From: Andrew Walrond <andrew@walrond.org>
To: "Matthew A. Miling" <mamiling@mailbox.syr.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Measuring CPU with Hyperthreading and Linux
Date: Wed, 30 Apr 2003 22:41:49 +0100 [thread overview]
Message-ID: <3EB0431D.3090705@walrond.org> (raw)
In-Reply-To: 3EB61ACD@OrangeMail
Run top, then press 1 to get a 'per cpu' usage line, rather than the
default combined thing.
Obviously you'll need a threaded app to take advantage of the
processors, and preferably a 2.5 kernel with Ingo's HT scheduler patch...
Andrew
Matthew A. Miling wrote:
> Hello
>
> Please personally CC my email address to any responses:
> mamiling@syr.edu
>
> I am currently running a dual Pentium 4 Xeon 2.4 GHz system containing Red Hat
> Linux 6.2 with the 2.4.20 kernel. The Pentium 4 Xeons report 4 cpu's to
> /proc/cpuinfo because they are hyperthreaded.
>
> My problem lies in trying to measure the CPU usage with such programs as top
> or gtop. Typically, I see CPU loads in excess of 100% when I run top with
> some of my signal processing applications, but not more than 200%. Is this
> value out of 100%, 200%, or 400%? How does this dual, HT system kernel report
> this info to the OS?
>
> Any help would be appreciated. Thanks
>
prev parent reply other threads:[~2003-04-30 20:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-30 16:51 Measuring CPU with Hyperthreading and Linux Matthew A. Miling
2003-04-30 21:41 ` Andrew Walrond [this message]
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