hg: shenandoah/jdk10: Record cycle start/end in Traversal GC to avoid continuous periodic GC

[roman at kennke.org]

Changeset: 4302f08acccb
Author:    rkennke
Date:      2018-02-02 14:59 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/rev/4302f08acccb

Record cycle start/end in Traversal GC to avoid continuous periodic GC

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentThread.cpp
! src/hotspot/share/gc/shenandoah/shenandoahUtils.cpp