More PrintGCApplicationStoppedTime messages in Java 6

[Tony Printezis]

Rainer,

Which version of 5 were you using? They could be biased locking 
revocation safepoints. Try running with -XX:-UseBiasedLocking to see if 
they occur. Biased locking is an important and effective optimization in 
most cases and the extra safepoints that it causes are generally benign 
and nothing to worry about.

Tony

Rainer Jung wrote:
> Hi,
>
> the number of messages
>
> Total time for which application threads were stopped: X.Y seconds
>
> produced by PrintGCApplicationStoppedTime increased a lot between Java 5
> and 6. All of the additional messages refer to extremely short pause
> times, and none of the prints anything when adding PrintHeadAtGC, so it
> looks like they are not directly related to actually running a GC task.
>
> Can someone give an indication, what other typical reasons for those
> pauses exist? I tried to track it back from vm/runtime/vmThread.cpp, but
> wasn't really successful.
>
> Regards,
>
> Rainer
>
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> hotspot-gc-use at openjdk.java.net
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>   

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