可以使用chrt命令设置进程的调度策略和优先级。以下命令将11528进程的调度策略设置为RR，调度优先级设置为20:
chrt -r --pid 20 11528
具体使用见其help信息，如下:
ighthouse@cpp_template$ chrt --help
Show or change the real-time scheduling attributes of a process.
Set policy:
chrt [options] <priority> <command> [<arg>...]
chrt [options] --pid <priority> <pid>
Get policy:
chrt [options] -p <pid>
Policy options:
-b, --batch set policy to SCHED_BATCH
-d, --deadline set policy to SCHED_DEADLINE
-f, --fifo set policy to SCHED_FIFO
-i, --idle set policy to SCHED_IDLE
-o, --other set policy to SCHED_OTHER
-r, --rr set policy to SCHED_RR (default)
Scheduling options:
-R, --reset-on-fork set SCHED_RESET_ON_FORK for FIFO or RR
-T, --sched-runtime <ns> runtime parameter for DEADLINE
-P, --sched-period <ns> period parameter for DEADLINE
-D, --sched-deadline <ns> deadline parameter for DEADLINE
Other options:
-a, --all-tasks operate on all the tasks (threads) for a given pid
-m, --max show min and max valid priorities
-p, --pid operate on existing given pid
-v, --verbose display status information
-h, --help display this help
-V, --version display version
For more details see chrt(1).
