What multilevel parallel programs do when you are not watching: a performance analysis case study comparing MPI/OpenMP, MLP, and nested OpenMP

  • Authors:
  • Gabriele Jost;Jesús Labarta;Judit Gimenez

  • Affiliations:
  • NAS Division, NASA Ames Research Center, CA;European Center for Parallelism of Barcelona-Technical, University of Catalonia (CEPBA-UPC), Barcelona, Spain;European Center for Parallelism of Barcelona-Technical, University of Catalonia (CEPBA-UPC), Barcelona, Spain

  • Venue:
  • WOMPAT'04 Proceedings of the 5th international conference on OpenMP Applications and Tools: shared Memory Parallel Programming with OpenMP
  • Year:
  • 2004

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Abstract

In this paper we present a performance analysis case study of two multilevel parallel benchmark codes implemented in three different programming paradigms applicable to shared memory computer architectures. We describe how detailed analysis techniques help to differentiate between the influences of the programming model itself and other factors, such as implementation specific behavior of the operating system or architectural issues.