Webrev at: http://cr.openjdk.java.net/~mchung/jdk8/webrevs/8028647/webrev.00/
This patch turns the trace on by default and also add the instrumentation to print the safepoint count to help troubleshooting the test failure.
test/sun/management/HotspotRuntimeMBean/GetSafepointSyncTime.java is no longer reproducible on jdk8 b109. GetSafepointSyncTime.java should be removed from the ProblemList.txt. This still fails with 7u45 and so I want to backport this change to 7u-dev. There might be a hotspot fix in jdk8 that resolves the zero safepoint sync time issue for further investigation.
thanks Mandy
