Once CPU idle at all times

[Kris Kennaway]

On Thu, Aug 10, 2006 at 06:08:00AM +0000, Duane Hill wrote:
> 
> I know this was asked once before. I can't recall if it had received a 
> response or not. If so, tell me to go digging.
> 
> Otherwise, I have a server that is a dual Zeon 2.8 and I have the 
> hyperthreading enabled within the bios. When I use top, it shows one of 
> the CPU's as apparently not being used. Why is this?
> 
>   13 root  171  52   0K   8K CPU1  0   0:00 99.85% idle: cpu1 <-- This one
>   11 root  171  52   0K   8K RUN   3 383.1H 61.38% idle: cpu3
>   14 root  171  52   0K   8K RUN   0 403.4H 61.13% idle: cpu0
>   12 root  171  52   0K   8K RUN   2 333.4H 49.95% idle: cpu2

Hyperthreading is not enabled in FreeBSD (it's off by default)?  On
some systems the sysctl for disabling HTT doesn't actually work
properly and leaves some of the logical CPUs active.

Kris
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