mpirun --prefix /opt/openmpi -mca oob_tcp_include eth0 -mca
btl_tcp_if_include eth0 --hostfile ~/work/openmpi_hostfile -np 4
hostname
Could a section be added to the FAQ mentioning that the firewall
service should be shutdown over the mpi interface and that the two
-mca switches should be used? This could perhaps be most useful to a
beginner in either the 'Running MPI Jobs' or 'Troubleshooting'
sections of the FAQ.
Mark, check this FAQ entry as well as #7 on the same page:
http://www.open-mpi.org/faq/?category=tcp#tcp-selection
And while you are waiting for your current jobs, you could try
something non-invasive but OMPI-ish nevertheless:
#include <stdio.h>
#include <mpi.h>
int main(int argc, char *argv[]) {
int numprocs, rank, namelen;
char processor_name[MPI_MAX_PROCESSOR_NAME];
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Get_processor_name(processor_name, &namelen);
printf("Process %d on %s out of %d\n", rank, processor_name, numprocs);
MPI_Finalize();
}
Have fun.
Alex.
