On 5 October 2016 at 22:01, Mahdi, Sam <sam.mahdi....@my.csun.edu> wrote:
> Hi Troels,
>
> The mpirun --np 2 gave no output, so I had to abort the command, but here is
> the output.
> crowlab: [~]> python -c "import mpi4py; print mpi4py.__version__"
> 1.3.1
> crowlab: [~]> mpirun --np 2 python -c "from mpi4py import MPI; print
> MPI.COMM_WORLD.Get_rank()"
> ^Ccrowlab: [~]>
Hi Sam,
This result I'm pretty sure shows that mpi4py is not functioning
correctly - i.e. there is an installation problem. This is what you
should see:
[edward@localhost ~]$ mpirun --np 2 python -c "from mpi4py import MPI;
print MPI.COMM_WORLD.Get_rank()"
0
1
[edward@localhost ~]$
Note the printout of 0 and 1. Maybe try the following:
[edward@localhost ~]$ mpirun --np 5 python -c "import mpi4py; from
mpi4py import MPI; print('Mpi4py %s process %d of %d on %s.'
%(mpi4py.__version__,
MPI.COMM_WORLD.Get_rank(),MPI.COMM_WORLD.Get_size(),
MPI.Get_processor_name()))"
Mpi4py 1.3.1 process 0 of 5 on localhost.localdomain.
Mpi4py 1.3.1 process 1 of 5 on localhost.localdomain.
Mpi4py 1.3.1 process 4 of 5 on localhost.localdomain.
Mpi4py 1.3.1 process 2 of 5 on localhost.localdomain.
Mpi4py 1.3.1 process 3 of 5 on localhost.localdomain.
[edward@localhost ~]$
If you don't see a printout here, then clearly mpi4py and OpenMPI are
not working together correctly. Without a printout, your mpi4py is
FUBAR. Are you using the default OpenMPI and mpi4py packages form
fedora, and you don't have any backports or other non-standard sources
set up for your RPMs? Do you have any user installed MPI or mpi4py
software around? If you type:
$ locate mpi
What do you see? For me this is pretty clearly an installation problem.
Regards,
Edward
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