[Beowulf] Roadrunner shutdown

Max R. Dechantsreiter max at performancejones.com
Fri Apr 5 08:48:05 PDT 2013


Vincent,

> Note that as for nuke explosions i have no idea how those look like - maybe
> someone more knowledgeable wants to comment on that.

I have optimized the ASCI benchmark codes.

> As a total layman there i would suspect that it's important where the
> protons/neutrons/whatever-tons/supertiny-tons are located. I'd be modelling
> that naively using
> matrixcalculations.

The most important codes simulate shock propagation.

> So that would mean the only low level library you need is a matrixcalculation
> and some relative simple functions - with the matrixcalculations
> eating 99% of all system time on that massive supercomputer out of all
> calculations done on it.
>
> In such case one would need surprisingly little very well optimized code to
> make optimal usage out of such massive supercomputer.

Not so.

Anyway, I wonder whether Roadrunner was used primarily for
nuclear simulations - LANL and LLNL have their own, much
larger, computational resources, both inside and outside
the "vault."

Regards,

Max


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