johnc [Sat, 14 Aug 2010 00:47:52 -0700] rev 6255
Merge
jcoomes [Wed, 11 Aug 2010 13:12:28 -0700] rev 6254
6976378: ParNew: stats are printed unconditionally in debug builds
Reviewed-by: tonyp
ysr [Tue, 10 Aug 2010 14:53:35 -0700] rev 6253
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
jcoomes [Mon, 09 Aug 2010 18:03:50 -0700] rev 6252
6970376: ParNew: shared TaskQueue statistics
Reviewed-by: ysr
jcoomes [Mon, 09 Aug 2010 05:41:05 -0700] rev 6251
6966222: G1: simplify TaskQueue overflow handling
Reviewed-by: tonyp, ysr
johnc [Fri, 06 Aug 2010 10:17:21 -0700] rev 6250
6930581: G1: assert(ParallelGCThreads > 1 || n_yielded() == _hrrs->occupied(),"Should have yielded all the ..
Summary: During RSet updating, when ParallelGCThreads is zero, references that point into the collection set are added directly the referenced region's RSet. This can cause the sparse table in the RSet to expand. RSet scanning and the "occupied" routine will then operate on different instances of the sparse table causing the assert to trip. This may also cause some cards added post expansion to be missed during RSet scanning. When ParallelGCThreads is non-zero such references are recorded on the "references to be scanned" queue and the card containing the reference is recorded in a dirty card queue for use in the event of an evacuation failure. Employ the parallel code in the serial case to avoid expanding the RSets of regions in the collection set.
Reviewed-by: iveresov, ysr, tonyp
tonyp [Wed, 04 Aug 2010 13:03:23 -0400] rev 6249
6963209: G1: remove the concept of abandoned pauses
Summary: As part of 6944166 we disabled the concept of abandoned pauses (i.e., if the collection set is empty, we would still try to do a pause even if it is to update the RSets and scan the roots). This changeset removes the code and structures associated with abandoned pauses.
Reviewed-by: iveresov, johnc
tonyp [Thu, 22 Jul 2010 10:27:41 -0400] rev 6248
6962589: remove breadth first scanning code from parallel gc
Summary: Remove the breadth-first copying order from ParallelScavenge and use depth-first by default.
Reviewed-by: jcoomes, ysr, johnc
johnc [Mon, 02 Aug 2010 12:51:43 -0700] rev 6247
6814437: G1: remove the _new_refs array
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
kevinw [Sat, 31 Jul 2010 15:10:59 +0100] rev 6246
Merge
kevinw [Fri, 30 Jul 2010 22:43:50 +0100] rev 6245
6581734: CMS Old Gen's collection usage is zero after GC which is incorrect
Summary: Management code enabled for use by a concurrent collector.
Reviewed-by: mchung, ysr
cl [Wed, 08 Sep 2010 14:04:13 -0700] rev 6244
Merge