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Axis Communication Method for Algebraic Multigrid Solver
Akihiro FUJII Osni MARQUES
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/11/01
Online ISSN: 1745-1361
Type of Manuscript: LETTER
Category: Computer System
strong scaling, liner solver, Algebraic multigrid method,
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Communication costs have become a performance bottleneck in many applications, and are a big issue for high performance computing on massively parallel machines. This paper proposes a halo exchange method for unstructured sparse matrix vector products within the algebraic multigrid method, and evaluate it on a supercomputer with mesh/torus networks. In our numerical tests with a Poisson problem, the proposed method accelerates the linear solver more than 14 times with 23040 cores.