Asynchronous-many-task systems: Challenges and opportunities - Scaling an AMR astrophysics code on exascale machines using Kokkos and HPX

Gregor Daiß, Patrick Diehl, Jiakun Yan, John K. Holmen, Rahulkumar Gayatri, Christoph Junghans, Alexander Straub, Jeff R. Hammond, Dominic Marcello, Miwako Tsuji, Dirk Pflüger, Hartmut Kaiser, University of Stuttgart, Los Alamos National Laboratory, Los Alamos, Louisiana State University, Baton Rouge, University of Illinois Urbana-Champaign, Oak Ridge National Laboratory, Oak Ridge, Lawrence Berkeley National Laboratory, NVIDIA Helsinki Oy, RIKEN Center for Computational Science

The International Journal of High Performance Computing Applications

Published online on October 16, 2025

Abstract

The International Journal of High Performance Computing Applications, Volume 40, Issue 2, Page 196-216, March 2026.
Dynamic and adaptive mesh refinement is pivotal in high-resolution, multi-physics, multi-model simulations, necessitating precise physics resolution in localized areas across expansive domains. Today’s supercomputers’ extreme heterogeneity presents a ...