If I start an MPI job with: mpirun -np 2
the following gets shown: -------------------------------------------------------------------------- [0,1,0]: OpenIB on host tux was unable to find any HCAs. Another transport will be used instead, although this may result in lower performance. -------------------------------------------------------------------------- -------------------------------------------------------------------------- [0,1,0]: uDAPL on host tux was unable to find any NICs. Another transport will be used instead, although this may result in lower performance. -------------------------------------------------------------------------- libibverbs: Fatal: couldn't read uverbs ABI version. before it runs the job. The point is: As I have *one* SMP machine, there is no need to use Infiniband etc. as accessing the local memory directly will be faster ;-) Why is this message shown in this case? (I read that one can suppress the first message via "btl=^openib" in /etc/openmpi-mca-params.conf:.) Tobias
