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On Fri, Sep 18, 2009 at 01:57:19PM -0000, Johan Hake wrote:
> 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

I still find it strange you need to do this. Is this a bug that has
been fixed in Karmic? Which MPI packages do you have?

  # dpkg -l | grep mpi | grep -v ompiz | grep -v ompil | grep -v empi |
awk '{print $2, $3}'

  libopenmpi-dev 1.3.2-3ubuntu1
  libopenmpi1.3 1.3.2-3ubuntu1
  mpi-default-bin 0.6
  openmpi-bin 1.3.2-3ubuntu1
  openmpi-common 1.3.2-3ubuntu1
  python-mpi 2.4.11-2ubuntu3

--
Anders


> > 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