On Thu, 22 Jan 2004, 6:06am -0800, [log in to unmask] wrote:
> At 08:24 PM 1/21/2004, you wrote:
>
> >Hi,
> >
> >On Thu, 22 Jan 2004, 10:14am +1100, [log in to unmask] wrote:
> >
> > > For our codes (numerical weather and climate models) the Intel
> > > compiler's P4 specific optimizations have a large benefit.
...
> >(P3-P4)/P3 = 29% => impressive.
...
> > > Another model
...
> >(P3-P4)/P3 = 10% => uninteresting.
> The first group of timings would be typical of an application with
> significant vectorizable double precision content. Likewise, the second
> group likely has vectorizable single precision code.
> You may have noticed that Intel is phasing out support for P-III optimized
> code generation.
Would you ever expect something like a 30% improvement for
Opteron, based on special compilation?
-P.
--
Peter S. Shenkin Schrodinger, Inc.
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