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Date: Tue, 13 Dec 2005 14:54:54 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: robert@webtent.com
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Cc: FreeBSD <freebsd-questions@freebsd.org>
Subject: Re: Multiple CPUs
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On Tue, Dec 13, 2005 at 02:12:57PM -0500, Robert Fitzpatrick wrote:
> I guess this means my new server is only using one of my CPUs?
>=20
> esmtp# grep CPU /var/log/dmesg.today
> CPU: Intel(R) Xeon(TM) CPU 2.40GHz (2399.33-MHz 686-class CPU)
>   Hyperthreading: 2 logical CPUs
> cpu0: <ACPI CPU (2 Cx states)> on acpi0
>=20
> Can someone point me to the best doc for enabling use of both CPUs on
> the FreeBSD 5.4 server? I assume the kernel needs built with options.

FYI, hyperthreading is not a real CPU, and it seems to *really* hurt
performance on most workloads.  You'll probably benefit from not using
it.

Kris

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