快速自适应调频机制及其在NetFPGA上的实现

Fast Adaptive Speed Scaling Mechanism and Implementation on NetFPGA Platform

降低网络设备能耗已经成为当前研究的热点.文中,作者设计了一种能够实时适应流量变化的动态自适应频率调整方法FASS,它能根据处理模块的负载,实时地调整模块的工作频率,从而有效降低模块的能耗.同时,作者通过修改NetFPGA的参考路由器设计,将FASS添加到数据包处理模块中来验证FASS的性能.马尔可夫模型分析结果和实际实验的测试结果表明,在仅增加可容忍的延迟的情况下,FASS在多种不同的负载情况下,都能有效地降低模块功耗.另外,作者的工作说明FASS可以应用于实际的物理设备中以实现节能.

The concept of energy-efficient networking has been a hot research topic in the past few years, gaining increasing popularity. In this paper, we design a fast adaptive speed scaling mechanism to reduce power consumption of network devices. The operation frequency of components in a network device is adjusted dynamically to different levels according to the real time workload. We implement a prototype of this mechanism in the data path of a general IPv4 router based on a real hardware platform NetFPGA. The theoretical analysis and experimental results show excellent energy savings at the cost of a tolerable latency, under various ranges of traffic loads. Our work indicates the feasibility and possibility of deploying the mechanism into real network devices for energy saving.