hg: jdk/jdk: 8224185: ZGC: Introduce "High Usage" rule

[per.liden at oracle.com]

Changeset: da9840e2f7da
Author:    pliden
Date:      2019-05-23 08:09 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/da9840e2f7da

8224185: ZGC: Introduce "High Usage" rule
Reviewed-by: eosterlund

! src/hotspot/share/gc/shared/gcCause.cpp
! src/hotspot/share/gc/shared/gcCause.hpp
! src/hotspot/share/gc/z/zDirector.cpp
! src/hotspot/share/gc/z/zDirector.hpp
! src/hotspot/share/gc/z/zDriver.cpp
+ test/hotspot/jtreg/gc/z/TestHighUsage.java