Chapter01-OS7e - Operating Systems Internals andDesign...

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n Seventh Edition n By William Stallings Operating  Systems: Internals  and Design  Principles
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Operating Systems: Internals and Design Principles “No artifact designed by man is so convenient for this kind of functional description as a digital computer. Almost the only ones of its properties that are detectable in its behavior are the organizational properties. Almost no interesting statement that one can make about an operating computer bears any particular relation to the specific nature of the hardware. A computer is an organization of elementary functional components in which, to a high approximation, only the function performed by those components is relevant to the behavior of the whole system.” THE SCIENCES OF THE ARTIFICIAL , Herbert Simon
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Operating System n Exploits the hardware resources of one or more  processors to provide a set of services to system  users n Manages secondary memory and I/O devices
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     Basic Elements
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Processor
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Main Memory n Volatile n Contents of the memory is lost  when the computer is shut  down n Referred to as real memory or  primary memory
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I/O Modules
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           System Bus n Provides for communication  among processors, main  memory, and I/O modules
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Top-Level  View
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      Microprocessor n Invention that brought about  desktop and handheld computing n Processor on a single chip n Fastest general purpose processor n Multiprocessors
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Graphical Processing  Units (GPUs) n Provide efficient computation on arrays of  data using Single-Instruction Multiple Data  (SIMD) techniques n Used for general numerical processing n Physics simulations for games n Computations on large spreadsheets G P U
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(DSPs) n Deal with streaming signals such as audio  or video n Used to be embedded in devices like 
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Chapter01-OS7e - Operating Systems Internals andDesign...

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