Hiho,
a simple C code:
>> cat hi.c
#include <stdio.h>
#include "mpi.h"
int main(int argc, char *argv[])
{
char greet[12];
int i, numprocs, myid;
MPI_Status status;
MPI_Init(&argc,&argv);
MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
MPI_Comm_rank(MPI_COMM_WORLD,&myid);
if(myid == 0)
{
sprintf(greet,"Hello world");
}
printf("%s from processor %d of %d.\n",&greet,myid,numprocs);
MPI_Finalize();
}
executed by:
mpirun -np 4 ./hi
Hello world from processor 0 of 1.
-----------------------------------------------------------------------------
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.
-----------------------------------------------------------------------------
while lamboot worked fine:
lamboot -v lamboot.amd
LAM 7.1.1/MPI 2 C++/ROMIO - Indiana University
n-1<19857> ssi:boot:base:linear: booting n0 (jakarta)
n-1<19857> ssi:boot:base:linear: booting n1 (cairo)
n-1<19857> ssi:boot:base:linear: booting n2 (kyoto)
n-1<19857> ssi:boot:base:linear: booting n3 (tucson)
n-1<19857> ssi:boot:base:linear: finished
The number of procs should be 4 and it shouldn't hang, or?
Thanks for your help!
Stephan
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