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ORIGINAL RESEARCH article

Front. High Perform. Comput.
Sec. Architecture and Systems
Volume 2 - 2024 | doi: 10.3389/fhpcp.2024.1303358
This article is part of the Research Topic Scientific Workflows at Extreme Scales View all 7 articles

Nek5000/RS Performance on Advanced GPU Architectures

Provisionally accepted
Misun Min Misun Min 1*Yu-Hsiang Lan Yu-Hsiang Lan 2Paul Fischer Paul Fischer 2Thilina Rathnayake Thilina Rathnayake 2John Holmen John Holmen 3
  • 1 Argonne National Laboratory (DOE), Lemont, United States
  • 2 University of Illinois at Urbana-Champaign, Champaign, Illinois, United States
  • 3 Oak Ridge Leadership Computing Facility (OLCF), Oak Ridge, Tennessee, United States

The final, formatted version of the article will be published soon.

    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.

    Keywords: Nek5000/RS, exascale, Strong scaling, Small Modular Reactor, Rod-bundle

    Received: 27 Sep 2023; Accepted: 19 Nov 2024.

    Copyright: © 2024 Min, Lan, Fischer, Rathnayake and Holmen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Misun Min, Argonne National Laboratory (DOE), Lemont, United States

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.