Long TTSP

José Muñoz jmu at activeviam.com
Wed May 3 17:01:40 UTC 2017


Hi,

I'm analyzing the performance of a VM with heap of 160g and I see TTSP of
up to 2 seconds.

I added some flags to get more information:

-XX:+PrintSafepointStatistics
-XX:+SafepointTimeout
-XX:SafepointTimeoutDelay=1000
-XX:PrintSafepointStatisticsTimeout=1000
-XX:PrintSafepointStatisticsCount=1

but I couldn't find any flag to print the stack trace of a thread that is
executed when it fails to reach the safepoint after the delay. I would like
to find a way to figure out which code is executed when a thread reached
the TTSP threshold ?

Thanks,
Jose
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