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Paper: Acceleration of Automated HI Source Extraction
Volume: 475, Astronomical Data Analysis Software and Systems XXII
Page: 45
Authors: Badenhorst, S. J.; Blyth, S.; Kuttel, M. M.
Abstract: 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.
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