Towards Exascale Computing for Astrophysical Simulation Leveraging the Leonardo EuroHPC System
Authors
Nitin Shukla
Alessandro Romeo
Caterina Caravita
Michael Redenti
Radim Vavrik
Lubomir Riha
Andrea Mignone
Marco Rossazza
Stefano Truzzi
Luca Tornatore
Antonio Ragagnin
Tiago Castro
Geray S. Karademir
Klaus Dolag
Pranab J. Deka
Fabio Bacchini
Rostislav-Paul Wilhelm
Daniele Gregori
Elisabetta Boella
Abstract
Developing and redesigning astrophysical, cosmological, and space plasma numerical codes for existing and next-generation accelerators is critical for enabling large-scale simulations. To address these challenges, the SPACE Center of Excellence (SPACE-CoE) fosters collaboration between scientists, code developers, and high-performance computing experts to optimize applications for the exascale era. This paper presents our strategy and initial results on the Leonardo system at CINECA for three flagship codes, namely gPLUTO, OpenGadget3 and iPIC3D, using profiling tools to analyze performance on single and multiple nodes. Preliminary tests show all three codes scale efficiently, reaching 80% scalability up to 1,024 GPUs.
