On Sep 2, 2007, at 5:04 AM, Maciej Marek wrote:
> mpif77 tmpi.f90 -o myprog
> (no errors, no warnings, executable created)
>
> I tried:
>
> mpirun -np 2 ./myprog
>
> and I got:
>
> ----------------------------------------------------------------------
> -------
> It seems that [at least] one of the processes that was started with
> mpirun did not invoke MPI_INIT before quitting (it is possible that
> more than one process did not invoke MPI_INIT -- mpirun was only
> notified of the first one, which was on node n0).
>
> mpirun can *only* be used with MPI programs (i.e., programs that
> invoke MPI_INIT and MPI_FINALIZE). You can use the "lamexec" program
> to run non-MPI programs over the lambooted nodes.
>
> ----------------------------------------------------------------------
> -------
>
> It seems that something really wrong happened, and the executable
> didn't even reach MPI_INIT. What could be the problem here?
Can you run with just one process? If not (and I'm guessing not),
can you try running under a debugger and seeing where the failure is
occurring? As long as you've already run lamboot, you should be able
to do something like:
gdb ./myprog
And run under a debugger to see where the failure occurs.
Brian
--
Brian Barrett
LAM/MPI Developer
Make today a LAM/MPI day!
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