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虚拟化环境下的多核NUMA架构性能优化系统CNA.docx

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虚拟化环境下的多核NUMA架构性能优化系统CNA Abstract Withtheacceleratingdevelopmentofvirtualizationtechnology,thedemandforvirtualizedenvironmentperformanceoptimizationisincreasing.NUMA(Non-UniformMemoryAccess)architectureiswidelyusedinvirtualizationenvironmentstoprovideimprovedperformance,scalabilityandreliability.However,theperformanceofmulti-coreNUMAarchitectureinvirtualizationenvironmentscanbeaffectedbyanumberoffactorssuchasloadimbalances,memoryallocationanddatalocality.Thispaperproposesaperformanceoptimizationsystemformulti-coreNUMAarchitectureinvirtualizationenvironments(CNA)thatisdesignedtoovercometheselimitationsandimproveperformance. Introduction VirtualizationisbecomingincreasinglypopularindatacentersandITinfrastructures.Itprovidesaconvenientandefficientwaytomanageresourcesandimproveserverutilization.Oneofthekeybenefitsofvirtualizationistheabilitytorunmultipleinstancesofoperatingsystemsonasinglephysicalplatform,allowingforbettersystemmanagementandimprovedresourceutilization.However,withsuchaflexibleanddynamicenvironmentcomeanumberofperformancechallenges.Inparticular,modernmulti-coreNUMAarchitecturesarewidelyusedinvirtualizationenvironments,buttheperformanceadvantagesofthesearchitecturescanbecompromisedbyarangeoffactorsincludingloadimbalances,memoryallocationanddatalocality. NUMAarchitecturehasbeenwidelyadoptedforhardwarevirtualizationinrecentyearsbecauseitenablesbettermemoryandI/OperformancecomparedwithtraditionalSymmetricalMultiprocessor(SMP)architectures.UnlikeSMPsystems,NUMAsystemsemployadistributedmemoryarchitecturewherememoryisdividedintomultipleregionsassociatedwithdifferentprocessors,andeachprocessorhasfasteraccesstoitslocalmemoryregions.Invirtualizationenvironments,eachvirtualmachine(VM)correspondstoasubsetofphysicalresources,includingprocessorscores,memorynodes,networkinterfacesandstoragedevices.Inamulti-coreNUMAarchitecture,thisdistributedarchitecturecanbeparticularlybeneficialasitallowsVMstobeassignedspecificcoresandmemorynodes,leadingtoimprovedperformance. However