Rahul Nabar <[email protected]> writes: > I thought so! :) Lazy person's first shot. Now I will try ethtool.
It's not relevant with all NICs. Some use driver module parameters. > Any way to verify if I do? Consult the NIC's documentation. > 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. 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
