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Date:      Wed, 25 Apr 2007 14:52:34 +0200
From:      =?UTF-8?Q?S=C3=B8ren_Klintrup?= <soren@klintrup.dk>
To:        Artem Kuchin <matrix@itlegion.ru>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Top not showing 4 cpus on  2 xeons with HT
Message-ID:  <aad6829a6ac2d2cb64e2fade6984a3f6@mail>
In-Reply-To: <00e301c7872d$03e1db80$0c00a8c0@Artem>
References:  <00e301c7872d$03e1db80$0c00a8c0@Artem>

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On Wed, 25 Apr 2007 15:26:02 +0400, "Artem Kuchin" <matrix@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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