sponsored byACMIEEE The International Conference for High Performance 
Computing, Networking, Storage and Analysis
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SCHEDULE: NOV 15-20, 2015

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Integrated Co-Design of Future Exascale Software

SESSION: Regular & ACM Student Research Competition Poster Reception

EVENT TYPE: Posters, Receptions, ACM Student Research Competition

EVENT TAG(S): HPC Beginner Friendly, Regular Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR(S): Michela Becchi, Manish Parashar, Dorian C. Arnold

AUTHOR(S):Bjoern Gmeiner, Markus Huber, Lorenz John, Ulrich Ruede, Christian Waluga, Barbara Wohlmuth, Holger Stengel, Martin Bauer

ROOM:Level 4 - Lobby

ABSTRACT:

The co-design of algorithms for the numerical approximation of partial differential equations is essential to exploit future exascale systems. Here, we focus on key attributes such as node performance, ultra scalable multigrid methods, scheduling techniques for uncertain data, and fault tolerant iterative solvers. In the case of a hard fault, we combine domain partitioning with highly scalable geometric multigrid schemes to obtain fast fault-robust solvers. The recovery strategy is based on a hierarchical hybrid concept where the values on lower dimensional primitives such as faces are stored redundantly and thus can be recovered easily. The lost volume unknowns are re-computed approximately by solving a local Dirichlet problem on the faulty subdomain. Different strategies are compared and evaluated with respect to performance, computational cost, and speed up. Locally accelerated strategies resulting in asynchronous multigrid iterations can fully compensate faults.

Chair/Author Details:

Michela Becchi, Manish Parashar, Dorian C. Arnold (Chair) - University of Missouri|Rutgers University|University of New Mexico|

Bjoern Gmeiner - University Erlangen-Nuremberg

Markus Huber - Technical University of Munich

Lorenz John - Technical University of Munich

Ulrich Ruede - University Erlangen-Nuremberg

Christian Waluga - Technical University of Munich

Barbara Wohlmuth - Technical University of Munich

Holger Stengel - University Erlangen-Nuremberg

Martin Bauer - University Erlangen-Nuremberg

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