计算机 有 4 个 结构化 部件:(1)处理器(Processor)(2)内存(Main memory) (3)输入输出模块(I/O modules):在计算机 和 外部环境之间 移动数据。 (4)系统总线(System bus):在 处理器、内存 输入/输出模块 间 提供通信的设施。 内存地址寄存器(Memory Address Register,MAR):用于 确定下一次 读/写 的地址。
1、Chapter 8: Main Memory,Chapter Objectives,To provide a detailed description of various ways of organizing memory hardware To discuss various memory-management techniques, including paging and segmentation To provide a detailed description of the Intel Pentium, which supports both pure segmentation a ...
Chapter8:MainMemory ChapterObjectives ToprovideadetaileddescriptionofvariouswaysoforganizingmemoryhardwareTodiscussvariousmemory-managementtechniques,includingpagingandsegmentationToprovideadetaileddescriptionoftheIntelPentium,whichsupportsbothpuresegmentationandsegmentationwithpaging 8.2 ContentOverview BackgroundSwapping...
Chapter9:MainMemory OperatingSystemConcepts–10thEdition Silberschatz,GalvinandGagne©2018 Chapter9:MemoryManagement BackgroundContiguousMemoryAllocationPagingStructureofthePageTableSwappingExample:TheIntel32and64-bitArchitecturesExample:ARMv8Architecture OperatingSystemConcepts–10thEdition 9....
Chapter8:MainMemory ChapterObjectives Toprovideadetaileddescriptionofvariouswaysoforganizingmemoryhardware Todiscussvariousmemory-managementtechniques,includingpagingandsegmentation ToprovideadetaileddescriptionoftheIntelPentium,whichsupportsbothpuresegmentationandsegmentationwithpaging 8.2 ContentOverview Back...
实际金字塔:Registers、cache、Main memory、Magnetic disk、Magnetic tape(磁带) 硬盘(磁盘DISK)的速度远远慢于内存(内存条)的速度,差几个数量级,所以程序是在内存中执行。覆盖overlay:常用的数据代码放在内存,不常用的放在硬盘。交换swapping:没在跑的程序暂时放到硬盘去。计算机系统中,在多道程序运行的环境下可能会...
2. memory-mapped I/O 把硬件的寄存器映射到内存地址中,这样就能像访存写存一样操作设备。 To access a particular register, the OS issues a load (to read) or store (to write) the address; the hardware then routes the load/store to the device instead of main memory. ...
Operating Systems Principles Memory Management Lecture 8: Sharing of Code and Data in Main Memory
Protected areas of memory may be accessed Kernel(内核) Portion of operating system that is in main memory Contains most frequently used functions Also called the nucleus(核子) Ease of Evolution of an Operating System Serial Processing->Simple Batch Systems->Multiprogrammed Batch Systems->Time-Sharing...
Memory Management Storage Management Protection and Security KernelData Structures Computing Environments Open-Source Operating Systems 程序:指令集和 有序 完成某个任务 What is an Operating System? A program that acts as an intermediary between a user of a computer and the computer hardware ...