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

[Qais Yousef]

On 10/27/20 11:26, Valentin Schneider wrote:
> 
> On 27/10/20 11:11, Qais Yousef wrote:
> > On 10/22/20 14:02, Peter Zijlstra wrote:
> >> However I do want to retire ondemand, conservative and also very much
> >> intel_pstate/active mode. I also have very little sympathy for
> >> userspace.
> >
> > Userspace is useful for testing and sanity checking. Not sure if people use it
> > to measure voltage/current at each frequency to generate
> > dynamic-power-coefficient for their platform. Lukasz, Dietmar?
> >
> 
> It's valuable even just for cpufreq sanity checking - we have that test
> that goes through increasing frequencies and asserts the work done is
> monotonically increasing. This has been quite useful in the past to detect
> broken bits.
> 
> That *should* still be totally doable with any other governor by using the
> scaling_{min, max}_freq sysfs interface.

True. This effectively makes every governor a potential user space governor.

/me not sure to be happy or grumpy about it

Thanks

--
Qais Yousef