June 2012
Intermediate to advanced
528 pages
15h 40m
English
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6.12 Summary
The process abstraction is forced on us by the need to satisfy complex timing requirements, particularly for multirate systems. Writing a single program that simultaneously satisfies deadlines at multiple rates is too difficult because the control structure of the program becomes unintelligible. The process encapsulates the state of a computation, allowing us to easily switch among different computations.
The operating system encapsulates the complex control to coordinate the process. The scheme used to determine the transfer of control among processes is known as a scheduling policy. A good scheduling policy is useful across many different applications while also providing efficient utilization of the available CPU cycles.
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