Process management (computing): Difference between revisions

Revision as of 09:02, 20 March 2025

Revision as of 20:10, 3 April 2025

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A [[multiprogramming]] or [[Computer multitasking|multitasking]] OS is a system that can execute many processes concurrently. Multiprogramming requires that the processor be allocated to each process for a period of time and de-allocated or issued at an appropriate moment. If the processor is de-allocated during the execution of a process, it must be done in a way that the process can restart later as efficiently as possible.

There are two ways for an OS towa regain control of the processor during a program's execution in order for the OS to perform de-allocation or allocation:

# The process issues a [[system call]] (sometimes called a ''software [[interrupt]]''); for example, an I/O request occurs requesting to access a file on a hard disk.