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BEGIN:VEVENT
DTSTAMP:20220812T074335Z
LOCATION:Darwin Room
DTSTART;TZID=Europe/Stockholm:20220628T163000
DTEND;TZID=Europe/Stockholm:20220628T170000
UID:submissions.pasc-conference.org_PASC22_sess151_msa234@linklings.com
SUMMARY:XGC's Cross-Architectural Journey: Gyrokinetic Plasma Physics on S
 ummit, Perlmutter, and Frontier
DESCRIPTION:Minisymposium\n\nXGC's Cross-Architectural Journey: Gyrokineti
 c Plasma Physics on Summit, Perlmutter, and Frontier\n\nScheinberg, Huck, 
 Ethier, Kulkarni, Ku...\n\nXGC is a particle-in-cell fusion plasma physics
  model. In preparation for high performance science production on the upco
 ming exascale systems Frontier and Aurora, XGC has undergone a major trans
 formation, including conversion from Fortran to C++ and adoption of the po
 rtability framework Kokkos. Using recently available testbeds similar to t
 he future full-scale machines, we have been able to test our strategies an
 d identify the challenges involved in maintaining good performance across 
 Nvidia, AMD, and Intel GPUs, as well as manycore architectures. High test 
 coverage and well-encapsulated code were key for starting on new systems. 
 Flexible data layout and communication algorithms can enable performance m
 ore finely tuned to the strengths of individual architectures.\n\nDomain: 
 Computer Science and Applied Mathematics, Physics
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