绿色路由器的低功耗FIS转发机制及其能耗分析.pdf

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1、计算机研究与发展DOI：10．7544“ssn1OOO一1239．2014．20110891JournalofComputerResearchandDevelopment51(5)：984—996，20l4绿色路由器的低功耗FIS转发机制及其能耗分析袁博戴艺汪斌强(国家数字交换系统工程技术研究中心郑州450002)。(国防科学技术大学计算机学院长沙410073)(yuanbonet@163．corn)ALow—PowerFISMechanismandEnergyAnalysisforGreenRouterYuanBo，DaiYi，andWangBinqiang(NationalDigitalS

2、witchingSystemEngineering＆TechnologyCenter．Zhengzhou450002)。(CollegeofComputer，NationalUniversityofDefenseTechnology，Changsha410O73)AbstractWiththedevelopmentofthenextgenerationInternet，theexistingrouterarchitecturefacesmanyproblems，suchasperformance，complexityandpowerconsumption．Withtheincreasingof

3、networksize，howtoimplementalow—powerforwardingisachallengeingreenandhigh—performancerouterdesign．Inthispaper，weconsiderbuildingaFISmechanismbasedonforwardinginswitchingidea．Thememoryrequiringandaccessingarereducedbyblurredlyforwardingandpipingswitching．ThemultilevellineframeworkinFISismadebymanyslow

4、processingunits．Itcanobtainhigherperformanceandlookupspeedthroughcosmicallyrunning．Simultaneously，itcanreducethecomplexityofhardwareimplementation．EnergymodelofFISandFBSisestablished．Weproposedifferentmodelingmethodologiesfornodeswitches，internalbuffersandinterconnectwiresinsideswitchfabricarchitect

5、ures．Inthispaperfourswitchfabricarchitecturesareana1yzedunderdifferenttrafficthroughputanddifferentnumbersofingress／egressports．Experimentsusingreal—liferoutingtablesdemonstratethatourFISsolutioncanreducethepowerofroutinglookupby12．59／6thanFBSclearly．Thisframeworkandanalysiscanbeappliedtothearchitec

6、turalexplorationforlowpowerhighperformancenetworkrouterdesigns．Keywordslowpower；greenrouter；routingforwarding；routinglookup；energyanalysis摘要随着互联网的发展，现有路由器体系结构在性能、复杂性和节能等方面存在许多难以克服的问题，如何实现高效节能的转发机制是绿色高性能路由器设计面临的重大挑战．基于边交换边转发思想提出一种边转发边交换(forwardinginswitching，FIS)机制，通过模糊转发流水交换减少了路由器转发和交换阶段的存储需求和访存次数．该

7、机制复用多个低速节点构成多级流水线结构，通过低成本执行部件的规模化运行提高交换性能和IP查找速率，可降低报文查表交换的硬件实现复杂度．建立了先转发后交换(forwardingbeforeswitching，FBS)机制和FIS机制的能耗模型，使用不同模型模拟内部缓存、输入输出端口等具有不同结构的节点，仿真实验证明FIS机制比现有的FBS机制减少约12．5的能耗．提出的分析模型适用于可扩展和绿色节能