Polyhedral Search Space Exploration in the ExaStencils Code Generator

  • Performance optimization of stencil codes requires data locality improvements. The polyhedron model for loop transformation is well suited for such optimizations with established techniques, such as the PLuTo algorithm and diamond tiling. However, in the domain of our project ExaStencils, stencil codes, it fails to yield optimal results. As an alternative, we propose a new, optimized, multi-dimensional polyhedral search space exploration and demonstrate its effectiveness: we obtain better results than existing approaches in several cases. We also propose how to specialize the search for the domain of stencil codes, which dramatically reduces the exploration effort without significantly impairing performance.

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Author:Stefan Kronawitter, Christian Lengauer
Parent Title (English):ACM Transactions on Architecture and Code Optimization
Document Type:Article
Year of Completion:2018
Date of Publication (online):2018/10/10
Date of first Publication:2018/10/10
Publishing Institution:Universität Passau
Release Date:2018/10/18
Tag:Discrete space search; Software performance; Source code generation
Gefördert durch den Publikationsfonds der Universitätsbibliothek Passau
Institutes:Fakultät für Informatik und Mathematik
Dewey Decimal Classification:0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 000 Informatik, Informationswissenschaft, allgemeine Werke
open_access (DINI-Set):open_access
Licence (German):License LogoStandardbedingung laut Einverständniserklärung