ch01.pdf - Chapter 1 Introduction Operating System Concepts \u2013 9th Edit9on Silberschatz Galvin and Gagne \u00a92013 Chapter 1 Introduction \u0001 What Operating

ch01.pdf - Chapter 1 Introduction Operating System Concepts...

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Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edit9on Chapter 1: Introduction
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1.2 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition Chapter 1: Introduction square6 What Operating Systems Do square6 Computer-System Organization square6 Computer-System Architecture square6 Operating-System Structure square6 Operating-System Operations square6 Process Management square6 Memory Management square6 Storage Management square6 Protection and Security square6 Kernel Data Structures square6 Computing Environments square6 Open-Source Operating Systems
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1.3 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition Objectives square6 To describe the basic organization of computer systems square6 To provide a grand tour of the major components of operating systems square6 To give an overview of the many types of computing environments square6 To explore several open-source operating systems
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1.4 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition What is an Operating System? square6 A program that acts as an intermediary between a user of a computer and the computer hardware square6 Operating system goals: circle6 Execute user programs and make solving user problems easier circle6 Make the computer system convenient to use circle6 Use the computer hardware in an efficient manner
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1.5 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition Computer System Structure square6 Computer system can be divided into four components: circle6 Hardware –provides basic computing resources UIforward CPU, memory, I/O devices circle6 Operating system UIforward Controls and coordinates use of hardware among various applications and users circle6 Application programs –define the ways in which the system resources are used to solve the computing problems of the users UIforward Word processors, compilers, web browsers, database systems, video games circle6 Users UIforward People, machines, other computers
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1.6 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition Four Components of a Computer System
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1.7 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition What Operating Systems Do square6 Depends on the point of view square6 Users want convenience, easeofuse circle6 Don t care about resourceutilization square6 But shared computer such as mainframe or minicomputer must keep all users happy square6 Users of dedicate systems such as workstations have dedicated resources but frequently use shared resources from servers square6 Handheld computers are resource poor, optimized for usability and battery life square6 Some computers have little or no user interface, such as embedded computers in devices and automobiles
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1.8 Silberschatz, Galvin and Gagne ©2013 Operating System Concepts –9 th Edition Operating System Definition square6 OS is a resource allocator circle6 Manages all resources circle6
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