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Traffic-oriented reconfigurable NoC with augmented inter-port buffer sharing

基于端口间缓冲区共享的流量感知可重构片上网络

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Abstract

As the number of cores in a multicore system increases, the communication pressure on the interconnection network also increases. The network-on-chip (NoC) architecture is expected to take on the ever-expanding communication demands triggered by the ever-increasing number of cores. The communication behavior of the NoC architecture exhibits significant spatial-temporal variation, posing a considerable challenge for NoC reconfiguration. In this paper, we propose a traffic-oriented reconfigurable NoC with augmented inter-port buffer sharing to adapt to the varying traffic flows with a high flexibility. First, a modified input port is introduced to support buffer sharing between adjacent ports. Specifically, the modified input port can be dynamically reconfigured to react to on-demand traffic. Second, it is ascertained that a centralized output-oriented buffer management works well with the reconfigurable input ports. Finally, this reconfiguration method can be implemented with a low overhead hardware design without imposing a great burden on the system implementation. The experimental results show that compared to other proposals, the proposed NoC architecture can greatly reduce the packet latency and improve the saturation throughput, without incurring significant area and power overhead.

摘要

随着多核系统中核数量的增加,片上互连网络的通信压力也随之增大。片上网络(NoC)的通信架构能够承载因核数量不断增加而引发的不断扩大的通信需求。NoC架构的通信行为表现出明显的时空变化,给多核互连系统的重新配置带来巨大挑战。本文提出一种面向流量的可重构NoC,其采用端口间缓冲区共享策略,可灵活适应不同的流量特征,具有很高灵活性。首先,修改输入端口以支持相邻端口之间的缓冲区共享。具体而言,修改后的输入端口可动态重新配置,以响应按需流量。其次,采用一种面向输出的集中式缓冲区管理机制,配合可重构的输入端口。最后,这种可重构方法可通过较低开销的硬件设计实现,不会给系统实现带来很大负担。实验结果表明,与其他方案相比,本文所提出的NoC架构大大降低了数据包延迟,提高了饱和吞吐量,而且不会产生显著的面积和功耗开销。

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Contributions

Chenglong SUN designed the research. Yiming OUYANG and Huaguo LIANG processed the data and drafted the paper. Chenglong SUN helped organize, revised, and finalized the paper.

Corresponding author

Correspondence to Yiming Ouyang  (欧阳一鸣).

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All the authors declare that they have no conflict of interest.

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Project supported by the National Natural Science Foundation of China (No. 62374049)

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Sun, C., Ouyang, Y. & Liang, H. Traffic-oriented reconfigurable NoC with augmented inter-port buffer sharing. Front Inform Technol Electron Eng 25, 1322–1336 (2024). https://doi.org/10.1631/FITEE.2300458

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  • DOI: https://doi.org/10.1631/FITEE.2300458

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