1. Cray MPI.
https://pubs.cray.com/content/S-2529/17.05/xctm-series-programming-environment-user-guide-1705-s-2529/mpt
2. IBM Spectrum MPI.
https://tinyurl.com/yy9cwm4p
3. MPI/Pro.
https://www.runtimecomputing.com/products/mpipro/
4. Osu micro-benchmarks 5.6.2.
http://mvapich.cse.ohio-state.edu/benchmarks/
5. Intel MPI library, August 2018.
https://software.intel.com/en-us/mpi-library