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Date:      Thu, 5 Apr 2007 18:55:58 +0100
From:      "Kimi Ostro" <kimimeister@gmail.com>
To:        "Mark Messier" <mark@messier.com>
Cc:        Garrett Cooper <youshi10@u.washington.edu>, freebsd-questions@freebsd.org
Subject:   Re: trouble with HT
Message-ID:  <42b497160704051055h41c83f68l3985f7ab23166731@mail.gmail.com>
In-Reply-To: <30662671-669D-401E-A63D-048A224F80DD@messier.com>
References:  <20070403194555.4a9d1f2f.freebsd@dfwlp.com> <20070404005721.GA19966@xor.obsecurity.org> <20070403212527.b94753ea.freebsd@dfwlp.com> <4613848B.5080306@tiscali.it> <46145B8F.3010109@u.washington.edu> <30662671-669D-401E-A63D-048A224F80DD@messier.com>

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On 6.X including RELENG_6 you need to use the SMP kernel config in
src/sys/i386/conf and on CURRENT just use GENERIC kernel config.

then add machdep.hyperthreading_allowed =1 to /boot/loader.conf

reboot

the other factor in HyperThreading which some forgot is whether you
BIOS has support, and whether it is enabled.

works for me on a 2.8GHz Northwood on Intel 865G.

HTH,

-- 
Kimi



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