- 06 4月, 2012 1 次提交
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由 tonyp 提交于
Summary: Removed lots of dead code after some recent conc mark changes. Reviewed-by: brutisso, johnc
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- 16 2月, 2012 1 次提交
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由 tonyp 提交于
Summary: Revamp of the mechanism that chooses old regions for inclusion in the CSet. It simplifies the code and introduces min and max bounds on the number of old regions added to the CSet at each mixed GC to avoid pathological cases. It also ensures that when we do a mixed GC we'll always find old regions to add to the CSet (i.e., it eliminates the case where a mixed GC will collect no old regions which can happen today). Reviewed-by: johnc, brutisso
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- 12 1月, 2012 1 次提交
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由 johnc 提交于
Summary: Remove the separate counting phase of concurrent marking by tracking the amount of marked bytes and the cards spanned by marked objects in marking task/worker thread local data structures, which are updated as individual objects are marked. Reviewed-by: brutisso, tonyp
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- 11 1月, 2012 1 次提交
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由 tonyp 提交于
Summary: This change simplifies the interaction between GC and concurrent marking. By disabling survivor spaces during the initial-mark pause we don't need to propagate marks of objects we copy during each GC (since we never need to copy an explicitly marked object). Reviewed-by: johnc, brutisso
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- 24 12月, 2011 1 次提交
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由 johnc 提交于
Summary: Parallelize the removal of self forwarding pointers etc. by wrapping in a HeapRegion closure, which is then wrapped inside an AbstractGangTask. Reviewed-by: tonyp, iveresov
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- 18 11月, 2011 1 次提交
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由 johnc 提交于
Summary: Parallelize the serial code that was used to mark objects reachable from survivor objects in the collection set. Some minor improvments in the timers used to track the freeing of the collection set along with some tweaks to PrintGCDetails. Reviewed-by: tonyp, brutisso
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- 24 10月, 2011 1 次提交
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由 johnc 提交于
7102445: G1: Unnecessary Resource allocations during RSet scanning Summary: Add a new per-worker thread line in the PrintGCDetails output. GC Worker Other is the difference between the elapsed time for the parallel phase of the evacuation pause and the sum of the times of the sub-phases (external root scanning, mark stack scanning, RSet updating, RSet scanning, object copying, and termination) for that worker. During RSet scanning, stack allocate DirtyCardToOopClosure objects; allocating these in a resource area was causing abnormally high GC Worker Other times while the worker thread freed ResourceArea chunks. Reviewed-by: tonyp, jwilhelm, brutisso
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- 20 10月, 2011 1 次提交
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由 brutisso 提交于
7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range. Summary: Introduced a version of is_in_reserved() that looks at _orig_end as opposed to _end. Reviewed-by: tonyp, stefank
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- 05 10月, 2011 1 次提交
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由 johnc 提交于
Summary: Declare GrainBytes, GrainWords, and CardsPerRegion as size_t. Reviewed-by: jcoomes, tonyp, jmasa
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- 24 9月, 2011 1 次提交
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由 tonyp 提交于
Summary: Fixed a few inconsistencies in the monitoring data, in particular when reported from jstat. Reviewed-by: jmasa, brutisso, johnc
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- 23 9月, 2011 1 次提交
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由 johnc 提交于
Summary: 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
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- 12 8月, 2011 1 次提交
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由 tonyp 提交于
Summary: Refactor the allocation code during GC to use the G1AllocRegion abstraction. Use separate subclasses of G1AllocRegion for survivor and old regions. Avoid BOT updates and dirty survivor cards incrementally for the former. Reviewed-by: brutisso, johnc, ysr
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- 19 11月, 2011 1 次提交
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由 johnc 提交于
Summary: Various cleanups and formatting changes identified during a code walk through of the changes for 6484965 ("G1: piggy-back liveness accounting phase on marking"). Reviewed-by: brutisso, tonyp
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- 15 6月, 2011 1 次提交
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由 johnc 提交于
Summary: Perform a heap verification after the first phase of G1's full GC using objects' mark words to determine liveness. The third parameter of the heap verification routines, which was used in G1 to determine which marking bitmap to use in liveness calculations, has been changed from a boolean to an enum with values defined for using the mark word, and the 'prev' and 'next' bitmaps. Reviewed-by: tonyp, ysr
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- 11 6月, 2011 1 次提交
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由 tonyp 提交于
7042285: G1: native memory leak during humongous object allocation 6804436: G1: heap region indices should be size_t Summary: A series of fixes and improvements to the HeapRegionSeq class: a) replace the _regions growable array with a standard C array, b) avoid de-allocating / re-allocating HeapRegion instances when the heap shrinks / grows (fix for 7042285), c) introduce fast method to map address to HeapRegion via a "biased" array pointer, d) embed the _hrs object in G1CollectedHeap, instead of pointing to it via an indirection, e) assume that all the regions added to the HeapRegionSeq instance are contiguous, f) replace int's with size_t's for indexes (and expand that to HeapRegion as part of 6804436), g) remove unnecessary / unused methods, h) rename a couple of fields (_alloc_search_start and _seq_bottom), i) fix iterate_from() not to always start from index 0 irrespective of the region passed to it, j) add a verification method to check the HeapRegionSeq assumptions, k) always call the wrappers for _hrs.iterate(), _hrs_length(), and _hrs.at() from G1CollectedHeap, not those methods directly, and l) unify the code that expands the sequence (by either re-using or creating a new HeapRegion) and make it robust wrt to a HeapRegion allocation failing. Reviewed-by: stefank, johnc, brutisso
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- 30 4月, 2011 1 次提交
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由 tonyp 提交于
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) Summary: We should only undirty cards after we decide that they are not on a young region, not before. The fix also includes improvements to the verify_dirty_region() method which print out which cards were not found dirty. Reviewed-by: johnc, brutisso
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- 05 3月, 2011 1 次提交
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由 tonyp 提交于
Summary: Some G1 code cleanup. Reviewed-by: johnc, jcoomes, jwilhelm
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- 05 4月, 2011 1 次提交
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由 tonyp 提交于
Summary: Repurpose the existing flag G1PrintRegionLivenessInfo to print out the liveness distribution across the regions in the heap at the end of marking. Reviewed-by: iveresov, jwilhelm
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- 30 3月, 2011 1 次提交
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由 tonyp 提交于
7023151: G1: refactor the code that operates on _cur_alloc_region to be re-used for allocs by the GC threads 7018286: G1: humongous allocation attempts should take the GC locker into account Summary: First, this change replaces the asymmetric locking scheme in the G1 slow alloc path by a summetric one. Second, it factors out the code that operates on _cur_alloc_region so that it can be re-used for allocations by the GC threads in the future. Reviewed-by: stefank, brutisso, johnc
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- 20 1月, 2011 1 次提交
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由 tonyp 提交于
Summary: This changeset removes the zero-filling thread from G1 and collapses the two free region lists we had before (the "free" and "unclean" lists) into one. The new free list uses the new heap region sets / lists abstractions that we'll ultimately use it to keep track of all regions in the heap. A heap region set was also introduced for the humongous regions. Finally, this change increases the concurrency between the thread that completes freeing regions (after a cleanup pause) and the rest of the system (before we'd have to wait for said thread to complete before allocating a new region). The changest also includes a lot of refactoring and code simplification. Reviewed-by: jcoomes, johnc
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- 13 1月, 2011 2 次提交
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由 tonyp 提交于
Summary: First attempt to allocate out the current alloc region using a CAS instead of taking the Heap_lock (first level of G1's slow allocation path). Only if that fails and it's necessary to replace the current alloc region take the Heap_lock (that's the second level of G1's slow allocation path). Reviewed-by: johnc, brutisso, ysr
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由 tonyp 提交于
Summary: During evacuation failure handling we refine the BOT to reflect the location of all the objects in the regions we scan. The changeset includes some minor cleanup: a) non-product print_on() method on the G1 BOT class, b) added more complete BOT verification during heap / region verification, c) slight modification to the BOT set up for humongous regions to be more consistent with the BOT set up during evac failure handling, and d) removed a couple of unused methods. Reviewed-by: johnc, ysr
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- 24 11月, 2010 1 次提交
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由 stefank 提交于
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
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- 17 10月, 2010 1 次提交
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由 tonyp 提交于
Summary: There is a race between the concurrent refinement threads and the humongous object allocation that can cause the concurrent refinement threads to corrupt the part of the BOT that it is being initialized by the humongous object allocation operation. The solution is to do the humongous object allocation in careful steps to ensure that the concurrent refinement threads always have a consistent view over the BOT, region contents, and top. The fix includes some very minor tidying up in sparsePRT. Reviewed-by: jcoomes, johnc, ysr
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- 20 7月, 2010 1 次提交
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由 johnc 提交于
Summary: During concurrent refinment, filter cards in young regions after it has been determined that the region has been allocated from and the young type of the region has been set. Reviewed-by: iveresov, tonyp, jcoomes
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- 28 5月, 2010 1 次提交
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由 trims 提交于
Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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- 23 4月, 2010 1 次提交
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由 johnc 提交于
6871109: G1: remove the concept of the scan only prefix Summary: Removed scan only regions and associated code. The young portion of the collection set is now constructed incrementally - when a young region is retired as the current allocation region it is added to the collection set. Reviewed-by: apetrusenko, iveresov, tonyp
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- 06 10月, 2009 1 次提交
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由 tonyp 提交于
Summary: When we copy objects to survivors during marking, we incorrectly set NTAMS to bottom, which causes marking to miss visiting some of those objects. Reviewed-by: apetrusenko, iveresov
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- 03 10月, 2009 1 次提交
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由 tonyp 提交于
Summary: It tidies up the G1 heap verification a bit. In particular, when the verification is done in parallel and there is a failure, this is propagated to the top level and the heap is dumped at the end, not by every thread that encounters a failure. Reviewed-by: johnc, jmasa
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- 31 7月, 2009 1 次提交
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由 tonyp 提交于
Summary: Instead of the region size being hard-coded, allow the user to set it. Reviewed-by: jmasa, johnc, apetrusenko
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- 13 6月, 2009 1 次提交
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由 tonyp 提交于
Summary: extend G1 marking verification to use either the "prev" or "next" marking information, as appropriate. Reviewed-by: johnc, ysr
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- 19 5月, 2009 1 次提交
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由 apetrusenko 提交于
Reviewed-by: iveresov, tonyp
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- 26 3月, 2009 1 次提交
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由 apetrusenko 提交于
Reviewed-by: iveresov, tonyp
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- 10 3月, 2009 2 次提交
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由 apetrusenko 提交于
Reviewed-by: iveresov, tonyp
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由 xdono 提交于
Summary: Update copyright for files that have been modified in 2009, up to 03/09 Reviewed-by: katleman, tbell, ohair
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- 10 2月, 2009 1 次提交
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由 apetrusenko 提交于
Reviewed-by: tonyp
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- 06 2月, 2009 1 次提交
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由 apetrusenko 提交于
6797754: G1: combined bugfix Summary: Implemented a policy to control G1 survivor space parameters. Reviewed-by: tonyp, iveresov
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- 16 12月, 2008 1 次提交
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由 xdono 提交于
Summary: Update copyright for files that have been modified starting July 2008 to Dec 2008 Reviewed-by: katleman, ohair, tbell
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- 07 10月, 2008 1 次提交
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由 tonyp 提交于
Summary: Introduce parallel heap verification in G1. Reviewed-by: jcoomes, apetrusenko
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- 06 8月, 2008 1 次提交
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由 tonyp 提交于
Summary: Under certain circumstances, two cleanup threads can claim and process the same region. Reviewed-by: apetrusenko, ysr
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