[MPICH] help MPICH & matlab

[David Ashton]

You can add the -localroot option to mpiexec to allow processes on the local
machine to bring up visible windows.

You might want to post the error output from mpiexec to get help on why
spawn doesn't work.  The MPI-2 functions in MPICH2 have undergone
significant development and will probably be more stable in the next
release.

Can you run an MPI application that calls MPI_Comm_spawn but is not inside
MATLAB?  Sample applications known to work can be found in the
mpich2\test\mpi\spawn directory of the MPICH2 source distribution.

-David Ashton

-----Original Message-----
From: owner-mpich-discuss at mcs.anl.gov
[mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of llwaeva at 21cn.com
Sent: Friday, September 23, 2005 12:45 AM
To: mpich-discuss at mcs.anl.gov
Subject: [MPICH] help MPICH & matlab

Hi there,
  I am new to MPICH. I read the document of MPICH and know that one can
spawn processes with mpiexec. I am running win2k and MPICH2 for windows.
I try to mpiexec a matlab which will run a simple code after
initialization

mpiexec -n 1 matlab -nojvm -nosplash /r test

where test(.m) is the matlab problem in which I have

A=1:100;
B=A'+A;

The code is so simple so everything is all right. However, if I modified
the code and add a plotting function like

A=1:100;
B=A'+A;
plot(A,B);

Although no error occurred, but the plotting function doesn't work!!! I
have also try other GUI program rather than matlab, all the GUI seems to
be banned! Would you please tell me the reason and how to solve it?

Next, I would like to ask something about MPI_Comm_spawn, I have write a
C program in which a new function called spawn is written to wrap
MPI_Comm_spawn. In matlab, I try to call my 'spawn' to spawn a new
process, but matlab will shutdown abnormally whenever spawn is called !!!