2.1.2 The Operating System as Resource Manager(3/3) Kerne(内核) Portion of operating system that is in main memory Contains most frequently used functions Also called the nucleus(核子)
2.1.2 The Operating System as Resource Manager (3/3) • Kernel(内核) • Portion of operating system that is in main memory • Contains most frequently used functions • Also called the nucleus（核子） 12
2.1 Operating System objectives and Functions 2.1.0 Introduction .2 1.1 The Operating System as a User/computer Interface 2. 1.2 The Operating System as Resource Manager .2.1 3 Ease of Evolution of an operating system
2.1 Operating System Objectives and Functions • 2.1.0 Introduction • 2.1.1 The Operating System as a User/Computer Interface • 2.1.2 The Operating System as Resource Manager • 2.1.3 Ease of Evolution of an Operating System 13
2.1.3 Ease of Evolution of an Operating ystem(1/1 Why? New types of hardware New services Fixes Bug How? Modularization OS Architecture [for more detail later on 2.3.5]
2.1.3 Ease of Evolution of an Operating System (1/1) • Why ? • New types of hardware • New services • Fixes Bug • How ? • Modularization • OS Architecture [for more detail later on 2.3.5 ] 14
Chapterol operating system overview 2.1 Operating System Objectives and Functions .2 2 The Evolution of operating Systems 2.3 Major achievements 2. 4 Developments leading to modern Operating Systems
Chapter01 Operating System Overview • 2.1 Operating System Objectives and Functions • 2.2 The Evolution of Operating Systems • 2.3 Major Achievements • 2.4 Developments Leading to Modern Operating Systems 15
2.2 The Evolution of Operating Systems Time Sharing Multiprogrammed Systems Batch Systems Simple Batch Systems Serial Processing
2.2 The Evolution of Operating Systems Serial Processing Simple Batch Systems Multiprogrammed Batch Systems Time Sharing Systems 16