Le 12/09/2011 14:17, Gabriele Fatigati a écrit : > Mm, and why? In a hybrid code ( MPI + OpenMP), my idea is to bind a > single MPI process in one core, and his threads in other cores. > Otherwise I have all threads that runs on a single core. >
The usual way to do that is to first bind the entire process to all cores available to all its thread and then bind each thread to a single core. For instance, if doing Open MPI + OpenMP with one process per socket * you pass --bind-to-socket on the mpirun/mpiexec command-line * when the MPI process starts, the OpenMP runtime calls something like get_cpubind to find out how many cores were given to it * it creates the exact same number of OpenMP threads and bind one of them on each core Brice
