Traffic-Adaptive Power Reconfiguration for Energy-Efficient and Energy-Proportional Optical Interconnects

Yuyang Wang, K. Cheng
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Abstract

Silicon microring-based optical interconnects offer great potential for high-bandwidth data communication in future datacenters and high-performance computing systems. However, a lack of effective runtime power management strategies for optical links, especially during idle or low-utilization periods, is devastating to the energy efficiency and the energy proportionality of the network. In this study, we propose Polestar, i.e., POwer LEvel Scaling with Traffic-Adaptive Reconfiguration, for microring-based optical interconnects. Polestar offers a collection of runtime reconfiguration strategies that target the power states of the lasers and the microring tuning circuitry. The reconfiguration mechanism of the power states is traffic-adaptive for exploiting the trade-off between energy saving and application execution time. The evaluation of Polestar with production datacenter traces demonstrates up to 87 % reduction in pJ/b consumption and significant improvements in energy proportionality metrics, notably outperforming existing strategies.
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高能效和能量比例光互连的流量自适应功率重构
基于硅微晶的光互连在未来的数据中心和高性能计算系统中为高带宽数据通信提供了巨大的潜力。然而,缺乏有效的光链路运行时功率管理策略,特别是在空闲或低利用率时期,对网络的能量效率和能量比例是毁灭性的。在这项研究中,我们提出了Polestar,即功率电平缩放与流量自适应重构,用于基于微微的光互连。Polestar提供了一系列针对激光器和微环调谐电路的功率状态的运行时重构策略。电源状态的重新配置机制是流量自适应的,可以在节能和应用程序执行时间之间进行权衡。对带有生产数据中心轨迹的Polestar的评估表明,pJ/b消耗降低了87%,能源比例指标显著改善,明显优于现有策略。
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