nice和renice命令详解

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发布时间：2019-02-25

本文共 1324 字，大约阅读时间需要 4 分钟。

Linux?????nice??

?????Linux??????????????????????????????????????????????????????????????????????CPU????????????nice??????????????????????????

nice????

nice???????????????????????????????????nice??????????"nice"??niceness??????????????????????????????????????????????????????????????????

????

nice [OPTIONS] [COMMAND [ARG]...]

????????????niceness??10?

????????nice vi??vi???niceness??10?

????

-n, --adjustment=N
??niceness??N?N????-20?19?
???nice -n 10 vi?vi??????10?

?????????niceness?????10?
???nice vi??vi?????10?

????

??????

nice -20 some_command

some_command???????-20?????????

???????

nice some_command

some_command???????10?

????????

nice -c 5 some_command &
nice -c 10 other_command &

??-c?????????????????

???????

??ps -lF??????????????????

ps -lF

????PRI???????????NI??nice?????PRI??80???NI??????????????PRI + NI?

renice??

nice?????????????????renice?????????????????????

renice [OPTIONS] [?????...]

????

-p PID
??PID???????????

-u ???
???????????????

-g ??
????????????????

-5
??????-5????????

????

????PID?????

renice -5 1234

?PID?1234????????-5?

?????????????

renice -10 -u xie

???xie??????????-10?

???????????

renice -5 -g dev

???dev???????????-5?

????

??????niceness?????????????

???????niceness?????10?

?????niceness????-20?19?

??

??nice???renice?????????????????????????????????????????????????????????????

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