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Enhanced global congestion awareness (EGCA) for load balance in networks-on-chip

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Abstract

As the core count increases in a single chip, traditionally centralized communication architecture has not met the communication demand in new situations, such as system-on-chip (SoC) and chip multi-processor (CMP). Networks-on-chip (NoC), which emerges as an interconnection and communication fabric between components on a single chip, has been regarded as an effective solution. Routing algorithm plays a key role for the performance of NoCs and congestion awareness adaptive routing algorithms take more and more attentions as they have the better latency and throughput performance than the other routing algorithms. However, the existing congestion awareness adaptive routing algorithms often suffer from poor timeliness and accuracy of congestion information, which may lead to high latency and reduced throughput. To address these issues, we propose an enhanced global congestion awareness (EGCA) adaptive routing algorithm which is based on the global congestion awareness (GCA) adaptive technique. EGCA improves the distribution mechanism of congestion information of GCA, which leads to a better timeliness and accuracy of congestion information. Extensive simulations compared the proposed mechanism with typical local, region and global congestion awareness adaptive routing algorithms show that the proposed mechanism can improve system throughput by up to \(\sim \)14 and \(\sim \)8 % and reduces latency by up to \(\sim \)30 and \(\sim \)15 % compared with minimal adaptive routing and GCA, respectively.

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Acknowledgments

This paper is supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LY15F020040 and No.LY16F020028, the Doctoral Scientific Research Foundation of JiaXing University under Grant No. N70514009. Humanity and Social Science Youth foundation of Ministry of Education of China under Grant no. 15YJCZH088.

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  1. College of Mathematics Physics and Information Engineering, Jiaxing University, Jiaxing, 314000, China

    Jili Yan

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Yan, J. Enhanced global congestion awareness (EGCA) for load balance in networks-on-chip. J Supercomput 72, 567–587 (2016). https://doi.org/10.1007/s11227-015-1583-9

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