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lecture01-chapter01 - OperatingSystems COP4600 Lecture1...

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Operating Systems COP 4600 Lecture 1 Instructor: Anda Iamnitchi [email protected] 1
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2 What is an Operating System?
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The Role of an OS Exploit the hardware resources of one or more processors Provides a set of services to system users Manages secondary memory and I/O devices 3
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4 This Course Bus Processes, threads, scheduling Memory management I/O Management File Systems Monitor
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5 Why care about OS? (1) You, the CS major Most critical software in a computer. OS performance influences the performance of all software on a computer How to extract the best performance out of an OS? How to work around design flaws? Write software that takes advantage of the design of the OS
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6 Why care about OS? (2) You, the informed computer user You need to understand enough to make informed decisions about things like buying and using a personal computer Why do different platforms with the same CPU perform differently? Should I get Windows XP? Windows Vista? Linux? Mac? What’s the difference? Should I upgrade my hardware? Should I upgrade my OS? What’s going on with my PC, especially when I have to install something? Should I use disk compression? Is there a cost to using it?
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7 Why care about OS? (3) You, the good programmer If you’re going to be a software engineer then
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