Volume 430 -
The 39th International Symposium on Lattice Field Theory (LATTICE2022) -
Software development and Machines
Optimizing Staggered Multigrid for Exascale performance
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Pre-published on:
January 30, 2023
Published on:
April 06, 2023
Abstract
Adaptive multi-grid methods have proven very successful in dealing with critical slow down for the Wilson-Dirac solver in lattice gauge theory. Multi-grid algorithms developed for Staggered fermions using the K\"ahler-Dirac preconditioning (Brower et al 2018) have shown remarkable success. In this work, we discuss the performance of this staggered multi-grid algorithm in four dimensions. We also demonstrate that offloading some components of a multi-shift solve to a multi-grid solver leads to a significant performance improvement in an existing MILC spectrum workflow on the Summit and Selene supercomputers.
DOI: https://doi.org/10.22323/1.430.0335
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.