Octo-Tiger's New Hydro Module and Performance Using HPX+CUDA on ORNL's Summit

Patrick Diehl; Gregor Daiß; Dominic Marcello; Kevin Huck; Sagiv Shiber; Hartmut Kaiser; Juhan Frank; Dirk Pflüger

doi:10.1109/Cluster48925.2021.00059

Octo-Tiger's New Hydro Module and Performance Using HPX+CUDA on ORNL's Summit

Distributed, Parallel, and Cluster Computing 2021-10-22 v2 Instrumentation and Methods for Astrophysics

Authors: Patrick Diehl , Gregor Daiß , Dominic Marcello , Kevin Huck , Sagiv Shiber , Hartmut Kaiser , Juhan Frank , Dirk Pflüger

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Abstract

Octo-Tiger is a code for modeling three-dimensional self-gravitating astrophysical fluids. It was particularly designed for the study of dynamical mass transfer between interacting binary stars. Octo-Tiger is parallelized for distributed systems using the asynchronous many-task runtime system, the C++ standard library for parallelism and concurrency (HPX) and utilizes CUDA for its gravity solver. Recently, we have remodeled Octo-Tiger's hydro solver to use a three-dimensional reconstruction scheme. In addition, we have ported the hydro solver to GPU using CUDA kernels. We present scaling results for the new hydro kernels on ORNL's Summit machine using a Sedov-Taylor blast wave problem. We also compare Octo-Tiger's new hydro scheme with its old hydro scheme, using a rotating star as a test problem.

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@article{arxiv.2107.10987,
  title  = {Octo-Tiger's New Hydro Module and Performance Using HPX+CUDA on ORNL's Summit},
  author = {Patrick Diehl and Gregor Daiß and Dominic Marcello and Kevin Huck and Sagiv Shiber and Hartmut Kaiser and Juhan Frank and Dirk Pflüger},
  journal= {arXiv preprint arXiv:2107.10987},
  year   = {2021}
}

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Accepted to IEEE Cluster

Octo-Tiger's New Hydro Module and Performance Using HPX+CUDA on ORNL's Summit

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