On 2024/06/17 22:11, Renato Aguiar wrote:
> 
> On Sat, Jun 15 2024, Kirill A. Korinsky wrote:
> 
> >
> > This work is based on Solene's patch, which she announced at
> > https://marc.info/?l=openbsd-tech&m=163259444331471&w=2 , which she
> > benchmarked, and the results of which she published on her blog
> > https://dataswamp.org/~solene/2021-09-26-openbsd-power-usage.html .
> >
> > With two changes:
> >
> > 1. Unused CPU cores are halted and moved to deepest C-state to save some
> >    power.
> > 2. It uses powersavelimit settings instead of 100 as active CPU performance.
> >
> 
> I think a patch to just disable specific cpu cores from userspace,
> e.g. via sysctl, is more likely to be accepted.

Is that really a good thing to make available to userland?

> If there were such
> mechanism, you could implement your power saving policy in userspace,
> like obsdfreqd does.

ugh