On Fri, Aug 29, 2014 at 9:32 AM, John Hearns <john.hea...@viglen.co.uk> wrote: > I would say the usual tool for that pair-wise comparison is Intel IBM > https://software.intel.com/en-us/articles/intel-mpi-benchmarks > I hope I have got your requirement correct!
John, Close, but not exact. IMB will test ranks, but will not tell me if a specific pair of ranks is slower then others, only the collective of the ranks under test. what i'm looking for is an mpi version of this for x in node1->node100 for y in node1->node100 if x==y then skip else mpirun -n 2 -npernode 1 -host $x,$y bwtest > $x$y.log unfortunately, the mpirun task takes about 3secs per iteration, and with 10k iterations, it's going to take along time and i'm being impatient. i've been trying to write the mpi code myself, but my mpi is a little rusty so it's slow going... > Also have you run ibdiagnet to see if anything is flagged up? i've run a multitude of ib diags on the machines, but nothing is popping out as wrong. what's weird is that it's only certain pairing of machines not any one machine in general. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
