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A GPU-Accelerated Modern Fortran Version of the ECHO Code for Relativistic Magnetohydrodynamics by Del Zanna, Luca; Landi, Simone; Serafini, Lorenzo; Bugli, Matteo; Papini, Emanuele is a scholarly article available to read on EtoBox.

What is A GPU-Accelerated Modern Fortran Version of the ECHO Code for Relativistic Magnetohydrodynamics about?

The numerical study of relativistic magnetohydrodynamics (MHD) plays a crucial role in high-energy astrophysics, but unfortunately is computationally demanding, given the complex physics involved (high Lorentz factor flows, extreme magnetization, curved spacetimes near compact objects) and the large variety of spatial scales needed to resolve turbulent motions. A great benefit comes from the porting of existing codes running on standard processors to GPU-based platforms. However, this usually requires a drastic rewriting of the original code, the use of specific languages like CUDA, and a complex analysis of data management and optimization of parallel processes. Here we describe the porting of the ECHO code for special and general relativistic MHD to accelerated devices, simply based on native Fortran language built-in constructs, especially 'do concurrent' loops, few OpenACC directives, and the straightforward data management provided by the Unified Memory option of NVIDIA compilers.Thanks to these very minor modifications to the original code, the new version of ECHO runs at least 16 times faster on GPU platforms compared to CPU-based ones. The chosen benchmark is the 3D propaga

Author

Del Zanna, Luca; Landi, Simone; Serafini, Lorenzo; Bugli, Matteo; Papini, Emanuele

Published

2024

Language

EN