To be fair, I should have checked this in src for current and not 7.6.
I've been doing a bit of testing over the weekend and forgot to switch
back to current. hw.perfpolicy=auto works great now, cpu temp runs
around 7-12C cooler for my setup while on AC. Enough to keep the fan
at 0 RPM most of the time (except video calls in G-Meet...).
Thanks,
PT
On Mon, Mar 17, 2025 at 11:31 PM Jeremie Courreges-Anglas
<j...@wxcvbn.org> wrote:
>
> On Mon, Mar 17, 2025 at 01:21:43PM -0500, Brian Conway wrote:
> > On Mon, Mar 17, 2025, at 1:16 PM, Peter Toth wrote:
> > > Hi all,
> > >
> > > There used to be a -C switch for apm/apmd for "cool" mode, where the
> > > automatic performance adjustment mode would throttle down CPU
> > > frequency regardless of AC power status.
>
> Actually -C has been an alias for -A ("auto") since some years
> already. But "auto" slightly changed its meaning back in 2021,
>
> > > Currently auto mode goes to highest frequency (+turbo) while on AC
> > > power, this is good when connected to mains at room temperature, but
> > > not so great in hotter climates and/or while connected to a power
> > > bank.
> > >
> > > Is there any appetite to perhaps introduce a new hw.perfpolicy=battery
> > > or similar to retain the same mode as auto with no AC power?
> > >
> > > Looking at sys/kern/sched_bsd.c this should be a fairly trivial change.
> > >
> > > Any thoughts?
> > >
> > > Thanks,
> > > PT
> >
> > The following is in -current, does it help you or have I misread your
> > intention?
> >
> > https://github.com/openbsd/src/commit/cc51e07cb96c0af80015d0d86e1e7f01cbaab662
>
> This should indeed solve Peter's concern. Either using apmd -A which
> will force "auto" mode even on AC power, by directly using sysctl
> hw.perfpolicy=auto.
>
> This reminds me that the documentation of apm(8)/apmd(8) is lacking in
> this regard, something I'd like to fix before the next release.
>
> --
> jca
>
