hg: jdk9/hs-gc/hotspot: 8048179: Early reclaim of large objects that are referenced by a few objects

[thomas.schatzl at oracle.com]

Changeset: 354d56cd6eb2
Author:    tschatzl
Date:      2015-01-07 15:15 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/354d56cd6eb2

8048179: Early reclaim of large objects that are referenced by a few objects
Summary: Push the remembered sets of large objects with few referenced into the dirty card queue at the beginning of the evacuation so that they may end up with zero remembered set entries at the end of the collection, and are potentially reclaimed. Also improve timing measurements of the early reclaim mechanism, and shorten flag names.
Reviewed-by: brutisso, jmasa, dfazunen

! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp
! src/share/vm/gc_implementation/g1/g1GCPhaseTimes.hpp
! src/share/vm/gc_implementation/g1/g1_globals.hpp
! src/share/vm/gc_implementation/g1/heapRegionRemSet.cpp
! src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp
- test/gc/g1/TestEagerReclaimHumongousRegions2.java
+ test/gc/g1/TestEagerReclaimHumongousRegionsClearMarkBits.java
+ test/gc/g1/TestEagerReclaimHumongousRegionsWithRefs.java
+ test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java
- test/gc/g1/TestG1TraceReclaimDeadHumongousObjectsAtYoungGC.java
! test/gc/g1/TestGCLogMessages.java