diff --git a/orte/mca/rmaps/base/help-orte-rmaps-base.txt b/orte/mca/rmaps/base/help-orte-rmaps-base.txt index db28a746cc..0d4724aeec 100644 --- a/orte/mca/rmaps/base/help-orte-rmaps-base.txt +++ b/orte/mca/rmaps/base/help-orte-rmaps-base.txt @@ -37,12 +37,11 @@ environment in which Open MPI processes are run: 1. Hostfile, via "slots=N" clauses (N defaults to number of processor cores if not provided) - 2. The --host:N command line parameter (N defaults to 1 if not - provided) + 2. The --host command line parameter, via a ":N" suffix on the + hostname (N defaults to 1 if not provided) 3. Resource manager (e.g., SLURM, PBS/Torque, LSF, etc.) - 4. If neither a hostfile, the --hosts command line parameter, nor an - RM is present, Open MPI defaults to the number of processor - cores + 4. If none of a hostfile, the --host command line parameter, or an + RM is present, Open MPI defaults to the number of processor cores In all the above cases, if you want Open MPI to default to the number of hardware threads instead of the number of processor cores, use the