Near Memory Acceleration On High Resolution Radio Astronomy Imaging
2020 9TH MEDITERRANEAN CONFERENCE ON EMBEDDED COMPUTING (MECO)(2020)
摘要
Modern radio telescopes like the Square Kilometer Array (SKA) will need to process in real-time exabytes of radioastronomical signals to construct a high-resolution map of the sky. Near-Memory Computing (NMC) could alleviate the performance bottlenecks due to frequent memory accesses in a state-of-the-art radio-astronomy imaging algorithm. In this paper, we show that a sub-module performing a two-dimensional fast Fourier transform (2D FFT) is memory bound using CPI breakdown analysis on IBM Power9. Then, we present an NMC approach on FPGA for 2D FFT that outperforms a CPU by up to a factor of 120x and performs comparably to a high-end GPU, while using less bandwidth and memory.
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关键词
astronomy,imaging,memory,radio,resolution
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