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UID:submissions.supercomputing.org_SC23_sess455_ws_risc102@linklings.com
SUMMARY:Evaluating HPX and Kokkos on RISC-V Using an Astrophysics Applicat
 ion Octo-Tiger
DESCRIPTION:Patrick Diehl, Gregor Daiss, Steven Brandt, Alireza Kheirkhaha
 n, and Hartmut Kaiser (Louisiana State University) and Christopher Taylor 
 and John Leidel (Tactical Computing Laboratories)\n\nIn recent years, comp
 uters based on the RISC-V architecture have raised broad interest in the h
 igh-performance computing (HPC) community. As the RISC-V community develop
 s the core instruction set architecture (ISA) along with ISA extensions, t
 he HPC community has been actively ensuring HPC applications and environme
 nts are supported. In this context, assessing the performance of asynchron
 ous many-task runtime systems (AMT) is important. We describe our experien
 ce with porting of a full 3D adaptive mesh-refinement, multi-scale, multi-
 model, and multi-physics application, Octo-Tiger, that is based on the HPX
  AMT, and we explore its performance characteristics on different RISC-V s
 ystems. The demonstrated results confirm that Octo-Tiger shows good scalin
 g behavior on all tested systems. We, however, expect that exceptional har
 dware support based on dedicated ISA extensions (such as single-cycle cont
 ext switches, extended atomic operations, and direct support for HPX's glo
 bal address space) would allow for even better performance results.\n\nTag
 : Architecture and Networks, Hardware Technologies\n\nRegistration Categor
 y: Workshop Reg Pass\n\nSession Chairs: Nick Brown (Edinburgh Parallel Com
 puting Centre (EPCC); University of Edinburgh, Scotland); John Davis (Open
 chip); Andy Gothard (Siemens); John Leidel (Tactical Computing Laboratorie
 s LLC, Texas Tech University); and Michael Wong (Codeplay Software Ltd, Kh
 ronos Group Inc)\n\n
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