According to the error message you are using MPICH not Open MPI.
George.
On Tue, Jan 14, 2020 at 5:53 PM 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
>
