I am trying to send a MPI job to selected cores on a 64 cores machine. With
taskset I use:
mpirun -np 8 taskset -c 1,3,5,7,9,11,13,15 program
but if I substitute taskset by hwloc-bind doing
mpirun -np 8 hwloc-bind core:1 core:3 core:5 core:7 core:9 core:11 core:13
core:15 program
it does not work. In the following thread:
http://www.open-mpi.org/community/lists/hwloc-users/2011/02/0277.php
The answer was:
"Each hwloc-bind command in the mpirun above doesn't know that there
are other hwloc-bind instances on the same machine. All of them bind
their process to all cores in the first socket. "
Is there something wrong if I do:
hwloc-bind core:1 core:3 core:5 core:7 core:9 core:11 core:13 core:15 mpirun -
np 8 program
Is the an easier way to tell mpirun the individual cores?
Thanks a lot.
--
Dr. Rafael R. Pappalardo
Dept. Quimica Fisica, Fac. de Quimica, Univ. de Sevilla (Spain)
e-mail: rafapa_at_[hidden]
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