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--- openmpi [2022/03/25 17:26] – created nico
+++ openmpi [2022/03/25 17:50] (current) – nico
@@ Line 1: / Line 1: @@
 ====== Submit your OpenMPI job with SLURM ======
-OpenMPI is built on Magi with SLURM support. To use OpenMPI, you must load the correspondig [[modules|module]]. Feel free to browse the /softs/modules/compiled/gcc/<gcc_version>/openmpi/ to check available versions of OpenMPI.
+OpenMPI is built on Magi with SLURM support. To use OpenMPI, you must load the correspondig [[modules|module]]. Feel free to browse the /softs/modules/compiled/gcc/<gcc_version>/openmpi/ to check available versions of OpenMPI. For example :
+   nicolas.greneche@magi3:~$ module load /softs/modules/compiled/gcc/10.2.1/openmpi/4.1.2
+Then, you can compile your OpenMPI codes :
+   nicolas.greneche@magi3:~$ mpicc -o hellompi hellompi.c
+The last step is to write a submission script for slurm (here run.slurm) :
+   #!/bin/bash
+   #SBATCH --job-name=hello
+   #SBATCH --output=slurm.out
+   #SBATCH --error=slurm.err
+   #SBATCH --mail-type=end
+   #SBATCH --mail-user=nicolas.greneche@univ-paris13.fr
+   #SBATCH --nodes=2
+   #SBATCH --ntasks-per-node=2
+   srun ./hellompi
+You can refer to this [[submission_script|documentation]] for more informations on job submission. This run an OpenMPI job on two nodes (--nodes=2) with two tasks per node (--ntasks-per-node=2). it leads to a total of four MPI process (or workers).