dolfin team mailing list archive

[Johan Hake <hake@xxxxxxxxx>]

On Friday 18 September 2009 15:43:34 KVS wrote:
> Public bug reported:
> 
> Hi,
> I just build FEniCS with Dorsal and tried to run the poisson.py demo.
> Running "python demo.py" works fine, but "mpirun -n 2 python demo.py" does
>  not. See text below. Is there an easy fix?

What version of linux do you use?

This looks like the same problem I had a while ago (with jaunty), where mpirun 
use ssh to submit the different jobs. The problem is that the script is 
executed without the necessary paths. You need to forward these.

My workaround was to set the following alias:

  alias mpirun='mpirun -x PYTHONPATH -x LD_LIBRARY_PATH -x PKG_CONFIG_PATH\
    -x PATH -x DISPLAY'

you might also need to put:

Host *
ForwardAgent yes
ForwardX11 yes

in your .ssh/config file to get plotting to work.

Johan
 
> Kristian
> 
> kvs@flekktvetann:~/fenics/dolfin/demo/pde/poisson/python$ python demo.py
> Solving linear variational problem
>   Matrix of size 1089 x 1089 has 7361 nonzero entries.
>   Applying boundary conditions to linear system.
>   Solving linear system of size 1089 x 1089 (PETSc LU solver, petsc).
> Plot active, press 'q' to continue.
> 
> kvs@flekktvetann:~/fenics/dolfin/demo/pde/poisson/python$ mpirun -n 2
>  python demo.py kvs@flekktvetann's password:
> Traceback (most recent call last):
>   File "demo.py", line 20, in <module>
>     from dolfin import *
> ImportError: No module named dolfin
> Traceback (most recent call last):
>   File "demo.py", line 20, in <module>
>     from dolfin import *
> ImportError: No module named dolfin
> 
> ** Affects: dolfin
>      Importance: Undecided
>          Status: New
>

-- 
Poisson demo in parallel
https://bugs.launchpad.net/bugs/432491
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Status in DOLFIN: New

Bug description:
Hi, 
I just build FEniCS with Dorsal and tried to run the poisson.py demo.
Running "python demo.py" works fine, but "mpirun -n 2 python demo.py" does not.
See text below. Is there an easy fix?

Kristian

kvs@flekktvetann:~/fenics/dolfin/demo/pde/poisson/python$ python demo.py
Solving linear variational problem
  Matrix of size 1089 x 1089 has 7361 nonzero entries.
  Applying boundary conditions to linear system.
  Solving linear system of size 1089 x 1089 (PETSc LU solver, petsc).
Plot active, press 'q' to continue.

kvs@flekktvetann:~/fenics/dolfin/demo/pde/poisson/python$ mpirun -n 2 python demo.py
kvs@flekktvetann's password: 
Traceback (most recent call last):
  File "demo.py", line 20, in <module>
    from dolfin import *
ImportError: No module named dolfin
Traceback (most recent call last):
  File "demo.py", line 20, in <module>
    from dolfin import *
ImportError: No module named dolfin