[OnePlus 8 / 8 Pro & 8T Cross Device Development] mslezak:
Updated 7/31/2021 rebased on Acuicultor's v2.2.5 rebase (OOS) and rebase_custom (custom ROMs).

[NOTE: Bug reported - with a Magisk Module I created to fix it. For some strange reason (code looks fine), some systems are setting the default GPU frequency to 920mhz and default power level to 0 (max). I have posted a small Magisk Module that waits 5 seconds then corrects these values (295mhz default and power level 8). It's on the GitHub release page - MOD-GPU-Set-Min-Freq.zip. Just install with Magisk Manager as a module / install from storage after downloading.]

This is a tweaked version of RadioActive kernel by acuicultor modded for higher performance and lower idle drain. All source commits and releases are on my GitHub fork:

https://github.com/mrslezak/Radioactive_kernel_oneplus8/releases/tag/v2.2.5-MOD

PLEASE read the Readme as well as the disclaimer. Whenever you flash a custom kernel, you do so at your own risk. I recently rebased on the dev's work (GPU_OC OOS branch, never released) and set the wakelock blocks up myself (lower idle drain, tested over a week with no loss in functionality), dropped the base GPU frequency to 295mhz and raised the top ones (800/920mhz) acuicultor you're an awesome dev, great to have you around! All credits should go to him other than my tweaks.

I also merged all the same changes into the Custom ROM branch which didn't have GPUOC or AdrenoBoost - several people are using it now but it's marked as a BETA since I am on OOS (latest Global) and can't test it myself. NOTE: many people on the TG channel I posted to have tried it and have had no issues on Op8, Op8 Pro, and Op8T.

Note if you are one of the rare people who see artifacts in games or benches, the easiest fix is to go into your kernel manager and set the max GPU frequency to 800mhz and apply on boot. Not all 865 Adreno GPUs are created equal. I haven't seen one that couldn't handle 900mhz to date, but enough people have had no issues at 920mhz so that's where I put it.

Be sure to flash Magisk before installing, then use EX Kernel Manager or FK Kernel Manager to Flash the kernel zip. It has all the same optimizations of RadioActive kernel, just modded for really nice performance and low battery drain. Adreno Boost is set to low on default which makes it react faster as the GPU scales. If you already have Magisk installed, there is no reason to reinstall it - the AnyKernel 3 zip installer will use what's installed already.

I put one out there you can just flash from: fastboot flash boot 4.19.110.RadioActive-WL-295_UC-920-GPU-2.2.5.img (OOS only) as it saved my a$$ a couple times when flashing or trying to apply an incremental update when rooted (no success, although I posted the incremental update on TG, the payload just won't extract properly to update using fastbootd scripts)... Maybe I'll post it here on XDA and see if anyone can extract the latest Op8T update.

Also someone sent me a PM about using KonaBess app to change frequencies even more, or change regulators, or change the DDR clock speeds. Yes, it works. Note you probably should only play with that if you have a fastboot image available in case it doesn't boot! I did just upload one for OOS to the repo as I mentioned above. Be warned, you're on your own there.

Hope you all enjoy!

- MattOfTheDead / Red Magic 5G MOD kernel (Q) / Xiaomi Mi9 / Mi9T Pro MOD kernels (Pie/Q) / next in line is probably a 2022 device - 888s didn't make the cut