Lecture9n - Click to edit Master subtitle style 8/1/11...

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Unformatted text preview: Click to edit Master subtitle style 8/1/11 Lecture 9 COT 4600 Operating Systems Spring 2011 Dan C. Marinescu Office: HEC 304 Office hours: Tu-Th 5:00 6:00 PM Lecture 9 8/1/11 n Last time: n Binding and indirection n Generic naming model Name mapping algorithms Comparing names; name discovery n Practical design of naming scheme Contexts Name overloading n Today: n Computer system organization; operating systems n The hardware layer Bus sharing Optimization, DMA n The software layer the file abstraction n Case studies UNIX File System URLs n Next time Modularity Lecture 9 Thursday, February 10, 2011 Lecture 9 22 Lecture 9 8/1/11 Computer System Organization n Operating Systems (OS) & software used to Control the allocation of resources (hardware and software) Support user applications Sandwiched between the hardware layer and the application layer n OS-bypass: the OS does not hide completely the hardware from applications. It only hides dangerous functions such as I/O operations Management function n Names & modularization Lecture 9 33 Lecture 9 8/1/11 Lecture 9 Figure 2.16 from the textbook 44 Lecture 9 8/1/11 The hardware layer n Modules representing each of the three abstractions (memory, interpreter, communication link) are interconnected by a bus. n The bus 7 a broadcast communication channel, each module hears every transmission....
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This note was uploaded on 07/30/2011 for the course COP 4600 taught by Professor Montagne during the Spring '08 term at University of Central Florida.

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Lecture9n - Click to edit Master subtitle style 8/1/11...

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