MRHS multigrid solver for Wilson-clover fermions

Autor:	Richtmann, Daniel, Meyer, Nils, Wettig, Tilo
Rok vydání:	2022
Předmět:	High Energy Physics - Lattice Computer Science - Distributed Parallel and Cluster Computing
Druh dokumentu:	Working Paper
Popis:	We describe our implementation of a multigrid solver for Wilson-clover fermions, which increases parallelism by solving for multiple right-hand sides (MRHS) simultaneously. The solver is based on Grid and thus runs on all computing architectures supported by the Grid framework. We present detailed benchmarks of the relevant kernels, such as hopping and clover term on the various multigrid levels, intergrid operators, and reductions. The benchmarks were performed on the JUWELS Booster system at J\"ulich Supercomputing Centre, which is based on Nvidia A100 GPUs. For example, solving a $24^3\times128$ lattice on 16 GPUs, the overall speedup obtained solely from MRHS is about 10x. Comment: 8 pages, 14 figures, proceedings of Lattice 2022
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2211.13719 Zobrazit plný text záznamu View this record from Arxiv