SC13 Home > SC13 Schedule > SC13 Presentation - A Scalable, Efficient Scheme for Evaluation of Stencil Computations over Unstructured Meshes

SCHEDULE: NOV 16-22, 2013

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A Scalable, Efficient Scheme for Evaluation of Stencil Computations over Unstructured Meshes

SESSION: Preconditioners and Unstructured Meshes

EVENT TYPE: Papers

TIME: 1:30PM - 2:00PM

SESSION CHAIR: George Biros

AUTHOR(S):James King, Mike Kirby

ROOM:401/402/403

ABSTRACT:
Stencil computations are a common class of operations that appear in many computational scientific and engineering applications. Stencil computations often benefit from compile-time analysis, exploiting data-locality, and parallelism. Post-processing of discontinuous Galerkin (dG) simulation solutions with B-spline kernels is an example of a numerical method which requires evaluating computationally intensive stencil operations over a mesh. Previous work on stencil computations has focused on structured meshes, while giving little attention to unstructured meshes. Performing stencil operations over an unstructured mesh requires sampling of heterogeneous elements which often leads to inefficient memory access patterns and limits data locality/reuse. In this paper, we present an efficient method for performing stencil computations over unstructured meshes which increases data-locality and cache efficiency, and a scalable approach for stencil tiling and concurrent execution. We provide experimental results in the context of post-processing of dG solutions that demonstrate the effectiveness of our approach.

Chair/Author Details:

George Biros (Chair) - University of Texas at Austin

James King - University of Utah

Mike Kirby - University of Utah

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The full paper can be found in the ACM Digital Library