Experiences using OpenMP based on compiler directed software DSM on a PC cluster

Authors:
Matthias Hess;Gabriele Jost;Matthias Müller;Roland Rühle
Affiliations:
HLRS, Stuttgart, Germany;NASA Ames Research Center, Moffett Field, CA;HLRS, Stuttgart, Germany;HLRS, Stuttgart, Germany
Venue:
WOMPAT'03 Proceedings of the OpenMP applications and tools 2003 international conference on OpenMP shared memory parallel programming
Year:
2003

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Abstract

In this work we report on our experiences running OpenMP programs on a commodity cluster of PCs running a software distributed shared memory (DSM) system. We describe our test environment and report on the performance of a subset of the NAS Parallel Benchmarks that have been automatically parallelized for OpenMP. We compare the performance of the OpenMP implementations with that of their message passing counterparts and discuss performance differences.