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OPERATING SYSTEMS OVERVIEW - WPI

1: OPERATING SYSTEMS Overview1 Jerry BreecherOPERATING SYSTEMS OVERVIEW1: OPERATING SYSTEMS Overview2 WHAT IS AN OPERATING system ? An interface between users and hardware - an environment "architecture Allows convenient usage; hides the tedious stuff Allows efficient usage; parallel activity, avoids wasted cycles Provides information protection Gives each user a slice of the resources Acts as a control system OVERVIEW1: OPERATING SYSTEMS Overview3 OPERATING system OVERVIEWThe Layers Of A SystemProgram InterfaceHumansUser Interface/ Privileged InstructionsDisk/Tape/Memory1: OPERATING SYSTEMS Overview4A mechanism for scheduling jobs or processes.

1: Operating Systems Overview 13 Caching: •Important principle, performed at many levels in a computer (in hardware, operating system, software) •Information in use copied from slower to faster storage temporarily •Faster storage (cache) checked first to determine if …

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OPERATING SYSTEMS MEMORY MANAGEMENT - WPI

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