- 25 6月, 2011 1 次提交
-
-
由 tonyp 提交于
Summary: Extend and make more consistent the output from the G1PrintHeapRegions flag. Reviewed-by: johnc, jmasa
-
- 22 6月, 2011 1 次提交
-
-
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
-
- 17 6月, 2011 1 次提交
-
-
由 tonyp 提交于
Summary: Remove two unused parameters from the mem_allocate() method and update its uses accordingly. Reviewed-by: stefank, johnc
-
- 15 6月, 2011 1 次提交
-
-
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
-
- 11 6月, 2011 1 次提交
-
-
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
-
- 09 6月, 2011 1 次提交
-
-
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
-
- 17 5月, 2011 1 次提交
-
-
由 johnc 提交于
Summary: During an evacuation pause clear the region fields of any concurrent marking task whose local finger points into the collection set as the values in the region fields will become stale. Clearing these fields causes the concurrent mark task to claim a new region when marking restarts after the pause. Reviewed-by: tonyp, iveresov
-
- 13 5月, 2011 1 次提交
-
-
由 fparain 提交于
Summary: Add a notification to the GarbageCollectorMXBeans Reviewed-by: acorn, mchung
-
- 05 5月, 2011 1 次提交
-
-
由 tonyp 提交于
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ... Summary: There is a race in the evac failure handling code that causes the condition the assert checks not to be true. The fix is to replace the too-strong assert with a more targeted one. Reviewed-by: johnc, ysr, jcoomes
-
- 04 5月, 2011 1 次提交
-
-
由 jmasa 提交于
Summary: Implement a more accurate is_scavengable() Reviewed-by: stefank, jcoomes, ysr
-
- 30 4月, 2011 1 次提交
-
-
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
-
- 27 4月, 2011 1 次提交
-
-
由 ysr 提交于
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap. Reviewed-by: iveresov, jmasa, tonyp
-
- 22 4月, 2011 1 次提交
-
-
由 jmasa 提交于
Summary: Added counters for jstat Reviewed-by: tonyp, jwilhelm, stefank, ysr, johnc
-
- 20 4月, 2011 1 次提交
-
-
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
-
- 18 3月, 2011 1 次提交
-
-
由 ysr 提交于
Summary: 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
-
- 05 3月, 2011 1 次提交
-
-
由 tonyp 提交于
Summary: Some G1 code cleanup. Reviewed-by: johnc, jcoomes, jwilhelm
-
- 01 3月, 2011 1 次提交
-
-
由 johnc 提交于
Summary: Make the G1 specific version of is_in_closed_subset() available in all builds. Reviewed-by: tonyp, jcoomes
-
- 30 3月, 2011 2 次提交
-
-
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
-
由 tonyp 提交于
Summary: What the synopsis says. Reviewed-by: jwilhelm, iveresov, johnc
-
- 03 2月, 2011 1 次提交
-
-
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
-
- 26 1月, 2011 1 次提交
-
-
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
-
- 20 1月, 2011 1 次提交
-
-
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
-
- 13 1月, 2011 3 次提交
-
-
由 brutisso 提交于
Summary: Pass the value of UseLargePages instead of false as the "large" parameter when reserving the G1 heap. Reviewed-by: tonyp, johnc, phh
-
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
-
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
-
- 11 1月, 2011 1 次提交
-
-
由 kamg 提交于
Summary: Make JvmtiGCMark safe to run non-safepoint and instrument CMS Reviewed-by: ysr, dcubed
-
- 20 12月, 2010 1 次提交
-
-
由 tonyp 提交于
Summary: Fire the gc-begin and gc-end probes for G1. Reviewed-by: kamg, ysr, jcoomes
-
- 18 12月, 2010 2 次提交
-
-
由 ysr 提交于
Summary: Age bits need not enter the mark-word preservation calculus; also affected, in addition to CMS, per CR synopsis above, were ParNew (but not DefNew), ParallelScavenge and G1, albeit to a lesser degree than CMS. Reviewed-by: tonyp, johnc
-
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
-
- 15 12月, 2010 1 次提交
-
-
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
-
- 10 12月, 2010 1 次提交
-
-
由 ysr 提交于
Summary: Relaxed the assert by allowing NULL referents when discovery may be concurrent. Reviewed-by: johnc, jcoomes
-
- 08 12月, 2010 1 次提交
-
-
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
-
- 03 12月, 2010 1 次提交
-
-
由 tonyp 提交于
Summary: Wrong assumption about expecting the current alloc region expected to be NULL in expand_and_allocate(). Reviewed-by: brutisso, ysr
-
- 02 12月, 2010 1 次提交
-
-
由 johnc 提交于
Summary: Enable reference discovery during concurrent marking by setting the reference processor field of the concurrent marking closure. Keep reference objects on the discovered reference lists alive during incremental evacuation pauses until they are processed at the end of concurrent marking. Reviewed-by: ysr, tonyp
-
- 24 11月, 2010 1 次提交
-
-
由 stefank 提交于
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
-
- 17 11月, 2010 1 次提交
-
-
由 johnc 提交于
Summary: An evacuation failure while copying the roots caused an object, A, to be forwarded to itself. During the subsequent RSet updating a reference to A was processed causing the reference to be added to the RSet of A's heap region. As a result of adding to the remembered set we ran into the issue described in 6930581 - the sparse table expanded and the RSet scanning code walked the cards in one instance of RHashTable (_cur) while the occupied() counts the cards in the expanded table (_next). Reviewed-by: tonyp, iveresov
-
- 14 10月, 2010 1 次提交
-
-
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
-
- 13 10月, 2010 2 次提交
- 02 10月, 2010 1 次提交
-
-
由 johnc 提交于
Summary: Clear the concurrent marking "in progress" flag while the FullGCCount_lock is held. This avoids a race that can cause back to back System.gc() calls, when ExplicitGCInvokesConcurrent is enabled, to fail to initiate a marking cycle causing the requesting thread to hang. Reviewed-by: tonyp, ysr
-