Soporte, The error message is from MPICH!
If you intend to use Open MPI, fix your environment first Cheers, Gilles Sent from my iPod > On Jan 15, 2020, at 7:53, SOPORTE MODEMAT via users > <users@lists.open-mpi.org> wrote: > > Hello everyone. > > I would like somebody help me to figure out how can I make that the openmpi > use the infiniband interface that I specify with the command: > > /opt/mpi/openmpi_intel-2.1.1/bin/mpirun --mca btl self,openib python > mpi_hola.py > > But when I print the hostname and the ip address of the interface by the > python script, it shows the ethernet interface: > > # Ejemplo de mpi4py > # Funcion 'Hola mundo' > > from mpi4py import MPI > import socket > > ##print(socket.gethostname()) > > comm = MPI.COMM_WORLD > rank = comm.Get_rank() > size = comm.Get_size() > > print('Hola mundo') > print('Proceso {} de {}'.format(rank, size)) > > host_name = socket.gethostname() > host_ip = socket.gethostbyname(host_name) > print("Hostname : ",host_name) > print("IP : ",host_ip) > > The output is: > > > Hola mundo > Proceso 0 de 1 > Hostname : apollo-2.private > IP : 10.50.1.253 > Hostname : apollo-2.private > IP : 10.50.1.253 > Hostname : apollo-2.private > IP : 10.50.1.253 > Hostname : apollo-2.private > IP : 10.50.1.253 > > But the node has already the infiniband interface configured on ib0 with > another network. > > I would like you to give me some advice to make this script use the > infiniband interface that is specified via mpi. > > When I run: > > mpirun --mca btl self,openib ./a.out > > > I get this error that confirm that mpi is using the ethernet interface: > > [mpiexec@apollo-2.private] match_arg (./utils/args/args.c:122): unrecognized > argument mca > [mpiexec@apollo-2.private] HYDU_parse_array (./utils/args/args.c:140): > argument matching returned error > [mpiexec@apollo-2.private] parse_args (./ui/mpich/utils.c:1387): error > parsing input array > [mpiexec@apollo-2.private] HYD_uii_mpx_get_parameters > (./ui/mpich/utils.c:1438): unable to parse user arguments > > Usage: ./mpiexec [global opts] [exec1 local opts] : [exec2 local opts] : ... > > Global options (passed to all executables): > > > Additional Information: > > ll /sys/class/infiniband: mlx5_0 > > /sys/class/net/ > total 0 > lrwxrwxrwx 1 root root 0 Jan 14 12:03 eno49 -> > ../../devices/pci0000:00/0000:00:02.0/0000:07:00.0/net/eno49 > lrwxrwxrwx 1 root root 0 Jan 14 17:17 eno50 -> > ../../devices/pci0000:00/0000:00:02.0/0000:07:00.1/net/eno50 > lrwxrwxrwx 1 root root 0 Jan 14 17:17 eno51 -> > ../../devices/pci0000:00/0000:00:02.0/0000:07:00.2/net/eno51 > lrwxrwxrwx 1 root root 0 Jan 14 17:17 eno52 -> > ../../devices/pci0000:00/0000:00:02.0/0000:07:00.3/net/eno52 > lrwxrwxrwx 1 root root 0 Jan 14 17:17 ib0 -> > ../../devices/pci0000:00/0000:00:01.0/0000:06:00.0/net/ib0 > lrwxrwxrwx 1 root root 0 Jan 14 17:17 ib1 -> > ../../devices/pci0000:00/0000:00:01.0/0000:06:00.0/net/ib1 > lrwxrwxrwx 1 root root 0 Jan 14 17:17 lo -> ../../devices/virtual/net/lo > > > The operating system is Linux Centos 7. > > > Thank you in advance for your help. > > Kind regards. > > Soporte.modemat