[Beowulf] newbie

malcolm Crouch malcolm.croucher at gmail.com
Sat May 2 12:07:23 PDT 2009


Hiya ,

Are there any academic papers which compare and evaluate compilers  for
distributed computing ?

Cheers

Malcolm
On Sat, May 2, 2009 at 10:21 AM, Chris Samuel <csamuel at vpac.org> wrote:

>
> ----- "Gus Correa" <gus at ldeo.columbia.edu> wrote:
>
> > Hi Chris, list
>
> Hiya,
>
> > Thanks for the info!
>
> Not a problem!
>
> > I have been blindly using "-march=amdfam10" (and -O3)
> > out of the gcc 4.1.2 man page, simply because it is
> > recommended for Barcelona (and hopefully also the
> > Shanghais we have).
>
> Well I did a microbenchmark beforehand (actually one from
> Joe Landman's blog) and found that the Barcelona extensions
> improved performance for it:
>
> http://www.csamuel.org/2009/03/15/comparing-fortran-compilers
>
> but that doesn't seem to carry over into the code our
> users are trying with it (possibly because they're not
> doing Fortran).
>
> So I would strongly suggest benchmarking your code both
> with and without that option and see what works best for
> you!
>
> > What would be the right level of optimization then?
>
> As ever, the answer is "it depends". :-)
>
> Experiment and read the info pages for the optimisation
> flags in GCC..
>
> [Intel and Shanghai]
> > Is this deliberate?
>
> In the sense that they have no desire to support
> competitors hardware, yes. Not really surprising,
> if AMD made compilers I doubt they'd try and do
> Intel specific optimisations either..
>
> cheers!
> Chris
> --
> Christopher Samuel - (03) 9925 4751 - Systems Manager
>  The Victorian Partnership for Advanced Computing
>  P.O. Box 201, Carlton South, VIC 3053, Australia
> VPAC is a not-for-profit Registered Research Agency
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-- 
Malcolm A.B Croucher
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