多核片上网络cache一致性的实现方法分析

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1、万方数据广东工业大学硕士学位论文ABSTRACTDuetothecontinuousdevelopmentofthesemiconductortechnologymakestheprocessorofSOCnumberincreasing，thetraditionalbusorpoint—to·pointcommunicationstructurebegintoappearthepowerconsumption，delayandbandwidth，scalabilityandotherissues，aswellasglobalclocksynchroni

2、zationisdifficult，addressspaceislimited，unabletosupportthecommunicationofmulticoreparallel．Inordertosolvetheseproblems，thereisaneedforanewmethodofcommunicationbetweenthemulti—coreprocessor．Networkonchipemergeasthetimesrequire，anditisanewcommunicationmethod．Systemonchip，itsmainide

3、aistheapplicationofcomputernetworktechnologyinICdesign，inordertosolvethecommunicationproblemofinterconnectionbetweenmulti-coresystems．Becauseofthedemandofparallelprogramming，cachecoherenceproblemmustbeconsidered．TakingaimatNOCcachecoherenceprotocol，analysisNOCconsistentkeyproblem

4、indetailanddeeplyThispaperfirstanalysistheadvantagesofmulti—coreonchipnetwork，andfurtherresearchNOCcacheconsistencyproblem，analysistheNOCmulti—corecacheconsistencyrelatedknowledge．IntroductNOCarchitecture，topologystructure，flowcontrolmechanismandroutingstructureandroutingalgorith

5、msandcachereplacementalgorithm，cachewritestrategy,snoopingprotocols，directoryprotocolsandNOCcachecoherencecharacteristics．BasedonMESIprotocolsanddirectoryprotocol，putforwardanewNOCcachecoherenceprotoc01．Sharedmemoryineachdatablockhasadirectory，recordingcopystatusofdatablocksinthe

6、nucleus．Eachprocessorhasacachecontroller，usedtorecordthestatusofcache，aswellastoreadandwritecacheprocessing．FocusesonNOCcacheconsistencycommunicationproblems，proposeabroadcastroutingmechanismwhichrealizingthemasternodebroadcastscacheinvaliddatapackettothedestinationnodeandarbitra

7、lpriorityroutingforcompetingthesharedmemory．Trytoreducethedelay，ensurethecoherenceofcache．Finallyintroductthedatapacketformat，networkinterfacebetweenIPandNoCandrouteroverallstructureindetail万方数据ABSTRACTInthesoftwareplatform，combinewiththeclassicalvirtualchannelroutingmechanismand

8、theNOCcachecoherenceprotocol，buildthecom