Experiences readying applications for Exascale

Conference · Wed Nov 01 00:00:00 EDT 2023

OSTI ID:2217710

Gottiparthi, Kalyan ^[1]; Roth, Philip ^[1]; Norman, Matthew ^[1]; Budiardja, Reuben ^[1]; Bauman, Paul T. ^[2]; Bykov, Dmytro ^[1]; Chen, Jacqueline H. ^[3]; Chalmers, Noel ^[2]; Curtis, Nicholas ^[2]; Day, Marc ^[4]; Eisenbach, Markus ^[1]; Esclapez, Lucas ^[4]; Fanfarillo, Alessandro ^[2]; Freitag, William ^[2]; Frontiere, Nicholas ^[5]; Georgiadou, Antigoni ^[1]; Glenski, Joseph ^[6]; Henry de frahan, Marc T. ^[4]; Jansen, Gustav ^[1]; Joubert, Wayne ^[1] ; Lietz, Justin ^[1]; Messer II, Bronson ^[1]; Kurzak, Jakub ^[2]; Malaya, Nicholas ^[2]; McDougall, Damon ^[2]; Mullowney, Paul ^[2]; Papatheodore, Thomas ^[1]; Nichols, Stephen ^[1]; Sreepathi, Sarat ^[1]; Rood, Jon ^[4]; White, James ^[6]; Wolfe, Noah ^[2]

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1. ORNL
2. Advanced Micro Devices (AMD)
3. Sandia National Laboratories (SNL)
4. National Renewable Energy Laboratory (NREL)
5. Argonne National Laboratory (ANL)
6. Hewlett Packard Enterprise

The advent of Exascale computing invites an assessment of existing best practices for developing application readiness on the world's largest supercomputers. This work details observations from the last four years in preparing scientific applications to run on the Oak Ridge Leadership Computing Facility's (OLCF) Frontier system. This paper addresses a range of topics in software including programmability, tuning, and portability considerations that are key to moving applications from existing systems to future installations. A set of representative workloads provides case studies for general system and software testing. We evaluate the use of early access systems for development across several generations of hardware. Finally, we discuss how best practices were identified and disseminated to the community through a wide range of activities including user-guides and trainings. We conclude with recommendations for ensuring application readiness on future leadership computing systems.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 2217710
• Country of Publication: United States
• Language: English