支持多媒體計算的可重構(gòu)Cache研究與設(shè)計.pdf

1、湖南大學碩士學位論文支持多媒體計算的可重構(gòu)Cache研究與設(shè)計姓名：舒晰申請學位級別：碩士專業(yè)：計算機系統(tǒng)結(jié)構(gòu)指導教師：李小堅李仁發(fā)20080512圣絲量堡竺蘭蘭竺里莖絲呈絲：絲窒主堡墼AbstractRecently，multimediacomputingisadominatingworkloadintheresearchfieldofcomputerscienceItisapplicabletoproductionandliving

2、widelyinembeddedsystemsMultimediacomputingnormallyhaslargedatasetsandvariousdatatypes，therefore，thebehaviorofmemorysystemhasastrongeffectontheperformanceAstheembededdevices’abilityofpowersupplyingisstrictlylimitedbysizea

3、ndweight，itisnecessarytoresearchonperformanceandpowerconsumptioninmemoryarchitecturewhichsupportsmultimediacomputingAsthebridgebetweenprocessorandmemory，Cacheplaysanimportantrole，meanwhileitoccupieslargechipareaandbecome

4、sthemainsourceoftheenergyconsumptionIntheinterestsofhighperformanceandlowpowerconsumptioninmemoryarchitecture，threekindsofCachemodelshavebeenproposed，whichusethereconfiguratiOnstrategybasedontherequirementsofthemultimedi

5、asystemTBLRCisalinereconfigurableCachebasedontimesliceMostofthemultimediaapplicationsuseblock—partitioningalgorithmsinwhichlargeinputfilesaredividedintosmallblocks，andthedividedblockshavegoodspatiallocalityThestrategydyn

6、amicallychangesreplacinglinesizetoadapttothesizeofthedatablockthroughobservingthereferenceflagsofadjaeentbaselinesSoitcanmakefulluseofthespatiallocalityteduceCachemissrateandimprovetheefficiencyofdatapefetchTBWRCisawayre

7、configurableCachebasedontimeslice、；Vhentheassociativitiesincrease，thedecreaseofconflictmisswillreduceCachemissrate，howeverSRAMaccesseswillconsumemoredynamicenergybecauseofthecomplexityofthecontrolcircuitTBWRCdynamicallyc

8、hangestheassociativitiesofCachethroughanalyzingthecharacteristicsofdifferentprogramphasesinorderteducedynamicenergysignificantlywithsmallperformancedegradationInTBWRC，aselftuningthresholdalgorithmhasbeenproposedThroughre

9、cordingthehitcountofLeastWayandExtraWay，itcanprovidejudgementforway—reconfigurationTheaccuracyofreconfigurationinTBWRCisbetterthanSearchHeuristicsinthecontrastingmodelTBLAWRCisalineandwayreconfigurableCachebasedontimesli