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SUMMARY:Neko: A Modern\, Portable\, and Scalable Framework for Extreme-Scale Computational Fluid Dynamics
DESCRIPTION:Join our own Niclas Jansson at the SIAM Conference on Computational Science and Engineering (CSE25) in Fort Worth\, Texas\, for his  talk “Neko: A Modern\, Portable\, and Scalable Framework for Extreme-Scale Computational Fluid Dynamics” in the mini-symposium MS19: Performance Benchmarking of Scientific Libraries and Applications. \nRecent trends and advancements in utilizing more diverse and heterogeneous hardware in High-Performance Computing (HPC) are challenging scientific software developers in their pursuit of efficient numerical methods with sustained performance across a diverse set of platforms. As a result\, researchers are bing forced to refactor their codes to leverage these powerful new heterogeneous systems. We present our work on addressing the extreme-scale computing challenges in computational fluid dynamics\, ensuring exascale readiness of turbulence simulations. Focusing on Neko\, a high-fidelity spectral element code\, we outline the optimisation and algorithmic work necessary to ensure scalability and performance portability across a wide range of platforms. Finally\, we present performance measurements on a wide range of accelerated computing platforms\, including the EuroHPC pre-exascale systems LUMI and Leonardo\, where Neko achieves excellent parallel efficiency for an extreme-scale direct numerical simulation (DNS) of turbulent thermal convection using up to 80% of the entire LUMI supercomputer.
URL:https://ceec-coe.eu/event/neko-a-modern-portable-and-scalable-framework-for-extreme-scale-computational-fluid-dynamics-2/
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