Got it.
Thanks for taking the time to clarify! :)
Thanks!
Jon Brisbin
http//jbrisbin.com
----- Original Message -----
> From: "Oleksiy Stashok" <oleksiy.stashok_at_oracle.com>
> To: users_at_grizzly.java.net
> Sent: Wednesday, July 20, 2011 4:46:54 PM
> Subject: Re: performance of Grizzly FixedThreadPool
> On 07/20/2011 11:19 PM, Jon Brisbin wrote:
> > So is that CPU load reported as the result of my doing the actual
> > work?
>
> The report you posted shows amount of time spent by CPU in different
> methods (most probably it's including sleep).
> So amount of time spent in getTask() is 33% of total, but it doesn't
> mean CPU is busy at that time.
> For example:
> Thread.sleep(10000);
> will show you 100% of time spent in sleep(), but CPU doesn't do
> anything at that time so it can not affect other threads and
> processes.
> Thanks.
> WBR,
> Alexey.
> > Thanks!
>
> > Jon Brisbin
>
> > http//jbrisbin.com
>
> > ----- Original Message -----
>
> > > From: "Oleksiy Stashok" <oleksiy.stashok_at_oracle.com>
> >
>
> > > To: users_at_grizzly.java.net
> >
>
> > > Sent: Wednesday, July 20, 2011 4:15:31 PM
> >
>
> > > Subject: Re: performance of Grizzly FixedThreadPool
> >
>
> > > On 07/20/2011 11:08 PM, Jon Brisbin wrote:
> >
>
> > > > I'm seeing a ton of CPU usage in
> > > > org.glassfish.grizzly.threadpool.FixedThreadPool$BasicWorker.getTask()
> > > > in my profiling (34%).
> > >
> >
>
> > > This method can not slow down the server, it just waits for a new
> > > task to execute.
> >
>
> > > If you don't run any load, you can find the server spending
> > > almost
> > > 100% of time in that method.
> >
>
> > > WBR,
> >
>
> > > Alexey.
> >
>
> > > > I'm doing 200,000 PUTs of 1MB of data within an 8 second time
> > > > span
> > > > (200 simultaneous users).
> > >
> >
>
> > > > Here's a CSV of the profile results for this run:
> > >
> >
>
> > > > "Name","Time (ms)","Samples"
> > >
> >
>
> > > > "<All threads>","5931","100"
> > >
> >
>
> > > > "java.lang.Thread.run()","5901","80"
> > >
> >
>
> > > > "org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run()","5890","60"
> > >
> >
>
> > > > "org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork()","5890","60"
> > >
> >
>
> > > > "org.glassfish.grizzly.threadpool.FixedThreadPool$BasicWorker.getTask()","4292","34"
> > >
> >
>
> > > > "org.glassfish.grizzly.utils.LinkedTransferQueue.take()","4292","34"
> > >
> >
>
> > > > "org.glassfish.grizzly.utils.LinkedTransferQueue.xfer(Object,
> > > > int,
> > > > long)","4292","34"
> > >
> >
>
> > > > "org.glassfish.grizzly.utils.LinkedTransferQueue.awaitFulfill(LinkedTransferQueue$QNode,
> > > > LinkedTransferQueue$QNode, Object, int, long)","4292","34"
> > >
> >
>
> > > > "java.util.concurrent.locks.LockSupport.park(Object)","4292","34"
> > >
> >
>
> > > > "org.glassfish.grizzly.nio.SelectorRunner.run()","736","20"
> > >
> >
>
> > > > "org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$1.run()","717","5"
> > >
> >
>
> > > > "org.glassfish.grizzly.threadpool.AbstractThreadPool.onTaskDequeued(Runnable)","145","1"
> > >
> >
>
> > > > "org.glassfish.grizzly.utils.DelayedExecutor$DelayedRunnable.run()","10","5"
> > >
> >
>
> > > > "java.lang.Object.wait(long)","10","5"
> > >
> >
>
> > > > "java.lang.ref.Finalizer$FinalizerThread.run()","22","5"
> > >
> >
>
> > > > "java.lang.ref.Reference$ReferenceHandler.run()","7","5"
> > >
> >
>
> > > > "com.mongodb.Mongo$DBCleanerThread.run()","0","5"
> > >
> >
>
> > > > "com.intellij.rt.execution.application.AppMain.main(String[])","0","5"
> > >
> >
>
> > > > The last two columns are time in ms and CPU%.
> > >
> >
>
> > > > This is limiting my tests as the CPU usage is slowing down my
> > > > server.
> > >
> >
>
> > > > Thanks!
> > >
> >
>
> > > > Jon Brisbin
> > >
> >
>
> > > > http//jbrisbin.com
> > >
> >
>