Network Structure Local Area Networks (LAN) Wide Area Networks (WAN) Local Area Network Structure Wide Area Network Structure OS system components CPU - Process management Memory - Main-memory management Disk - File management Storage system - Secondary-storage management I/O - I/O-system ...
35、,Simple Structure MS-DOS written to provide the most functionality in the least space Not divided into modules Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated Difficult to implement and maintain.,Layered Approach,The operating system is divid...
operating sytem《操作系统》ch02-operating-system structures-42.ppt,Solaris Modular Approach Mac OS X hybrid structure 2.8 Virtual Machines The fundamental idea behind a virtual machine is to abstract the hardware of a single computer into several differe
Outline •••••Operating-SystemServicesUserOperating-SystemInterfaceSystemCallsSystemProgramsOperating-SystemDesignandImplementation•Operating-SystemStructure•VirtualMachines Operating-SystemServices(1/3)•TheserviceswhichanOSissupposedtoprovidecanbecategorizedintotwoclasses –Theclassofservicesfortheusers...
ComputersystemoperationI/OstructureStoragestructureStoragehierarchyHardwareprotectionGeneralsystemarchitecture 第一页，共27页。COMPUTERSYSTEMOPERATION 第二页，共27页。ComputerSystemOperation TheCPUandI/Odevicescanexecuteconcurrently.CPUfetchesainstructionandexecutesit.movesdatafrom/tomainmemoryto/fromlocalbuffers.Each...
Direct Memory Access (DMA) Structure Used for high-speed I/O devices able to transmit informatin at close to memory speeds. Device controller transfers blocks of data from buffer storage directly to main memory without CPU intervention. Only on interrupt is generated per block, rather than the ...
OperatingSystemServicesUserOperatingSystemInterfaceSystemCallsTypesofSystemCallsSystemProgramsOperatingSystemDesignandImplementationOperatingSystemStructureVirtualMachinesOperatingSystemGenerationSystemBoot 2.3 2.1OperatingSystemServices Onesetofoperating-systemservicesprovidesfunctions...
1974, 2024 ix x CICS TS for z/OS: System Programming Reference Chapter 1. Introduction to system programming commands The CICS system programming interface (SPI) commands are for managing the CICS system and its resources, in contrast to the application programming interface (API) commands,...
SystemStructure(文件系统结构) Filestructure(文件结构) Logicalstorageunit(逻辑存储单元) Collectionofrelatedinformation(相关信息的集合) Filesystemresidesonsecondarystorage(disks).(文件系统存在于辅助存储器中—磁盘) Filesystemorganizedintolayers.(文件系统按层组织) Filecontrolblock–storagestructureconsistingof...
the Inside of Windows Trap dispatching Interrupt & exception Divert the processor to code outside the normal flow of control Trap: A processor's mechanism for 1.Capturing an executing thread when an exception or an interrupt occurs 2.Transferring control to a fixed location in the operating ...