hg: jdk/sandbox: 8243489: Thread CPU Load event may contain wrong data for CPU time under certain conditions

[chris.hegarty at oracle.com]

Changeset: e7c08ffff4d9
Author:    jbachorik
Date:      2020-04-29 13:27 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/e7c08ffff4d9

8243489: Thread CPU Load event may contain wrong data for CPU time under certain conditions
Reviewed-by: jbachorik
Contributed-by: Nikolay Martynov <nikolay.martynov at datadoghq.com>

! src/hotspot/share/jfr/periodic/jfrThreadCPULoadEvent.cpp
! test/hotspot/gtest/jfr/test_threadCpuLoad.cpp