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SubjectRe: Kernel reports 4 CPUS instead of 2...
Date
Ah I see...

Thanks! I take it that it is "safe" to leave this turned on... The kernel
knows how to correctly handle the hyper-threading stuff?

Mark

----- Original Message -----
From: "Joel Jaeggli" <joelja@darkwing.uoregon.edu>
To: "Mark Cuss" <mcuss@cdlsystems.com>
Cc: <linux-kernel@vger.kernel.org>
Sent: Wednesday, October 16, 2002 11:37 AM
Subject: Re: Kernel reports 4 CPUS instead of 2...


> disable hyper-threading in your bios if you want to see two cpu's...
>
> otherwise see:
>
> http://developer.intel.com/technology/hyperthread/
>
> practically speaking you may see a performance hit in some application
> mixes from having it enabled.
>
> joelja
>
> On Wed, 16 Oct 2002, Mark Cuss wrote:
>
> > Hello all
> >
> > I'm working with a new Dell Poweredge 4600 Server with Dual CPUs.
However,
> > Linux reports that it sees 4 CPUs... I have opened the thing to see if
Dell
> > gave me 2 extras for free, but no luck: Attached is /proc/cpuinfo.
> >
> > I've tried the RedHat 8.0 stock kernel, as well as a freshly compiled
2.4.19
> > but both exhibit the same behavior.
> >
> > The specifics on the machine:
> >
> > Dual Xeon 2.2 GHz CPUs (512 k L2 cache)
> > 2 Gigs DDR RAM
> > The chipset is a ServerWorks CMIC-HE (see attached lspci for complete
> > listing).
> >
> > Has anyone else seen this behavior? The only other SMP machine I have
is an
> > older Dell server with Dual 1 GHz coppermines, and it reports 2 CPUs...
> >
> > Any information or advice is greatly appreciated...
> >
> > Thanks in Advance,
> >
> > Mark
> >
> >
> > Mark Cuss
> > Real Time Systems Analyst
> > CDL Systems Ltd.
> > Suite 230
> > 3553 - 31 Street NW
> > Calgary, Alberta
> > T2L 2K7
> >
> > Phone (403) 289-1733 extension 226
> > Email: mcuss@cdlsystems.com
> > URL: www.cdlsystems.com
> >
>
> --
> --------------------------------------------------------------------------
> Joel Jaeggli Academic User Services joelja@darkwing.uoregon.edu
> -- PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E --
> In Dr. Johnson's famous dictionary patriotism is defined as the last
> resort of the scoundrel. With all due respect to an enlightened but
> inferior lexicographer I beg to submit that it is the first.
> -- Ambrose Bierce, "The Devil's Dictionary"
>
>
>

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