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多道程序设计是指
程序和与其有关进程的对应关系是
若程序Pa和Pb单独执行时分别用Ta和TbTa=1小时Tb=1.5小时其中处理器工作时间分别ta=18分钟tb=27分钟如果采用多道程序设计方法让PaPb并行工作假定处理器利用率达到50%另加15分钟系统开销请问系统效率能提高多少
程序是______进程是______
进程控制块具有哪些作用
在一个单处理器系统中处于运行状态的进程
Forcenturiesthenatureofthebrainwasshroudedinmystery.Aristotleissaidtohave1itwasacoldspongewhosemaintaskwasto2theblood.LaterLeonardodaVinci3thebrainasacuriousvoidfilledbythreetinybulbousstructures4inastraightline5theeyeball. Notallearlytheorieswerequitesomisguided6.Fromthefirststudies7languagedeficitsitwas8thatthebrainplayedsomedirectpartinlanguageuse.In1836an9FrenchcountrydoctorMaxDaxclaimedthatinfortyaphasic患失语症的patientshehadseen10oflanguageabilityalways11withdamagetothelefthalfofthebrain.Thirtyyearslaterthisclaimwas12provedbytheFrenchsurgeonPaulBroca.Hehadstudiedaphasic13inpatientswhowerefoundtohavebraindamage14theleftfrontallobe.Brocawasstruckbythecontrastwithrighthemispheredamage15seemedtohavelittleeffectonspeech.TheareaBrocaisolatedandtheaphasiaassociatedwithitnow16hisnameBroca’’saphasia. TenyearsafterBroca’’s17KarlWernickeayoungresearcherinGermanymadeanotherstartling18whichultimately19himtoproposenotjustanewlanguageareabutanoveralltheoryof20languageishandledinthebrain.
非可抢占式和抢占式进程调度的区别是什么
Forcenturiesthenatureofthebrainwasshroudedinmystery.Aristotleissaidtohave1itwasacoldspongewhosemaintaskwasto2theblood.LaterLeonardodaVinci3thebrainasacuriousvoidfilledbythreetinybulbousstructures4inastraightline5theeyeball. Notallearlytheorieswerequitesomisguided6.Fromthefirststudies7languagedeficitsitwas8thatthebrainplayedsomedirectpartinlanguageuse.In1836an9FrenchcountrydoctorMaxDaxclaimedthatinfortyaphasic患失语症的patientshehadseen10oflanguageabilityalways11withdamagetothelefthalfofthebrain.Thirtyyearslaterthisclaimwas12provedbytheFrenchsurgeonPaulBroca.Hehadstudiedaphasic13inpatientswhowerefoundtohavebraindamage14theleftfrontallobe.Brocawasstruckbythecontrastwithrighthemispheredamage15seemedtohavelittleeffectonspeech.TheareaBrocaisolatedandtheaphasiaassociatedwithitnow16hisnameBroca’’saphasia. TenyearsafterBroca’’s17KarlWernickeayoungresearcherinGermanymadeanotherstartling18whichultimately19himtoproposenotjustanewlanguageareabutanoveralltheoryof20languageishandledinthebrain.
时间片轮转调度算法中时间片取值的大小关系到计算机系统的效率和用户的满意程序时间片取值一般应根据______和______来决定
常用的进程调度算法有______优先数时间片轮转以及______等算法
Forcenturiesthenatureofthebrainwasshroudedinmystery.Aristotleissaidtohave1itwasacoldspongewhosemaintaskwasto2theblood.LaterLeonardodaVinci3thebrainasacuriousvoidfilledbythreetinybulbousstructures4inastraightline5theeyeball. Notallearlytheorieswerequitesomisguided6.Fromthefirststudies7languagedeficitsitwas8thatthebrainplayedsomedirectpartinlanguageuse.In1836an9FrenchcountrydoctorMaxDaxclaimedthatinfortyaphasic患失语症的patientshehadseen10oflanguageabilityalways11withdamagetothelefthalfofthebrain.Thirtyyearslaterthisclaimwas12provedbytheFrenchsurgeonPaulBroca.Hehadstudiedaphasic13inpatientswhowerefoundtohavebraindamage14theleftfrontallobe.Brocawasstruckbythecontrastwithrighthemispheredamage15seemedtohavelittleeffectonspeech.TheareaBrocaisolatedandtheaphasiaassociatedwithitnow16hisnameBroca’’saphasia. TenyearsafterBroca’’s17KarlWernickeayoungresearcherinGermanymadeanotherstartling18whichultimately19himtoproposenotjustanewlanguageareabutanoveralltheoryof20languageishandledinthebrain.
中断优先级的高低顺序为______自愿中断程序性中断外部中断租______
进程由程序和数据两部分组成
Forcenturiesthenatureofthebrainwasshroudedinmystery.Aristotleissaidtohave1itwasacoldspongewhosemaintaskwasto2theblood.LaterLeonardodaVinci3thebrainasacuriousvoidfilledbythreetinybulbousstructures4inastraightline5theeyeball. Notallearlytheorieswerequitesomisguided6.Fromthefirststudies7languagedeficitsitwas8thatthebrainplayedsomedirectpartinlanguageuse.In1836an9FrenchcountrydoctorMaxDaxclaimedthatinfortyaphasic患失语症的patientshehadseen10oflanguageabilityalways11withdamagetothelefthalfofthebrain.Thirtyyearslaterthisclaimwas12provedbytheFrenchsurgeonPaulBroca.Hehadstudiedaphasic13inpatientswhowerefoundtohavebraindamage14theleftfrontallobe.Brocawasstruckbythecontrastwithrighthemispheredamage15seemedtohavelittleeffectonspeech.TheareaBrocaisolatedandtheaphasiaassociatedwithitnow16hisnameBroca’’saphasia. TenyearsafterBroca’’s17KarlWernickeayoungresearcherinGermanymadeanotherstartling18whichultimately19himtoproposenotjustanewlanguageareabutanoveralltheoryof20languageishandledinthebrain.
在单处理机系统中处于运行状态的进程不止一个
采用多道程序设计技术后可有效地提高系统中资源的______增加单位时间的算题量从而提高了系统的______
进程被创建后最初处于______状态经过进程调度程序选中后进入______状态
Forcenturiesthenatureofthebrainwasshroudedinmystery.Aristotleissaidtohave1itwasacoldspongewhosemaintaskwasto2theblood.LaterLeonardodaVinci3thebrainasacuriousvoidfilledbythreetinybulbousstructures4inastraightline5theeyeball. Notallearlytheorieswerequitesomisguided6.Fromthefirststudies7languagedeficitsitwas8thatthebrainplayedsomedirectpartinlanguageuse.In1836an9FrenchcountrydoctorMaxDaxclaimedthatinfortyaphasic患失语症的patientshehadseen10oflanguageabilityalways11withdamagetothelefthalfofthebrain.Thirtyyearslaterthisclaimwas12provedbytheFrenchsurgeonPaulBroca.Hehadstudiedaphasic13inpatientswhowerefoundtohavebraindamage14theleftfrontallobe.Brocawasstruckbythecontrastwithrighthemispheredamage15seemedtohavelittleeffectonspeech.TheareaBrocaisolatedandtheaphasiaassociatedwithitnow16hisnameBroca’’saphasia. TenyearsafterBroca’’s17KarlWernickeayoungresearcherinGermanymadeanotherstartling18whichultimately19himtoproposenotjustanewlanguageareabutanoveralltheoryof20languageishandledinthebrain.
进程可以并发执行若干个并发执行的进程交替占用处理器而进程各种状态的转换不是事先预定的也不是完全由操作系统来确定的而是在硬件和操作系统的相互配合下完成的起主要作用的是______
中断处理程序从当前PSW寄存器中取出中断码来分析发生中断的事件
Forcenturiesthenatureofthebrainwasshroudedinmystery.Aristotleissaidtohave1itwasacoldspongewhosemaintaskwasto2theblood.LaterLeonardodaVinci3thebrainasacuriousvoidfilledbythreetinybulbousstructures4inastraightline5theeyeball. Notallearlytheorieswerequitesomisguided6.Fromthefirststudies7languagedeficitsitwas8thatthebrainplayedsomedirectpartinlanguageuse.In1836an9FrenchcountrydoctorMaxDaxclaimedthatinfortyaphasic患失语症的patientshehadseen10oflanguageabilityalways11withdamagetothelefthalfofthebrain.Thirtyyearslaterthisclaimwas12provedbytheFrenchsurgeonPaulBroca.Hehadstudiedaphasic13inpatientswhowerefoundtohavebraindamage14theleftfrontallobe.Brocawasstruckbythecontrastwithrighthemispheredamage15seemedtohavelittleeffectonspeech.TheareaBrocaisolatedandtheaphasiaassociatedwithitnow16hisnameBroca’’saphasia. TenyearsafterBroca’’s17KarlWernickeayoungresearcherinGermanymadeanotherstartling18whichultimately19himtoproposenotjustanewlanguageareabutanoveralltheoryof20languageishandledinthebrain.
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