> > Ah! So my "real" latencies are 140/2 = 70 microsecs. > > I see ping times of ~70μs between the nVidias I posted data on, and > they > have an MPI latency of ~12μs. If you want a measurement/benchmark for > MPI performance use IMB, like for the results I posted.
In addition to Intel MPI Benchmarks (formerly known as Pallas), osu_latency is another common benchmark for MPI latency, part of the OSU MPI Benchmark (OMB) suite, available here: http://mvapich.cse.ohio-state.edu/benchmarks/ -Tom > Otherwise > people sometimes use netpipe. If you want basic Ethernet (Layer 2) > figures, look for Hughes-Jones' ethmon, somewhere under > http://www.hep.man.ac.uk/. > > _______________________________________________ > Beowulf mailing list, [email protected] sponsored by Penguin > Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
