Ok can you do an "mpirun -np 4 env" you should see OMPI_COMM_WORLD_RANK
range 0 thru 3. I am curious if you even see OMPI_* env-vars and if you
do is this one 0 for all procs?
--td
Pankatz, Klaus wrote:
Yeah, I sure that I use the right mpirun.
which mpirun leads to /usr/users/pankatz/OPENmpi/bin/mpirun which is the right
one.
________________________________________
Von: users-boun...@open-mpi.org [users-boun...@open-mpi.org] im Auftrag von
Terry Dontje [terry.don...@oracle.com]
Gesendet: Freitag, 23. April 2010 14:29
An: Open MPI Users
Betreff: Re: [OMPI users] mpirun -np 4 hello_world; on a eight processor shared
memory machine produces wrong output
This looks like you are using an mpirun or mpiexec from mvapich to run an
executable compiled with OMPI. Can you make sure that you are using the right
mpirun?
--td
Pankatz, Klaus wrote:
Yes, I did that.
It ist basically the same problem with a Fortran version of this little
program. With that I used the mpif90 command of openMPI.
________________________________________
Von: users-boun...@open-mpi.org<mailto:users-boun...@open-mpi.org>
[users-boun...@open-mpi.org<mailto:users-boun...@open-mpi.org>] im Auftrag von Reuti
[re...@staff.uni-marburg.de<mailto:re...@staff.uni-marburg.de>]
Gesendet: Freitag, 23. April 2010 14:15
An: Open MPI Users
Betreff: Re: [OMPI users] mpirun -np 4 hello_world; on a eight processor
shared memory machine produces wrong output
Hi,
Am 23.04.2010 um 14:06 schrieb Pankatz, Klaus:
Hi all,
there's a problem with openMPI on my machine. When I simply try to run this
little hello_world-program on multiple processors, the output isn't as expected:
*****
C code:
#include <mpi.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char **argv)
{
int size,rank;
char hostname[50];
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank); //Who am I?
MPI_Comm_size(MPI_COMM_WORLD, &size); //How many processes?
gethostname (hostname, 50);
printf ("Hello World! I'm number %2d of %2d running on host %s\n",
rank, size, hostname);
MPI_Finalize();
return 0;
}
****
Command: mpirun -np 4 a.out
the mpirun (better, use: mpiexec) is the one from the Open MPI, and you also
used its version mpicc to compile the program?
-- Reuti
Output:
Hello World! I'm number 0 of 1 running on host marvin
Hello World! I'm number 0 of 1 running on host marvin
Hello World! I'm number 0 of 1 running on host marvin
Hello World! I'm number 0 of 1 running on host marvin
It should be more or less:
Hello World! I'm number 1 of 4 running on host marvin
Hello World! I'm number 2 of 4 running on host marvin
....
OpenMPI-version 1.4.1 compiled with Lahey Fortran 95 (lf95).
OpenMPI was compiled "out of the box" only changing to the Lahey compiler with
a setenv $FC lf95
The System: Linux marvin 2.6.27.6-1 #1 SMP Sat Nov 15 20:19:04 CET 2008 x86_64
GNU/Linux
Compiler: Lahey/Fujitsu Linux64 Fortran Compiler Release L8.10a
Thanks very much!
Klaus
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--
[cid:part1.05010106.04050301@oracle.com]
Terry D. Dontje | Principal Software Engineer
Developer Tools Engineering | +1.650.633.7054
Oracle - Performance Technologies
95 Network Drive, Burlington, MA 01803
Email terry.don...@oracle.com<mailto:terry.don...@oracle.com>
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--
Oracle
Terry D. Dontje | Principal Software Engineer
Developer Tools Engineering | +1.650.633.7054
Oracle * - Performance Technologies*
95 Network Drive, Burlington, MA 01803
Email terry.don...@oracle.com <mailto:terry.don...@oracle.com>
