Abstract
Multiple applications of different criticality are increasingly being executed on the same System-on-Chip (SoC) platform to reduce resource consumption. Communication resources like the Network-on-Chip (NoC) on such platforms can be shared by such applications. Performance can be improved if the NoC is able to adapt at runtime to the requirements of different applications. An important challenge here is guaranteeing Quality of Service (QoS) for critical applications while improving overall performance of critical and non-critical applications. In this paper, we address this challenge by proposing a multi-layered hierarchical NoC which utilizes an adaptive routing algorithm. The proposed routing algorithm determines nodes connecting higher layers at runtime which have a shorter hop count to the destination nodes. Depending on the criticality of the applications, the packets are forwarded on shorter or longer hop paths. An adaptive congestion avoidance feature is integrated. Without congestion awareness, the proposed algorithm which utilizes multiple layers has upto 38% decrease in latency and with congestion awareness has upto 56% decrease in latency compared to the popular XY routing. When comparing algorithms which use different layers, the algorithm with congestion awareness has upto 29% decrease in latency and upto 16% increase in throughput.
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Acknowledgements
This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - project number 146371743 - TRR 89: Invasive Computing.
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Anantharajaiah, N., Zhang, Z., Becker, J. (2021). Multi-layered NoCs with Adaptive Routing for Mixed Criticality Systems. In: Derrien, S., Hannig, F., Diniz, P.C., Chillet, D. (eds) Applied Reconfigurable Computing. Architectures, Tools, and Applications. ARC 2021. Lecture Notes in Computer Science(), vol 12700. Springer, Cham. https://doi.org/10.1007/978-3-030-79025-7_9
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DOI: https://doi.org/10.1007/978-3-030-79025-7_9
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