I have openmpi installed and running, but have a need to run non mpi programs (3rd party software for which I don’t have the source) together with mpi programs.
Have managed to simplify the problem down to the following
printf(“JobA Init done\n”);
And running with
mpirun -mca btl tcp,self,sm -np 1 -host lyre JobA : -np 1 -host lyre JobB
The output is the two messages “Starting …” message and then hangs.
It would appear that the MPI::Init() is waiting for all Ranks to call MPI::Init() before continuing.
Please note the above works as expected if we run either two JobAs or two JobBs. Only have a problem if there is a mixture of JobAs and JobBs.
Is there a way around this problem?
Thanks in advance Neville