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DOI 10.5286/dltr.2007005
Persistent URL http://purl.org/net/epubs/work/41816
Record Status Checked
Record Id 41816
Title A study of the performance of LAPACK symmetric matrix diagonalisers on multi-core architectures
Contributors
Abstract The threaded performance of real symmetric dense matrix diagonalisers has been thoroughly investigated. Two problems have been identified as preventing efficient performance and good scaling. First, the library must be fully threaded as opposed to a partially threaded library. Second, there is a more fundamental, algorithmic problem which results in memory bandwidth bottleneck during the reduction of a matrix to tri-diagonal form. The tri-diagonalisation step starts dominating from certain matrix sizes and as a result using multi-cores in this situation becomes inefficient. Thus diagonalisation algorithms more suitable for multi-cores are required.
Organisation CCLRC , CSE
Keywords
Funding Information
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report DL Technical Reports DL-TR-2007-005. 2007. DLTR-2007-005.pdf 2007