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Date: Thu, 7 May 2009 06:55:17 +0400
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From: pluknet <pluknet@gmail.com>
To: Barney Cordoba <barney_cordoba@yahoo.com>
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Cc: "Current@freebsd.org" <Current@freebsd.org>
Subject: Re: Hypertherading
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2009/5/7 Barney Cordoba <barney_cordoba@yahoo.com>:
>
> I just got a shiny new nehalem box and it comes up with 16 processors with dual quads installed. Is there any benefit or should hyperthreading be disabled?
>

Hi. There is a measurable win if hyperthreading is enabled [1].
You can switch it off via machdep.hyperthreading_enabled loader tunable.

[1] http://lists.freebsd.org/pipermail/freebsd-stable/2009-January/047460.html


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