sp at scali.com
Tue May 7 01:55:40 PDT 2002
On Mon, 6 May 2002, Greg Lindahl wrote:
> On Tue, May 07, 2002 at 12:30:58AM +0200, Steffen Persvold wrote:
> > Greg,
> > Let's not turn this one into a flamewar, ok ?
> As far as I'm concerned, it's over, but I'm sure the same issue will
> come up again; that's the way life is.
> > However, it's not the 2 process results that interest me, it's
> > the larger ones (which test the scaling possibilities of the MPI
> > implementation and the interconnect).
> I would disagree with this sentence. Large MPI applications which I
> have used have not used things like collective operations. So it's
> easy to stare at a big set of microbenchmarks and not learn anything
> about the scaling of an MPI application. Bisection bandwidth, now
> that's interesting.
Hmm, in which category of MPI applications is that ? I've seen many
commercial (industry type) MPI applications which use collective
operations heavily, so it has a significance to them. Anyway, which
application do you suggest for reporting bisection bandwidth ? mpperf ?
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