question about Intel P4 versus Alpha's

Henderson, TL Todd Todd_Henderson at isl-3com.com
Thu Jan 9 08:51:17 EST 2003


These are the regular run of the mill P4's.


-----Original Message-----
From: Brian [mailto:netengineer at cox.net]
Sent: Thursday, January 09, 2003 7:46 AM
To: Henderson, TL Todd; 'Patrick Geoffray'
Cc: beowulf at beowulf.org
Subject: Re: question about Intel P4 versus Alpha's


Hyperthreading has been available on all P4 Xeon's since the start. The
standard P4's above 3.xx ghz now support it as well.

----- Original Message -----
From: "Henderson, TL Todd" <Todd_Henderson at isl-3com.com>
To: "'Patrick Geoffray'" <patrick at myri.com>
Cc: <beowulf at beowulf.org>
Sent: Wednesday, January 08, 2003 12:49 PM
Subject: RE: question about Intel P4 versus Alpha's


> These are P4 2.4 ghz and I didn't find anything in the bios about it.  I
> thought I had read on Intel's website that hyperthreading was only in the
> 3.xx ghz P4's?
>
> Todd
>
>
> -----Original Message-----
> From: Patrick Geoffray [mailto:patrick at myri.com]
> Sent: Wednesday, January 08, 2003 1:38 PM
> To: Henderson, TL Todd
> Cc: 'beowulf at beowulf.org'
> Subject: Re: question about Intel P4 versus Alpha's
>
>
> Hi Todd,
>
> On Wed, 2003-01-08 at 10:49, Henderson, TL Todd wrote:
> > 95-100%cpu utilization range.  However, now we have a cluster of P4's
and
> > when I look at top, it is more like 70-80% cpu usage.  This is using the
> > same number of cpu's, the same switch, same code, and same problem for
the
> > code.  The jobs are still completing in about 30-40% less time, so we
are
> > getting a speed up.
>
> Is Hyper-threading enabled ?
>
> Patrick
> --
>
> Patrick Geoffray, Phd
> Myricom, Inc.
> http://www.myri.com
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