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

y.s.ramakrishna at sun.com y.s.ramakrishna at sun.com
Wed Dec 23 17:26:05 PST 2009


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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