Performance Evaluation of a Multi-zone Application in Different OpenMP Approaches

Authors:
Haoqiang Jin;Barbara Chapman;Lei Huang
Affiliations:
NAS Division, NASA Ames Research Center, Moffett Field, CA 94035-1000;Department of Computer Science, University of Houston, Houston, TX 77004;Department of Computer Science, University of Houston, Houston, TX 77004
Venue:
IWOMP '07 Proceedings of the 3rd international workshop on OpenMP: A Practical Programming Model for the Multi-Core Era
Year:
2007

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Abstract

We describe a performance study of a multi-zone application benchmark implemented in several OpenMP approaches that exploit multi-level parallelism and deal with unbalanced workload. The multi-zone application was derived from the well-known NAS Parallel Benchmarks (NPB) suite that involves flow solvers on collections of loosely coupled discretization meshes. Parallel versions of this application have been developed using the Subteam concept and Workqueuing model as extensions to the current OpenMP. We examine the performance impact of these extensions to OpenMP on a large shared memory machine and compare with hybrid and nested OpenMP programming models.