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: raf...@us.es
