OpenMP: An Autotasking Perspective

This paper discusses the implementation of the new OpenMP standard for Fortran shared memory parallel processing in Programming Environment Release 3.1 for Cray PVP systems. Similarities and differences between OpenMP and Autotasking compiler directives, environment variables and other control mechanisms are discussed. It becomes clear that OpenMP provides equivalents for all of the essential features of current PVP Autotasking and Microtasking. The paper then discusses where users should be careful when converting Autotasked or Microtasked PVP codes to OpenMP and provides guidelines for the conversion