sponsored byIEEEACMThe International Conference for High Performance 
Computing, Networking, Storage and Analysis
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SCHEDULE: NOV 16-21, 2014

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Optimization and Highly Parallel Implementation of Domain Decomposition Based Algorithms

SESSION: Poster Reception

EVENT TYPE: Posters

TIME: 5:15PM - 7:00PM

AUTHOR(S):Lubomir Riha, Tomas Brzobohaty, Alexandros Markopoulos, Marta Jarosova, Tomas Kozubek

ROOM:New Orleans Theater Lobby

ABSTRACT:

We describe an implementation and scalability results of a hybrid FETI (Finite Element Tearing and Interconnecting) solver based on our variant of the FETI type domain decomposition method called Total FETI. In our approach a small
number of neighboring subdomains is aggregated into clusters, which results into a smaller coarse problem. Current implementation of the solver is focused on the optimal performance of the main CG solver, including: implementation of ommunication hiding and avoiding techniques for global communications; optimization of the nearest neighbor communication - multiplication with global gluing matrix; and optimization of the parallel CG algorithm to iterate over local Lagrange multipliers only. The performance is demonstrated on a linear elasticity synthetic 3D cube and real world benchmarks.

Chair/Author Details:

Lubomir Riha - IT4Innovations

Tomas Brzobohaty - IT4Innovations

Alexandros Markopoulos - IT4Innovations

Marta Jarosova - IT4Innovations

Tomas Kozubek - IT4Innovations

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