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Idomura, Yasuhiro
no journal, ,
We discuss Exa-scale computing techniques for the gyrokinetic toroidal 5D full-f Eulerian code GT5D, which have been developed under the Post-K project. Towards burning plasma simulations in ITER, we have extended physics models including kinetic electrons and multi-species ions. To compute the burning plasma model at the ITER scale, we need Exa-scale computing. To this end, techniques for utilizing many core processors with low power consumption and avoiding communication bottlenecks, which are revealed by accelerated computation. In this talk, we explain many core optimization techniques, communication overlap techniques, and communication-avoiding algorithms, which have been developed to resolve the above issues, and show their performance evaluations on the latest many core platforms such as the Plasma Simulator.
Idomura, Yasuhiro
no journal, ,
We discuss Exa-scale computing techniques, which are developed under the Post-K project. Since fusion plasma simulations require first principles based computation of a convection-diffusion simulation in five dimensional phase space, Exa-scale computation is needed for analyzing the next generation experimental reactor ITER. To this end, techniques for utilizing many core processors with low power consumption and avoiding communication bottlenecks, which are revealed by accelerated computation. In this talk, we explain many core optimization techniques, communication-computation overlap techniques, and communication-avoiding algorithms, which have been developed to resolve the above issues, and show their performance evaluations on the latest many core platforms.
Idomura, Yasuhiro
no journal, ,
In this overview talk, first, we review computational nuclear engineering research activities at JAEA, which cover a wide spectrum of computing needs including various CFD codes on thermal hydraulics and environmental dynamics, radiation transport codes, quantum simulations on material science, and the latest machine learning applications. Second, we talk about the development of exascale nuclear CFD simulations on state-of-the-art accelerated computing platforms. Third, we present exascale plasma codes and new data science approaches developed under the post-K project. Finally, we discuss the state of the CEA-JAEA collaboration on computational nuclear engineering.