第页共NUMPAGES42页幻灯片1幻灯片2幻灯片3幻灯片4幻灯片5幻灯片6幻灯片7幻灯片8幻灯片9幻灯片10幻灯片11幻灯片12幻灯片13幻灯片14幻灯片15幻灯片16幻灯片17幻灯片18幻灯片19幻灯片20幻灯片21幻灯片22幻灯片23幻灯片24幻灯片25幻灯片26幻灯片27幻灯片28幻灯片29幻灯片30幻灯片31幻灯片32幻灯片33幻灯片34幻灯片35Primarydifferencebetweenthetwoimplementations(atthislevel)are:TheIntelprocessorhasasmallerL1butlargerL2caches.SharedL2cachevs.separateSharedcacheallowsalargercachetobeavailabletoonecoreifitneedsit(andassumestheothercoredoesnotneedit).Thisisdynamicallocationofthecacheresource.3.Integratedmemorycontrollervs.non-integratedThepresenceoftheSystemRequestInterface,Crossbar,andthehigh-speedserialinterface(HyperTransport)arealllogicalresultsofhavinganintegratedmemorycontrollerItisdifficulttosaywhichimplementation/systemarchitectureisbetter.Theysimplyareadifferentmeanstotheend.Whatmattersishowtheyperformonagivenworkload.幻灯片36幻灯片37幻灯片38幻灯片39IntelTurboBoostTechnologyincreasesperformanceofbothmulti-threadedandsinglethreadedworkloads.IntelTurboBoostTechnologyisactivatedwhentheOperatingSystem(OS)requeststhehighestprocessorperformancestate(P0).ThemaximumfrequencyofIntel®TurboBoostTechnologyisdependentonthenumberofactivecores.TheamountoftimetheprocessorspendsintheIntelTurboBoostTechnologystatedependsontheworkloadandoperatingenvironment,providingtheperformanceyouneed,whenandwhereyouneedit.AnyofthefollowingcansettheupperlimitofIntelTurboBoostTechnologyonagivenworkload:NumberofactivecoresEstimatedcurrentconsumptionEstimatedpowerconsumptionProcessortemperatureWhentheprocessorisoperatingbelowtheselimitsandtheuser'sworkloaddemandsadditionalperformance,theprocessorfrequencywilldynamicallyincreaseby133MHzonshortandregularintervalsuntiltheupperlimitismetorthemaximumpossibleupsideforthenumberofactivecoresisreached.Conversely,whenanyofthelimitsarereachedorexceeded,theprocessorfrequencywillautomaticallydecreaseby133MHzuntiltheprocessorisagainoperatingwithinitslimits.Examplefor4CTurbooperation:Adatabasequery,whichdoesn'tuse