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DOE OSTI · 2522110

Nek5000/RS performance on advanced GPU architectures

Min, Misun [Argonne National Laboratory (ANL), Argonne, IL (United States)]·Lan, Yu-Hsiang [University of Illinois at Urbana-Champaign, IL (United States)]·Fischer, Paul [Argonne National Laboratory (ANL), Argonne, IL (United States); University of Illinois at Urbana-Champaign, IL (United States)]·Rathnayake, Thilina [University of Illinois at Urbana-Champaign, IL (United States)]·Holmen, John [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000259342641)
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Abstract

The authors explore performance scalability of the open-source thermal-fluids code, NekRS, on the U.S. Department of Energy's leadership computers, Crusher, Frontier, Summit, Perlmutter, and Polaris. Particular attention is given to analyzing performance and time-to-solution at the strong-scale limit for a target efficiency of 80%, which is typical for production runs on the DOE's high-performance computing systems. Several examples of anomalous behavior are also discussed and analyzed.

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97 MATHEMATICS AND COMPUTINGNek5000/RSexascalerod-bundlesmall modular reactorstrong scaling

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BibTeXRIS

Min, Misun [Argonne National Laboratory (ANL), Argonne, IL (United States)], Lan, Yu-Hsiang [University of Illinois at Urbana-Champaign, IL (United States)], Fischer, Paul [Argonne National Laboratory (ANL), Argonne, IL (United States); University of Illinois at Urbana-Champaign, IL (United States)], Rathnayake, Thilina [University of Illinois at Urbana-Champaign, IL (United States)], Holmen, John [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000259342641). 2025-02-20. Nek5000/RS performance on advanced GPU architectures. https://doi.org/10.3389/fhpcp.2024.1303358

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