{"title":"Traffic-Adaptive Power Reconfiguration for Energy-Efficient and Energy-Proportional Optical Interconnects","authors":"Yuyang Wang, K. Cheng","doi":"10.1109/ICCAD51958.2021.9643475","DOIUrl":null,"url":null,"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.","PeriodicalId":370791,"journal":{"name":"2021 IEEE/ACM International Conference On Computer Aided Design (ICCAD)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE/ACM International Conference On Computer Aided Design (ICCAD)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICCAD51958.2021.9643475","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
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.