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Improved Acceleration of the GPU Fourier Domain Acceleration Search Algorithm

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arxiv 1711.10855 v1 pith:VV4IRJXE submitted 2017-11-29 astro-ph.IM

Karel Adámek , Sofia Dimoudi , Mike Giles , Wesley Armour This is my paper · ORCID
classification astro-ph.IM
keywords implementationaccelerationcodefdasalgorithmarmourconvolutiondimoudi
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We present an improvement of our implementation of the Correlation Technique for the Fourier Domain Acceleration Search (FDAS) algorithm on Graphics Processor Units (GPUs) (Dimoudi & Armour 2015; Dimoudi et al. 2017). Our new improved convolution code which uses our custom GPU FFT code is between 2.5 and 3.9 times faster the than our cuFFT-based implementation (on an NVIDIA P100) and allows for a wider range of filter sizes then our previous version. By using this new version of our convolution code in FDAS we have achieved 44% performance increase over our previous best implementation. It is also approximately 8 times faster than the existing PRESTO GPU implementation of FDAS (Luo 2013). This work is part of the AstroAccelerate project (Armour et al. 2002), a many-core accelerated time-domain signal processing library for radio astronomy.

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