Abstract
Silicon photonic interconnects on chip is an emerging technology for future ultra-scale and data-intensive computing chips, e.g., many-core processors, owing to its high transmission speed and low latency. However, in the Wavelength Division Multiplexing (WDM)-based architecture, the communication reliability can be significantly affected by the signal losses and crosstalk, due to the inherent characteristic of photonic devices. This paper studies the influence on reliability of managing application mapping and wavelength assignment separately. To deal with this issue, we propose a reliability-aware joint design method coordinating application mapping and wavelength assignment schemes. For a given application core graph and a network architecture, the design method can obtain a result of application mapping and wavelength assignment with improved reliability, compared to the separate scheme. According to the evaluation of Optical Signal-to-Noise Ratio (OSNR), the proposed method enables more reliable communication under given applications.
Highlights
Silicon photonic interconnects on chip is promising to improve the communication performance of the future multi/many-core processors, providing high transmission speed and low latency for high-performance computing applications [1]
In silicon photonic interconnects on chip, data is transmitted in optical waveguides in the form of optical signals
In this paper, we propose a novel joint method to map the applications onto the network architecture, with the consideration of wavelength assignment to improve communication reliability
Summary
Silicon photonic interconnects on chip is promising to improve the communication performance of the future multi/many-core processors, providing high transmission speed and low latency for high-performance computing applications [1]. The mapping result of a specific application can affect the relative locations of parallel communications in a network architecture, which influences the losses and crosstalk to an expected signal. In this work, we propose a reliability-aware joint design method of application mapping and wavelength assignment for the WDM-based silicon photonic interconnects on chip, based on reliability analysis model. A joint design method is proposed by taking into consideration of both application mapping and wavelength assignment, to reduce the signal loss and crosstalk, thereby improving the communication reliability. A reliability-aware application mapping scheme and a reliability-aware wavelength assignment scheme are designed, based on our reliability model In this model, the transmission property of MR is used for the loss and crosstalk evaluation.
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