- 25 6月, 2011 1 次提交
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由 tonyp 提交于
Summary: Extend and make more consistent the output from the G1PrintHeapRegions flag. Reviewed-by: johnc, jmasa
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- 22 6月, 2011 1 次提交
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由 tonyp 提交于
Summary: Remove two unnecessary iterations over the collection set which are supposed to prepare the RSet's of the CSet regions for parallel iterations (we'll make sure this is done incrementally). I'll piggyback on this CR the removal of the G1_REM_SET_LOGGING code. Reviewed-by: brutisso, johnc
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- 17 6月, 2011 1 次提交
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由 tonyp 提交于
Summary: Remove two unused parameters from the mem_allocate() method and update its uses accordingly. Reviewed-by: stefank, johnc
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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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- 09 6月, 2011 1 次提交
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由 tonyp 提交于
Summary: This changeset extends the logging information generated by +PrintGCDetails to also print out separate size transitions for the eden, survivors, and old regions. Reviewed-by: ysr, brutisso
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- 04 5月, 2011 1 次提交
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由 jmasa 提交于
Summary: Implement a more accurate is_scavengable() Reviewed-by: stefank, jcoomes, ysr
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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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- 22 4月, 2011 1 次提交
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由 jmasa 提交于
Summary: Added counters for jstat Reviewed-by: tonyp, jwilhelm, stefank, ysr, johnc
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- 20 4月, 2011 1 次提交
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由 tonyp 提交于
Summary: It introduces non-product cmd line parameter G1DummyRegionsPerGC which indicates how many "dummy" regions to allocate at the end of each GC. This allows the G1 heap to grow artificially and makes concurrent marking cycles more frequent irrespective of what the application that is running is doing. The dummy regions will be found totally empty during cleanup so this parameter can also be used to stress the concurrent cleanup operation. Reviewed-by: brutisso, johnc
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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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- 01 3月, 2011 1 次提交
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由 johnc 提交于
Summary: Make the G1 specific version of is_in_closed_subset() available in all builds. Reviewed-by: tonyp, jcoomes
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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 2 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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由 tonyp 提交于
Summary: What the synopsis says. Reviewed-by: jwilhelm, iveresov, johnc
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- 03 2月, 2011 1 次提交
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由 johnc 提交于
7007446: G1: expand the heap with a single step, not one region at a time Summary: Changed G1CollectedHeap::expand() to expand the committed space by calling VirtualSpace::expand_by() once rather than for every region in the expansion amount. This allows the success or failure of the expansion to be determined before creating any heap regions. Introduced a develop flag G1ExitOnExpansionFailure (false by default) that, when true, will exit the VM if the expansion of the committed space fails. Finally G1CollectedHeap::expand() returns a status back to it's caller so that the caller knows whether to attempt the allocation. Reviewed-by: brutisso, tonyp
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- 26 1月, 2011 1 次提交
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由 tonyp 提交于
Summary: A race between the concurrent cleanup thread and the VM thread while it is processing the "expanded sparse table list" causes both threads to try to free the same sparse table entry and either causes one of the threads to fail or leaves the entry in an inconsistent state. The solution is purge all entries on the expanded list that correspond go regions that are being cleaned up. Reviewed-by: 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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- 18 12月, 2010 1 次提交
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由 johnc 提交于
Summary: Initialize the _is_alive_non_header field of G1's reference processor with an instance of the G1CMIsAliveClosure. This will stop adding reference objects with live referents to the discovered reference lists unnecessarily. Reviewed-by: tonyp, ysr, jwilhelm, brutisso
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- 15 12月, 2010 1 次提交
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由 tonyp 提交于
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1) Summary: The concurrent marking thread can complete its operation and increment the full GC counter during a Full GC. This causes the nesting of increments to the start and end of Full GCs that we are expecting to be wrong. the fix is for the marking thread to join the suspendible thread set before incrementing the counter so that it's blocked until the Full GC (or any other safepoint) is finished. The change also includes some minor code cleanup (I renamed a parameter). Reviewed-by: brutisso, ysr
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- 08 12月, 2010 1 次提交
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由 tonyp 提交于
Summary: Allow the eden to the expanded up to a point when the GC locker is active. Reviewed-by: jwilhelm, johnc, ysr, jcoomes
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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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- 14 10月, 2010 1 次提交
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由 tonyp 提交于
Summary: When an entry is stolen, don't push it on the task queue but process it directly. Reviewed-by: iveresov, ysr, jcoomes
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- 13 10月, 2010 1 次提交
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由 jcoomes 提交于
Reviewed-by: iveresov, tonyp
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- 29 9月, 2010 1 次提交
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由 jcoomes 提交于
6942771: SEGV in ParScanThreadState::take_from_overflow_stack Reviewed-by: apetrusenko, ysr, pbk
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- 21 9月, 2010 1 次提交
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由 jmasa 提交于
Summary: Associate number of GC workers with the workgang as opposed to the task. Reviewed-by: johnc, ysr
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- 25 8月, 2010 1 次提交
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由 tonyp 提交于
Summary: This change revamps the slow allocation path of G1. Improvements include the following: a) Allocations directly to old regions are now totally banned. G1 now only allows allocations out of young regions (with the only exception being humongous regions). b) The thread that allocates a new region (which is now guaranteed to be young) does not dirty all its cards. Each thread that successfully allocates out of a young region is now responsible for dirtying the cards that corresponding to the "block" that just got allocated. c) allocate_new_tlab() and mem_allocate() are now implemented differently and TLAB allocations are only done by allocate_new_tlab(). d) If a thread schedules an evacuation pause in order to satisfy an allocation request, it will perform the allocation at the end of the safepoint so that the thread that initiated the GC also gets "first pick" of any space made available by the GC. e) If a thread is unable to allocate a humongous object it will schedule an evacuation pause in case it reclaims enough regions so that the humongous allocation can be satisfied aftewards. f) The G1 policy is more careful to set the young list target length to be the survivor number +1. g) Lots of code tidy up, removal, refactoring to make future changes easier. Reviewed-by: johnc, ysr
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- 18 8月, 2010 1 次提交
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由 tonyp 提交于
Summary: as the title says, sometimes we are allocating humongous objects in young regions and we shouldn't. Reviewed-by: ysr, johnc
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- 09 8月, 2010 1 次提交
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由 jcoomes 提交于
Reviewed-by: tonyp, ysr
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- 03 8月, 2010 1 次提交
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由 johnc 提交于
Summary: The per-worker _new_refs array is used to hold references that point into the collection set. It is populated during RSet updating and subsequently processed. In the event of an evacuation failure it processed again to recreate the RSets of regions in the collection set. Remove the per-worker _new_refs array by processing the references directly. Use a DirtyCardQueue to hold the cards containing the references so that the RSets of regions in the collection set can be recreated when handling an evacuation failure. Reviewed-by: iveresov, jmasa, tonyp
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- 29 6月, 2010 1 次提交
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由 tonyp 提交于
Summary: G1 was not handling explicit GCs correctly in many ways. It does now. See the CR for the list of improvements contained in this changeset. Reviewed-by: iveresov, ysr, johnc
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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 2 次提交
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由 tonyp 提交于
Summary: Small improvements to G1's PrintGCDetails output. It also includes minor formatting details. Reviewed-by: ysr, johnc
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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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- 16 4月, 2010 1 次提交
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由 apetrusenko 提交于
Summary: Replaces the G1-specific parameter with the existing ones that are used by the other GCs (YoungPLABSize and OldPLABSize) Reviewed-by: tonyp, johnc
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- 12 3月, 2010 1 次提交
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由 johnc 提交于
Summary: A TLAB became large enough to be considered a humongous object allowing multiple objects to be allocated in a humongous region, which violates a basic assumption about humongous regions. The changes ensure that TLABs cannot be regarded as humongous. Reviewed-by: iveresov, tonyp
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- 04 3月, 2010 1 次提交
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由 jcoomes 提交于
Summary: Use an explicit stack for object arrays and process them in chunks. Reviewed-by: iveresov, apetrusenko
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- 12 2月, 2010 1 次提交
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由 iveresov 提交于
Summary: Implemented block-based work stealing. Moved copying during the rset scanning phase to the main copying phase. Made the size of rset table depend on the region size. Reviewed-by: apetrusenko, tonyp
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