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From: Pete French <petefrench@ticketswitch.com>
Date: Wed, 01 Feb 2006 11:46:02 +0000
Cc: freebsd-stable@freebsd.org
Subject: Re: 6-stable and HTT P4
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> > Just got it to work though... Had to add 
> > machdep.hyperthreading_allowed=1 to loader.conf in addition to 
> > hlt_logical_cpus=0
>
> Great. FYI, HTT will give you little or even negative performance benefits.

Heh - I still cant persuade my 6.0-RELEASE to *not* use hyperthreading!
have got hyperthreading_allowed set to 0, hlt_logical_cpus set to 1 and
it sttill shcedules things on 4 CPU's rather than 2.

-pcf.