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Chapter 7
Operating
Systems
©Brooks/Cole, 2003
OBJECTIVES
After reading this chapter, the reader should
be able to:
Define the purpose and functions of an operating system.
Understand the components of an operating system.
Understand the concept of virtual memory.
Understand the concept of deadlock and starvation.
List some of the characteristics of popular operating systems
such as Windows 2000, UNIX, and Linux.
©Brooks/Cole, 2003
Figure 7-1
Computer System
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7.1
DEFINITION
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Note:
An operating system is an interface
between the hardware of a computer
and
the user (program or human) that
facilitates the execution of the other
programs and the access to
hardware and software resources.
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7.2
EVOLUTION
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7.3
COMPONENTS
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Figure 7-2
Components of an operating system
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Figure 7-3
Monoprogramming
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Figure 7-4
Multiprogramming
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Figure 7-5
Categories of multiprogramming
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Figure 7-6
Partitioning
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Figure 7-7
Paging
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Figure 7-8
Virtual memory
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Figure 7-9
State diagram with the boundaries
between a program, a job, and a process
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Figure 7-10
Job scheduler
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Figure 7-11
Process scheduler
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Figure 7-12
Queues for process management
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Figure 7-13
Deadlock
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Figure 7-14
Deadlock on a bridge
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Note:
Deadlock occurs when the
operating
system does not put resource
restrictions
on processes.
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Figure 7-15.a
Starvation
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Figure 7-15.b
Starvation
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Figure 7-15.c
Starvation
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