Advanced MPI scheduling: Difference between revisions

It is important to understand that the number of ''tasks'' requested of Slurm is the number of ''processes'' that will be started by <code>srun</code>. So for a hybrid job that will use both MPI processes and lightweight processes such as OpenMP threads or Posix threads, you should set the MPI process count with <code>--ntasks</code> or <code>-ntasks-per-node</code>, and set the thread count with <code>--cpus-per-task</code>.