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CMA: unable to open /dev/infiniband/rdma_cm
This Error Reference is intended for:
Any audience.
A message similar to this:
CMA: unable to open /dev/infiniband/rdma_cm
librdmacm: couldn't read ABI version.
librdmacm: assuming: 4
--------------------------------------------------------------------------
[[35854,1],0]: A high-performance Open MPI point-to-point messaging module
was unable to find any relevant network interfaces:
Module: OpenFabrics (openib)
Host: compute-29-5.local
Another transport will be used instead, although this may result in
lower performance.
--------------------------------------------------------------------------
[compute-43-16.local:04754] 1 more process has sent help message help-mpi-btl-base.txt / btl:no-nics
[compute-43-16.local:04754] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
May appear when you use mpi on the nodes which are not connected to infiniband.
This is only a warning, not an error.
You can avoid that mpi try to use the infiniband network with:
mpirun --mca btl ^openib --mca btl_tcp_if_include eth0 MyProg.exe
Of course this should not be used if you want to use the infiniband network.
To use Infiniband interconnect, submit with -lnodes=ib, for example:
#PBS -lnodes=2:ppn=8:ib
