On Thu, 2006-02-02 at 15:19 -0700, Galen M. Shipman wrote: > By using slots=4 you are telling Open MPI to put the first 4 > processes on the "bench1" host. > Open MPI will therefore use shared memory to communicate between the > processes not Infiniband.
Well, actually not, unless I'm mistaken about that. In my mca-params.conf I have : rmaps_base_schedule_policy = node That would spread processes over nodes, right ? > You might try: > > > mpirun -prefix /opt/ompi -wdir `pwd` -machinefile /root/machines -np > 2 -d xterm -e gdb PMB-MPI1 Thanks for the tip. The last time I tried this it took quite a few attempts before getting it right. As I did not remember the magic trick, I was somewhat reluctant to go in that direction. Since you just handed me the recipe on a sliver plate, I'll do it. J-C
