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Mar 8, 2024
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Supplement content on process priority #1894

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Supplement content on process priority
jimcat8 Mar 6, 2024
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Update docs/books/admin_guide/08-process.md
sspencerwire Mar 6, 2024
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6 changes: 4 additions & 2 deletions docs/books/admin_guide/08-process.md
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Expand Up @@ -165,9 +165,11 @@ When a parent process dies, their children are said to be orphans. They are then

### The priority of a process

The processor works in time sharing, with each process occupying a quantity of processor time.
GNU/Linux belongs to the family of time-sharing operating systems. Processors work in a time-sharing manner, and each process takes up some processor time. Processes are classified by priority:

The processes are classified by priority, whose value varies from **-20** (the highest priority) to **+19** (the lowest priority).
* Real-time process: the process with priority of **0-99** is scheduled by real-time scheduling algorithm.
* Ordinary processes: processes with dynamic priorities of **100-139** are scheduled using a fully fair scheduling algorithm.
* Nice value: a parameter used to adjust the priority of an ordinary process. The range is **-20-19**.

The default priority of a process is **0**.

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