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Employing nested OpenMP for the parallelization of multi-zone computational fluid dynamics applications
Ayguadé Parra, Eduard; González Tallada, Marc; Martorell Bofill, Xavier; Jost, G
Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. CAP - Grup de Computació d´Altes Prestacions
In this paper we describe the parallelization of the multi-zone code versions of the NAS Parallel Benchmarks employing multi-level OpenMP parallelism. For our study, we use the NanosCompiler that supports nesting of OpenMP directives and provides clauses to control the grouping of threads, load balancing, and synchronization. We report the benchmark results, compare the timings with those of different hybrid parallelization paradigms (MPI+OpenMP and MLP) and discuss OpenMP implementation issues that affect the performance of multi-level parallel applications.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica
Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors::Arquitectures paral·leles
OpenMP
Parallel programming (Computer science)
OpenMP
Parallel programming models
Nested parallelism
NAS benchmarks
OpenMP
Programació en paral·lel (Informàtica)
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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