I am not sure. I have installed a few Ubuntu packages. mpicc and lamboot
were not in the same package though. Is there a way I can find out if my
mpicc/lam/etc are compatible or not?
Regards,
Al
On 10/10/07, Carsten Kutzner <ckutzne_at_[hidden]> wrote:
>
> Hi Al,
>
> this is what I get with your program on my machine:
>
> > lamboot
>
> LAM 7.1.4/MPI 2 C++/ROMIO - Indiana University
>
> > mpirun -v -np 5 mpiTest
> 14905 mpiTest running on n0 (o)
> 14906 mpiTest running on n0 (o)
> 14907 mpiTest running on n0 (o)
> 14908 mpiTest running on n0 (o)
> 14909 mpiTest running on n0 (o)
>
> [size is 5 and rank is 4]
>
> [size is 5 and rank is 2]
>
> [size is 5 and rank is 0]
>
> [size is 5 and rank is 1]
>
> [size is 5 and rank is 3]
> >
>
> Since the program works fine, I would guess that there may be something
> wrong whith your MPI environment. Have you checked that lamboot, mpicc
> and mpirun are all taken from the same directory (read: same LAM
> version?). Maybe something got mixed up there.
>
> Carsten
>
>
> Altu 59 wrote:
> > Hi Carsten,
> >
> > I have written a minimal MPI program that does nothing:
> >
> > #include "mpi.h"
> > #include <stdio.h>
> > #include <stdlib.h>
> > #include <string.h>
> >
> > int main(int argc, char* argv[]) {
> >
> > int my_id, other_id, size;
> > int length = 1, tag = 1;
> > int myvalue, othervalue;
> > MPI_Status satus;
> >
> > MPI_Init(&argc, &argv);
> > MPI_Comm_size(MPI_COMM_WORLD, &size);
> > MPI_Comm_rank(MPI_COMM_WORLD, &my_id);
> >
> > printf("\n[size is %d and rank is %d]\n", size, my_id);
> >
> > MPI_Finalize();
> >
> > return 0;
> > }
> >
> > I compile it like:
> >
> > mpicc -Wall -ansi -o mpiTest mpiTest.c
> >
> > Then I run it with:
> >
> > mpirun -v -np 5 mpiTest
> >
> > But it prints
> >
> > [size is 1 and rank is 0]
> > 21168 mpiTest running on n0 (o)
> >
> > [size is 1 and rank is 0]
> > 21169 mpiTest running on n0 (o)
> >
> > [size is 1 and rank is 0]
> > 21170 mpiTest running on n0 (o)
> >
> > [size is 1 and rank is 0]
> > 21171 mpiTest running on n0 (o)
> >
> > [size is 1 and rank is 0]
> > 21172 mpiTest running on n0 (o)
> >
> > followed by:
> >
> >
> -----------------------------------------------------------------------------
> > 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.
> >
> -----------------------------------------------------------------------------
> >
> > Any ideas what probably is the problem?
> >
> > Regards,
> > Al
> >
> > On 10/10/07, *Carsten Kutzner* <ckutzne_at_[hidden]
> > <mailto:ckutzne_at_[hidden]>> wrote:
> >
> > Altu 59 wrote:
> > > Hi,
> > >
> > > I want to write an MPI program that is comprised of 5 nodes.
> > > Can I test this with lam on one machine?
> > >
> > > How can I create 5 nodes on one machine? Is it even possible?
> > Hi Al,
> >
> > just boot LAM without arguments ('lamboot') and let mpirun know the
> > number of processes you want, e.g.
> >
> > mpirun -np 5 myprog.x
> >
> > That should do exactly what you want.
> > Carsten
> > _______________________________________________
> > This list is archived at http://www.lam-mpi.org/MailArchives/lam/
> >
> >
> >
> > ------------------------------------------------------------------------
> >
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