From: Mathieu Chouquet-Stringer <mathieu@newview.com>
To: "\"Watson, Randy E\"" <randy.e.watson@boeing.com>
Cc: linux-smp@vger.kernel.org
Subject: Re: 2.4.19 kernel incorrectly reports # CPUs
Date: 11 Sep 2002 11:56:18 -0400 [thread overview]
Message-ID: <xlthegwpljx.fsf@shookay.newview.com> (raw)
In-Reply-To: <6E5042539D21AF4E9C457B4DDCC3D6E10A9E6D@xch-nw-21.nw.nos.boeing.com>
randy.e.watson@boeing.com ("Watson, Randy E") writes:
> I have built the 2.4.19 kernel for a dual processor Xeon system with a
> SuperMicro P4DC6 mainboard.The kernel incorrectly finds four CPUs
> instead of the two it has. Using "top" shows four active CPUs and cpuinfo
> also shows four CPUs. I have built/run a number of other kernels (2.4.18,
> 2.5.33)
> recently on this system and they don't exhibit this problem.
>
> What may be causing this?
Hi Randy,
the cause of this is HT (HyperThreading) thus your dual Xeon (with HT
enabled) looks like a quad CPU.
This is expected behaviour...
--
Mathieu Chouquet-Stringer E-Mail : mathieu@newview.com
It is exactly because a man cannot do a thing that he is a
proper judge of it.
-- Oscar Wilde
next prev parent reply other threads:[~2002-09-11 15:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-11 15:53 2.4.19 kernel incorrectly reports # CPUs Watson, Randy E
2002-09-11 13:00 ` Arnaldo Carvalho de Melo
2002-09-11 15:56 ` Randy.Dunlap
2002-09-11 15:56 ` Mathieu Chouquet-Stringer [this message]
2002-09-11 16:02 ` Eff Norwood
2002-09-11 16:25 ` Robert M. Hyatt
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