barney_cordoba at yahoo.com
Thu May 7 13:57:45 UTC 2009
--- On Wed, 5/6/09, pluknet <pluknet at gmail.com> wrote:
> From: pluknet <pluknet at gmail.com>
> Subject: Re: Hypertherading
> To: "Barney Cordoba" <barney_cordoba at yahoo.com>
> Cc: "Current at freebsd.org" <Current at freebsd.org>
> Date: Wednesday, May 6, 2009, 10:55 PM
> 2009/5/7 Barney Cordoba <barney_cordoba at 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
> You can switch it off via machdep.hyperthreading_enabled
> loader tunable.
I assume you mean hyperthreading-allowed?
sysctl -a | grep hyper
but it still launches 16 cpus. Is that expected? It doesn't seem correct.
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