linux 如何改变进程优先级

语法

chrt -p -f  PID 99

 

参考资料

~ # chrt
BusyBox v1.31.1 (2022-11-29 11:19:09 CST) multi-call binary.

Usage: chrt -m | -p [PRIO] PID | [-rfobi] PRIO PROG [ARGS]

Change scheduling priority and class for a process

-m Show min/max priorities
-p Operate on PID
-r Set SCHED_RR class
-f Set SCHED_FIFO class
-o Set SCHED_OTHER class
-b Set SCHED_BATCH class
-i Set SCHED_IDLE class

 

~ # chrt -m
SCHED_OTHER min/max priority : 0/0
SCHED_FIFO min/max priority : 1/99
SCHED_RR min/max priority : 1/99
SCHED_BATCH min/max priority : 0/0
SCHED_IDLE min/max priority : 0/0

 

cpu调度算法详解：这个写的很好。

SCHED_FIFO与SCHED_OTHER调度机制 - AlexAlex - 博客园 (cnblogs.com)

Linux调度策略与 进程优先级 - schips - 博客园 (cnblogs.com)