Re: [PATCH 1/4] [x86] Add command line option to enable/disable hyper-threading.

[Mark Rustad <mrustad@gmail.com>]

On Dec 1, 2006, at 10:56 AM, Alan wrote:
> > So I think people have blown those SSL timing attacks _way_ out of
> > proportion, just because it sounds technical and cool.
> >
> > Besides, most of the time you can disable HT in the BIOS, which is  
> > better
> > anyway if you don't want it.
>
> Agreed - but the SSL thing is an irrelevance. The main reason for
> disabling HT (especially on a single core CPU) is because a lot of
> workloads run faster with HT *off*.

Yes. Another way to effectively turn it off is to set maxcpus to the  
number of physical cpus in your system. So far I have not encountered  
a system that that approach does not work on.

--
Mark Rustad, MRustad@mac.com

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