High-order Method for a New Generation of Large Eddy Simulation Solver
Creators
- 1. Centre Informatique National de l'Enseignement Supérieur, Montpellier, France
Contributors
Others:
- 1. Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique, Toulouse, France
Description
We enabled hybrid OpenMP/MPI computations for a new generation of CFD code based on a new high-order
method (Spectral Difference method) dedicated to Large Eddy Simulation (LES). The code is written in Fortran
90 with MPI library and OpenMP directives for the parallelization. This white-paper is focused on achieving
good performances with the OpenMP shared memory model on standard environment (bi-socket nodes and
multi-core x86 processors). The goal was to reduce the number of MPI communications by considering MPI
communications between nodes and OpenMP approach for all cores on any node. Three different approaches are
compared: full MPI, full OpenMP and hybrid OpenMP/MPI. We observed that hybrid and full MPI
computations took nearly the same time for a small number of cores.
Files
WP203.pdf
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