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A comparison of shared virtual memory and message passing programming techniques based on a finite element application

  • Rudolf Berrendorf
  • Michael Gerndt
  • Zakaria Lahjomri
  • Thierry Priol
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 854)

Abstract

This paper describes the methods used and experiences made with implementing a finite element application on three different parallel computers with either message passing or shared virtual memory as the programming model. Designing a parallel finite element application using message-passing requires to find a data domain decomposition to map data into the local memory of the processors. Since data accesses may be very irregular, communication patterns are unknown prior to the parallel execution and thus makes the parallelization a difficult task. We argue that the use of a shared virtual memory greatly simplifies the parallelization step. It is shown experimentally on an hypercube iPSC/2 that the use of the KOAN/Fortran-S programming environment based on a shared virtual memory allows to port quickly and easily a sequential application without a significant degradation in performance compared to the message passing version. Results for recent parallel architectures such as the Paragon XP/S for message-passing and the KSR1 for shared virtual memory are presented, too.

Keywords

shared virtual memory message passing programming model finite element application 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Rudolf Berrendorf
    • 1
  • Michael Gerndt
    • 1
  • Zakaria Lahjomri
    • 2
  • Thierry Priol
    • 2
  1. 1.Zentralinstitut für Angewandte MathematikForschungszentrum Jülich (KFA)JülichGermany
  2. 2.Campus de BeaulieuIRISA-INRIARennes CedexFrance

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