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[Caml-list] FP's and HyperThreading Processors
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Date: -- (:)
From: Kip Macy <kmacy@f...>
Subject: Re: [Caml-list] FP's and HyperThreading Processors


On Fri, 13 Jun 2003, David McClain wrote:

> > If it was optimized for the P2 it will by definition not be optimized for
> > the P4,
> 
> Yes, you are correct about this, but I have the Intel numerical libs for the
> P4 linked into the program. On the old P2 system, this code spend roughly
> 60% of its time inside that vendor code for FFT's. This is no longer true,
> as other tests show very high performance of just those vendor routines.

Althought he FFT code itself probably has large influence on memory access
patterns.

> hand crafted efficient low-level code. But they turned their backs on our
> more forward looking needs.

When I look at the sheer number of want ads for java programmers, I can't
help but wonder how much of an issue performance really is for most 
people. I honestly think it would be much cheaper to make GC systems
locality aware than for processor vendors to incorporate GC support. 
Especially considering the apparent lack of commercial demand for
it.




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