August 2004
Intermediate to advanced
720 pages
23h 44m
English
book
Design and Implementation of the FreeBSD Operating System, The
by Marshall Kirk McKusick, George V. Neville-Neil
Content preview from Design and Implementation of the FreeBSD Operating System, The
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Chapter 4. Process Management
4.1 Introduction to Process Management
A process is a program in execution. A process must have system resources, such as memory and the underlying CPU. The kernel supports the illusion of concurrent execution of multiple processes by scheduling system resources among the set of processes that are ready to execute. On a multiprocessor, multiple processes may really execute concurrently. This chapter describes the composition of a process, the method that the system uses to switch between processes, and the scheduling policy that it uses to promote sharing of the CPU. It also introduces process creation and termination, and details the signal facilities and process-debugging facilities.
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