Question about "Make sched entity usage tracking scale-invariant"

[Chao Xie]

hi
I saw the patch “sched: Make sched entity usage tracking scale-invariant” that 
will make the usage to be freq scaled.
So if delta period that the calculation of usage based on cross a frequency 
change, so how can you make sure the usage calculation is correct?
The delta period may last hundreds of microseconds, and frequency change window 
may be 10-20 microseconds, so many frequency change can happen during the delta 
period.
It seems the patch does not consider about it, and it just pick up the current 
one.
So how can you resolve this issue?

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