marcan changed the topic of #asahi to: Asahi Linux: porting Linux to Apple Silicon macs | "Does XXX work yet?": https://alx.sh/fs | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Topics: #asahi-dev #asahi-re #asahi-gpu #asahi-alt #asahi-stream #asahi-offtopic | Keep things on topic | Logs: https://alx.sh/l/asahi
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<cy8aer>
Sorry to ask: I am just playing around with the actual available governors. I set schedutil but found that there is a ladder and a menu governor with apple_idle. What effect do these governors have and which should I select for power saving? Or do I have some misinterpretation?
<nicolas17>
I don't think there's much to gain by changing governors away from the default
<cy8aer>
@nicolas17 and that is menu I guess? I am asking because I set the governors months ago before @marcans big patch and I guess my system is running "out of order" because of that.
<nicolas17>
how did you change it?
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<cy8aer>
just echoed schedutil to "/sys/devices/system/cpu/cpuidle/current_governor" and sometimes using cpupower tool (which did the same I guess)
<nicolas17>
that shouldn't survive reboots :)
<cy8aer>
But doing this there is no error reaction though "ladder" and "menu" are really available
<cy8aer>
(yes set in "rc.local")
<j`ey>
schedutil is for cpufreq
<j`ey>
not cpuidle
<cy8aer>
hm, ok, looks that I mixed it up. But you say: do not do anything with cpuidle and cpufreq and everything is fine?
<chadmed>
cy8aer: menu and ladder do nothing but choose which pstate to put the cpu in during idle, and when to do it
<chadmed>
schedutil uses data from the scheduler to determine which pstate to put the cpu into while its active
<mps>
cy8aer: I use conservative for /sys/devices/system/cpu/cpufreq/policyX/scaling_governor
<mps>
but I'm not sure if it helps on m1
<cy8aer>
Feature page:
<cy8aer>
> This greatly improves the UX on laptops when coupled with energy-aware scheduling
<cy8aer>
so I wandered what energy-aware scheduling is. @chadmed: I learned fingers away from cpuidle. And conservative or schedutil are the options for the cpufreq.
<chadmed>
we tell schedutil how much power the cpu core uses at each pstate and it can optimise for inst/W
<chadmed>
since the scheduler knows about the performance of each core, it can determine how much performance any given task "needs" and assign it to the most efficient core for the task
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<cy8aer>
ok, then my selection of schedutil was the best then.
<chadmed>
EAS hasnt been merged into asahi yet but yes schedutil will be the default going forward
<cy8aer>
thanks
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