基于SEP6200的UBIFS文件系統(tǒng)的分析與優(yōu)化.pdf

1、東南大學(xué)碩士學(xué)位論文基于SEP6200的UBIFS文件系統(tǒng)的分析與優(yōu)化姓名：時(shí)貴均申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：集成電路工程；嵌入式系統(tǒng)指導(dǎo)教師：陸生禮；刁龍20120517AbstractWimtherapiddevelopmentofembeddedfilesystemtechnologythecurrentmains仃eamNANDflashfilesystemcannotmeettherequirementsinfunctionand

2、performanceaspectsThesefilesystemshavesomedisadventages：longstartuptime，muchmemoryconsumptionbadwearlevelingandSOOILAnewtypeofNANDflashfilesystemwhichnamedUBIFShassolvedsomedisadventagesabove，butithasimprovingpotentialTh

3、isthesisanaly∞sUBIFSandgivessomeandoptimizationwhichhasbeenusedinSEP6200platformThisthesisanalyzesthephysicalcharacteristicsandchallengesofNANDflashThentheUBIFS’Sarchitecture，startupprocess，filesystemsoperatingandwearlev

4、elingmechanismaledeeplyanalyzedwhichalsoprovidethebasicknowlegmentandreferencefortheoptimizationdesignInthisthesis，theoptimizationalgorithmisproposedwithdynamicwearlevelingthresholdtosolvetheshortageofsinglewearlevelingt

5、hresholdThenthisthesisgiveadesignteducethefiequencyofwearlevelingwhichhassolvedtheproblemthathi【ghfrequencyofwearlevelinginerasingphysicalblocksTheplatformbasedonSEP6200hasbeenperformedtovalidatethedesignandrealizationof

6、theoptimizedUBIFSThestartuptime，file’SreadandwritespeedwearlevelinghavebeentestedTheexperimentalresultsshowthatstartuptimeisreducedby20％andthewriteperformanceisincreasedby10％comparedtotheoriginaloneKeywords：Embeddedsyste