Re: OT: Nate is going to hate me...

["Bryan J. Smith" <b.j.smith@ieee.org>]

Robert Citek <rwcitek@alum.calberkeley.org> wrote:
> So this machine is a 2 dual-core processor machine, which
> is even better than hyperthreading:

The only thing worse than a P4 with HyperThreading is a P4
without HyperThreading, but only about 75% of the time. 
Sometimes the context switching is more overhead than the
benefits.

On a non-P4 with shorter stages, register renaming,
out-of-order execution and other benefits, it's detrimental. 
Hence why Intel is not doing HyperThreading on the new
P3-based designs.




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