A GPU-based correlator X-engine implemented on the CHIME Pathfinder

2015 IEEE 26th International Conference on Application-specific Systems, Architectures and Processors (ASAP) Pub Date : 2015-03-20 DOI:10.1109/ASAP.2015.7245702

N. Denman, M. Amiri, K. Bandura, L. Connor, M. Dobbs, M. Fandino, M. Halpern, A. Hincks, G. Hinshaw, C. Höfer, P. Klages, K. Masui, J. Parra, L. Newburgh, A. Recnik, J. Shaw, K. Sigurdson, Kendrick M. Smith, K. Vanderlinde

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引用次数: 18

Abstract

We present the design and implementation of a custom GPU-based compute cluster that provides the correlation X-engine of the CHIME Pathfinder radio telescope. It is among the largest such systems in operation, correlating 32,896 baselines (256 inputs) over 400MHz of radio bandwidth. Making heavy use of consumer-grade parts and a custom software stack, the system was developed at a small fraction of the cost of comparable installations. Unlike existing GPU backends, this system is built around OpenCL kernels running on consumer-level AMD GPUs, taking advantage of low-cost hardware and leveraging packed integer operations to double algorithmic efficiency. The system achieves the required 105 TOPS in a 10kW power envelope, making it one of the most power-efficient X-engines in use today.

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基于gpu的相关器x引擎在CHIME探路者上实现

本文提出了一种基于gpu的计算集群的设计和实现，该集群提供了CHIME探路者射电望远镜的相关x引擎。它是运行中最大的此类系统之一，在400MHz无线电带宽上关联32,896个基线(256个输入)。由于大量使用消费级部件和定制软件堆栈，该系统的开发成本仅为同类安装的一小部分。与现有的GPU后端不同，该系统是围绕OpenCL内核构建的，运行在消费级AMD GPU上，利用低成本硬件和利用打包整数运算来提高算法效率。该系统在10kW的功率范围内达到了所需的105 TOPS，使其成为当今使用的最节能的x发动机之一。

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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来源期刊

2015 IEEE 26th International Conference on Application-specific Systems, Architectures and Processors (ASAP)

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