RE: Wrong CPU count

[Robert Sinko]

Matt,

Thanks for the reply. First, let me say thank you very much for a super web
site that helped us sort out issues with the 2650 RAID stuff.

I'm not familiar with the HyperThreading concept.

Do you know of any docs that discuss this.  I'm particularly concerned with
how this impacts the results of monitoring tools such as top.

Thanks,
Bob

-----Original Message-----
From: [e-mail] [mailto:[e-mail]]
Sent: Thursday, July 18, 2002 4:01 PM
To: [e-mail]; [e-mail]
Subject: RE: Wrong CPU count

> After upgrading  from kernel 2.4.7-10smp to 2.4.9-34smp using 
> the Red Hat
> RPM downloaded from RH Network, the CPU count on the machine 
> reported by
> dmesg and listed in /proc/cpuinfo was 4 rather than the actual 2.
> 
> This has occured on all 4 Dell 2650's that I've installed 
> this patch on.  I
> don't have any other mult-processor machines available to 
> test this with.

Congratulations, you purchased a fine PowerEdge 2650 with processors which
contain HyperThreading technology.  Each physical processor appears as two
logical processors.  This behaviour is expected, and correct. :-)

Thanks,
Matt

--
Matt Domsch
Sr. Software Engineer, Lead Engineer, Architect
Dell Linux Solutions www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com
#1 US Linux Server provider for 2001 and Q1/2002! (IDC May 2002)

DISCLAIMER: The information contained herein is confidential and is intended
solely for the addressee(s). It shall not be construed as a recommendation
to buy or sell any security. Any unauthorized access, use, reproduction,
disclosure or dissemination is prohibited. Neither ISLAND nor any of its
subsidiaries or affiliates shall assume any legal liability or
responsibility for any incorrect, misleading or altered information
contained herein. Thank you.