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src/share/vm/gc_implementation/g1/g1_globals.hpp@191174b49bec (annotated)

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

Mon, 24 Mar 2014 15:30:14 +0100

author

tschatzl

date

Mon, 24 Mar 2014 15:30:14 +0100

changeset 6402

191174b49bec

parent 6229

5a32d2a3cc1e

child 6876

710a3c8b516e

child 7005

e0954897238a

child 7019

755930f931e3

permissions

-rw-r--r--

8035406: Improve data structure for Code Cache remembered sets
Summary: Change the code cache remembered sets data structure from a GrowableArray to a chunked list of nmethods. This makes the data structure more amenable to parallelization, and decreases freeing time.
Reviewed-by: mgerdin, brutisso

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	\
iveresov@1051	111	develop(bool, G1DeferredRSUpdate, true, \
iveresov@1051	112	"If true, use deferred RS updates") \
iveresov@1051	113	\
ysr@777	114	develop(bool, G1RSLogCheckCardTable, false, \
ysr@777	115	"If true, verify that no dirty cards remain after RS log " \
ysr@777	116	"processing.") \
ysr@777	117	\
tonyp@3121	118	diagnostic(bool, G1PrintRegionLivenessInfo, false, \
tonyp@3121	119	"Prints the liveness information for all regions in the heap " \
tonyp@3121	120	"at the end of a marking cycle.") \
ysr@777	121	\
tonyp@1318	122	product(intx, G1UpdateBufferSize, 256, \
tonyp@1318	123	"Size of an update buffer") \
tonyp@1318	124	\
tonyp@1717	125	product(intx, G1ConcRefinementYellowZone, 0, \
tonyp@1318	126	"Number of enqueued update buffers that will " \
iveresov@1546	127	"trigger concurrent processing. Will be selected ergonomically " \
iveresov@1546	128	"by default.") \
tonyp@1318	129	\
tonyp@1717	130	product(intx, G1ConcRefinementRedZone, 0, \
tonyp@1318	131	"Maximum number of enqueued update buffers before mutator " \
iveresov@1546	132	"threads start processing new ones instead of enqueueing them. " \
iveresov@1546	133	"Will be selected ergonomically by default. Zero will disable " \
iveresov@1546	134	"concurrent processing.") \
iveresov@1546	135	\
tonyp@1717	136	product(intx, G1ConcRefinementGreenZone, 0, \
iveresov@1546	137	"The number of update buffers that are left in the queue by the " \
iveresov@1546	138	"concurrent processing threads. Will be selected ergonomically " \
iveresov@1546	139	"by default.") \
iveresov@1546	140	\
tonyp@1717	141	product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
iveresov@1546	142	"The last concurrent refinement thread wakes up every " \
iveresov@1546	143	"specified number of milliseconds to do miscellaneous work.") \
iveresov@1546	144	\
tonyp@1717	145	product(intx, G1ConcRefinementThresholdStep, 0, \
iveresov@1546	146	"Each time the rset update queue increases by this amount " \
iveresov@1546	147	"activate the next refinement thread if available. " \
iveresov@1546	148	"Will be selected ergonomically by default.") \
iveresov@1546	149	\
tonyp@1717	150	product(intx, G1RSetUpdatingPauseTimePercent, 10, \
iveresov@1546	151	"A target percentage of time that is allowed to be spend on " \
iveresov@1546	152	"process RS update buffers during the collection pause.") \
iveresov@1546	153	\
tonyp@1717	154	product(bool, G1UseAdaptiveConcRefinement, true, \
iveresov@1546	155	"Select green, yellow and red zones adaptively to meet the " \
iveresov@1546	156	"the pause requirements.") \
ysr@777	157	\
johnc@5078	158	product(uintx, G1ConcRSLogCacheSize, 10, \
ysr@777	159	"Log base 2 of the length of conc RS hot-card cache.") \
ysr@777	160	\
johnc@5078	161	product(uintx, G1ConcRSHotCardLimit, 4, \
ysr@777	162	"The threshold that defines (>=) a hot card.") \
ysr@777	163	\
iveresov@1696	164	develop(intx, G1RSetRegionEntriesBase, 256, \
iveresov@1696	165	"Max number of regions in a fine-grain table per MB.") \
iveresov@1696	166	\
iveresov@1696	167	product(intx, G1RSetRegionEntries, 0, \
iveresov@1696	168	"Max number of regions for which we keep bitmaps." \
iveresov@1696	169	"Will be set ergonomically by default") \
iveresov@1696	170	\
iveresov@1696	171	develop(intx, G1RSetSparseRegionEntriesBase, 4, \
iveresov@1696	172	"Max number of entries per region in a sparse table " \
iveresov@1696	173	"per MB.") \
iveresov@1696	174	\
iveresov@1696	175	product(intx, G1RSetSparseRegionEntries, 0, \
iveresov@1696	176	"Max number of entries per region in a sparse table." \
iveresov@1696	177	"Will be set ergonomically by default.") \
ysr@777	178	\
ysr@777	179	develop(bool, G1RecordHRRSOops, false, \
ysr@777	180	"When true, record recent calls to rem set operations.") \
ysr@777	181	\
ysr@777	182	develop(bool, G1RecordHRRSEvents, false, \
ysr@777	183	"When true, record recent calls to rem set operations.") \
ysr@777	184	\
ysr@777	185	develop(intx, G1MaxVerifyFailures, -1, \
ysr@777	186	"The maximum number of verification failrues to print. " \
ysr@777	187	"-1 means print all.") \
ysr@777	188	\
ysr@777	189	develop(bool, G1ScrubRemSets, true, \
ysr@777	190	"When true, do RS scrubbing after cleanup.") \
ysr@777	191	\
ysr@777	192	develop(bool, G1RSScrubVerbose, false, \
ysr@777	193	"When true, do RS scrubbing with verbose output.") \
ysr@777	194	\
ysr@777	195	develop(bool, G1YoungSurvRateVerbose, false, \
ysr@777	196	"print out the survival rate of young regions according to age.") \
ysr@777	197	\
ysr@777	198	develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
ysr@777	199	"the number of regions for which we'll print a surv rate " \
ysr@777	200	"summary.") \
ysr@777	201	\
tonyp@3119	202	product(uintx, G1ReservePercent, 10, \
ysr@777	203	"It determines the minimum reserve we should have in the heap " \
ysr@777	204	"to minimize the probability of promotion failure.") \
ysr@777	205	\
tonyp@1717	206	diagnostic(bool, G1PrintHeapRegions, false, \
ysr@777	207	"If set G1 will print information on which regions are being " \
ysr@777	208	"allocated and which are reclaimed.") \
ysr@777	209	\
ysr@777	210	develop(bool, G1HRRSUseSparseTable, true, \
ysr@777	211	"When true, use sparse table to save space.") \
ysr@777	212	\
ysr@777	213	develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
ysr@777	214	"Forces flushing of log buffers before verification.") \
ysr@777	215	\
ysr@1522	216	develop(bool, G1FailOnFPError, false, \
ysr@1522	217	"When set, G1 will fail when it encounters an FP 'error', " \
ysr@1522	218	"so as to allow debugging") \
ysr@1522	219	\
tonyp@1377	220	product(uintx, G1HeapRegionSize, 0, \
tonyp@1377	221	"Size of the G1 regions.") \
tonyp@1377	222	\
tonyp@1792	223	experimental(bool, G1UseParallelRSetUpdating, true, \
tonyp@1073	224	"Enables the parallelization of remembered set updating " \
tonyp@1073	225	"during evacuation pauses") \
tonyp@1073	226	\
tonyp@1792	227	experimental(bool, G1UseParallelRSetScanning, true, \
tonyp@1073	228	"Enables the parallelization of remembered set scanning " \
iveresov@1229	229	"during evacuation pauses") \
iveresov@1229	230	\
tonyp@1717	231	product(uintx, G1ConcRefinementThreads, 0, \
iveresov@1229	232	"If non-0 is the number of parallel rem set update threads, " \
johnc@1325	233	"otherwise the value is determined ergonomically.") \
johnc@1325	234	\
apetrusenko@1375	235	develop(bool, G1VerifyCTCleanup, false, \
ysr@1629	236	"Verify card table cleanup.") \
ysr@1629	237	\
iveresov@1696	238	product(uintx, G1RSetScanBlockSize, 64, \
iveresov@1696	239	"Size of a work unit of cards claimed by a worker thread" \
iveresov@1696	240	"during RSet scanning.") \
iveresov@1696	241	\
tonyp@2472	242	develop(uintx, G1SecondaryFreeListAppendLength, 5, \
tonyp@2472	243	"The number of regions we will add to the secondary free list " \
tonyp@2472	244	"at every append operation") \
tonyp@2472	245	\
tonyp@2472	246	develop(bool, G1ConcRegionFreeingVerbose, false, \
tonyp@2472	247	"Enables verboseness during concurrent region freeing") \
tonyp@2472	248	\
tonyp@2472	249	develop(bool, G1StressConcRegionFreeing, false, \
tonyp@2472	250	"It stresses the concurrent region freeing operation") \
tonyp@2472	251	\
tonyp@2472	252	develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
tonyp@2472	253	"Artificial delay during concurrent region freeing") \
tonyp@2472	254	\
tonyp@2817	255	develop(uintx, G1DummyRegionsPerGC, 0, \
tonyp@2817	256	"The number of dummy regions G1 will allocate at the end of " \
tonyp@2817	257	"each evacuation pause in order to artificially fill up the " \
tonyp@2817	258	"heap and stress the marking implementation.") \
tonyp@2817	259	\
johnc@2504	260	develop(bool, G1ExitOnExpansionFailure, false, \
johnc@2504	261	"Raise a fatal VM exit out of memory failure in the event " \
tonyp@2848	262	" that heap expansion fails due to running out of swap.") \
tonyp@2848	263	\
tonyp@2848	264	develop(uintx, G1ConcMarkForceOverflow, 0, \
tonyp@2848	265	"The number of times we'll force an overflow during " \
brutisso@3358	266	"concurrent marking") \
brutisso@3358	267	\
johnc@4455	268	experimental(uintx, G1NewSizePercent, 5, \
johnc@4385	269	"Percentage (0-100) of the heap size to use as default " \
johnc@4385	270	"minimum young gen size.") \
brutisso@3358	271	\
johnc@4455	272	experimental(uintx, G1MaxNewSizePercent, 60, \
johnc@4385	273	"Percentage (0-100) of the heap size to use as default " \
johnc@4385	274	" maximum young gen size.") \
tonyp@3539	275	\
johnc@4455	276	experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \
johnc@4385	277	"Threshold for regions to be considered for inclusion in the " \
johnc@4385	278	"collection set of mixed GCs. " \
johnc@4385	279	"Regions with live bytes exceeding this will not be collected.") \
tonyp@3539	280	\
johnc@4455	281	product(uintx, G1HeapWastePercent, 10, \
tonyp@3667	282	"Amount of space, expressed as a percentage of the heap size, " \
tonyp@3667	283	"that G1 is willing not to collect to avoid expensive GCs.") \
tonyp@3539	284	\
johnc@4455	285	product(uintx, G1MixedGCCountTarget, 8, \
tonyp@3667	286	"The target number of mixed GCs after a marking cycle.") \
tonyp@3539	287	\
tschatzl@6402	288	experimental(uintx, G1CodeRootsChunkCacheKeepPercent, 10, \
tschatzl@6402	289	"The amount of code root chunks that should be kept at most " \
tschatzl@6402	290	"as percentage of already allocated.") \
tschatzl@6402	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, \
johnc@5205	328	"If true, perform verification of each heap region's " \
johnc@5548	329	"remembered set when verifying the heap during a full GC.") \
johnc@5548	330	\
johnc@5548	331	diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \
johnc@5548	332	"Verify the code root lists attached to each heap region.")
ysr@777	333
ysr@785	334	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	335
stefank@2314	336	#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP