EDIT3: this is NOT an overclock! Manually setting a scaling governor does not forcibly increase the intended frequency range of the CPU clock! Setting the scaling governor has more to do with performance management. In my case, setting it to “performance”, it simply forces the cpu to always run at the maximum frequency as designed by the manufacturer. Further reading here and here. Thank you @[email protected] for the reminder!
EDIT2: the tablet is rooted with Magisk ( https://topjohnwu.github.io/Magisk/install.html ) and Termux is running with superuser privileges granted through Magisk. The below command was issued after su - ing into a root shell. “performance” was echo ed into all available /sys/devices/system/cpu/cpufreq/.../scaling_governors, meaning, there are several subdirectories called policy[0...] in which the scaling_governor files reside.
EDIT: echo ing “performance” to /sys/devices/system/cpu/cpufreq/policy0/scaling_governor seems to have maxed out the cpu clockspeed! Now the tablet is snappy as hell! It’ll be interesting to see how battery drain and heat are affected by this. Thank you @[email protected] !
Say, by sending some value to something inside /sys/.../cpu or the likes. I have already aggressively debloated the tablet, but I like to experiment and I am not afraid to destroy the tablet since I bought it for 150 bucks at sale. Or pehaps there is some Magisk module that can do this?
The tablet is a Samsung Galaxy A9+.
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Usually (on laptops anyway) setting the performance governor only marginally increases throughput and/or latency, while significantly increasing power use. This is because the default behavior of ondemand governor is, almost always, to go to max clock speed practically instantly when there’s actual work to do.
In theory it can even have detrimental effect, especially with passive/inadequate cooling (which I assume an Android tablet would have), because the CPU will throttle automatically if it gets too warm, and disabling power saving features means it’ll run generally hotter.
You simply disabled the power management.
As dose most PC over clocking practically. It is just allowing chips to run at higher temps by removing the limitations on power designed to keep them managed.
Mobiles may be more strict. Due to battery life. But all over locking is considering the compremises and adjusting the priority.
With smart phones. The compromise is normally battery life rather then heat.
Desktops it’s adding extra cooling and shortening the design lifetime of chips in exchange for Greater CPU cycles.
Which resulted in what I was aiming for. There are other available scaling governors that yield different frequencies.
Thanks, i’ll try this on my anemic E-reader (Kobo Boox Leaf). It’s a bit painful to run, barely fast enough to not timeout Kotatsu (Manga).
But needs to be done each reboot.
I had no idea e-readers can do manga 😱😍 maybe I should get one, after all 😁
probably needs to be done after reboot and probably drains battery more than otherwise, but I have not done any testing as of yet. I sat at a café and played around with it for two hours, during which I couldn’t really notice any difference in power draw since the battery capacity is huge. Keep checking the OP, since I might update after some testing.
Not on stock ROM. IIRC back when I was messing with that kind of thing, you needed a custom kernel.
Thanks! I’ll go on and check if there is anything precompiled out there.
I’m surprised that worked since Termux has so many permissions and process # limits and stuff on stock Android. Is it permanent? Semi-permanent if you avoid losing ADB/Shizuku with restart?
EDIT: I’m running stock Android rooted with Magisk. OneUI 7, Android 15, Kernel 5.4.249
I haven’t tried rebooting yet, but I’m pretty sure it resets on reboot. Also, my only evidence that it worked is what cpuinfo_cur_freq reports, and because of how Android seems to works with its virtual filesystems and Termux only being a virtual terminal, I’m actually unsure of how to measure the true frequencies in any other way. Here are two screenshots anyway. 1804800 is the maximum available frequency.
Well keep everyone posted! I’ve got some old stock Android devices I’d love to fuck around with more but having to intervene with all of them is a tremendous boner killer
