Re: Processor Speed on Linux

On 8/17/05, Nuno Souto <dbvision_at_iinet.net.au> wrote:
> Marquez, Chris apparently said,on my timestamp of 17/08/2005 2:30 AM:
> > Be careful...with Intel HYPER THREADING two physical CPU is reported and
> > seen as four physical CPU.
> >
>
>
> When you do cat /proc/cpuinfo, check out the flags field.
> If it has the string "ht" in it, it's a hyper thread chip.
>
> --
> Cheers
> Nuno Souto
> in sunny Sydney, Australia
> dbvision_at_iinet.net.au

Also-

check dmesg for mapping of the hyperthreaded cpu onto the runqueue of the physical processor. In top, one can see on a lightly loaded server, processes run on the 2 physical CPUs first (on a RHEL ES kernel - update 5).

Paul

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