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UMINF 10.05

Parallel and Cache-Efficient In-Place Matrix Storage Format Conversion

Techniques and algorithms for efficient in-place conversion to and from standard and blocked matrix storage formats are described. Such functionality is required by numerical libraries that use different data layouts internally. Parallel algorithms and a software package for in-place matrix storage format conversion based on in-place matrix transposition are presented and evaluated. A new algorithm for in-place transposition which efficiently determines the structure of the transposition permutation a priori is one of the key ingredients. It enables effective load balancing in a parallel environment.


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Fred Gustavson , Lars Karlsson and Bo Kågström

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Entry responsible: Lars Karlsson

Page Responsible: Frank Drewes