Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core

[A L]

---- From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> -- Sent: 2020-10-22 - 14:29 ----

> On Thu, Oct 22, 2020 at 02:19:29PM +0200, Rafael J. Wysocki wrote:
>> > However I do want to retire ondemand, conservative and also very much
>> > intel_pstate/active mode.
>> 
>> I agree in general, but IMO it would not be prudent to do that without making
>> schedutil provide the same level of performance in all of the relevant use
>> cases.
> 
> Agreed; I though to have understood we were there already.

Hi, 


Currently schedutil does not populate all stats like ondemand does, which can be a problem for some monitoring software. 

On my AMD 3000G CPU with kernel-5.9.1:


grep. /sys/devices/system/cpu/cpufreq/policy0/stats/*

With ondemand:
time_in_state:3900000 145179
time_in_state:1600000 9588482
total_trans:177565
trans_table:   From  :    To
trans_table:         :   3900000   1600000
trans_table:  3900000:         0     88783
trans_table:  1600000:     88782         0

With schedutil only two file exists:
reset:<empty>
total_trans:216609 


I'd really like to have these stats populated with schedutil, if that's possible.

Thanks.