面向科學計算的操作系統(tǒng)核心研究.pdf

1、中國科學院計算技術研究所碩士學位論文面向科學計算的操作系統(tǒng)核心研究姓名：陳曜申請學位級別：碩士專業(yè)：計算機系統(tǒng)結(jié)構(gòu)指導教師：孫凝暉20050101面向科學計算的操作系統(tǒng)核心研究：AbstractResearchonOperatingSystemKernelforScientificCalculationBasedApplicationsChenYao(ComputerArchitecture)DirectedByProfSunNingh

2、uiTheperformanceofasupercomputerismainlydecidedbyhardware，systemsoftware，algorithmsandapplicationsoftwareAppropriateoptimizationsandcustomizationsonsystemsoftwareforeachcategoryofapplicationscanincreaseapplicationperform

3、anceonsupercomputersScientificcalculationisanimportantusageofsupercomputersApplicationsbasedonscientificcaleulationusuallyhavelmgeworkingset，heavysystemload，andthereforeneedalotoftimetofinishTheinfluencesoftheoperatingsy

4、stemonperformanceofscientificcalculationalediscussedinthisdissertation，，includingnotonlytheinfluencesofOS’memorymanagementandprocessschedu【lingstrategiesbutalsotheimpactofnoisesgeneratedinOSkernelAndsomebriefanalysigande

5、xperimentsarecarriedoutuponafewpossibleoptimizingmethodsontheoperatingsystemforscientificcalculation，basedonabovediscussionresultAsuperpageallocatingmechanicsforuserprogramsisimplementedinthisdissertation，asasupplementof

6、thememorymanagementsubsysteminLinuxOSItcreatessuperpageframeswithlegacy4KBsizepageframes，anddirectlyassignsthemtouserprogramsthroughreallocatedSystemcalls，whicharedonebyakernelmodulesupportedinLinuxThismechanicsisnottran

7、sparenttoapplicationprogrammers，astheycandecidebythemselveswhethersuperpagesshouldbeusedintheirprograms，oradoptbothsuperpagesandlegacyonessimultaneouslyThenaseriesofperformanceevaluationsareperformedonthissuperpagebasedm

8、emorymanagementoptimizationTheresultsshowthatouroptimizationhasapositiveimpactontheperformanceofinternodecommunicationandtheperformanceofaddresstranslationinlocalvirtualmemoryThisdissertationanalyzestheinternodecommunica

9、tionpatternofHighPerformanceLinpack(HPL)benchmarkprogramonMyrinetsystemThetimeconsumptionofcommunicationandthepacketsdistributioninlengthareobservedandexamined，aswellastheimpactofproblemsizeNanddatablocksizeNBonthecommun

10、icationpattern，ThecharacteristicsofHPLbenchmarkprogram’sinternodecommunicationpatterninclustersarethendeterminedWiththeunderstandingofitscommunicationpatternandoursuperpageoptimizationapplied，aHPLperformancebenchmarkispe

11、rformedontheDawning4000AsupereomputerAnover4percentpeakperformanceimprovementisobservedcomparingtotheresultobtainedwithoutsuperpageoptimization，undert024CPUs’scale，Themaincontributionofthisdissertationare：(1)Dawning4000A

12、supercomputer，stwoplacesincrementintheTOP500ListofJune2004(with10thplace)；(2)about175percentincrementonthebandwidthofMyrinetwhenusing8MBpacketsKeywords：Scientificcalculation，OS，optimization，memorymanagement，superpage，noi