[pooma-dev] Pooma/Cheetah and MPI

[James Crotinger]

I believe Cheetah is still being actively developed at LANL. Check the
readme files in the Cheetah distribution - there should be some contact
information there somewhere. You might also check the www.acl.lanl.gov page.


	Jim


>-----Original Message-----
>From: Richard Guenther [mailto:rguenth at tat.physik.uni-tuebingen.de]
>Sent: Thursday, May 02, 2002 9:05 AM
>To: pooma-dev at pooma.codesourcery.com
>Subject: [pooma-dev] Pooma/Cheetah and MPI
>
>Hi!
>
>I tried to use MPI to parallelize a pooma application and stumbeled
>over the following problem:
>
>A simple mpirun -np 4 myprog -mpi does not work, the first process
>gets spawned, but just runs as in uniprocessor mode. The problem is,
>the spawned processes dont get the -mpi parameter and such dont
>call MPI_Init.
>
>The problem is in Cheetah ControllerFactory::create which _removes_
>the controller argument (-mpi) from the argument list and as such
>the master MPI_Init and any further MPI_Init's dont see it.
>
>I worked around this by manually re-inserting -mpi to the arguments
>list in my program, but of course this is not a solution to the problem.
>A fix would be to move the argument removal in Cheetah to _after_ the
>MPI_Init call.
>
>Anyone with a different solution to the problem? I'll happily contribute
>the above suggestion, if nobody has a fix already.
>
>Richard.
>
>--
>Richard Guenther <richard.guenther at uni-tuebingen.de>
>WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/
>The GLAME Project: http://www.glame.de/
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