4 CPU Problem

[Jay Berryman]

If you have a multi-threaded processor, like the newer Xeons, Linux will see
it as 2 processors instead of 1.  I don't see why that would cause your
processes to run slower though.

Jay Berryman
Systems Engineer, RHCT
 

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-----Original Message-----
From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com]
On Behalf Of Andrew.Bridgeman at corusgroup.com
Sent: Tuesday, July 27, 2004 10:08 AM
To: redhat-list at redhat.com
Subject: 4 CPU Problem

I have recently rebuilt a Linux machine ( Redhat 7.3 ). I have just noticed
that when i do the top command it shows 4 CPU'S, the strange thing is  that
i only have 2 CPU's in the machine. I had a e-mail from one of my users
complaining about jobs running slower than expected on this machine as per
text below. Can someone tell me why this is the case and how i get my
machine back to showing 2 CPU's!

job running 20% slower on lin14 than expected. 4 cpus were being monitored
on lin14 instead of 2.

Regards

Andrew Bridgeman
IT Systems Engineer
Corus Automotive
IARC Building
University of Warwick
Coventry
CV47AL
Tel: +44 (0)2476 241262


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