Android操作系統(tǒng)的低功耗設計和實現(xiàn).pdf

1、東南大學碩士學位論文roid操作系統(tǒng)的低功耗設計和實現(xiàn)姓名：余暉申請學位級別：碩士專業(yè)：電子科學與技術；微電子學與固體電子學指導教師：胡晨20110503AbstractAbstractInrecentyears，、)l，iththeincreasingoftheperformancereqmrememsinembeddedsystems，thepowerconsumptionalsisesquicklyInordertObalance

2、theperformanceandthestandbytimeofthesystemtheimplementationofthelowpowertechniquesisprovedtobethekeypoimintheresearchAndroid，thepopularoperatingsystemisusedtobethesoftwareplatforminthisthesisAndroidSuspendFrameworkandthe

3、subsystemofthedynamicpowermanagememaredesignedimplementedandoptimizedasneededoftheactualplatformInAndroidSuspendFrameworkAndroidSuspendBlocker(WakeLock)andAndroidEarlySuspendarebroughtinThesetwomechanismsareoptimizedanda

4、ppliedtotheactualplatformInorderteducethepowerconsumptionwhenthesystemisidle，thesleepmodeofAndroidisimplementedbasedontheTCC8902platformInthesubsystemofdynamicpowermanagement，theCPUidlemechamsmanddynamicfrequencyscalingm

5、echanismaredesignedandimplementedThroughtheapplicationofthesetwomechanisms，thepowerconsumptionatruntimecanbereducedFurthermore，theimprovedpolicyofthedynamicfrequencysealingmechanismisimplememedbasedoncomparingthepolicies

6、whichareusedcommonlyThetestsindicatethattheAndroidSuspendFrameworkandthesubsystemofthedynamicpowermanagementcanrunstably啊艙powermanagementofthesysteminthesleepmodeisconsummatedbytheimplementationofAndroidSuspendFrameworkT

7、hepowerconsumptionofthesystemintheEarlySuspendmodeisjust307％oftheconsumptioninthenormalmode，andafteroptimizingthevalueisreducedto226％InthesleepmodeofAndroidthepowerconsumptionisreducedtollmA(theratedvoltageis42V)，just33％

8、oftheconsumptioninthenormalmodeOver30％ofthepowerconsumptionatruntimecanbesavedduetOtheimplementationofthesubsystemofdynamicpowermanagementwhentheloadofthesystemislightKeywords：AndroidSuspendFrameworkWakeLockEarlySuspendD