Hybrid MPI/OpenMP Parallelization in FETI-DP Methods

  • Axel Klawonn
  • Martin Lanser
  • Oliver Rheinbach
  • Holger Stengel
  • Gerhard Wellein
Part of the Lecture Notes in Computational Science and Engineering book series (LNCSE, volume 105)

Abstract

We present an approach to hybrid MPI/OpenMP parallelization in FETI-DP methods using OpenMP with PETSc+MPI in the finite element assembly and using the shared memory parallel direct solver Pardiso in the FETI-DP solution phase. Our approach thus uses OpenMP parallelization on subdomains and MPI in between subdomains. We investigate the efficiency of this approach for a benchmark problem from two dimensional nonlinear hyperelasticity. We observe good scalability for up to four threads for each MPI rank on a state-of-the-art Ivy Bridge architecture and incremental improvements for up to ten OpenMP threads for each MPI rank.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Axel Klawonn
    • 1
  • Martin Lanser
    • 1
  • Oliver Rheinbach
    • 2
  • Holger Stengel
    • 3
  • Gerhard Wellein
    • 3
  1. 1.Mathematisches InstitutUniversität zu KölnKölnGermany
  2. 2.Fakultät für Mathematik und Informatik, Institut für Numerische Mathematik und OptimierungTechnische Universität Bergakademie FreibergFreibergGermany
  3. 3.Erlangen Regional Computing CenterUniversity of Erlangen–NurembergErlangenGermany

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