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1、OperatingSystemSupportforMultimedia:TheProgrammingModelMattersJohnRegehr,MichaelB.Jones†,JohnA.StankovicSeptember2000TechnicalReportMSR-TR-2000-89DepartmentofComputerScience†MicrosoftResearch,MicrosoftCorporationThorntonHall,UniversityofVirginiaOneMicrosoftWay,Building112/2156Charl
2、ottesville,VA22903-2242,USARedmond,WA98052,USAjohn@regehr.org,stankovic@cs.virginia.edumbj@microsoft.comhttp://www.cs.virginia.edu/holsthttp://research.microsoft.com/˜mbjMicrosoftResearchMicrosoftCorporationOneMicrosoftWayRedmond,WA98052http://research.microsoft.comOperatingSystemS
3、upportforMultimedia:TheProgrammingModelMattersJohnRegehr,MichaelB.Jones†,JohnA.StankovicDepartmentofComputerScience†MicrosoftResearch,MicrosoftCorporationThorntonHall,UniversityofVirginiaOneMicrosoftWay,Building112/2156Charlottesville,VA22903-2242,USARedmond,WA98052,USAjohn@regehr.
4、org,stankovic@cs.virginia.edumbj@microsoft.comhttp://www.cs.virginia.edu/holsthttp://research.microsoft.com/˜mbjSeptember2000Abstracttinuousmedia)requiresoftreal-timeservicefromMultimediaisanincreasinglyimportantpartoftheoperatingsystem.themixofapplicationsthatusersrunonpersonalThe
5、setofabstractionsandconventionsimple-computersandworkstations.Therequirementsmentedbyaparticularsystemthatallowsoftreal-placedonamultimediaoperatingsystemarede-timeapplicationstomeettheirrequirementsdefinesmandingandoftenconflicting:untrusted,indepen-aprogrammingmodel.Amultimediasche
6、dulerdentlywrittensoftreal-timeapplicationsmustbemustsupportaprogrammingmodelthatisusefulabletocoexistwithoutinterferingwitheachother.andunderstandabletothepeoplewhodevelopap-Thismustbeaccomplishedwhilerequiringaslit-plicationsforthesystem.Furthermore,thesched-tleextraeffortaspossi
7、blefromapplicationdevel-uler,inconjunctionwithapplications,mustmeetopers,andtheresultingsystemmustbeusableanduserexpectationsandprovideunderstandablebe-understandablebyendusersevenwhenapplicationhaviorinthefaceofsetsofapplicationsthatdemandresourcerequirementsexceedsystemcapacity.r
8、esourcesexceedingthecapaci
