+1 In addition, you might want to upgrade to Open MPI 1.6.x -- 1.4.x is fairly ancient. 1.6.x's mpirun also has a --report-bindings option which tells you where procs are bound. For example:
mpirun --bind-to-core --report-bindings ...etc. On Feb 15, 2013, at 11:46 AM, Brice Goglin <brice.gog...@inria.fr> wrote: > IntelMPI binds processes by default, while OMPI doesn't. What's your > mpiexec/mpirun command-line? > > Brice > > > > Le 15/02/2013 17:34, Kranthi Kumar a écrit : >> Hello Sir >> >> Here below is the code which I wrote using hwloc for getting the bindings of >> the processes. >> I tested this code on SDSC Gordon Super Computer which has Open MPI 1.4.3 >> and on TACC Stampede which uses intel's MPI library IMPI. >> With Open MPI I get all the core ids for all the processes as 0. Using Intel >> MPI library I get different coreids. I tried even binding the processes >> in the command line using taskset. Open MPI gives me core id 0 for all the >> processes whereas IMPI gives me correct bindings. >> Please look into this >> >> >> #include <stdio.h> >> #include <sched.h> >> #include <math.h> >> #include "mpi.h" >> #include <hwloc.h> >> int main(int argc, char* argv[]) >> { >> int rank, size; >> cpu_set_t mask; >> long num; >> int proc_num(long num); >> >> hwloc_topology_t topology; >> hwloc_cpuset_t cpuset; >> hwloc_obj_t obj; >> >> MPI_Init(&argc, &argv); >> MPI_Comm_rank(MPI_COMM_WORLD, &rank); >> MPI_Comm_size(MPI_COMM_WORLD, &size); >> >> hwloc_topology_init ( &topology); >> hwloc_topology_load ( topology); >> >> hwloc_bitmap_t set = hwloc_bitmap_alloc(); >> hwloc_obj_t pu; >> int err; >> >> err = hwloc_get_proc_cpubind(topology, getpid(), set, >> HWLOC_CPUBIND_PROCESS); >> if (err) { >> printf ("Error Cannot find\n"), exit(1); >> } >> >> pu = hwloc_get_pu_obj_by_os_index(topology, hwloc_bitmap_first(set)); >> printf ("Hello World, I am %d and pid: %d >> coreid:%d\n",rank,getpid(),hwloc_bitmap_first(set)); >> >> hwloc_bitmap_free(set); >> MPI_Finalize(); >> fclose(stdout); >> return 0; >> } >> Thank You >> -- >> Kranthi >> >> _______________________________________________ >> users mailing list >> >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/