Dear OpenMPI List:
I am running the Myrinet MX btl with OpenMPI on MacOSX 10.4.
I am running into a problem. When I run on one processor per node,
OpenMPI runs just fine. When I run on two processors per node
(slots=2), it seems to take forever (something is hanging).
Here is the command:
mpirun -mca btl mx,self -np 2 pi3f90.x
However, if I give the command:
mpirun -np 2 pi3f90.x
The process runs normally. But, I do not know if it is using the Myrinet
network. Is there a way to diagnose this problem. mpirun -v and -d do
not seem to indicate which mca is actually being used.
Anthony C. Iannetti, P.E.
NASA Glenn Research Center
Propulsion Systems Division, Combustion Branch
21000 Brookpark Road, MS 5-10
Cleveland, OH 44135
Please note: All opinions expressed in this message are my own and NOT
of NASA. Only the NASA Administrator can speak on behalf of NASA.