An Approximation Algorithm for Energy-Efficient Scheduling on A Chip Multiprocessor

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1、AnApproximationAlgorithmforEnergy-EfficientSchedulingonAChipMultiprocessor∗Chuan-YueYang,Jian-JiaChen,andTei-WeiKuoDepartmentofComputerScienceandInformationEngineering,GraduateInstituteofNetworkingandMultimedia,NationalTaiwanUniversity,Taipei,Taiwan,ROC.Em

2、ail:{r92032,r90079,ktw}@csie.ntu.edu.twAbstractperformanceimprovementisoftendonebyincreasingtheprocessorfrequencybutatthecostofenergyconsumption.Intherecentdecade,voltagescalinghasbecomeanat-Whenenergyconsumptionandsystemperformancemustbetractivefeaturefo

3、rmanysystemcomponentdesigns.Inthisconsideredatthesametime,themultiprocessorarchitecturepaper,weconsiderenergy-efficientreal-timetaskschedulingseemsbeingareasonablechoice,especiallyformultipro-overachipmultiprocessorarchitecture.Theobjectiveistogrammingenvi

4、ronments(e.g.,[16]).Thechip-multiprocessorscheduleasetofframe-basedtaskswiththeminimumenergyarchitectureisproposedasanattempttoovercomethechip-consumption,wherealltasksarereadyattime0andshareaspaceconstraintandtheprocessorcommunicationdelaycommondeadline.

5、Weshowthatsuchaminimizationprob-problemforthemultiprocessorarchitecture.WithaslightlemisNP-hardandthenproposea2.371-approximational-increasingonthediesize,multipleprocessors,i.e.,cores,gorithm.Thestrengthoftheproposedalgorithmwasdemon-aremountedonasingled

6、ietoretainmanyadvantagesofthestratedbyaseriesofsimulations,forwhichnearoptimalre-multiprocessorarchitecturebutwithonlycomparativelylowsultswereobtained.wiredelay.Whilemanyexcellentresearchresultshavebeenproposedforuniprocessorenergy-efficientscheduling,e.g

7、.,[2,5,12,14,19,20],littleworkhasbeendoneformulti-1Introductionprocessorsystems,e.g.,[4,8,21],eventhoughthemultipro-cessorarchitecturehasbecomeincreasinglypopularinvari-ousplatforms.Thestrongdemandformultiprocessorenergy-Withtheincreasingpopularityandprev

8、ailingsupportsonefficientschedulingisnotonlyfromserversystemsbutalsovoltagescalingforelectroniccircuits,energyefficiencyhasfromtheembeddedsystems,suchasSystem-on-Chipsys-becomeahighlyimportantdesignissueinhardwareands