---- Geoff Jacobs <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: > <snip> > > - The network/MPI combination is fairly critical to good performance and to > > price/performance. I have done some benchmarks where the right MPI library > > on GigE produces faster results than a bad MPI library on Myrinet. Seems > > counter-intuitive, but I've seen it. > > - The MPI is pretty important to good performance particularly on GigE. One > > benchmark I did showed over a 2X in performance on LAM compared to > > MPICH1. I know MPICH1 is really old and we have a shiny new MPICH2, but > > you would be suprised how many people start with MPICH1 and how many > > people stick with it. > Do you have some anecdotal numbers for different MPI libraries over GigE?
Sure. This is for one specific CFD code. Let's assum that MPICH 1 is the basline. MPICH2 was twice as fast (half the run time). LAM was 30% faster than MPICH2. Scali MPI Connect was 20% faster than LAM. Altogether, Scali MPI Connect was twice as fast as MPICH1. Is this what you were looking for? Jeff _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
