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CONFIG_UCLAMP_TASK_GROUP: Utilization clamping per group of tasks

General informations

The Linux kernel configuration item CONFIG_UCLAMP_TASK_GROUP:

Help text

This feature enables the scheduler to track the clamped utilization of each CPU based on RUNNABLE tasks currently scheduled on that CPU.

When this option is enabled, the user can specify a min and max CPU bandwidth which is allowed for each single task in a group. The max bandwidth allows to clamp the maximum frequency a task can use, while the min bandwidth allows to define a minimum frequency a task will always use.

When task group based utilization clamping is enabled, an eventually specified task-specific clamp value is constrained by the cgroup specified clamp value. Both minimum and maximum task clamping cannot be bigger than the corresponding clamping defined at task group level.

If in doubt, say N.



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