Comments on: Parallel and cluster computing with MPI4Py http://blog.mikael.johanssons.org/archive/2008/05/parallell-and-cluster-mpi4py/ Because my LiveJournal is too silly Mon, 15 Mar 2010 18:50:59 +0100 http://wordpress.org/?v=2.8.6 hourly 1 By: Tibo's wiki: Mpi http://blog.mikael.johanssons.org/archive/2008/05/parallell-and-cluster-mpi4py/comment-page-1/#comment-155579 Tibo's wiki: Mpi Sat, 31 Jan 2009 22:28:27 +0000 http://blog.mikael.johanssons.org/?p=168#comment-155579 [...] in sage complete tutorial on how to use MPI page tags: fortran mpi python help | terms of service | privacy | report a bug [...] [...] in sage complete tutorial on how to use MPI page tags: fortran mpi python help | terms of service | privacy | report a bug [...]

]]> By: Sara http://blog.mikael.johanssons.org/archive/2008/05/parallell-and-cluster-mpi4py/comment-page-1/#comment-153453 Sara Sun, 11 Jan 2009 20:19:33 +0000 http://blog.mikael.johanssons.org/?p=168#comment-153453 Hello Michi, I'm a student learning to use MPI4py. I'm trying to run a this simple program: from mpi4py import MPI import sys hwmess = "Hello, World!! I am process %d of %d.\n" myrank = MPI.COMM_WORLD.Get_rank() nprocs = MPI.COMM_WORLD.Get_size() sys.stdout.write(hwmess % (myrank, nprocs)) by the command: mpirun -np 5 filename.py then I get 5 prints: Hello, World!! I am process 0 of 1. Do you have any idea why such thing might happen? Thank you, Hello Michi,

I’m a student learning to use MPI4py.
I’m trying to run a this simple program:
from mpi4py import MPI
import sys

hwmess = “Hello, World!! I am process %d of %d.\n”
myrank = MPI.COMM_WORLD.Get_rank()
nprocs = MPI.COMM_WORLD.Get_size()
sys.stdout.write(hwmess % (myrank, nprocs))
by the command:
mpirun -np 5 filename.py
then I get 5 prints:
Hello, World!! I am process 0 of 1.

Do you have any idea why such thing might happen?

Thank you,

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