Dual core CPU's, but only 2 CPU's in-use?

[Tigger]

On Sun, 24 Feb 2008 12:46:23 +0100
Dominic Fandrey <kamikaze at bsdforen.de> wrote:

> 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.
> 


Sadly, no luck. Only cpu0 and cpu2 are reported:

  PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU
COMMAND 11 root        1 171   52     0K     8K CPU2   2 143:43 92.38%
idle: cpu2 13 root        1 171   52     0K     8K RUN    0 142:33
92.04% idle: cpu0

-Tig