OpenMPI will do this on its own. As shared memory in its mind is
preferable to tcp. We can measure the difference here on the same
kind of system (Sun x4600). If you want to force omitting tcp
(should not be needed) run like this:
mpirun --mca btl ^tcp -np 8 ./a.out
Brock Palen
Center
We just got a 8 cpu machine with 64GB of memory. I've been told it
would be advantageous to run MPI codes with shared memory and not use
TCP sockets
for this new machine.
How do I do this with OPENMPI.
Thanx,
Bernie Borenstein
The Boeing Company
