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- W3036706633 abstract "Optical network-on-chip (ONoC) is an emerging communication architecture for manycore systems due to low latency, high bandwidth, and low power dissipation. However, a major concern lies in its thermal susceptibility - under on-chip temperature variations, functional nanophotonic devices, especially microring resonator (MR)-based devices, suffer from significant thermal-induced optical power loss, which potentially counteracts the power advantages of ONoCs and even cause functional failures. Considering the fact that temperature gradients are typically found on many-core systems, effective thermal monitoring, performing as the foundation of thermal-aware management, is critical on ONoCs. In this paper, a lightweight thermal monitoring scheme is proposed for ONoCs. We first design a temperature measurement module based on generic optical routers. It introduces trivial overheads in chip area by reusing the components in routers. A major problem with reusing optical routers is that it may potentially interfere with the normal communications in ONoCs. To address it, we then propose a time allocation strategy to schedule thermal sensing operations in the time intervals between communications. Evaluation results show that our scheme exhibits an untrimmed inaccuracy of 1.0070 K with low energy consumption of 656.38 pJ/Sa. It occupies an extremely small area of 0.0020 mm2, reducing the area cost by 83.74% on average compared to the state-of-the-art optical thermal sensor design." @default.
- W3036706633 created "2020-06-25" @default.
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- W3036706633 date "2020-03-01" @default.
- W3036706633 modified "2023-09-27" @default.
- W3036706633 title "Lightweight Thermal Monitoring in Optical Networks-on-Chip via Router Reuse" @default.
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- W3036706633 doi "https://doi.org/10.23919/date48585.2020.9116351" @default.
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