> Kenneth Culver wrote:
> > I don't know if anyone is working on that, but from what I could tell, in
> > a lot of cases, enabling the hyperthreading actually *decreased*
> > performance of a lot of multithreaded and single threaded apps.
>
> It requires extensive compiler support.
>
> If you read the Intel documentation on how to write a compiler
> that does the right things, it reads like a list of sixteen
> "don't do this thing GCC did, do this instead".
>
> So the answer is really a question... does the original poster
> have their patches to GCC ready so that we can compile code
> that tests hyperthreading?
>
Yeah, I know, but from what I hear a lot of people are misunderstanding
what hyperthreading is, and they think it basically doubles performance. I
posted with that in mind. :-)
Ken
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