Ready for the Frontier: Preparing Applications for the World's First Exascale System

Frontier, a supercomputer at the Oak Ridge Leadership Computing Facility (OLCF), debuted atop the Top500 list of the world's most powerful supercomputers in June 2022 as the very first computer to produce exascale performance. Making sure scientific applications are optimized on this architecture is the critical link necessary to translate the newly available computational power into scientific insight and solutions. To that goal, the OLCF developed the Center for Accelerated Application Readiness (CAAR) program to ensure that a suite of highly optimized applications are ready for scientific runs at the onset of production operations for Frontier. This paper describes our experience in porting and optimizing such suite of applications in the OLCF's CAAR program.

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Contributors:

• Reuben Budiardja
• Markus Eisenbach
• Gustav Jansen
• Stephen Nichols
• Mark Berril
• Arnold Tharrington
• David Rogers
• Bronson Messer