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 _______________________________________________ users mailing list us...@open-mpi.org<mailto:us...@open-mpi.org> http://www.open-mpi.org/mailman/listinfo.cgi/users _______________________________________________ users mailing list us...@open-mpi.org<mailto:us...@open-mpi.org> http://www.open-mpi.org/mailman/listinfo.cgi/users _______________________________________________ users mailing list us...@open-mpi.org<mailto:us...@open-mpi.org> http://www.open-mpi.org/mailman/listinfo.cgi/users -- [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>
