hg: jdk/sandbox: 8220151: SafepointTracing::end_of_last_safepoint_ms should return ms since epoch.

[chris.hegarty at oracle.com]

Changeset: 13acb4339895
Author:    rehn
Date:      2019-03-06 11:15 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/13acb4339895

8220151: SafepointTracing::end_of_last_safepoint_ms should return ms since epoch.
Reviewed-by: dholmes, redestad

! src/hotspot/share/runtime/safepoint.cpp
! src/hotspot/share/runtime/safepoint.hpp
! src/hotspot/share/runtime/tieredThresholdPolicy.cpp