hg: jdk7/hotspot-gc/hotspot: 6631166: CMS: better heuristics when combatting fragmentation

Y. Srinivas Ramakrishna Y.S.Ramakrishna at Sun.COM
Wed Dec 23 21:27:51 PST 2009


The changeset were also reviewed by Yumin Qi (minqi).

-- ramki

Y.S.Ramakrishna at Sun.COM wrote:
> Changeset: e018e6884bd8
> Author:    ysr
> Date:      2009-12-23 09:23 -0800
> URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/e018e6884bd8
> 
> 6631166: CMS: better heuristics when combatting fragmentation
> Summary: Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking.
> Reviewed-by: jmasa
> 
> ! src/share/vm/gc_implementation/concurrentMarkSweep/binaryTreeDictionary.cpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/binaryTreeDictionary.hpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.cpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/freeBlockDictionary.hpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.hpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/freeList.cpp
> ! src/share/vm/gc_implementation/concurrentMarkSweep/freeList.hpp
> ! src/share/vm/gc_implementation/includeDB_gc_concurrentMarkSweep
> ! src/share/vm/gc_implementation/includeDB_gc_serial
> ! src/share/vm/gc_implementation/parNew/parNewGeneration.cpp
> ! src/share/vm/gc_implementation/parNew/parNewGeneration.hpp
> ! src/share/vm/gc_implementation/shared/allocationStats.hpp
> ! src/share/vm/gc_implementation/shared/gcUtil.cpp
> ! src/share/vm/gc_implementation/shared/gcUtil.hpp
> ! src/share/vm/includeDB_gc_parallel
> ! src/share/vm/memory/defNewGeneration.cpp
> ! src/share/vm/memory/generation.hpp
> ! src/share/vm/runtime/arguments.cpp
> ! src/share/vm/runtime/globals.hpp
> ! src/share/vm/services/classLoadingService.cpp
> 



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