[Beowulf] Q: AMD Opteron (Barcelona) 2356 vs Intel Xeon 5460

[Sangamesh B]

Hi Tim,

     Recently I benchmarked a Fortran based Scientific application on both
Intel Xeon Quad core and AMD Opteron Quad core with RHEL 5. Following are
the results:

                                               AMD-2.3GHz
         INTEL-2.33GHz

1. Serial                                   147.719
sec                                73.952 sec

2. Parallel 4 core                        39.798
sec                                32.317 sec

3. Parallel 8 core                        26.880
sec                                30.371 sec


      For AMD, I used GCC compiler(gfortran), which is released by AMD for
its barcelona-AMD fam10 based processors.

      For Intel, Intel 10 compilers.

Thank you,
Sangamesh
Conultant-HPC



On Mon, Sep 8, 2008 at 11:46 PM, Carsten Aulbert <carsten.aulbert at aei.mpg.de
> wrote:

> Hi Tim,
>
> Tim Chipman wrote:
> > Does anyone have any 'real world' experience with 'both' of these CPUs,
> in terms of relative performance for 'whatever work you do' ?
> >
> > I realize the xeon is a faster mhz part (3.16ghz xeon vs 2.3ghz opteron)
> so I'm more concerned with "relative performance per mhz"
> >
> > I'm involved with a cluster project, and we have 2 options from our
> vendor,
> >
> > - 25 compute nodes, dual-quadcore intel 5460, or
> > - 32 compute nodes, dual-quadcore amd 2356
> >
> >>From what I've been able to glean (Spec.org / SpecCPU 2006),
> >
> > - the intel chips have better integer performance
> > - the amd chips have better FPU performance
> >
> > so the likely anticipated real-world performance result .. will depend on
> how a given application blends / balances things.
>
> We have "only" the Quad-Xeon boxes with E5435 and these are quite fast,
> indeed it seems that FFTW seems to run faster on Xeons but I have not
> made any benchmarks for the past ~ 9 months, so I don't know about the
> latest Opterons.
>
> I think you need to come up with a real world scenario of what will be
> run on the cluster and maybe compile a little benchmark yourself ans aks
> the vendor to run both (or get hands on on both boxes. I think that's
> the only "fair" comparison that's possible.
>
> HTH
>
> Carsten
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