Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2010-11-11
PoS Lattice2010:037,2010
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 8 figures, talk presented at the XXVIII International Symposium on Lattice Field Theory, June 14-19 2010, Villasimius
Scientific paper
We present an adaptive multigrid Dirac solver developed for Wilson clover fermions which offers order-of-magnitude reductions in solution time compared to conventional Krylov solvers. The solver incorporates even-odd preconditioning and mixed precision to solve the Dirac equation to double precision accuracy and shows only a mild increase in time to solution for decreasing quark mass. We show actual time to solution on production lattices in comparison to conventional Krylov solvers and will also discuss the setup process and its relative cost to the total solution time.
Babich Ronald
Brannick James
Brower Richard C.
Clark Michael A.
Cohen Saul D.
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