Re: mpi + shmem issues

On Sun, May 25, 2003 at 05:17:30PM -0400, Anthony Schneider wrote:
> additional information:
> 
> when recompiling mpich for debugging symbols, configure fails on:
> checking that usable shared memory locks were found... no
> 
> so, does this mean that mpich somehow exhausted all shmem locks?
> after running the program only 10 times, i see this as infeasible,
> considering
> 	a) mpich (presumably in MPI_Init()) would only want 1 or
> 	   2 locks on init
> and
> 	b) any shared memory locks mpich grabs should be freed
> 	   upon process completion (whether clean or not) by the
> 	   operating system, no?
> 

ALWAYS remember to call MPI_Finalize(), since it clears up stuff like
semaphores and memory allocations.

> > #include <mpi.h>
> > #include <stdio.h>
> > 
> > int main (int argc, char *argv[]) {
> >         int mpiRank, mpiSize;
> > 
> >         MPI_Init (&argc, &argv);
> >         MPI_Comm_rank (MPI_COMM_WORLD, &mpiRank);
> > 
> >         printf ("#%d here\n", mpiRank);
> > 

   MPI_Finalize();

> >         return 0;
> > 
> > }
> > 
> 


-- 
Morten Rodal