chrt

cup 调度

[root@dotohi ~]# 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).

[root@dotohi ~]# chrt -r --max
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
SCHED_DEADLINE min/max priority	: 0/0