Thermal Throttling... Let's talk about it
Please, after reading my post, don't blame me or suggest things like "mobile devices aren't meant to play or aren't meant to replace pc", I'm not looking for surrender, I'm looking for advices or proposals.
Several times I've noticed Thermal Throttling (from now TT ) effects on our device, because during high-resource-demanding apps, for example Real Racing 3 (but everyone can have his own high-resource-demanding app example), TT decreases cpu frequencies (maybe gpu too?) when it reaches a certain temperature, causing framerate drop. With cool-phone RR3 has superb framerate, but when phone becomes hot (after 6-7 minutes), there's a noticeable framerate drop caused by TT. You can notice this just by watching at asphalt flow under the car or how trees move in the environment.
This is normal, TT is normal and good beacuse it prevents high-temp damage, "but" I think that LG (or qualcomm or android) has implemented this function in a wrong way, not optimal. If this effect is so significant, it means that cpu frequencies cut is too much! I think it cuts in "half" cpu frequency, but it's a very conservative behaviuor, it's too much! If we consider another device, for example 4-cores clocked at 1,2 GHz, this device won't have 50 fps as G2 (in first minutes), maybe it will have 40 fps all the time, but it won't throttle down; G2 instead will throttle down and framerate will drop to 25 fps, which is not optimal, until it will cool (when stop playing, because it won't cool during playing). If these two devices were two cars, slower car would be the fastest because it will be constant and have best lap times.
First of all, there's a "normal" hardware problem that involves cooling and this problem can't be faced. But it's a software problem too, in the way TT is tuned; TT setting is what we shall deal with.
How can we achive this? There are several ideas:
1) Reading through forums I read about two possibile secret menu settings (3845#*802# ... 802 is phone model):
a) Thermal mitigation daemon off: this value should affect screen light dimming to lower temp, but it's not something that can slow down fps;
I tried it but my phone rebooted after 5 minutes playing and went into bootloop...
b) High temperature priority off: this value should affect TT temperature start treshold, for example increasing it from 60°C to 70°C, that is still a safe (internal) temp; I noticed a decreased TT effect, but it doesn't disappear. It simply happens after more time (for example after 10 minutes instead of 5). It's not a ultimate solution;
2a) Lowering max cpu freq to a value that prevents reaching TT treshold; but it depends also on environment temp, we should make too much tries; can someone say what max cpu freq to set? Obviously not to low... if 1.8 GHz it's good, if 1.4 GHz it will be better sell G2 and buy a less hardware performant nexus 4, but in real life better in performance than G2 because N4 can be less affected by TT;
2b) Lowering voltages, same as 2a), it's very difficult and we won't be sure to solve the problem;
3) There are several system files ( http://forum.xda-developers.com/show...472318&page=43
) that can be involved in TT tuning... Very difficult to achieve...
4) If TT can be tuned by kernel, a custom kernel with better TT tuning... hoping in a dev. (I think this would be the best solution).
What do you think about?