Minimizing associativity conflicts in Morton layout

Thiyagalingam, J., Beckmann, O. and Kelly, P.H.J. 2006. Minimizing associativity conflicts in Morton layout. in: Wyrzykowski, R., Dongarra, J., Meyer, N. and Wasniewski, J. (ed.) Parallel Processing and Applied Mathematics: 6th International Conference, PPAM 2005, Poznan, Poland, September 11-14, 2005, revised selected papers Berlin, Germany Springer.

Chapter titleMinimizing associativity conflicts in Morton layout
AuthorsThiyagalingam, J., Beckmann, O. and Kelly, P.H.J.
EditorsWyrzykowski, R., Dongarra, J., Meyer, N. and Wasniewski, J.
Abstract

Hierarchically-blocked non-linear storage layouts, such as the Morton ordering, have been shown to be a potentially attractive compromise between row-major and column-major for two-dimensional arrays. When combined with appropriate optimizations, Morton layout offers some spatial locality whether traversed row- or column-wise. However, for linear algebra routines with larger problem sizes, the layout shows diminishing returns. It is our hypothesis that associativity conflicts between Morton blocks cause this behavior and we show that carefully arranging the Morton blocks can minimize this effect. We explore one such arrangement and report our preliminary results.

Book titleParallel Processing and Applied Mathematics: 6th International Conference, PPAM 2005, Poznan, Poland, September 11-14, 2005, revised selected papers
Year2006
PublisherSpringer
Publication dates
Published2006
Place of publicationBerlin, Germany
SeriesLecture notes in computer science
ISBN3540341412
Digital Object Identifier (DOI)https://doi.org/10.1007/11752578_131
Journal citation(3911), pp. 1082-1088

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