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Understanding Operating Systems Flynn & McHoes

Understanding Operating Systems Flynn & McHoes. Part I: Operating Systems Theory Overview Memory Management, Early Systems Memory Management, Recent Systems Processor Management Process Management Concurrent Processes Device Management File Management Network Organization Concepts

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Understanding Operating Systems Flynn & McHoes

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  1. Understanding Operating SystemsFlynn & McHoes Part I:Operating Systems Theory • Overview • Memory Management, Early Systems • Memory Management, Recent Systems • Processor Management • Process Management • Concurrent Processes • Device Management • File Management • Network Organization Concepts • Management of Network Functions • System Management

  2. Understanding Operating Systems Part II: Operating Systems in Practice • MS-DOS Operating System • Windows 2000 • UNIX/Linux Operating System • OpenVMS Alpha Operating System • IBM OS/390 Operating System Understanding Operating Systems

  3. Software Components Developed Hardware Components Developed Operating Systems Developed Chapter 1: Overview • Introduction • Operating System Components • Machine Hardware • Types of Operating Systems • Brief History of Operating Systems Development • Conclusion Understanding Operating Systems

  4. Components of an Operating System Operating system – part of the computing system that manages all of the hardware and all of the software • Controls every file, device, section of main memory & every nanosecond of processing time • Memory manager • Processor manager • Device manager • File manager Operating system consists of Understanding Operating Systems

  5. Subsystems Must Work With Each Other

  6. Tasks Performed by Each Subsystem • Monitor its resources continuously • Enforce the policies that determine who gets what, when and how much • Allocate the resource when appropriate • Deallocate the resource (reclaim it) when appropriate Understanding Operating Systems

  7. Machine Hardware • Memory chips • Input/output devices (monitor, keyboard, printer) • Storage devices (disks, magnetic tape, card readers, drums) • Central Processing Unit (Arithmetic Logic Unit, registers, internal control, bus control) Understanding Operating Systems

  8. Types of Operating Systems • Batch (simple and multi-programmed) • Interactive (time-sharing) • Real-time systems • Hybrid systems (combination of batch and interactive) • Parallel (tightly coupled) • Distributed (loosely coupled) Understanding Operating Systems

  9. Brief History of Operating Systems Development Recent Developments Distributed computing, personal computers, high-speed communication, multi-media Second Generation Job scheduling, JCL, faster I/O, spooling, batch, files 1940 1955 1965 1980 1990 First Generation Vacuum tube, single user, early operating systems Third Generation Shared processing, multiprogramming, virtual memory, DBMS Understanding Operating Systems

  10. batch system central processing unit device manager file manager firmware hardware hybrid system interactive system main memory mainframe memory manager microcomputer minicomputer multiprocessing networking operating system processor manager real-time system software supercomputer workstation Key Terms Understanding Operating Systems

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