[gmx-users] Blue Gene/P

[Berk Hess]

Hi,

Gromacs 4 has blue gene optimized inner loops, which give a factor of 2
performance improvement.
On a BG/L it runs at 20-25% of the speed of x86 cores, but it scales
quite well.

Berk.


> Date: Mon, 31 Mar 2008 17:29:57 -0700
> From: tieleman at ucalgary.ca
> To: gmx-users at gromacs.org
> Subject: Re: [gmx-users] Blue Gene/P
> 
> Thanks. I've seen the BG/L argument, but BG/P processors are faster. I 
> have no idea how much though, and am looking for actual numbers or if 
> those are not available a guess based on actual BG/L numbers and some 
> argument about scaling to a BG/P.
>  
> Cheers,
> Peter
> 
> Mark Abraham wrote:
> > Peter Tieleman wrote:
> >> Hi,
> >>
> >> Has anyone run benchmarks on a BlueGene/P ?
> >
> > The word from IBM in December was that since GROMACS 3.x would lack 
> > both assembly inner-loops and threading on BlueGene/L, that it wasn't 
> > worthwhile running GROMACS on onw. I figure that goes for BlueGene/P too.
> >
> > Mark
> > _______________________________________________
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> 
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