[Beowulf] Intel 64bit (emt) Fortran code and AMD Opteron

Serguei.Patchkovskii at sympatico.ca Serguei.Patchkovskii at sympatico.ca
Thu Oct 28 15:56:48 PDT 2004

On 28 Oct 2004 at 12:06, Roland Krause wrote:

> does anybody here have positive or negative experiences with using the
> Intel EMT-64 Fortran compiler on AMD Opteron systems? 

It works fine, as long as you do not use Prescott new instructions (which are in any
event of less importance on Opterons - they are not as decode-crippled as P4s are),
I've built a few moderately complex quantum chemistry codes with EM64 ifort, and
they run OK on Opterons.

> I am at this point not so much interested in speed issues but more
> stability and correctness especially with respect to OpenMP. Or in
> other words: Is it worth trying yet? 

I can't comment on OpenMP, but for serial code it is a nice, fast and reasonably stable 
compiler. Not as stable or as fast as Pathscale's, but far superior to PGI's. 

As usual, YMMV - and probably will.


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