Hi,
On Mon, 15 Dec 2003, 9:53pm -0800, [log in to unmask] wrote:
> At 12:11 PM 12/15/2003, Peter Shenkin wrote:
>
> >Hi,
> >
> >Please be aware that any compilation for Pentium will work
> >on Opteron; Opteron is backwards-compatible with "normal"
> >x86 builds. Our normal Absoft x86 builds, done on Athlon
> >or PIII, run just fine, and benchmark very well, on Opteron.
> >
> >There may be some special Opteron flags you can specify,
> >but I doubt they'll do much. For instance, the special
> >Athlon flags make not a whit of difference when we benchmark
> >our codes on Athlon.
>
> To some people, the 15% or so of performance gained by using Opteron flags
> is a whit of difference.
That would indeed be approximately one whit.
FWIW, my comment on Athlon reflected the fact that I couldn't
even see a 1% difference.
-P.
--
Peter S. Shenkin Schrodinger, Inc.
VP, Software Development 120 W. 45th St., 32nd Floor
646 366 9555 x111 Tel New York, NY 10036
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