Acceleration of Automated HI Source Extraction

Badenhorst, Scott J. and Blyth, Sarah and Kuttel, Michelle M. (2013) Acceleration of Automated HI Source Extraction, Proceedings of Astronomical Data Analysis Software and Systems XXII, ASP Conference Series, 5-8 November 2012, Champaign, IL, USA, 475, 53-59, Astronomical Society of the Pacific.

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We aim to enable fast automated extraction of neutral hydrogen (HI) sources from large survey data sets. This requires both handling the large files (>5 TB) to be produced by next-generation interferometers and acceleration of the source extraction algorithm. We develop an efficient multithreaded implementation of the A’Trous wavelet reconstruction algorithm, which we evaluate against the serial implementation in the DUCHAMP package. We also evaluate three memory management libraries (Mmap, Boost and Stxxl) that enable processing of data files too large to fit into main memory, to establish which provides the best performance.

Item Type: Conference paper
Subjects: Applied computing > Physical sciences and engineering
Date Deposited: 28 Oct 2013
Last Modified: 10 Oct 2019 15:32

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