Re: HT Benchmarks (was: /proc/cpuinfo and hyperthreading)

From: H. Peter Anvin (hpa@zytor.com)
Date: Mon Dec 16 2002 - 18:50:04 EST


Followup to: <FKEAJLBKJCGBDJJIPJLJAEOLDLAA.scott@coyotegulch.com>
By author: "Scott Robert Ladd" <scott@coyotegulch.com>
In newsgroup: linux.dev.kernel
>
> From what I can see, HT provides a 0-15% increase in performance, depending
> heavily on the type of code being run. In other words, HT helps, but it is
> *no* substitute for true multiple processors. And it is ONLY of value when
> an SMP kernel is in use.
>

It would be interesting to compare an UP kernel with HT off to an SMP
kernel with the HT on...

        -hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>
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