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Message-ID: <0ce901c2753c$4b5f2790$2c0e10ac@frinkiac7>
From: "Mark Cuss" <mcuss@cdlsystems.com>
To: <joelja@darkwing.uoregon.edu>
Cc: <linux-kernel@vger.kernel.org>
References: <Pine.LNX.4.44.0210161033070.9805-100000@twin.uoregon.edu>
Subject: Re: Kernel reports 4 CPUS instead of 2...
Date: Wed, 16 Oct 2002 11:48:54 -0600
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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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