blacs-mpi-test binary package in Ubuntu Bionic arm64

 The BLACS project is an ongoing investigation whose purpose is to
 create a linear algebra oriented message passing interface that may be
 implemented efficiently and uniformly across a large range of
 distributed memory platforms.
 .
 You can choose between an implementation based on MPI or PVM. This package
 uses MPI. There are packages for the shared libraries, for the static
 libraries and the development files, and for test programs (this one).
 .
 Most users do not need to install this package directly because it contains
 test programs for the BLACS libraries. You only need these if you experience
 problems with ScaLAPACK. The BLACS libraries are used as a high level
 communications library for ScaLAPACK. ScaLAPACK is a parallel version of
 LAPACK and is used on Beowulf type clusters.

Source package