Hyperthreading in 6.x ... still frowned upon?
kris at obsecurity.org
Wed May 3 18:50:07 UTC 2006
On Wed, May 03, 2006 at 01:36:04PM -0400, Vinny Abello wrote:
> An Intel technical rep that gave a presentation on upcoming Intel VT
> technology in processors (Virtualization Technology) that I attended
> indicated that Hyperthreading was really designed to start getting
> programmers to program threading into their applications in
> preparation of dual core processors that we now have.
That sounds like an interesting interpretation of history :-)
> I typically disable Hyperthreading on all my servers as they are dual
> processor or dual core/dual processor or better anyway. I tend to get
> better results (with my applications) without Hyperthreading. I've
> been experimenting with leaving it on with my workstation as it's not
> a dual core or dual processor.
In my experience it's almost always a net loss too. One should
measure for oneself though.
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