A GPU Spatial Processing System for CHIME

N. Denman, A. Renard, K. Vanderlinde, P. Berger, K. Masui, I. Tretyakov
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引用次数: 4

Abstract

We present an overview of the Graphics Processing Unit (GPU) based spatial processing system created for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). The design employs AMD S9300x2 GPUs and readily-available commercial hardware in its processing nodes to provide a cost- and power-efficient processing substrate. These nodes are supported by a liquid-cooling system which allows continuous operation with modest power consumption and in all but the most adverse conditions. Capable of continuously correlating 2048 receiver-polarizations across 400\,MHz of bandwidth, the CHIME X-engine constitutes the most powerful radio correlator currently in existence. It receives $6.6$\,Tb/s of channelized data from CHIME's FPGA-based F-engine, and the primary correlation task requires $8.39\times10^{14}$ complex multiply-and-accumulate operations per second. The same system also provides formed-beam data products to commensal FRB and Pulsar experiments; it constitutes a general spatial-processing system of unprecedented scale and capability, with correspondingly great challenges in computation, data transport, heat dissipation, and interference shielding.
一种用于CHIME的GPU空间处理系统
我们提出了图形处理单元(GPU)为基础的空间处理系统创建了加拿大氢强度测绘实验(CHIME)的概述。该设计在其处理节点中采用AMD S9300x2 gpu和现成的商用硬件,以提供成本和功耗效率高的处理基板。这些节点由液体冷却系统支持,该系统允许在除最不利条件外的所有条件下以适度的功耗连续运行。CHIME x引擎能够在400mhz的带宽上连续关联2048个接收器偏振,是目前存在的最强大的无线电相关器。它从CHIME的基于fpga的f引擎接收6.6 Tb/s的信道化数据,主要的相关任务需要每秒8.39 × 10^{14}$复杂的乘法和累加运算。该系统还为共同的快速射电暴和脉冲星实验提供了成形波束数据产品;它构成了一个规模和能力空前的通用空间处理系统,相应地在计算、数据传输、散热和干扰屏蔽方面提出了巨大的挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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