Thanks gentlemen,
Right lets change the code a little bit:
cat hi.c
#include <stdio.h>
#include "mpi.h"
int main(int argc, char *argv[])
{
int numprocs, myid;
MPI_Status status;
MPI_Init(&argc,&argv);
MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
MPI_Comm_rank(MPI_COMM_WORLD,&myid);
printf("hiho! from processor %d of %d.\n",myid,numprocs);
MPI_Finalize();
}
it works on 32 bit CPUs running LAM 6.5.6/MPI 2 C++/ROMIO - University of Notre
Dame
in that way:
>> mpirun -np 4 ./hi32
hiho! from processor 1 of 4.
hiho! from processor 0 of 4.
hiho! from processor 2 of 4.
hiho! from processor 3 of 4.
and on 64 bit CPUs running LAM 7.1.1/MPI 2 C++/ROMIO - Indiana University
>> mpirun -np 4 ./hi64
-----------------------------------------------------------------------------
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.
-----------------------------------------------------------------------------
Further suggestions?
Thanks in advance!
Stephan
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