论文标题
GPU的铃声系统
A GPU Spatial Processing System for CHIME
论文作者
论文摘要
我们介绍了为加拿大氢强度映射实验（Chime）创建的基于图形处理单元（GPU）的空间处理系统的概述。该设计采用AMD S9300X2 GPU，并在其处理节点中使用易于使用的商业硬件，以提供成本和功率高效的处理基板。这些节点由液体冷却系统支持，该系统允许以适度的功耗以及除最不利条件以外的所有节点进行连续操作。能够连续将400 \带宽MHz的2048接收器偏置相关联，Chime X-Engine构成了当前存在的最强大的无线电相关器。它从基于FPGA的F-Engine收到$ 6.6 $ \，TB/s的通道数据，而主要的相关任务需要$ 8.39 \ times10^{14} $复杂的复杂乘数和算法每秒。同一系统还为Comensal FRB和PULSAR实验提供了形成的梁数据产品。它构成了前所未有的规模和能力的一般空间处理系统，在计算，数据传输，散热和干扰屏蔽方面面临着相应的挑战。
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.
