Harnessing the power of emerging petascaleplatforms治理浮华地力量 平台.pdf

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1、JournalofPhysics:ConferenceSeriesRelatedcontent-HPCToolkit:performancetoolsforHarnessingthepowerofemergingpetascalescientificcomputingNTallent,JMellor-Crummey,LAdhiantoplatformsetal.-SciDAC2007DavidEKeyesTocitethisarticle:JohnMellor-Crummey2007J.Phys.:Conf.Ser.78012048-Mana

2、ginglocalityingrandchallengeapplications:acasestudyofthegyrokinetictoroidalcodeGMarin,GJinandJMellor-CrummeyViewthearticleonlineforupdatesandenhancements.Recentcitations-BibliographyThiscontentwasdownloadedfromIPaddress117.165.43.125on24/08/2018at06:30SciDAC2007IOPPublishin

3、gJournalofPhysics:ConferenceSeries78(2007)012048doi:10.1088/1742-6596/78/1/012048HarnessingthepowerofemergingpetascaleplatformsJohnMellor-CrummeyAssociateProfessor,DepartmentofComputerScience,RiceUniversity,Houston,TX,USAE-mail:johnmc@cs.rice.eduAbstract.AspartoftheUSDepart

4、mentofEnergy’sScientificDiscoverythroughAdvancedComputing(SciDAC-2)program,scienceteamsaretacklingproblemsthatrequirecomputationalsimulationandmodelingatthepetascale.Agrandchallengeforcomputerscienceistodevelopsoftwaretechnologythatmakesiteasiertoharnessthepowerofthesesystem

5、stoaidscientificdiscovery.Aspartofitsactivities,theSciDAC-2CenterforScalableApplicationDevelopmentSoftware(CScADS)isbuildingopensourcesoftwaretoolstosupportefficientscientificcomputingontheemergingleadership-classplatforms.Inthispaper,wedescribetwotoolsforperformanceanalysisand

6、tuningthatarebeingdevelopedaspartofCScADS:atoolforanalyzingscalabilityandperformance,andatoolforoptimizingloopnestsforbetternodeperformance.WemotivatethesetoolsbyshowinghowtheyapplytoS3D,aturbulentcombustioncodeunderdevelopmentatSandiaNationalLaboratory.ForS3D,ournodeperfor

7、manceanalysistoolhelpeduncoverseveralperformancebottlenecks.Usingourloopnestoptimizationtool,wetransformedS3D’smostcostlyloopnesttoreduceexecutiontimeby3afactorof2.94foraprocessorworkingona50domain.1.IntroductionHarnessingthepowerofemergingpetascalecomputationalplatformstoa

8、idscientificdiscoveryposesagrandchallengeforcomputerscience.Programmingpetascalesys