Hi,
I'm trying to use option -ppn (or -perhost) with Hydra and LSF 9.1 but It doesn't work (nodes have 16 cores):
$ bsub -q q_32p_1h -I -n 32 mpirun -perhost 8 -np 16 ./a.out
Job <750954> is submitted to queue <q_32p_1h>.
<<Waiting for dispatch ...>>
<<Starting on mn3>>
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
Hello world!I'm 0 of 1 on mn3
my Intel MPI version is 5.0.2
I tried to fix this problem some years ago. At that time, the answer was upgrade Intel MPI because it should have a better LSF support ...