Improving the parallel performance of overlapping schwarz methods by using a smaller energy minimizing coarse space

Book chapter (2018)

Authors

A. Heinlein University of Cologne
Axel Klawonn University of Cologne
Oliver Rheinbach University of Technology Bergakademie Freiberg
Olof B. Widlund Courant Institute of Mathematical Sciences
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Published Date

2018

Language

English

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Abstract

We consider a recent overlapping Schwarz method with an energy-minimizing coarse space of reduced size. In numerical experiments for up to 64,000 cores, we show that the parallel efficiency and the total time to solution is improved significantly, compared to our previous overlapping Schwarz method using an alternative energy-minimizing coarse space.