1.4 Operating System Structure Multiprogramming(Batch system) needed for efficiency Single user cannot keep CPU and I/O devices busy at all times Multiprogramming organizes jobs (code and data) so CPU always has one to executelA subset of total jobs in system is kept in memory One job selected...
Chapter3:Operating-SystemStructures 了解一个操作系统的结构 OperatingSystemServices UserOperatingSystemInterface SystemCalls TypesofSystemCalls SystemPrograms OperatingSystemDesignandImplementation OperatingSystemStructure VirtualMachines OperatingSystemGeneration SystemBoot23.1系统组成 进程管理 内存管理 文件管理 输入/输出...
1、Chapter 2: Operating-System Structures,Chapter Objectives,View OS from: Services Interfaces Components and Interconnections To describe the services an operating system provides to users, processes, and other systems To discuss the various ways of structuring an operating system To explain how opera...
Programexecution-Thesystemmustbeabletoloadaprogramintomemoryandtorunthatprogram,endexecution,eithernormallyorabnormally(indicatingerror)I/Ooperations-ArunningprogrammayrequireI/O,whichmayinvolveafileoranI/Odevice.File-systemmanipulation-Thefilesystemisofparticularinterest.Obviously,programsneedtoreadandwritefilesand...
may trigger an interrupt by executing a special operation called a system call 事件通常由中断触发,硬件中断由硬件通过系统总线发信号给CPU触发,软件中断通过执行系统调用触发。 Operating-System Structure One of the most important aspects of operating systems is the ability ...
Operating-system structure:Operating system is a set of processes or threadsRace condition 竞争的条件 // 划的重点 When multiple processes or threads access shared resource so that the final result depends on the order of execution of instructions in the multiple processes ...
operating system《操作系统》ch01-introduction-44 ComputerScience&TechnologySchoolofShanDongUniversity&SoftwareCollege OperatingSystem CourseNo:0303100111Instructor:HouMengbo(Dr.&AssociateProf.)Email:houmbATsdu.edu.cn Office:InstituteofInformationSecurity.SpecialistBuildingRm.324,SoftwareCampus,SDU Introduction ...
CHAPTER 3 OPERATING SYSTEM STRUCTURE 《操作系统概念》英文版课件.ppt,CHAPTER 3 OPERATING SYSTEM STRUCTURE OS Components OS Services (for designer) OS API (for programmers) OS Apps (for application users) OS Structures OS Generation OS COMPONENTS Process m
Programexecution-Thesystemmustbeabletoloadaprogramintomemoryandtorunthatprogram,endexecution,eithernormallyorabnormally(indicatingerror)I/Ooperations-ArunningprogrammayrequireI/O,whichmayinvolveafileoranI/Odevice.File-systemmanipulation-Thefilesystemisofparticularinterest.Obviously,programsneedtoreadandwrite...
communications, and protection. 系统调用分为六大类:进程控制,文件操作,设备操作,信息维护,通信,保护。 Operating-System Structure Simple Structure Everything below the system-call interface and above the physical hardware is the kernel. The kernel provides the file system, CPU scheduling, memory ...