Operating Systems Intro

About the Presentations
• The presentations cover the objectives found in the opening of each chapter. • All chapter objectives are listed in the beginning of each presentation. • You may customize the presentations to fit your class needs. • Some figures from the chapters are included. A complete set of images from the book can be found on the Instructor Resources disc.

Principles of Operating Systems: Design & Applications
Chapter 1 Introduction to Operating Systems

Objectives
After studying this chapter, the student should:
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Be able to discuss ways of defining the operating system Understand the different roles the OS plays Have a general picture of the areas of OS responsibility Have a general understanding of the evolution of operating systems
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Principles of Operating Systems: Design & Applications

Objectives (continued)
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Understand some of the general trends in OS development Be able to describe the bootstrapping process Understand how system calls work

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Principles of Operating Systems: Design & Applications

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What is an Operating System?
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Everything in the distribution? Just the kernel? Our working definition: The kernel and any programs necessary to provide services to applications

Principles of Operating Systems: Design & Applications

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What is an Operating System? (continued)
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Manages the hardware resources among competing entities Provides common services to applications Interfaces applications to hardware

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Principles of Operating Systems: Design & Applications

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Resource Manager
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Allocates scarce resources Protects entities from interfering with each other Protects itself and the overall system from both malicious and accidental damage Programs run at the pleasure of the OS

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Principles of Operating Systems: Design & Applications

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Service Provider
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Provides common functionality, simplifying applications Provides standard