Process Management

Abstract

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• Required in an OS that has multiple Process (进程) that want to run at the same, like in the Multi-programming or Multi-tasking systems. Because Process (进程) unlike Thread will give up its CPU for other Process (进程)

Components

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Process Priority

• A value that determines which Process (进程) should get executed first

Process Scheduler

• A program that perform Context Switch of Process (进程) based on the Process Priority
• Linux uses CFS

Terminologies

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Niceness

• An parameter that can be used to adjust the Process Priority for the Process Scheduler

Linux

• -20 is most not nice
• 19 is most nice
• Command to adjust niceness - renice