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From "Bill Barker" <wbar...@wilshire.com>
Subject RE: NIO vs BIO speed
Date Mon, 26 Jun 2006 17:56:52 GMT
I haven't tested Filip's connector yet, but that's also my experience with
the AJP/NIO connector:  NIO is pretty much useless on Windows. 

> -----Original Message-----
> From: Remy Maucherat [mailto:remm@apache.org] 
> Sent: Monday, June 26, 2006 4:58 AM
> To: Tomcat Developers List
> Subject: Re: NIO vs BIO speed
> 
> Filip Hanik - Dev Lists wrote:
> > yes, I think they are looking pretty good. And I am fairly 
> confident in 
> > this new code, as most of it, is old tested APR code.
> 
> (Of course, there hasn't been any new changes, so it's not a 
> surprise it 
> not working any better for me; I did reboot in the meantime, 
> though, and 
> I am running JRE 1.5.0_06)
> 
> Performance with NIO is still bad for me (3 times slower than 
> the other 
> connectors) with /usr/sbin/ab.exe -n 5000 -c 20 -k 
> http://127.0.0.1:8081/tomcat.gif. Throughput seems to vary 
> wildly during 
> the test. With /usr/sbin/ab.exe -n 5000 -c 20 
> http://127.0.0.1:8081/tomcat.gif (no keepalive), performance is 
> horrible, and kills the poller thread after a few hundred iterations 
> with the exception I reported earlier:
> Exception in thread "http-8081-Poller-0" 
> java.lang.NullPointerException
>          at 
> sun.nio.ch.WindowsSelectorImpl$FdMap.remove(Unknown Source)
>          at 
> sun.nio.ch.WindowsSelectorImpl$FdMap.access$3000(Unknown Source)
>          at sun.nio.ch.WindowsSelectorImpl.implDereg(Unknown Source)
>          at 
> sun.nio.ch.SelectorImpl.processDeregisterQueue(Unknown Source)
>          at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
>          at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
>          at sun.nio.ch.SelectorImpl.select(Unknown Source)
>          at 
> org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.
> java:1189)
>          at java.lang.Thread.run(Unknown Source)
> 
> Rémy
> 
> 
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> 
> 



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