viktorooreps / skpod

Determinant computation with OpenMP and MPI

Usage

Use flag --help for the list of all available options and --mpi to compile for MPI.

On MSU Polus machine

module load SpectrumMPI

python3 run_polus.py [NUMBER OF PROCESSES OR THREADS] --src_file /path/to/src.c (--mpi)

On MSU BlueGene machine

MPI version does not work though due to the usage of group communications (as of 2021). Maybe BlueGene moderators will consider switching to newer MPI versions in future years.

python3.3 run_bluegene.py [NUMBER OF PROCESSES OR THREADS] --src_file /path/to/src.c (--mpi)

OpenMP parallelized determinant computation

MPI parallelized determinant computation

Conclusion

Process parallelization comes with a lot of process communincation related computation losses so it is not reasonable to use it on smaller matrices. On larger matrices though it achieves better level of parallelization.