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From "Ken Clark" <mkcla...@mindspring.com>
Subject RE: HttpClient and CPU usage.....
Date Thu, 27 Mar 2003 10:24:44 GMT
Thank you all for your assistance.  I downloaded the nightly drop yesterday
and will go about compiling it today and testing under JDK 1.4.

-----Original Message-----
From: Oleg Kalnichevski [mailto:o.kalnichevski@dplanet.ch]
Sent: Wednesday, March 26, 2003 1:09 PM
To: Commons HttpClient Project
Subject: Re: HttpClient and CPU usage.....


Busy wait has been fixed after 2.0a3 release. So, a recent nightly build
is needed. Besides, it turned out that Ken was using a rather old JDK
(1.2) which is known to have rather lousy JIT on Solaris platform. I
have already recommended Ken to upgrade both the JDK and the HttpClient

Cheers

Oleg

On Wed, 2003-03-26 at 17:10, Tom Samplonius wrote:
>   What version of httpclient are you using?
>
>   I understand that a busy read loop was removed from httpclient a couple
> of weeks ago.  I'm not sure if this change was made for Alpha3, or whether
> you have to go the daily builds to get it.
>
> Tom
>
>
> On Wed, 26 Mar 2003, Ken Clark wrote:
>
> > I've built a b2b application using the commons HttpClient, and all works
> > extremely well.  The problem is, however, that the app is using up to
45% of
> > the CPU time ( as reported by various unix processes ( ps -aux, vmstat,
> > etc ) ).  The customer has a Sun 4500, running solaris, with two
processors.
> >
> > I've tried debugging the app's CPU usage using
the -Xrunhprof:cpu=samples
> > parameter in the VM, and it returns the "hot spots" for CPU usage :
> >
> >    1 74.67% 74.67% java/net/SocketInputStream.read      ([BII)I
> >    2  9.61% 84.28% java/net/PlainSocketImpl.available   ()I
> >    3  8.51% 92.79% java/net/PlainSocketImpl.doConnect
> > (Ljava/net/InetAddress;I)V
> >
> > everything else is using less than 0.50% of the VMs CPU.
> >
> > Since I'm not using these classes directly, I'm assuming that HttpClient
is.
> > How can I make my app use less of the CPU?
> >
> >
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> >
>
>
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