Effective automatic parallelization of stencil computations

Author:

Krishnamoorthy Sriram1,Baskaran Muthu1,Bondhugula Uday1,Ramanujam J.2,Rountev Atanas1,Sadayappan P1

Affiliation:

1. The Ohio State University, Columbus, OH

2. Lousiana State University, Baton Rouge, LA

Abstract

Performance optimization of stencil computations has been widely studied in the literature, since they occur in many computationally intensive scientific and engineering applications. Compiler frameworks have also been developed that can transform sequential stencil codes for optimization of data locality and parallelism. However, loop skewing is typically required in order to tile stencil codes along the time dimension, resulting in load imbalance in pipelined parallel execution of the tiles. In this paper, we develop an approach for automatic parallelization of stencil codes, that explicitly addresses the issue of load-balanced execution of tiles. Experimental results are provided that demonstrate the effectiveness of the approach.

Publisher

Association for Computing Machinery (ACM)

Subject

Computer Graphics and Computer-Aided Design,Software

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