John Cuthbertson
1b62d10b4b
6484982: G1: process references during evacuation pauses
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G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
2011-09-22 10:57:37 -07:00
Stefan Karlsson
5b6ba4e611
7085906: Replace the permgen allocated sentinelRef with a self-looped end
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Remove the sentinelRef and let the last Reference in a discovered chain point back to itself.
Reviewed-by: ysr, jmasa
2011-09-01 16:18:17 +02:00
Frederic Parain
b38843c8d9
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
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Add a notification to the GarbageCollectorMXBeans
Reviewed-by: acorn, mchung
2011-05-12 10:30:11 -07:00
John Coomes
f9b80cdc1c
6841742: par compact - remove unused/unsupported options
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Ignore UseParallel{OldGCDensePrefix,OldGCCompacting,DensePrefixUpdate}
Reviewed-by: jwilhelm, brutisso
2011-04-07 17:16:20 -07:00
Y. Srinivas Ramakrishna
b4b287e7ac
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
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Use _max_num_q = max(discovery_degree, processing_degree), and let balance_queues() redistribute from discovery_degree to processing_degree of queues. This should also allow a more dynamic and flexible parallelism policy in the future.
Reviewed-by: jmasa, johnc
2011-03-17 10:32:46 -07:00
Coleen Phillimore
7b4f8073f0
6990754: Use native memory and reference counting to implement SymbolTable
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Move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
2011-01-27 16:11:27 -08:00
Keith McGuigan
272d7eaffc
7012505: BreakpointWithFullGC.sh fails with Internal Error (src/share/vm/oops/methodOop.cpp:220)
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Rebuild breakpoint cache at gc_epilogue instead of during oops_do
Reviewed-by: dcubed, ysr, coleenp
2011-01-19 13:51:53 -08:00
Stefan Karlsson
8006fe8f75
6989984: Use standard include model for Hospot
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Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
2010-11-23 13:22:55 -08:00
John Coomes
1cdd538ea5
6423256: GC stacks should use a better data structure
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6942771: SEGV in ParScanThreadState::take_from_overflow_stack
Reviewed-by: apetrusenko, ysr, pbk
2010-09-28 15:56:15 -07:00
Jon Masamitsu
28e56b8970
6984287: Regularize how GC parallel workers are specified
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Associate number of GC workers with the workgang as opposed to the task.
Reviewed-by: johnc, ysr
2010-09-20 14:38:38 -07:00
John Coomes
e8dbd32204
6957084: simplify TaskQueue overflow handling
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Reviewed-by: ysr, jmasa
2010-07-01 21:40:45 -07:00
John R Rose
d6a9b93b5a
Merge
2010-06-02 22:45:42 -07:00
Erik Trimble
ba7c173659
6941466: Oracle rebranding changes for Hotspot repositories
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Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
2010-05-27 19:08:38 -07:00
Vladimir Kozlov
cc18a50e59
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
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Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov
2010-05-27 18:01:56 -07:00
John Coomes
7e76feaf42
6888953: some calls to function-like macros are missing semicolons
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Reviewed-by: pbk, kvn
2009-10-11 16:19:25 -07:00
Jon Masamitsu
f5197d0d36
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit
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Ensure a full GC that clears SoftReferences before throwing an out-of-memory
Reviewed-by: ysr, jcoomes
2010-04-13 13:52:10 -07:00
John Coomes
4f82340476
4396719: Mark Sweep stack overflow on deeply nested Object arrays
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Use an explicit stack for object arrays and process them in chunks.
Reviewed-by: iveresov, apetrusenko
2010-03-03 14:48:26 -08:00
John R Rose
f34acd6601
Merge
2009-09-30 13:25:39 -07:00
John R Rose
40d52710f6
Merge
2009-09-23 23:56:15 -07:00
Andrew John Hughes
a6a41760f1
6884552: remove some unnecessary #ifdef's introduced in the fix for 4957990
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Removed the unnecessary #ifdef's which were interfering with the build of the Zero-assembler port
Reviewed-by: ysr, jcoomes
2009-09-23 11:36:06 -07:00
John R Rose
e261aecad8
6863023: need non-perm oops in code cache for JSR 292
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Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
2009-09-15 21:53:47 -07:00
Y. Srinivas Ramakrishna
c6763b5bad
4957990: Perm heap bloat in JVM
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Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.
Reviewed-by: jcoomes, jmasa, kvn, never
2009-09-02 00:04:29 -07:00
John Coomes
bc706440bd
6810474: par compact - crash in summary_phase with very full heap
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Reviewed-by: tonyp
2009-03-03 14:23:18 -08:00
Erik Trimble
8d6035660e
Merge
2009-03-12 18:16:36 -07:00
Xiomara Jayasena
2be2e027b0
6814575: Update copyright year
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Update copyright for files that have been modified in 2009, up to 03/09
Reviewed-by: katleman, tbell, ohair
2009-03-09 13:28:46 -07:00
Y. Srinivas Ramakrishna
72bfacbd95
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
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Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
2009-03-02 16:37:04 -08:00
Jon Masamitsu
3b5d6a04dd
6690928: Use spinning in combination with yields for workstealing termination
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Substitute a spin loop for most calls to yield() to reduce the stress on the system.
Reviewed-by: tonyp
2009-02-08 13:18:01 -08:00
John Coomes
f3c34ce9b6
6786188: par compact - "SplitALot" stress mode should fill to_space
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Reviewed-by: jmasa, tonyp
2008-12-18 10:54:01 -08:00
John Coomes
f90394b6fb
6784849: par compact - can fail when to_space is non-empty
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Reviewed-by: jmasa, tonyp
2008-12-18 10:53:35 -08:00
John Coomes
8fc946854c
6765954: par compact - stress mode for splitting young gen spaces
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Reviewed-by: jmasa
2008-12-11 12:05:21 -08:00
John Coomes
7a9585170d
6765745: par compact - allow young gen spaces to be split
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Reviewed-by: jmasa
2008-12-11 12:05:14 -08:00
John Coomes
000b184507
6578152: fill_region_with_object has usability and safety issues
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Reviewed-by: apetrusenko, ysr
2008-12-11 12:05:08 -08:00
Y. Srinivas Ramakrishna
16aa57cb4b
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
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Renamed Reference{Policy,Pocessor} methods from snap{,_policy}() to setup{,_policy}()
Reviewed-by: apetrusenko
2008-12-01 23:25:24 -08:00
Y. Srinivas Ramakrishna
7d7cf3f8af
6684579: SoftReference processing can be made more efficient
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For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
2008-11-20 16:56:09 -08:00
John Coomes
e98b7ce059
6729594: par compact - remove unused block table implementation
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Reviewed-by: tonyp, jmasa, apetrusenko
2008-09-30 13:15:27 -07:00
John Coomes
f2851186bb
6725697: par compact - rename class ChunkData to RegionData
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Reviewed-by: iveresov, tonyp
2008-09-30 12:20:22 -07:00
John Coomes
2e52e9dff2
6716466: par compact - remove VerifyParallelOldWithMarkSweep code
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Reviewed-by: jmasa
2008-09-30 11:49:31 -07:00
Jon Masamitsu
b8633a3b01
Merge
2008-07-28 15:30:23 -07:00
Coleen Phillimore
20dba03e99
6716785: implicit null checks not triggering with CompressedOops
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Allocate alignment-sized page(s) below java heap so that memory accesses at heap_base+1page give signal and cause an implicit null check
Reviewed-by: kvn, jmasa, phh, jcoomes
2008-07-19 17:38:22 -04:00
John Coomes
26625ab7f5
6724367: par compact could clear less young gen summary data
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Reviewed-by: jmasa, apetrusenko
2008-07-11 16:11:50 -07:00
John Coomes
038a30dde3
6483129: par compact assertion failure (new_top > bottom)
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Avoid computing the dense prefix if a space is empty
Reviewed-by: pbk, tonyp
2008-07-11 16:11:43 -07:00
John Coomes
398aa66a77
6718283: existing uses of *_FORMAT_W() were broken by 6521491
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Reviewed-by: ysr, pbk
2008-07-11 16:11:34 -07:00
Erik Trimble
2d6f42d18c
Merge
2008-07-11 01:14:44 -07:00
Jon Masamitsu
18dbebd143
6672698: mangle_unused_area() should not remangle the entire heap at each collection
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Maintain a high water mark for the allocations in a space and mangle only up to that high water mark.
Reviewed-by: ysr, apetrusenko
2008-07-09 15:08:55 -07:00
Xiomara Jayasena
c96a95c4b8
6719955: Update copyright year
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Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
2008-07-02 12:55:16 -07:00
John Coomes
93584b3060
6676016: ParallelOldGC leaks memory
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Ensure that GCTask threads release resource and handle memory
Reviewed-by: jmasa, chrisphi
2008-06-18 18:36:47 -07:00
Igor Veresov
035662396c
Merge
2008-05-04 03:29:31 -07:00
Andrey Petrusenko
f784be24d1
Merge
2008-04-16 12:58:03 +04:00
Coleen Phillimore
4a831d45f0
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
2008-04-13 17:43:42 -04:00
Andrey Petrusenko
252a10cf1a
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
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Reviewed-by: ysr, jmasa
2008-04-01 15:13:47 +04:00
