Re: hyperthreading or not

[Emmanuel Fleury <emmanuel.fleury@labri.fr>]

Jo Shields wrote:
>
> The problem with hyperthreading is that there's only a bare minimum of
> distinct hardware - almost all resources are shared. notably, a pipeline
> stall on one thread (where the pipelines on a p4 are ridiculously long)
> will flufh the hyperthread's pipeline too.

Ok, two threads in the same time means that you double your chance of
pipeline stall. It must be killing yourself on a P4, but what about an
AMD64 ?

The depth of the pipeline is still reasonable (isn't it ?).

Regards
-- 
Emmanuel Fleury

Time is a great teacher, but unfortunately it kills all its pupils.
  -- Hector Berlioz