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Experiences at scale with PGAS versions of a Hydrodynamics application

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Mallinson, Andrew C., Jarvis, Stephen A., Gaudin, W. P. and Herdman, J. A. (2014) Experiences at scale with PGAS versions of a Hydrodynamics application. In: PGAS '14 : 8th International Conference on Partitioned Global Address Space Programming Models, Eugene, Oregon, USA, 7-10 Oct 2014. Published in: Proceedings of the 8th International Conference on Partitioned Global Address Space Programming Models pp. 1-11. ISBN 9781450332477. doi:10.1145/2676870.2676873

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Official URL: http://dx.doi.org/10.1145/2676870.2676873

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Abstract

In this work we directly evaluate two PGAS programming
models, CAF and OpenSHMEM, as candidate technologies
for improving the performance and scalability of scientific
applications on future exascale HPC platforms. PGAS approaches
are considered by many to represent a promising
research direction with the potential to solve some of the existing
problems preventing codebases from scaling to exascale
levels of performance. The aim of this work is to better
inform the exacsale planning at large HPC centres such as
AWE. Such organisations invest significant resources maintaining
and updating existing scientific codebases, many of
which were not designed to run at the scales required to
reach exascale levels of computational performance on future
system architectures. We document our approach for implementing
a recently developed Lagrangian-Eulerian explicit
hydrodynamics mini-application in each of these PGAS languages.
Furthermore, we also present our results and experiences
from scaling these different approaches to high node
counts on two state-of-the-art, large scale system architectures
from Cray (XC30) and SGI (ICE-X), and compare
their utility against an equivalent existing MPI implementation.

Item Type: Conference Item (Paper)
Subjects: Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
Divisions: Faculty of Science > Computer Science
Library of Congress Subject Headings (LCSH): High performance computing, Hydrodynamics
Journal or Publication Title: Proceedings of the 8th International Conference on Partitioned Global Address Space Programming Models
Publisher: ACM
ISBN: 9781450332477
Book Title: Proceedings of the 8th International Conference on Partitioned Global Address Space Programming Models - PGAS '14
Official Date: 2014
Dates:
DateEvent
2014UNSPECIFIED
Page Range: pp. 1-11
DOI: 10.1145/2676870.2676873
Status: Peer Reviewed
Publication Status: Published
Funder: Atomic Weapons Establishment (Great Britain) (AWE), Royal Society (Great Britain), Engineering and Physical Sciences Research Council (EPSRC)
Grant number: CDK0660 (AWE), CDK0724 (AWE), IF090020/AM (RS)
Embodied As: 1
Conference Paper Type: Paper
Title of Event: PGAS '14 : 8th International Conference on Partitioned Global Address Space Programming Models
Type of Event: Conference
Location of Event: Eugene, Oregon, USA
Date(s) of Event: 7-10 Oct 2014

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