- 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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- 05 1月, 2012 1 次提交
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由 tonyp 提交于
Summary: Introduce a flag that is set when a heap expansion attempt during a GC fails so that we do not consantly attempt to expand the heap when it's going to fail anyway. This not only prevents the excessive ergo output (which is generated when a region allocation fails) but also avoids excessive and ultimately unsuccessful expansion attempts. Reviewed-by: jmasa, johnc
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- 15 12月, 2011 2 次提交
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由 johnc 提交于
Summary: Cache workers' calculated starting heap region, used for parallel iteration over the collcection set, for subsequent reuse. Reviewed-by: tonyp, brutisso
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由 jmasa 提交于
Summary: Change variables representing the number of GC workers to uint from int and size_t. Change the parameter in work(int i) to work(uint worker_id). Reviewed-by: brutisso, tonyp
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- 14 12月, 2011 1 次提交
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由 stefank 提交于
Summary: Fixed G1CollectedHeap::is_in, added tests, cleaned up comments and made Space::is_in pure virtual. Reviewed-by: brutisso, tonyp, jcoomes
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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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- 08 11月, 2011 2 次提交
- 28 9月, 2011 1 次提交
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由 brutisso 提交于
Summary: Remove the extra guard to allow G1 to use ReduceInitialCardMarks Reviewed-by: jmasa, tonyp, johnc, ysr
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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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- 21 9月, 2011 1 次提交
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由 johnc 提交于
Summary: As a result of the changes for 7080389, an evacuation failure during an initial mark pause may result in some root objects not being marked. Pass whether the caller is a root scanning closure into the evacuation failure handling code so that the thread that successfully forwards an object to itself also marks the object. Reviewed-by: ysr, brutisso, tonyp
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- 30 8月, 2011 1 次提交
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由 johnc 提交于
Summary: Refactor code marking code in the evacuation pause copy closures so that an evacuated object is only marked by the thread that successfully copies it. Reviewed-by: stefank, brutisso, tonyp
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- 19 8月, 2011 1 次提交
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由 brutisso 提交于
Summary: Removed the possibility to turn off generational mode for G1. Reviewed-by: johnc, ysr, 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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- 10 8月, 2011 1 次提交
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由 jmasa 提交于
Summary: Select number of GC threads dynamically based on heap usage and number of Java threads Reviewed-by: johnc, ysr, jcoomes
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- 19 11月, 2011 1 次提交
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由 tonyp 提交于
Summary: Major cleanup of the G1CollectorPolicy class. It removes a lot of unused fields and methods and also consolidates replicated information (mainly various ways of counting the number of CSet regions) into one copy. Reviewed-by: johnc, brutisso
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- 02 8月, 2011 1 次提交
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由 johnc 提交于
Summary: In root processing, move the scanning of the reference processor's discovered lists to before RSet updating and scanning. When scanning the reference processor's discovered lists, use a buffering closure so that the time spent copying any reference object is correctly attributed. Also removed a couple of unused and irrelevant timers. Reviewed-by: ysr, jmasa
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- 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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