2 Main Memory Management(存储管理里) o Main Memory,MM: a large array of words or bytes,each with its own address A repository of quickly accessible data shared by CPU and I/O devices A volatile storage device Maybe the most architecture-specified component of OS o Activities Keeping track of memory usage Deciding which processes to load Allocating and deallocating memory space 口18走卡1，月00 陈香兰xlanchen@ustc.edu.cn http:/staf仟.u011740i:Operating System操作系统原理 March28,20197/73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Main Memory Management(存储管理) Main Memory, MM: ▶ a large array of words or bytes, each with its own address ▶ A repository of quickly accessible data shared by CPU and I/O devices ▶ A volatile storage device ▶ Maybe the most architecture-specified component of OS Activities 1 Keeping track of memory usage 2 Deciding which processes to load 3 Allocating and deallocating memory space 陈香兰 xlanchen@ustc.edu.cn http://staff.ustc.edu.cn/~xlanchen (Computer Application Laboratory, CS, USTC @ Hefei Embedded System Laboratory, CS, USTC @ Suzhou) 0117401: Operating System 操作系统原理与设计 March 28, 2019 7 / 73