negative pause times

Y. Srinivas Ramakrishna y.s.ramakrishna at oracle.com
Mon Aug 30 11:28:40 PDT 2010


Angelika Langer wrote:
> Hi!
> 
> Does anybody know off hand why the G1 log file shows negative pause times?
> 
> 
> 222.121: [GC pause (young) 561M->528M(1005M), 0.0586070 secs]
> 222.915: [GC pause (young) 576M->540M(1005M), 0.0447820 secs]
> 223.763: [GC pause (young) 602M->562M(1005M), -0.7354870 secs]  <=======
> 225.572: [GC pause (young) 772M->632M(1005M), 0.0719350 secs]
> 

Is this on Linux? Are you running NTP or otherwise causing TOD to
be adjusted? (you might want to turn off NTP if the negative times
bother you.) Are you running on VMware? (try a non-virtualized
run to see if the problem reproduces.) The negative pause times
we have seen in the past have usually been related to one of the
other of the above.

Please file a formal bug using your support credentials should
you believe this is an issue that needs delving deeper, especially
if you have a usable test case.

thanks.
-- ramki


> 
> Thanks
> Angelika Langer
> 
> 
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