On 09.06.15 19:41, Johan Maasing wrote:
> I always wondered about self time. It is supposed to not count time
> spent in other methods but what about calls to methods that are not
> instrumented, will those count as self or not? Maybe that could
> explain some waiting time (even though self time isn't supposed to
> include waits)?
I believe the non-instrumented methods will be counted as self time.
Regarding wait time - AFAIR it depends on the profiler mode, sometimes
it is included.
WBR,
Alexey.
>
> 2015-06-09 18:55 GMT+02:00 Meltser Tiran <Tiran.Meltser_at_comverse.com
> <mailto:Tiran.Meltser_at_comverse.com>>:
>
> Hi Alexey,
>
> We don’t think this is the case as (I hope) you can see the graph
> is sorted by *Self Time (CPU)*.
>
> *Tiran Meltser***
> System Architect
> Global Products & Operations
> *Comverse* – /Making Your Network Smarter/
>
> T +972-3-7678381
> M +972-54-5639381
> Tiran.Meltser_at_comverse.com <mailto:Tiran.Meltser_at_comverse.com>
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> *From:*Oleksiy Stashok [mailto:oleksiy.stashok_at_oracle.com
> <mailto:oleksiy.stashok_at_oracle.com>]
> *Sent:* Tuesday, June 09, 2015 7:21 PM
> *To:* users_at_grizzly.java.net <mailto:users_at_grizzly.java.net>
> *Subject:* Re: CPU Usage Profiling
>
> Hi Uri,
>
> I suspect what you see is the total time spent inside the method,
> but most of the time it's in the idle state waiting for I/O
> events, so it shouldn't consume CPU.
> Please let me know if it's not the case.
>
> WBR,
> Alexey.
>
> On 09.06.15 16:29, Broide Uri wrote:
>
> Hi Alexey,
>
> After stabilizing on 100% Success Rate in heavy load on our
> application we started to perform CPU Usage profiling.
>
> We have noticed (you can see the attached screenshot) that we
> are spending 66% from the CPU time in the
> *org.glassfish.nio.DefaultSelectorHandler.select()* method.
>
> We are running the load with the following environment:
>
> ·Grizzly 2.3.21
>
> ·JDK 1.7.0_72-b14
>
> ·RHEL 5.X
>
> Any advice on how can we improve the high CPU consumption?
>
> cid:image003.jpg_at_01D0A2D6.6204FEE0
>
> Thanks
>
> Uri
>
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