Leveraging OpenCoarrays to Support Coarray Fortran on IBM Power8E

Abstract

We include a few comparisons between the performance a competent application developer would attain with two-sided MPI communication and the performance achieved with the newer MPI 3.0 one-sided communication that OpenCoarrays generates from CAF programs. We also demonstrate the OpenCoarrays support for the parallel collective subroutines that have been proposed for the upcoming Fortran 2015 standard.