hg: jdk9/hs-gc/hotspot: 3 new changesets

[thomas.schatzl at oracle.com]

Changeset: 893ce66f7473
Author:    tschatzl
Date:      2014-01-20 11:47 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/893ce66f7473

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: a2866d45e99e
Author:    tschatzl
Date:      2014-01-20 11:47 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/a2866d45e99e

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: c685ef164975
Author:    tschatzl
Date:      2014-01-20 11:47 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/c685ef164975

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