hg: hsx/hotspot-gc/hotspot: 8027675: Full collections with Serial slower in JDK 8 compared to 7u40

[mikael.gerdin at oracle.com]

Changeset: 55a0da3d420b
Author:    sjohanss
Date:      2013-11-26 14:35 +0100
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/55a0da3d420b

8027675: Full collections with Serial slower in JDK 8 compared to 7u40
Summary: Reduced the number of calls to follow_class_loader and instead marked and pushed the klass holder directly. Also removed unneeded calls to adjust_klass.
Reviewed-by: coleenp, jmasa, mgerdin, tschatzl

! src/share/vm/gc_implementation/shared/markSweep.cpp
! src/share/vm/gc_implementation/shared/markSweep.hpp
! src/share/vm/gc_implementation/shared/markSweep.inline.hpp
! src/share/vm/oops/instanceKlass.cpp
! src/share/vm/oops/instanceMirrorKlass.cpp
! src/share/vm/oops/objArrayKlass.cpp