Re: Intel vs AMD
Hi Martin,
At an arbitrary level of precision, there will likely be differences [1].
These differences are unlikely to affect any model results to a notable degree.
When I've done testing previously with different compilers, processors, and
platforms, changing compilers (gcc vs ifortran) made the biggest difference,
and with a stiff problem the differences were <10% of the RSE. You can get
bigger differences than that with the problem I was using just due to initial
theta estimates.
The short answer is that it shouldn't be a problem.
[1] Intel has specifically slowed down their compiler for AMD chips before, but
that is hopefully behind us now.
http://i.downloadsquad.switched.com/2010/01/04/intel-forced-to-provide-a-compiler-that-isnt-crippled-for-amd-processors/
Thanks,
Bill
Quoted reply history
On Aug 12, 2012, at 4:09 PM, "Martin Johnson" <[email protected]> wrote:
> Dear Group,
>
> I would like to get your comments on the following:
>
> Intel fortran on Intel and AMD processors:
>
> I would like to install nonmem compiled using Intel fortran compiler (11.2)
> in a linux OS with AMD processor. Will the nonmem results of this
> installation differ from other processors (nonmem compiled using Intel
> fortran compiler in intel processors).If there would be a difference, what
> could be the possible reasons for this difference?
> OR
> Are there any recommendations like optimization flags to get most similar
> results between these processors?
>
> Thanks for your help
>
> regards,
> Martin
>