hg: shenandoah/jdk9/hotspot: Mark scan prefetch: prefetch the oop contents while scanning the mark bitmap.

[ashipile at redhat.com]

Changeset: f0002694db11
Author:    shade
Date:      2016-11-08 15:50 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/f0002694db11

Mark scan prefetch: prefetch the oop contents while scanning the mark bitmap.

! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc/shenandoah/shenandoahHeap.inline.hpp
! src/share/vm/gc/shenandoah/shenandoah_globals.hpp