Top not showing 4 cpus on 2 xeons with HT

Søren Klintrup soren at klintrup.dk
Wed Apr 25 13:12:27 UTC 2007


On Wed, 25 Apr 2007 15:26:02 +0400, "Artem Kuchin" <matrix at itlegion.ru> wrote:
> I am just wondering if it is normal.
> I have two xeon  processors with HT on each of them.
> When loading kernel says that 4 cpu's are found,
> but when i do top i can see only 0 or 2 in the C
> column. never 1 or 3. Is it normal?

Hyperthreading has been disabled by default for quite some time now.

More info (including ways to reenable HTT) can be found here:

http://security.freebsd.org/advisories/FreeBSD-SA-05:09.htt.asc

Regards,
Søren Klintrup



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