Nek5000/RS performance on advanced GPU architectures

Year: 2025

Type: article

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.

Source: Frontiers in High Performance Computing

DOI: 10.3389/fhpcp.2024.1303358

Authors: Misun Min, Yu-Hsiang Lan, Paul Fischer, Thilina Rathnayake, John Holmen

Institutions: Argonne National Laboratory, University of Illinois Urbana-Champaign, Oak Ridge Leadership Computing Facility

Language: English

Topic: Parallel Computing and Optimization Techniques

Subfield: Hardware and Architecture

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,353

Funders: U.S. Department of Energy, National Energy Research Scientific Computing Center, Office of Science, Argonne National Laboratory, Oak Ridge National Laboratory

OpenAlex ID: W4407828860