Re: Announcing Intel Fortran Compilers 9.0

hchu@xxxxxxxxxxxxxx wrote:
> Yes, my program is well suited for parallel processing. All floating
> point
> numbers are in double precision.

Being in double precision has nothing whatsoever to do with parallel
processing. I was thinking more along the lines of OpenMP, MPI or PVM.
Do these names mean anything to you? If not, then might I suggest that
you look into at least one of them, in order to get the most out of your
cluster. Unless, that is, you're interested in using the cluster as a
parameter search engine.

>
> The comparison was performed on a single processor Opteron, I had
> dual boot. The Linux was 64 bit and the Windows was XP. Since the
> Windows
> compilers were 32 bit, the run time were the same on XP and 2003.
>
> If the speed improvement is significant, we need to shell some money to
> upgrade
> the compilers on Linux. Otherwise, if it is only 10%, lets say, we will
> worry about in
> the future.

Fair enough -- I'd probably agree. But you said in your original post
that your program ran twice as slow on the Opteron cluster. Can I just
ask what you are comparing here -- the Windows and Linux codes on the
same machine? Or different machines?

cheers,

Rich
.

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