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International Journal of Reconfigurable Computing
Volume 2018, Article ID 6784319, 14 pages
https://doi.org/10.1155/2018/6784319
Research Article

RP-Ring: A Heterogeneous Multi-FPGA Accelerator

University of Science and Technology of China, Hefei, China

Correspondence should be addressed to Xi Jin; nc.ude.ctsu@ixnij

Received 21 August 2017; Revised 5 November 2017; Accepted 17 January 2018; Published 4 April 2018

Academic Editor: Michael Hübner

Copyright © 2018 Shuaizhi Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To reduce the cost of designing new specialized FPGA boards as direct-summation MOND (Modified Newtonian Dynamics) simulator, we propose a new heterogeneous architecture with existing FPGA boards, which is called RP-ring (reconfigurable processor ring). This design can be expanded conveniently with any available FPGA board and only requires quite low communication bandwidth between FPGA boards. The communication protocol is simple and can be implemented with limited hardware/software resources. In order to avoid overall performance loss caused by the slowest board, we build a mathematical model to decompose workload among FPGAs. The dividing of workload is based on the logic resource, memory access bandwidth, and communication bandwidth of each FPGA chip. Our accelerator can achieve two orders of magnitude speedup compared with CPU implementation.