysr@777	102	develop(bool, G1SATBPrintStubs, false, \
ysr@777	103	"If true, print generated stubs for the SATB barrier") \
ysr@777	104	\
tonyp@1717	105	experimental(intx, G1ExpandByPercentOfAvailable, 20, \
ysr@777	106	"When expanding, % of uncommitted space to claim.") \
ysr@777	107	\
ysr@777	108	develop(bool, G1RSBarrierRegionFilter, true, \
ysr@777	109	"If true, generate region filtering code in RS barrier") \
ysr@777	110	\
ysr@777	111	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	112	"If true, verify that no dirty cards remain after RS log " \
ysr@777	113	"processing.") \
ysr@777	114	\
tonyp@3121	115	diagnostic(bool, G1PrintRegionLivenessInfo, false, \
tonyp@3121	116	"Prints the liveness information for all regions in the heap " \
tonyp@3121	117	"at the end of a marking cycle.") \
ysr@777	118	\
tonyp@1318	119	product(intx, G1UpdateBufferSize, 256, \
tonyp@1318	120	"Size of an update buffer") \
tonyp@1318	121	\
tonyp@1717	122	product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@1318	123	"Number of enqueued update buffers that will " \
iveresov@1546	124	"trigger concurrent processing. Will be selected ergonomically " \
iveresov@1546	125	"by default.") \
tonyp@1318	126	\
tonyp@1717	127	product(intx, G1ConcRefinementRedZone, 0, \
tonyp@1318	128	"Maximum number of enqueued update buffers before mutator " \
iveresov@1546	129	"threads start processing new ones instead of enqueueing them. " \
iveresov@1546	130	"Will be selected ergonomically by default. Zero will disable " \
iveresov@1546	131	"concurrent processing.") \
iveresov@1546	132	\
tonyp@1717	133	product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1546	134	"The number of update buffers that are left in the queue by the " \
iveresov@1546	135	"concurrent processing threads. Will be selected ergonomically " \
iveresov@1546	136	"by default.") \
iveresov@1546	137	\
tonyp@1717	138	product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1546	139	"The last concurrent refinement thread wakes up every " \
iveresov@1546	140	"specified number of milliseconds to do miscellaneous work.") \
iveresov@1546	141	\
tonyp@1717	142	product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1546	143	"Each time the rset update queue increases by this amount " \
iveresov@1546	144	"activate the next refinement thread if available. " \
iveresov@1546	145	"Will be selected ergonomically by default.") \
iveresov@1546	146	\
tonyp@1717	147	product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1546	148	"A target percentage of time that is allowed to be spend on " \
iveresov@1546	149	"process RS update buffers during the collection pause.") \
iveresov@1546	150	\
tonyp@1717	151	product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1546	152	"Select green, yellow and red zones adaptively to meet the " \
iveresov@1546	153	"the pause requirements.") \
ysr@777	154	\
johnc@5078	155	product(uintx, G1ConcRSLogCacheSize, 10, \
ysr@777	156	"Log base 2 of the length of conc RS hot-card cache.") \
ysr@777	157	\
johnc@5078	158	product(uintx, G1ConcRSHotCardLimit, 4, \
ysr@777	159	"The threshold that defines (>=) a hot card.") \
ysr@777	160	\
iveresov@1696	161	develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1696	162	"Max number of regions in a fine-grain table per MB.") \
iveresov@1696	163	\
iveresov@1696	164	product(intx, G1RSetRegionEntries, 0, \
iveresov@1696	165	"Max number of regions for which we keep bitmaps." \
iveresov@1696	166	"Will be set ergonomically by default") \
iveresov@1696	167	\
iveresov@1696	168	develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1696	169	"Max number of entries per region in a sparse table " \
iveresov@1696	170	"per MB.") \
iveresov@1696	171	\
iveresov@1696	172	product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1696	173	"Max number of entries per region in a sparse table." \
iveresov@1696	174	"Will be set ergonomically by default.") \
ysr@777	175	\
ysr@777	176	develop(bool, G1RecordHRRSOops, false, \
ysr@777	177	"When true, record recent calls to rem set operations.") \
ysr@777	178	\
ysr@777	179	develop(bool, G1RecordHRRSEvents, false, \
ysr@777	180	"When true, record recent calls to rem set operations.") \
ysr@777	181	\
ysr@777	182	develop(intx, G1MaxVerifyFailures, -1, \
ysr@777	183	"The maximum number of verification failrues to print. " \
ysr@777	184	"-1 means print all.") \
ysr@777	185	\
ysr@777	186	develop(bool, G1ScrubRemSets, true, \
ysr@777	187	"When true, do RS scrubbing after cleanup.") \
ysr@777	188	\
ysr@777	189	develop(bool, G1RSScrubVerbose, false, \
ysr@777	190	"When true, do RS scrubbing with verbose output.") \
ysr@777	191	\
ysr@777	192	develop(bool, G1YoungSurvRateVerbose, false, \
ysr@777	193	"print out the survival rate of young regions according to age.") \
ysr@777	194	\
ysr@777	195	develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@777	196	"the number of regions for which we'll print a surv rate " \
ysr@777	197	"summary.") \
ysr@777	198	\
tonyp@3119	199	product(uintx, G1ReservePercent, 10, \
ysr@777	200	"It determines the minimum reserve we should have in the heap " \
ysr@777	201	"to minimize the probability of promotion failure.") \
ysr@777	202	\
tonyp@1717	203	diagnostic(bool, G1PrintHeapRegions, false, \
ysr@777	204	"If set G1 will print information on which regions are being " \
ysr@777	205	"allocated and which are reclaimed.") \
ysr@777	206	\
ysr@777	207	develop(bool, G1HRRSUseSparseTable, true, \
ysr@777	208	"When true, use sparse table to save space.") \
ysr@777	209	\
ysr@777	210	develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@777	211	"Forces flushing of log buffers before verification.") \
ysr@777	212	\
ysr@1522	213	develop(bool, G1FailOnFPError, false, \
ysr@1522	214	"When set, G1 will fail when it encounters an FP 'error', " \
ysr@1522	215	"so as to allow debugging") \
ysr@1522	216	\
tonyp@1377	217	product(uintx, G1HeapRegionSize, 0, \
tonyp@1377	218	"Size of the G1 regions.") \
tonyp@1377	219	\
tonyp@1792	220	experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@1073	221	"Enables the parallelization of remembered set updating " \
tonyp@1073	222	"during evacuation pauses") \
tonyp@1073	223	\
tonyp@1792	224	experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@1073	225	"Enables the parallelization of remembered set scanning " \
iveresov@1229	226	"during evacuation pauses") \
iveresov@1229	227	\
tonyp@1717	228	product(uintx, G1ConcRefinementThreads, 0, \
iveresov@1229	229	"If non-0 is the number of parallel rem set update threads, " \
johnc@1325	230	"otherwise the value is determined ergonomically.") \
johnc@1325	231	\
apetrusenko@1375	232	develop(bool, G1VerifyCTCleanup, false, \
ysr@1629	233	"Verify card table cleanup.") \
ysr@1629	234	\
iveresov@1696	235	product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1696	236	"Size of a work unit of cards claimed by a worker thread" \
iveresov@1696	237	"during RSet scanning.") \
iveresov@1696	238	\
tonyp@2472	239	develop(uintx, G1SecondaryFreeListAppendLength, 5, \
tonyp@2472	240	"The number of regions we will add to the secondary free list " \
tonyp@2472	241	"at every append operation") \
tonyp@2472	242	\
tonyp@2472	243	develop(bool, G1ConcRegionFreeingVerbose, false, \
tonyp@2472	244	"Enables verboseness during concurrent region freeing") \
tonyp@2472	245	\
tonyp@2472	246	develop(bool, G1StressConcRegionFreeing, false, \
tonyp@2472	247	"It stresses the concurrent region freeing operation") \
tonyp@2472	248	\
tonyp@2472	249	develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
tonyp@2472	250	"Artificial delay during concurrent region freeing") \
tonyp@2472	251	\
tonyp@2817	252	develop(uintx, G1DummyRegionsPerGC, 0, \
tonyp@2817	253	"The number of dummy regions G1 will allocate at the end of " \
tonyp@2817	254	"each evacuation pause in order to artificially fill up the " \
tonyp@2817	255	"heap and stress the marking implementation.") \
tonyp@2817	256	\
johnc@2504	257	develop(bool, G1ExitOnExpansionFailure, false, \
johnc@2504	258	"Raise a fatal VM exit out of memory failure in the event " \
tonyp@2848	259	" that heap expansion fails due to running out of swap.") \
tonyp@2848	260	\
tonyp@2848	261	develop(uintx, G1ConcMarkForceOverflow, 0, \
tonyp@2848	262	"The number of times we'll force an overflow during " \
brutisso@3358	263	"concurrent marking") \
brutisso@3358	264	\
johnc@4455	265	experimental(uintx, G1NewSizePercent, 5, \
johnc@4385	266	"Percentage (0-100) of the heap size to use as default " \
johnc@4385	267	"minimum young gen size.") \
brutisso@3358	268	\
johnc@4455	269	experimental(uintx, G1MaxNewSizePercent, 60, \
johnc@4385	270	"Percentage (0-100) of the heap size to use as default " \
johnc@4385	271	" maximum young gen size.") \
tonyp@3539	272	\
johnc@4455	273	experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \
johnc@4385	274	"Threshold for regions to be considered for inclusion in the " \
johnc@4385	275	"collection set of mixed GCs. " \
johnc@4385	276	"Regions with live bytes exceeding this will not be collected.") \
tonyp@3539	277	\
johnc@4455	278	product(uintx, G1HeapWastePercent, 10, \
tonyp@3667	279	"Amount of space, expressed as a percentage of the heap size, " \
tonyp@3667	280	"that G1 is willing not to collect to avoid expensive GCs.") \
tonyp@3539	281	\
johnc@4455	282	product(uintx, G1MixedGCCountTarget, 8, \
tonyp@3667	283	"The target number of mixed GCs after a marking cycle.") \
tonyp@3539	284	\
tschatzl@7019	285	experimental(bool, G1ReclaimDeadHumongousObjectsAtYoungGC, true, \
tschatzl@7019	286	"Try to reclaim dead large objects at every young GC.") \
tschatzl@7019	287	\
tschatzl@7019	288	experimental(bool, G1TraceReclaimDeadHumongousObjectsAtYoungGC, false, \
tschatzl@7019	289	"Print some information about large object liveness " \
tschatzl@7019	290	"at every young GC.") \
tschatzl@7019	291	\
brutisso@3999	292	experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
tonyp@3539	293	"An upper bound for the number of old CSet regions expressed " \
brutisso@3710	294	"as a percentage of the heap size.") \
brutisso@3710	295	\
brutisso@3710	296	experimental(ccstr, G1LogLevel, NULL, \
johnc@4016	297	"Log level for G1 logging: fine, finer, finest") \
johnc@4016	298	\
johnc@4016	299	notproduct(bool, G1EvacuationFailureALot, false, \
johnc@4016	300	"Force use of evacuation failure handling during certain " \
johnc@4016	301	"evacuation pauses") \
johnc@4016	302	\
johnc@4016	303	develop(uintx, G1EvacuationFailureALotCount, 1000, \
johnc@4016	304	"Number of successful evacuations between evacuation failures " \
johnc@4016	305	"occurring at object copying") \
johnc@4016	306	\
johnc@4016	307	develop(uintx, G1EvacuationFailureALotInterval, 5, \
johnc@4016	308	"Total collections between forced triggering of evacuation " \
johnc@4016	309	"failures") \
johnc@4016	310	\
johnc@4016	311	develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
johnc@4016	312	"Force use of evacuation failure handling during evacuation " \
johnc@4016	313	"pauses when marking is in progress") \
johnc@4016	314	\
johnc@4016	315	develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
johnc@4016	316	"Force use of evacuation failure handling during initial mark " \
johnc@4016	317	"evacuation pauses") \
johnc@4016	318	\
johnc@4016	319	develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
johnc@4016	320	"Force use of evacuation failure handling during young " \
johnc@4016	321	"evacuation pauses") \
johnc@4016	322	\
johnc@4016	323	develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
johnc@4016	324	"Force use of evacuation failure handling during mixed " \
johnc@5205	325	"evacuation pauses") \
johnc@5205	326	\
johnc@5205	327	diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \
brutisso@7005	328	"If true, perform verification of each heap region's " \
brutisso@7005	329	"remembered set when verifying the heap during a full GC.") \
johnc@5548	330	\
johnc@5548	331	diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \
brutisso@7005	332	"Verify the code root lists attached to each heap region.") \
brutisso@7005	333	\
brutisso@7005	334	develop(bool, G1VerifyBitmaps, false, \
brutisso@7005	335	"Verifies the consistency of the marking bitmaps")
ysr@777	336
ysr@785	337	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	338
stefank@2314	339	#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP