hg: jdk8u/hs-dev/hotspot: 4 new changesets

[thomas.schatzl at oracle.com]

Changeset: 04f1d5d36714
Author:    tschatzl
Date:      2014-01-07 13:31 +0100
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/04f1d5d36714

8027364: PSScavenge accounts too large code section to StringTable unlink
Summary: Correct timing measurement by modifying the scope of the GCTraceTime instance.
Reviewed-by: ysr, tamao
Contributed-by: Jeremy Manson <jeremymanson at google.com>

! src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp

Changeset: 5a32d2a3cc1e
Author:    tschatzl
Date:      2014-01-20 11:47 +0100
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/5a32d2a3cc1e

8027476: Improve performance of Stringtable unlink
8027455: Improve symbol table scan times during gc pauses
Summary: Parallelize string table and symbol table scan during remark and full GC. Some additional statistics output if the experimental flag G1TraceStringSymbolTableScrubbing is set.
Reviewed-by: mgerdin, coleenp, brutisso

! src/share/vm/classfile/symbolTable.cpp
! src/share/vm/classfile/symbolTable.hpp
! src/share/vm/gc_implementation/g1/concurrentMark.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1MarkSweep.cpp
! src/share/vm/gc_implementation/g1/g1_globals.hpp
+ test/gc/g1/TestStringSymbolTableStats.java

Changeset: cb7ec2423207
Author:    tschatzl
Date:      2014-01-20 11:47 +0100
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/cb7ec2423207

8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark
Summary: Do not try to unlink string table entries unconditionally during remark. This is without side effects as the preceding initial mark always uses the string table as strong roots. Needs to be fixed with class unloading during concurrent mark.
Reviewed-by: brutisso, mgerdin

! src/share/vm/gc_implementation/g1/concurrentMark.cpp

Changeset: 889068b9a088
Author:    tschatzl
Date:      2014-01-20 11:47 +0100
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/889068b9a088

8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
Summary: Remove the above mentioned template parameter and related unused code. Also remove some classes that are never used.
Reviewed-by: stefank, mgerdin, jwilhelm

! src/share/vm/gc_implementation/g1/bufferingOopClosure.hpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1OopClosures.hpp
! src/share/vm/gc_implementation/g1/g1_specialized_oop_closures.hpp