PoS - Proceedings of Science
Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
Multigrid solver on Fugaku
K.I. Ishikawa, I. Kanamori* and H. Matsufuru
Full text: pdf
Pre-published on: May 16, 2022
Published on:
Abstract
We report an implementation of a multigrid solver for the Clover fermion
on supercomputer Fugaku,
which uses A64FX CPU with Arm architecture.
On Fugaku, a highly optimized implementation of BiCGStab solver with domain decomposed
preconditioner for the Clover fermion, called QCD Wide SIMD library (QWS),
is available.
We use the preconditioner in QWS as a smoother of the multigrid solver.
Our implementation shows reasonably good scaling and performance.
The code is developed by using Bridge++ code framework and its extension.
DOI: https://doi.org/10.22323/1.396.0278
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