Python libraries interfacing different mpi implementations.

Originally created by the HPC team of Ghent University.

vsc-mympirun is made available under the GNU General Public License (GPL) version 2.

The first step of mympirun is making sure that every mpirun command passes through mympirun. This is accomplished by prepending a fake mpirun path to $PATH, which will catch the attempt to execute mpirun and forward it to mympirun.

Next, the script will import every MPI flavor implementation from lib/vsc/mympirun/mpi. This way it is possible to deduce the MPI flavor that is requested by observing the path of the executable that called mympirun.

It will follow the same process for determining the scheduler. Both MPI flavor and scheduler flavor can be overwritten by using the -M and -S options respectively.

Once both flavors have been set, the script will get some standard MPI configuration variables, such as usable nodes, netmask,... It will handle CPU pinning if enabled.

After setting up, it will transform the command line arguments and other global environment variables to a dict with options that the chosen MPI flavor can understand.

Finally, it passes these options to the correct mpirun executable of the selected MPI flavor.