OS ch1.ppt - Chapter 1 Introduction Operating System...

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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 What Operating Systems Do Computer-System Organization Computer-System Architecture Operating-System Structure Operating-System Operations Process Management Memory Management Storage Management Protection and Security Kernel Data Structures Computing Environments Open-Source Operating Systems
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1.3 Silberschatz, Galvin and Gagne  © 2013 Operating System Concepts – 9 th  Edition Objectives To describe the basic organization of computer systems To provide an understanding of the major components of  operating systems To give an overview of the many types of computing  environments 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? A program that acts as an intermediary between a user of a  computer and the computer hardware Operating system goals: Execute user programs and make solving user problems  easier Make the computer system convenient to use 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 What Operating Systems Do Depends on the point of view Users want convenience,  ease   of   use  and  good performance  Don’t care about  resource   utilization But shared computer such as  mainframe  or  minicomputer  must  keep all users happy Handheld computers are resource poor,  optimized for usability  and battery life Some computers have little or no user interface, such as  embedded computers in devices and automobiles
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1.6 Silberschatz, Galvin and Gagne  © 2013 Operating System Concepts – 9 th  Edition Operating System Definition OS is a  resource allocator Manages all resources Decides between conflicting requests for efficient and  fair resource use OS is a  control program Controls execution of programs to prevent errors and  improper use of the computer
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1.7 Silberschatz, Galvin and Gagne  © 2013 Operating System Concepts – 9 th  Edition Computer Startup bootstrap program   is loaded at power-up or reboot Typically stored in ROM or EPROM, generally known  as  firmware Initializes all aspects of system Loads operating system kernel and starts execution Assignment#01 How to make yours own usb /CD  bootable? 16-SE- 06, 02, 04, 08, 10 only omega
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1.8 Silberschatz, Galvin and Gagne  © 2013 Operating System Concepts – 9 th  Edition
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  • Spring '17
  • Nadeem Majeed
  • Gagne, Galvin, Silberschatz,  Computer

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