SACRA-K: A Performance-Portable Numerical Relativity Code with Kokkos

arXiv:2607.08743 · astro-ph.HE, astro-ph.IM, gr-qc · Submitted 2026-07-09 · Read on arXiv

Ming-Zhe Han, Kenta Kiuchi, Masaru Shibata

astro-ph.HE, astro-ph.IM, gr-qc

Submitted: 2026-07-09

Comments: 15 pages, 8 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Core — 15× in this paper · explained in 2 episodes
• Consistency — 8× in this paper · explained in 3 episodes
• Initial Data — 6× in this paper · explained in 2 episodes
• Accuracy — 4× in this paper · explained in 1 episode
• Abstraction — 2× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Calibration — 1× in this paper · explained in 7 episodes
• Communication Overhead — 1× in this paper · explained in 2 episodes
• Magnetohydrodynamics (MHD) — 1× in this paper · explained in 3 episodes
• Symmetry Breaking — 1× in this paper · explained in 3 episodes
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Phoebus: Performance Portable GRRMHD for Relativistic Astrophysics
• Taking GPU Programming Models to Task for Performance Portability
• A Horizon Study for Cosmic Explorer: Science, Observatories, and Community
• Snowmass2021 Cosmic Frontier White Paper: Numerical relativity for next-generation gravitational-wave probes of fundamental physics
• Subsolar-mass binary mergers of strange stars and neutron stars: gravitational waves and ejecta
• Parthenon -- a performance portable block-structured adaptive mesh refinement framework
• A magnetar formation in binary neutron star merger
• The error budget of binary neutron star merger simulations for configurations with high spin
• A Metric for Performance Portability
• AMReX: Block-Structured Adaptive Mesh Refinement for Multiphysics Applications

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