hg: jdk7/hotspot/hotspot: 5 new changesets

[john.cuthbertson at oracle.com]

Changeset: 7e37af9d69ef
Author:    tonyp
Date:      2011-01-19 09:35 -0500
URL:       http://hg.openjdk.java.net/jdk7/hotspot/hotspot/rev/7e37af9d69ef

7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr

! src/share/vm/gc_implementation/g1/concurrentMark.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp
! src/share/vm/gc_implementation/g1/g1_globals.hpp
! src/share/vm/gc_implementation/g1/heapRegionSeq.hpp
! src/share/vm/gc_implementation/g1/ptrQueue.cpp
! src/share/vm/gc_implementation/g1/ptrQueue.hpp
! src/share/vm/gc_implementation/g1/satbQueue.cpp
! src/share/vm/gc_implementation/g1/satbQueue.hpp

Changeset: 182e9624aa42
Author:    johnc
Date:      2011-01-19 13:01 -0800
URL:       http://hg.openjdk.java.net/jdk7/hotspot/hotspot/rev/182e9624aa42

7012642: G1: JumbleGC002 test aborts with segmentation violation due to uncaught stack overflow
Summary: With recent G1 allocation path changes, the value of StackShadowPages in fast debug builds of the JVM, is no longer large enough to prevent the JVM C++ code from touching the stack guard pages. Increase the value of StackShadowPages to a suitable value.
Reviewed-by: ysr, tonyp, coleenp

! src/cpu/x86/vm/globals_x86.hpp

Changeset: cb913d743d09
Author:    johnc
Date:      2011-01-19 13:04 -0800
URL:       http://hg.openjdk.java.net/jdk7/hotspot/hotspot/rev/cb913d743d09

Merge


Changeset: 0fa27f37d4d4
Author:    tonyp
Date:      2011-01-19 19:30 -0500
URL:       http://hg.openjdk.java.net/jdk7/hotspot/hotspot/rev/0fa27f37d4d4

6977804: G1: remove the zero-filling thread
Summary: This changeset removes the zero-filling thread from G1 and collapses the two free region lists we had before (the "free" and "unclean" lists) into one. The new free list uses the new heap region sets / lists abstractions that we'll ultimately use it to keep track of all regions in the heap. A heap region set was also introduced for the humongous regions. Finally, this change increases the concurrency between the thread that completes freeing regions (after a cleanup pause) and the rest of the system (before we'd have to wait for said thread to complete before allocating a new region). The changest also includes a lot of refactoring and code simplification.
Reviewed-by: jcoomes, johnc

! src/share/vm/gc_implementation/g1/concurrentMark.cpp
! src/share/vm/gc_implementation/g1/concurrentMark.hpp
! src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp
- src/share/vm/gc_implementation/g1/concurrentZFThread.cpp
- src/share/vm/gc_implementation/g1/concurrentZFThread.hpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp
! src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
! src/share/vm/gc_implementation/g1/g1MarkSweep.cpp
! src/share/vm/gc_implementation/g1/g1_globals.hpp
! src/share/vm/gc_implementation/g1/heapRegion.cpp
! src/share/vm/gc_implementation/g1/heapRegion.hpp
! src/share/vm/gc_implementation/g1/heapRegionSeq.cpp
! src/share/vm/gc_implementation/g1/heapRegionSeq.hpp
+ src/share/vm/gc_implementation/g1/heapRegionSet.cpp
+ src/share/vm/gc_implementation/g1/heapRegionSet.hpp
+ src/share/vm/gc_implementation/g1/heapRegionSet.inline.hpp
+ src/share/vm/gc_implementation/g1/heapRegionSets.cpp
+ src/share/vm/gc_implementation/g1/heapRegionSets.hpp
! src/share/vm/runtime/mutexLocker.cpp
! src/share/vm/runtime/mutexLocker.hpp
! src/share/vm/utilities/debug.hpp
! src/share/vm/utilities/globalDefinitions.hpp

Changeset: 377371490991
Author:    johnc
Date:      2011-01-20 13:57 -0800
URL:       http://hg.openjdk.java.net/jdk7/hotspot/hotspot/rev/377371490991

Merge

- src/share/vm/gc_implementation/g1/concurrentZFThread.cpp
- src/share/vm/gc_implementation/g1/concurrentZFThread.hpp
! src/share/vm/gc_implementation/g1/g1MarkSweep.cpp