Ookami: An A64FX Computing Resource

• DOI: 10.48550/arxiv.2311.04259
• Publication Date: 2024-04-01
• Authors: Calder, A. C.; Siegmann, E.; Feldman, C.; Chheda, S.; Smolarski, D. C.; Swesty, F. D.; Curtis, A.; Dey, J.; Carlson, D.; Michalowicz, B.; Harrison, R. J.
• Keywords: High Energy Astrophysical Phenomena (astro-ph.HE); FOS: Computer and information sciences; Computer Science - Distributed, Parallel, and Cluster Computing; 0103 physical sciences; FOS: Physical sciences; Distributed, Parallel, and Cluster Computing (cs.DC); Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - High Energy Astrophysical Phenomena; 01 natural sciences; Instrumentation and Methods for Astrophysics (astro-ph.IM)

Abstract We present a look at Ookami, a project providing community access to a testbed supercomputer with the ARM-based A64FX processors developed by a collaboration between RIKEN and Fujitsu and deployed in the Japanese supercomputer Fugaku. We provide an overview of the project and details of the hardware, and describe the user base and education/training program. We present highlights from previous performance studies of two astrophysical simulation codes and present a strong scaling study of a full 3D supernova simulation as an example of the the machine’s capability.