hg: jdk9/hs/hotspot: 8159422: Very high Concurrent Mark mark stack contention

[thomas.schatzl at oracle.com]

Changeset: 27d09549c47b
Author:    tschatzl
Date:      2016-09-15 16:44 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/27d09549c47b

8159422: Very high Concurrent Mark mark stack contention
Summary: Decrease contention on mark stack by splitting locks, and minimizing the amount of time these locks are held. Improve mark stack management.
Reviewed-by: kbarrett, mgerdin, eosterlund

! src/share/vm/gc/g1/g1CollectedHeap.cpp
! src/share/vm/gc/g1/g1ConcurrentMark.cpp
! src/share/vm/gc/g1/g1ConcurrentMark.hpp
! src/share/vm/gc/g1/g1ConcurrentMark.inline.hpp
! src/share/vm/gc/g1/g1OopClosures.hpp
! src/share/vm/memory/allocation.hpp
! src/share/vm/memory/allocation.inline.hpp
! src/share/vm/runtime/mutexLocker.cpp
! src/share/vm/runtime/mutexLocker.hpp