Note this is just a workaround, this simply disables the mxm mtl (e.g.
Mellanox optimized infiniband driver).
basically, there are two ways to run a single task mpi program (a.out)
- mpirun -np 1 ./a.out (this is the "standard" way)
- ./a.out (aka singleton mode)
the logs you posted do not specify how the test was launch (e.g. with or
without mpirun)
bottom line, if you hit a singleton limitation (e.g. mxm/mtl is not
working in singleton mode), then you can simply
mpirun -np <n> a.out
your Rmpi applications, and this should be just fine.
if not, you need to
export OMPI_MCA_pml=ob1
regardless you are using mpirun or not.
/* and for the sake of completion, if you are using mpirun, an
equivalent option is to
mpirun --mca pml ob1 ...
*/
Cheers,
Gilles
On 7/12/2016 1:34 AM, pan yang wrote:
Dear Gilles,
I tried export OMPI_MCA_pml=ob1, and it worked! Thank you very much
for your brilliant suggestion.
By the way, I don't really understand what do you mean by '/can you
also extract the command tha launch the test ?/'...
Cheers,
Pan
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