Svm Support in the Vienna Fortran Compilation System

Vienna Fortran, a machine-independent language extension to Fortran which allows the user to write programs for distributed-memory systems using global addresses, provides the forall loop construct for specifying irregular computations that do not cause inter-iteration dependences. Compilers for distributed-memory systems cannot generate eecient code for such loops using compile-time techniques only. This paper presents the runtime message passing implementation and the SVM implementation. We compare both approaches and present rst performance results for a realistic loop.