This is a Fortran 90 port of the Mantevo HPCCG SpMVM benchmark.

You find the original (C++) implementation here:

https://mantevo.org/download.php

There are three different variants:

MPI  Contains a OpenMP/MPI/MPI+OpenMP implementation
CAF-V1  Contains a naive CoArray Fortran implementation (optional use MPI for collectives)
CAF-V2  Contains a MPI like CoArray Fortran implementation (optional use MPI for collectives)