Re: [PATCH v2 1/2] sched/fair: Fix task utilization accountability in compute_energy()

[Quentin Perret]

On Thursday 25 Feb 2021 at 12:45:06 (+0100), Dietmar Eggemann wrote:
> I.e. since _task_util_est is always >= task_util during wakeup, cpu_util
> must be > cpu_util_est (by more than _task_util_est - task_util).
> 
> I can see it for a CPU whose cpu_util has a fair amount of contributions
> from blocked tasks which cpu_util_est wouldn't have.

Yes I think this can manifest itself if there are tasks changing
behaviour, or on an idle CPU as its ue.enqueued will be 0 and we'll be
left with blocked util only.

Thanks,
Quentin