Writing a Multigrid Solver Using Co-array Fortran

摘要

Co-Array Fortran, known previously as F , is an extension to Fortran 95 that combines elegance of expression with simplicity of implementation to give an efficient parallel programming language. We illustrate its power and efficiency with a multigrid solver for Poisson's equation in three dimensions. We examine the effect of latency and bandwidth for the co-array version compared with an equivalent MPI version on two machines, the SGI/CRAY ORIGIN 2000 and the CRAY-T3E.