I am going to create a program which realizes one heuristic algorithm, i.e. program launches 4 process (on one, single computer) which realize algorithm, then aggregates results from 4 process and choose best result. That in future. I met problems with installation(?) OpenMPI. I am using Ubuntu. First, I have installed OpenMPI using instructions from this site:
http://www.simunano.com/2015/07/how-to-install-openmpi.html Then I made programs from /openmpi-3.0.0/examples/ and tried to launch a program, I am posting below what I have received: czarek@czarek-Inspiron-5558:~/openmpi-3.0.0/examples$ mpiexec -n 4 ./hello_c *** An error occurred in MPI_Init *** on a NULL communicator *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort, *** and potentially your MPI job) [czarek-Inspiron-5558:2456] Local abort before MPI_INIT completed completed successfully, but am not able to aggregate error messages, and not able to guarantee that all other processes were killed! ------------------------------------------------------- Primary job terminated normally, but 1 process returned a non-zero exit code.. Per user-direction, the job has been aborted. ------------------------------------------------------- -------------------------------------------------------------------------- mpiexec detected that one or more processes exited with non-zero status, thus causing the job to be terminated. The first process to do so was: Process name: [[25779,1],0] Exit code: 1 -------------------------------------------------------------------------- I have found an advice, that I should reinstall OpenMPI. I have simply move to trash folder /openmpi/ and I have installed OpenMPI using instructions from this site: http://lsi.ugr.es/jmantas/pdp/ayuda/datos/instalaciones/Install_OpenMPI_en.pdf Then I made programs from new folder /openmpi-3.0.0/examples/ and tried to launch a program, with the same results like previous. Sometimes, after launching, this error "was cloned" and was displayed 2 - 4 times (maybe the error appeared for more than 1 process). What I have done to overcome the error: * reinstallation (like mentioned above) * I found an advice that maybe environmental variables are added twice. Indeed, but I have repaired that, now I have: czarek@czarek-Inspiron-5558:~$ echo $PATH /home/czarek/bin:/home/czarek/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/czarek/.openmpi/bin czarek@czarek-Inspiron-5558:~$ echo $LD_LIBRARY_PATH /home/czarek/.openmpi/lib * sudo apt-get update, didn't help I would like to add, that I have configured IDE - CodeBlocks to compile OpenMPI using instructions from site below: https://pl.scribd.com/document/210457973/How-to-Run-MPI-Under-CodeBlocks I have created a new project, copied code from helo_c to the project, compiled (without errors) and run: Hello, world, I am 0 of 1, (Open MPI v3.0.0, package: Open MPI czarek@czarek-Inspiron-5558 Distribution, ident: 3.0.0, repo rev: v3.0.0, Sep 12, 2017, 122) But I think that it was simply launched on a single process. Could You tell me what should I do to run OpenMPI programs successfully? Further informations: OpenMPI 3.0.0 from openmpi-3.0.0.tar.gz ubuntu 16.10 Cheers, Czarek Kowalski _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
