Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2011-07-13
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
Accepted for publication (2011 July 12): Monthly Notices of the Royal Astronomical Society, 10 pages, 9 figures and 6 tables
Scientific paper
The identification, and subsequent discovery, of fast radio transients through blind-search surveys requires a large amount of processing power, in worst cases scaling as $\mathcal{O}(N^3)$. For this reason, survey data are generally processed offline, using high-performance computing architectures or hardware-based designs. In recent years, graphics processing units have been extensively used for numerical analysis and scientific simulations, especially after the introduction of new high-level application programming interfaces. Here we show how GPUs can be used for fast transient discovery in real-time. We present a solution to the problem of de-dispersion, providing performance comparisons with a typical computing machine and traditional pulsar processing software. We describe the architecture of a real-time, GPU-based transient search machine. In terms of performance, our GPU solution provides a speed-up factor of between 50 and 200, depending on the parameters of the search.
Adami Kristian Zarb
Dulwich Fred
Karastergiou Aris
Magro Alessio
Mort Benjamin
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