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List:       openjdk-hotspot-gc-dev
Subject:    hg: jdk7/hotspot-gc/hotspot: 6692906: CMS: parallel concurrent marking may be prone to hanging or st
From:       y.s.ramakrishna () oracle ! com (y ! s ! ramakrishna at oracle ! com)
Date:       2010-09-30 9:08:44
Message-ID: 20100930090847.8CB8B47D56 () hg ! openjdk ! java ! net
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Changeset: c99c53f07c14
Author:    ysr
Date:      2010-09-29 16:17 -0700
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/c99c53f07c14

6692906: CMS: parallel concurrent marking may be prone to hanging or stalling \
                mutators for periods of time
Summary: Inserted missing yield(check)s in closures used during the work-stealing \
phase of parallel concurrent marking, a missing synchronous yield-request in the cms \
perm gen allocation path, and a terminator-terminator for the offer_termination \
invocation that monitors the yield status of the concurrent marking task. Elaborated \
some documentation comments and made some task queue termination loop flags \
                configurable at start-up to aid debugging in the field.
Reviewed-by: jmasa, johnc, poonam

! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp
                
! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp
! src/share/vm/runtime/globals.hpp
! src/share/vm/utilities/yieldingWorkgroup.hpp


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