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
