[RFC/RFT][PATCH v1 0/2] cpuidle: teo: Do not check timers unconditionally every time

From: Rafael J. Wysocki
Date: Tue Aug 01 2023 - 15:41:21 EST

Hi Folks,

This is on top of the fixes series posted previously:


(I'll put it all into one git branch tomorrow).

I started to play with the idea described here


and this is the result.

Note that this is completely experimental, even though it doesn't kill any of
the test boxes I've run it on.

Patch [1/2] moves the tick_nohz_get_sleep_length() call in teo_select() after
a preliminary idle state selection based on statistics and patch [2/2] adds
checks to avoid it completely if the idle state selected so far is shallow

I would appreciate checking if this actually makes any difference.