hg: jdk/sandbox: 8242101: Shenandoah: coalesce and parallelise heap region walks during the pauses

[chris.hegarty at oracle.com]

Changeset: 8be363256518
Author:    shade
Date:      2020-04-03 16:13 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/8be363256518

8242101: Shenandoah: coalesce and parallelise heap region walks during the pauses
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp
! src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.hpp