hg: hsx/hotspot-gc/hotspot: 7132029: G1: mixed GC phase lasts for longer than it should

[tony.printezis at oracle.com]

Changeset: a9647476d1a4
Author:    tonyp
Date:      2012-02-15 13:06 -0500
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/a9647476d1a4

7132029: G1: mixed GC phase lasts for longer than it should
Summary: Revamp of the mechanism that chooses old regions for inclusion in the CSet. It simplifies the code and introduces min and max bounds on the number of old regions added to the CSet at each mixed GC to avoid pathological cases. It also ensures that when we do a mixed GC we'll always find old regions to add to the CSet (i.e., it eliminates the case where a mixed GC will collect no old regions which can happen today).
Reviewed-by: johnc, brutisso

! src/share/vm/gc_implementation/g1/collectionSetChooser.cpp
! src/share/vm/gc_implementation/g1/collectionSetChooser.hpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
! src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
! src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp
! src/share/vm/gc_implementation/g1/g1ErgoVerbose.hpp
! 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