hg: hsx/hotspot-gc/hotspot: 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40

[jesper.wilhelmsson at oracle.com]

Changeset: ad72068ac41e
Author:    sjohanss
Date:      2013-12-10 10:31 +0100
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/ad72068ac41e

8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
Summary: Reducing the number of calls to follow_class_loader to speed up the marking phase. Also removed some unnecessary calls to adjust_klass.
Reviewed-by: stefank, jmasa, mgerdin

! src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
! src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp
! src/share/vm/oops/instanceClassLoaderKlass.cpp
! src/share/vm/oops/instanceKlass.cpp
! src/share/vm/oops/instanceMirrorKlass.cpp
! src/share/vm/oops/objArrayKlass.cpp
! src/share/vm/oops/oop.hpp
! src/share/vm/oops/oop.pcgc.inline.hpp