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Full Record Details
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
IN Kozin (STFC Daresbury Lab.)
,
MJ Deegan (STFC Daresbury Lab.)
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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Licence Information:
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
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