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Date: Sun, 24 Feb 2008 12:46:23 +0100
From: Dominic Fandrey <kamikaze@bsdforen.de>
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To: Tigger <tigger@lvlworld.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Dual core CPU's, but only 2 CPU's in-use?
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Tigger wrote:
> Hello. I have a Xeon system with 2 CPU's installed (dual-cores). Under
> FreeBSD 6.2, a systat reported 4 CPUs in use and so did dmesg. 
> 
> Under FreeBSD 6.3, dmesg is reporting the 4 CPUs, but systat is only
> reporting 2 CPUs (CPU 0 and CPU 2). 
> 
> How do I enabled the second cores on the CPU's or are they really
> running but systat is not reporting the CPU load across the cores?

You can run 'top -S' to check how many idle processes exist. If there are 
four, everything is fine.