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DTSTAMP:20220812T074358Z
LOCATION:Montreal Room
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UID:submissions.pasc-conference.org_PASC22_sess179_pap116@linklings.com
SUMMARY:Porting Uintah to Heterogeneous Systems
DESCRIPTION:Paper\n\nPorting Uintah to Heterogeneous Systems\n\nHolmen, Be
 rzins, Sahasrabudhe\n\nThe Uintah Computational Framework is being prepare
 d to make portable use of forthcoming exascale systems, initially the DOE 
 Aurora system through the Aurora Early Science Program. This paper describ
 es the evolution of Uintah to be ready for such architectures. A key part 
 of this preparation has been the adoption of the Kokkos performance portab
 ility layer in Uintah. The sheer size of the Uintah codebase has made it i
 mperative to have a representative benchmark. The design of this benchmark
  and the use of Kokkos within it is discussed. This paper extends recent w
 ork with new scaling studies run 24x further than earlier studies. Results
  are shown for two benchmarks executing workloads representative of typica
 l Uintah applications. These results demonstrate single-source portability
  across the DOE Summit and NSF Frontera systems with good strong-scaling c
 haracteristics. The challenge of extending this approach to anticipated ex
 ascale systems is also considered.\n\nDomain: Engineering
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