简介:Bybenefitingfromthedevelopmentofthesemiconductortechnology,many-coresystem-on-chips(SoCs)havebeenwidelyusedinelectronicdevices.Network-on-chips(NoCs)canaddressthemassivestressofon-chipcommunicationsduetotheadvantagesofhighbandwidth,lowlatency,andgoodflexibility.Sincedeepsub-micronera,thereliabilityhasbecomeacriticalconstraintforintegratedcircuits.Toprovidecorrectdatatransmission,faulttolerantNoCshavebeenresearchedwidelyinlastdecades,andmanyvaluabledesignshavebeenproposed.Thisworkintroducesandsummarizesthestate-of-the-arttechnologiesforfaultdiagnosisandfaultrecoveryinfaulttolerantNoCs.Moreover,thisworkmakesprospectsforthefuture'sresearch.
简介:OccurrenceoffaultsinNetworkonChip(NoC)isinevitableasthefeaturesizeiscon-tinuouslydecreasingandprocessingelementsareincreasinginnumbers.Faultscanberevocableifitistransient.Transientfaultmayoccurinsiderouter,orinthecoreorincommunicationwires.Examplesoftransientfaultsareoverflowofbuffersinrouter,clockskew,crosstalk,etc..Revocationoftransientfaultscanbedonebyretransmissionoffaultypacketsusingobliviousoradaptiveroutingalgorithms.Irrevocablefaultscausesnon-functionalityofsegmentandmainlyoccursduringfabricationprocess.NoCreliabilityincreaseswiththeefficientroutingalgorithms,whichcanhandlethemaximumfaultswithoutdeadlockinnetwork.Astransientfaultsaretemporaryandcanbeeasilyrevokedusingre-transmissionofpacket,permanentfaultsrequireefficientroutingtoroutethepacketbybypassingthenonfunctionalsegments.Thus,ourfocusisontheanalysisofadaptiveminimalpathfaulttolerantroutingtohandlethepermanentfaults.ComparativeanalysisbetweenpartialadaptivefaulttoleranceroutingWest-First,North-Last,Negative-First,OddEven,andMinimalpathFaultTolerantrouting(MinFT)algorithmswiththenodesandlinksfailureisperformedusingNoCInterconnectRoutinGandApplicationModelingsimulator(NIRGAM)forthe2DMeshtopology.ResultsuggeststhatMinFTensuresdatatransmissionunderworstconditionsascomparedtootheradaptiveroutingalgorithms.
简介:Amongthecomponentsonamany-corechip,network-on-chip(NoC)hasalreadycontributedalargeportiontooverallpowerconsumption.OptimizingNoCperformanceunderagivenpowerbudgetisfurthercomplicatedtokeepthenetworkconnectivityandminimizethedetourdistances.Inthispaper,aNoCpowerbudgetingmethodfromthecommunicationperspectiveisproposed,whichintelligentlypowersoffrouters/linksandsetsupalternativepathstorestrictthepowerandthermalenvelop.Theeffectofperformanceoptimizaionoftheproposedpowerbudgetingmothodismeasuredbasedonlatencyandinthegivenpowerbudget,22%latencycanbereducedaveragelycomparedwithsomecompetingmethodswhenrunningrealbenchmarks.
简介:众所周知,志愿者是每一届奥运会成功举办的必要且充分条件,是奥运文化传承与传播的重要组成部分。作为奥林匹克运动三大支柱之一的NOC(国家和地区奥委会)在赛时需要一支专业化的志愿者团队为其提供高品质专业服务。本文研究的目的是通过对本人在2008年北京奥运会NOC志愿者专业化培训项目操作的实践进行全面总结和研究分析,为今后在我国举办高水平国际赛事的组委会,如北京2022冬奥会国际联络部,厘清一个NOC志愿者专业培训的逻辑维度、提供一些管理思路。本文采用文献法、访谈法、透过工作经历对NOC志愿者专业化培训项目进行研究。NOC志愿者经过实践论证是奥运会最为“通识”的志愿者群体,这一类志愿者是否能成长为能被各个国家代表团团长认可的“团长助理”是赛事承办方实现组织目标的重要保障。通过研究分析认为,专业化培训是培养一支高水平、具有战斗力的NOC志愿者团队最重要的环节。
简介:2007年7月,第五届“全国中小学信息技术创新与实践活动”(以下简称“NOC活动”)在重庆圆满结束。赛场的余温还未退去,第六届“NOC活动”的启动号角已经吹响,大赛筹备工作正在紧锣密鼓地进行着,第六届“NOC活动”网络创新竞赛将于10月底正式启动,并改名为“中国中小学信息技术创新与实践活动”。