UCLAMPSET(1)           <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>

<?><?><?><?><?>
       uclampset - <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?>

<?><?><?><?><?><?><?><?> <?><?><?><?>
       uclampset [<?><?><?><?><?><?><?><?>] [-m uclamp_min] [-M uclamp_max]
       _<?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>

       uclampset [<?><?><?><?><?><?><?><?><?>] [-m uclamp_min] [-M uclamp_max]
       -p PID

<?><?><?><?>
       uclampset <?><?><?><?><?><?><?><?><?><?> <?><?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> PID <?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?>.

       Utilization clamping is a new feature added in v5.3. It gives a hint to
       the scheduler about the allowed range of utilization the task should be
       operating at.

       The utilization of the task affects frequency selection and task
       placement. Only schedutil cpufreq governor understands handling util
       clamp hints at the time of writing. Consult your kernel docs for
       further info about other cpufreq governors support.

       If you're running on asymmetric heterogeneous system like Arm's
       big.LITTLE. Utilization clamping can help bias task placement. If the
       task is boosted such that util_min value is higher than the little
       cores' capacity, then the scheduler will do its best to place it on a
       big core.

       Similarly, if util_max is smaller than or equal the capacity of the
       little cores, then the scheduler can still choose to place it there
       even if the actual utilization of the task is at max.

       Setting a task's uclamp_min to a none zero value will effectively boost
       the task as when it runs it'll always start from this utilization
       value.

       By setting a task's uclamp_max below 1024, this will effectively cap
       the task as when it runs it'll never be able to go above this
       utilization value.

       The full utilization range is: [0:1024]. The special value -1 is used
       to reset to system's default.

       Consult latest kernel documentation for more details:

           https://kernel.org/doc/html/latest/scheduler/sched-util-clamp.html

<?><?><?><?><?><?><?><?><?>
       -m
           <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> util_min.

       -M
           <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> util_max.

       -a, --all-tasks
           <?><?><?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?>
           <?><?><?><?><?><?><?> (<?><?><?><?><?><?><?> <?><?><?><?><?><?><?>)
           <?><?><?> <?><?><?><?><?><?><?><?><?> PID.

       -p, --pid
           <?><?><?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?> PID <?>
           <?><?> <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?>.

       -s, --system
           <?><?><?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?>.

       -R, --reset-on-fork
           <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
           SCHED_FLAG_RESET_ON_FORK.

       -v, --verbose
           <?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?> <?><?><?><?><?>.

       -h, --help
           <?><?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?><?><?><?> <?>
           <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>.

       -V, --version
           <?><?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?>
           <?><?><?><?><?><?> <?> <?><?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?>.

<?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?> <?>
       <?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?><?><?><?>:
           uclampset [-m uclamp_min] [-M uclamp_max] <?><?><?><?><?><?><?>
           [<?><?><?><?><?><?><?><?><?>]

       <?><?> <?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?>:
           uclampset -p PID

       <?><?><?> <?><?><?><?><?><?><?><?><?><?> <?><?>:
           uclampset -p PID [-m uclamp_min] [-M uclamp_max]

       <?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?>:
           uclampset -s [-m uclamp_min] [-M uclamp_max]

<?><?><?><?><?> <?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?><?>
       CAP_SYS_NICE <?><?><?> <?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>.
       <?><?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?>
       <?><?><?><?>-<?><?><?><?> <?><?><?><?><?><?><?><?><?><?>.

<?><?><?><?><?><?><?><?><?><?>
       The system wide utilization clamp attributes are there to control the
       allowed range the tasks can use. By default both uclamp_min and
       uclamp_max are set to 1024. This means users can set the utilization
       clamp values for their task across the full range [0:1024].

       <?><?><?><?><?><?><?>:
           uclampset -s -m 512 -M 700

       will prevent any task from being boosted higher than 512. And all tasks
       in the systems are capped to a utilization of 700. Effectively
       rendering the maximum performance of the system to 700.

       <?><?><?><?><?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?><?>
       <?><?><?><?>, <?><?><?> <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
       <?><?><?> <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
       <?><?><?><?>.

<?><?><?><?><?><?>
       Qais Yousef <qyousef@layalina.io>

<?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>
       nice(1), renice(1), taskset(1), sched(7)

       <?><?><?>. <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?> sched_setscheduler(2) <?><?> sched_setattr(2), <?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?>
       <?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?> <?> Linux.

<?><?> <?><?><?><?><?><?><?><?><?> <?><?><?><?> <?><?><?> <?><?><?><?>
       <?><?><?> <?><?><?><?><?><?><?><?><?><?> <?><?><?><?> <?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?>
       <https://github.com/util-linux/util-linux/issues>

<?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> uclampset <?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> util-linux, <?><?><?><?> <?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?> <?><?><?><?><?><?> <?><?><?><?> Linux
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.41                   2025-03-29                      UCLAMPSET(1)