Great. That suggests mpirun is OMPI, as you suggested it was, and that
the different process ranks are being set up correctly by mpirun.
But can you also confirm that you're using the OMPI mpicc or mpif90?
Invoke the mpicc with a full path name, perhaps -- that is,
/usr/users/pankatz/OPENmpi/bin/mpicc -- or stick a
#ifdef OPEN_MPI
printf("using Open MPI\n");
#else
printf("not using Open MPI\n");
#endif
into your source code.
Pankatz, Klaus wrote:
Allright, I've ran a mpirun -np 4 env. And I see OMPI_COMM_WORLD_RANK
0 to 3. So far so good.
OMPI_COMM_WORLD_SIZE=4 everytime, I think thats correct.
OMPI_MCA_mpi_yield_when_idle=0 everytime zero
OMPI_MCA_orte_app_num=0 everytime zero
Am 23.04.2010 um 14:54 schrieb Terry Dontje:
Ok can you do an "mpirun -np 4 env" you should
seeOMPI_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?
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
