hg: jdk8u/hs-dev/hotspot: 3 new changesets

[thomas.schatzl at oracle.com]

Changeset: e3ed86fc15ed
Author:    tschatzl
Date:      2014-09-29 09:59 +0200
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/e3ed86fc15ed

8043766: CMM Testing: 8u40 Decommit auxiliary data structures
Summary: Check that native memory is returned to the system when decommiting memory within the heap with G1.
Reviewed-by: tschatzl, jwilhelm
Contributed-by: Andrey Zakharov <andrey.x.zakharov at oracle.com>

! test/TEST.groups
+ test/gc/g1/TestShrinkAuxiliaryData.java
+ test/gc/g1/TestShrinkAuxiliaryData00.java
+ test/gc/g1/TestShrinkAuxiliaryData05.java
+ test/gc/g1/TestShrinkAuxiliaryData10.java
+ test/gc/g1/TestShrinkAuxiliaryData15.java
+ test/gc/g1/TestShrinkAuxiliaryData20.java
+ test/gc/g1/TestShrinkAuxiliaryData25.java
+ test/gc/g1/TestShrinkAuxiliaryData30.java

Changeset: 0fcaab91d485
Author:    brutisso
Date:      2014-10-10 15:45 +0200
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/0fcaab91d485

8055816: Remove dead code in g1BlockOffsetTable
Reviewed-by: tschatzl, mgerdin

! src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp
! src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp
! src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp
! src/share/vm/gc_implementation/g1/heapRegion.cpp
! src/share/vm/gc_implementation/g1/heapRegion.hpp

Changeset: e7d0505c8a30
Author:    tschatzl
Date:      2014-10-10 15:51 +0200
URL:       http://hg.openjdk.java.net/jdk8u/hs-dev/hotspot/rev/e7d0505c8a30

8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso

! src/share/vm/gc_implementation/g1/concurrentMark.cpp
! src/share/vm/gc_implementation/g1/concurrentMark.hpp
! src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp
! src/share/vm/gc_implementation/g1/g1CardCounts.cpp
! src/share/vm/gc_implementation/g1/g1CardCounts.hpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1RegionToSpaceMapper.cpp
! src/share/vm/gc_implementation/g1/g1RegionToSpaceMapper.hpp
! src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp
! src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp