lecture2

lecture2 - Lecture 2 Operating Systems Basics and Structure...

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Lecture2:Operating Systems Basics and Structure Memory Memory stores programs and data while there’ spower .It’ salinear array that maps addresses to words of data. Attributes of memory include the size of the smallest and largest addressible units of data. Memory is part of the storage heirarchy. CPU Registers CPU Cache Main Memory Disk Tape Faster CPU access Cheaper cost/byte Peripherals and Busses Peripherals are the fun parts of the system that interact with humans: monitors, disk drives, tape drives, CDROM readers/writers, network interfaces. Theyare frequently have associated controllers. Peripherals are connected to the CPU/memory by busses (usually). Busses provide an interconnec- tion network with a certain bandwidth (number of bytes/sec that can be transferred) and latency(time to transfer one byte). Resources Collectively ,these are the resources that an operating sytem manages. It must allocate space and time on these devices, including the CPU and memory ,for the computer to do useful things for people. The layout of the course will largely followthese resources from the CPU out to the peripherals.
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This note was uploaded on 02/28/2008 for the course CS 402 taught by Professor Tedfaber during the Spring '05 term at USC.

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lecture2 - Lecture 2 Operating Systems Basics and Structure...

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