Database Users

Thermothrotteling a performance killer on snapdragon N910F?

Hi,
I know that thermothrotteling is a feature to protect the cpu against damage. But what I notice that the temperature on my Note 910F is raising quire fast and that I am running into performance issue quite easily. Just playing arround the internet , watching something at youtube is bringing the device into the throtteling mode and than everthing is in slow motion (no hardcore games are neccessary). On my Note 3 I was never aware about such a situation.
Im using the Echoe rom 1.1 with the Ecoe kernel 3.5 (and fairly conservative power saving settings), but it is not kernel related because on stock it is the same.
Anybody facing a simelar situation?
Best regards,
dingolino

Thats not normal :/ i guess sd being 28nm and clocked at 2.7ghz does generate some heat

Your not alone. That is the very reason why I rooted my phone yesterday. The Samsung DVFS is very aggressive on my note 4 with 4.4 kittkatt.
Iv noticed in benchmarks once my phone heats up a little it drops the GPU and CPU down to about half speed and im only getting half the score and in gaming after a few minutes I would start to notice a little lag and my cpu speed would be staying at 1297. It slowly drops down to that then stays around there.
I disabled the Samsung DVFS and use setcpu aswell to keep it at the full speed while gaming and it works great now and the temps are hardly any different.

Many thanks for the feedback.
I have switched off Touch boost und set Max cpu to 1.9GHz
Will see how it works.
Best regards
dingolino
Gesendet von meinem SM-N9005 mit Tapatalk

It is quite annoying have such a fast phone but it downclocks both the cpu and gpu after a few mins of gaming.
A good test is GTA vice city with the settings cranked up.
With DVFS enabled once it hits about 56 degrees it starts to throttle and downclocks the gpu and cpu to about half and the game becomes a laggy mess.
With DVFS disabled its as smooth as butter but the temp goes up to about 70 degrees. Whats the max safe temp for this phone?

Matson123 said:
It is quite annoying have such a fast phone but it downclocks both the cpu and gpu after a few mins of gaming.
A good test is GTA vice city with the settings cranked up.
With DVFS enabled once it hits about 56 degrees it starts to throttle and downclocks the gpu and cpu to about half and the game becomes a laggy mess.
With DVFS disabled its as smooth as butter but the temp goes up to about 70 degrees. Whats the max safe temp for this phone?
Click to expand...
Click to collapse
I do not know the safe setting.
I am using the echoe kernel and this kernel offers the “intellithermal“ feature from faux. You can set the temperatures when frequency throttling should start as well as kernel throttling. They give in the faux app also some recommendations.
Maybe you give out a try.
But I am disappointed because the throttling is affecting “normal“ life not only hard core gaming and this is for me somewhat a design fault.
At least on my Note 4 F
I never had this on my previous devices that I cannot watch a movie which is stored at my sd card. I have a number of tutorial and maintenance videos which are handy to watch on the device.
Best regards
dingolino
Gesendet von meinem SM-N910F mit Tapatalk

I can confirm this on the N910W8. As soon as the device heats up the frame rates drop dramatically. I also don't game. Just day to day usage. It's strange that some fairly simple tasks can heat things up so much.
I removed my ScanDisk 64GB Class 10 SD card which seemed to improve the heat problem.
Also, when its cool it smokes through GeekBench 3. After it heats up it runs slower then a Galaxy S3.

Just you my friend, I don't have that problem
Sent from my SM-N910F (Note 4)

Donkon....can you let me know what your idle phone cpu temp is? you can use the CpuTemp app and just let me know what it idles at on your homescreen and what it heats up to in a demanding game. Just make sure its the CPU temp and not the battery. thanks
It would be good to compare.

Also I was just doing some tests and these are my results.. im curious to know if these are normal temps.
My phone idles at around 34-38 degrees c.
With DVFS enabled it never goes above around 56 degrees as that's when it starts throttling down.
Iv never had any slowdowns in youtube or videos or anything like that. Its only gaming really and benchmarks where it starts to throttle once it heats up and in a game like gta it starts to lag abit once it throttles as it takes the gpu and cpu down to about half speed.
With DVFS disabled im able to run the full 2647 cpu speed when gaming and its as smooth as butter. My temp in riptide goes up to 58 degrees. In GTA vice city it goes up to around 70 degrees and in the unreal benchmark demo it goes up to about 74/75 degrees. Do these sound like normal temps when your running the full speed of the cpu?

Yeah, it is ok.
The Exynos start throttling at 80°C.

Matson123 said:
Also I was just doing some tests and these are my results.. im curious to know if these are normal temps.
My phone idles at around 34-38 degrees c.
With DVFS enabled it never goes above around 56 degrees as that's when it starts throttling down.
Iv never had any slowdowns in youtube or videos or anything like that. Its only gaming really and benchmarks where it starts to throttle once it heats up and in a game like gta it starts to lag abit once it throttles as it takes the gpu and cpu down to about half speed.
With DVFS disabled im able to run the full 2647 cpu speed when gaming and its as smooth as butter. My temp in riptide goes up to 58 degrees. In GTA vice city it goes up to around 70 degrees and in the unreal benchmark demo it goes up to about 74/75 degrees. Do these sound like normal temps when your running the full speed of the cpu?
Click to expand...
Click to collapse
Which kernel are you using and what means “DVFS“?
Which app are you using for the kernel settings?
Best regards
dingolino
Gesendet von meinem SM-N910F mit Tapatalk

Im using the stock Kernel. Iv only rooted. I haven't installed a custom rom or Kernel yet.
the DVFS is samsungs own voltage and frequency control program. Its what causes the aggressive thermal throttling in kittkatt 4.4. Its been there for along time but in 4.4 its pretty much too aggressive.
When you disable it the phone wont throttle back the GPU and CPU and a silly 56 degrees so it wont start to lag in games after a few minutes.

If anyone has GTA vice city or the epic citadel unreal demo can they run it and tell me what there CPU temp goes up to in those.. I just want to make sure mines normal as it gets very hot. With DVFS it should go up to about 55-60 and without it will be around 70.

Does anyone have freezes followed by restarts when disabling DVFS for just some apps (using blacklist)? I have this problem and disabling DVFS for the whole system really annoys me (opening app speed is slowed down + power saving mode requires a restart). I'm using the exynos C version.

Lollipop Auto Brightness and Heating

Hi guys,
I am experiencing some strange "problems" ( or not ) with my N910C.
When I am using the auto brightness feature I believe my CPU and/or GPU is not performing as it should. For example, running AnTuTu with auto brigantines - 41-42k points, running it without auto brightness 51-52k points....
Also I believe the phone is lowering GPU and/or CPU performance very often due to temperature increase. My phone is not really hot but its not cold either.
I´ve tried games like Beach Buggy Racing and Modern Combat 5 and they do not run as smoothly as they should ( I think )
Is there any way to stop the CPU and GPU for lowering their frequencies due to temperature as I think the temperature is not high at all.
I am not using any power saver or anything else. Just pure stock Lollipop.
I had the same problem with KitKat. My best gaming and benchmark time is when my phone has been sleeping for a while.
Can someone confirm similar issues? For example if you run Antutu 3 times in a row what results are you getting? First around 50k, then the following around 41-42k
Thanks in advance.

Note 5 - CPU temperature

Hi all,
Loving the Note 5, but not loving so much how warm it seems to get in my hand, even under light/normal loading. I would be very interested to see some figures from other forum members. To make the test more accurate, I would suggest the following sequence.
MEASUREMENT 1
Close all open apps
Screen brightness 50%
Connect to WiFi (bad cell coverage might raise temperature)
Open App that allows you to see CPU thermal
Let the temperature settle down to a stable marker
Post temperature in celsius (apparently some of the apps have faulty Celsius to Fahrenheit conversion)
MEASUREMENT 2
Close all open apps
screen brightness full
Connect to WiFi (bad cell coverage might raise temperature)
Open App that allows you to see CPU thermal in the background
[*} Use camera app to film in UHD for 1 minute
Multitask switch to CPU temperature app
Read the temperature it reads immediately
Post temperature in celsius
MEASUREMENT 2
Random measurement...
Just any moment when you're doing light/normal stuff
Open the app and read the value in celsius
For me, the results are as follows:
Measurement 1 never goes below 30 degrees.
Measurement 2 was 73 degrees.
Measurement 3 is typically High 30's to high 40's.

1. 32C
2. 70C (within 5 seconds was down to 54C and within 10 seconds down to 42C)
3. 43C

Kaboose666 said:
1. 32C
2. 70C (within 5 seconds was down to 54C and within 10 seconds down to 42C)
3. 43C
Click to expand...
Click to collapse
Cool very similar!

Kaboose666 said:
1. 32C
2. 70C (within 5 seconds was down to 54C and within 10 seconds down to 42C)
3. 43C
Click to expand...
Click to collapse
it sounds to me that note 45 might throttle badly! anyone tried games on it? dead trigger - vain glory etc!

kamranhaghighi said:
it sounds to me that note 45 might throttle badly! anyone tried games on it? dead trigger - vain glory etc!
Click to expand...
Click to collapse
I've been playing KOTOR and hearthstone without any issues or slow downs. Not sure how intensive KOTOR is though.

Kaboose666 said:
I've been playing KOTOR and hearthstone without any issues or slow downs. Not sure how intensive KOTOR is though.
Click to expand...
Click to collapse
I don't know about KOTOR either but even my note 4 can handle hearthstone

kamranhaghighi said:
I don't know about KOTOR either but even my note 4 can handle hearthstone
Click to expand...
Click to collapse
Just played through the tutorial thing in Vainglory and the CPU temp got up to around 60C
game ran just fine, no lag or slow downs from what I could tell.

Kaboose666 said:
Just played through the tutorial thing in Vainglory and the CPU temp got up to around 60C
game ran just fine, no lag or slow downs from what I could tell.
Click to expand...
Click to collapse
Good! Maybe I would buy it if i knew i get updates and if it was cheaper!

Anyone else care to chip in? I'm starting to believe the warm in hand feeling is much more pronounced when I'm out and about and using 4G intensely (Youtube + browsing + Spotify). Here at home on WiFi it never gets as warm.

Played Angry birds 2 and PPSSPP emulator(cpu internsive) i do think that the Note 5 throttles, just like G4 or any other phone but not because of the temp, but the Interactive govenor is bugged.
I played tekken 6 on ppsspp and it played 35-50 fps with a bit of lag here and there, change to performance govenor, SAME TEMP, 60fps smooth NO LAG whatsoever, it made AB2 also way smoother.
It's the govenor that might cause the problem, not throttling.

Have to bring this back up to see if anyone is getting cpu spikes.
Coming from a nexus 6 that ran around 95°F on average. My N920T is always jumping from around 115°F to as high as 169°F. The temperature is never constant it's always going high to low. Trying to decide if I should exchange it.
Any help/advice would be greatly appreciated

tb417 said:
Have to bring this back up to see if anyone is getting cpu spikes.
Coming from a nexus 6 that ran around 95°F on average. My N920T is always jumping from around 115°F to as high as 169°F. The temperature is never constant it's always going high to low. Trying to decide if I should exchange it.
Any help/advice would be greatly appreciated
Click to expand...
Click to collapse
I've seen mine hit 80C (176F). This SoC just runs hot. Reminds me of Intel's mess called Haswell. Nothing to really worry about.

EtherealRemnant said:
I've seen mine hit 80C (176F). This SoC just runs hot. Reminds me of Intel's mess called Haswell. Nothing to really worry about.
Click to expand...
Click to collapse
I've actually exchange that phone for a new one. The new one has a more stable temperature reading and only gets that hot in testing applications. The new one is much better. I couldn't last a day on the old phone, and it lost about 25% while I slept for 5 hours the day before I exchanged it.

[Q] What do you do against overheating/lag during gaming?

As we all know, the Snapdragon 810 processor in our OnePlus 2 phones is prone to overheat, especially during heavy tasks such as gaming. With the stock kernel (which probably most of you are using) this leads to the A57 cores being partially or fully shut down and the display - which generates additional heat - being dimmed in order for the phone to keep a healthy temperature (healthy for both its components and the hands that are holding it.) This, in turn, leads to lag when playing especially demanding games. Which in turn leads to a frustrated user.
With root access, it's possible to use custom kernels and/or custom thermal throttling profiles in order to (at least partially) circumvent these issues, by throttling the CPU frequency and/or limiting the number of active cores, using different schedulers and governors, and by applying thermal profiles that allow the phone to get hotter (in order to keep higher CPU frequencies for a longer duration).
Since I bought the OPT, I was playing a very power hungry game - Republique - which, at its highest graphics quality setting, pushes the phone to its limits. I quickly switched from the stock kernel to the Boeffla kernel and started experimenting with schedulers, governors, hotplugging settings, CPU/GPU frequencies and thermal profiles, but nothing I have done so far makes it possible to play the game for more than 15-20 minutes before some kind of throttling / heat control sets in and the game starts lagging.
I tried limiting both CPU clusters to only 2 cores while maintaining higher frequencies, I tried throttling the frequencies and keeping all 8 cores active, and I tried all kinds of solutions in-between with anything from 4-8 cores active and frequencies anywhere between 60% and 100%. I also tried the various thermal profiles that the kernel offers. But whatever I did, the game was either lagging right from the start, or running smoothly for about 15 minutes before the screen was dimmed and the CPU was throttled, leading to a laggy experience.
So my question is, what do you guys do to keep the OnePlus 2 from overheating during gaming, while at the same time maintaining a lag-free experience? I don't seem to get anywhere with anything I try, so I'd be extremely grateful for some useful input.

vonotny said:
As we all know, the Snapdragon 810 processor in our OnePlus 2 phones is prone to overheat, especially during heavy tasks such as gaming. With the stock kernel (which probably most of you are using) this leads to the A57 cores being partially or fully shut down and the display - which generates additional heat - being dimmed in order for the phone to keep a healthy temperature (healthy for both its components and the hands that are holding it.) This, in turn, leads to lag when playing especially demanding games. Which in turn leads to a frustrated user.
With root access, it's possible to use custom kernels and/or custom thermal throttling profiles in order to (at least partially) circumvent these issues, by throttling the CPU frequency and/or limiting the number of active cores, using different schedulers and governors, and by applying thermal profiles that allow the phone to get hotter (in order to keep higher CPU frequencies for a longer duration).
Since I bought the OPT, I was playing a very power hungry game - Republique - which, at its highest graphics quality setting, pushes the phone to its limits. I quickly switched from the stock kernel to the Boeffla kernel and started experimenting with schedulers, governors, hotplugging settings, CPU/GPU frequencies and thermal profiles, but nothing I have done so far makes it possible to play the game for more than 15-20 minutes before some kind of throttling / heat control sets in and the game starts lagging.
I tried limiting both CPU clusters to only 2 cores while maintaining higher frequencies, I tried throttling the frequencies and keeping all 8 cores active, and I tried all kinds of solutions in-between with anything from 4-8 cores active and frequencies anywhere between 60% and 100%. I also tried the various thermal profiles that the kernel offers. But whatever I did, the game was either lagging right from the start, or running smoothly for about 15 minutes before the screen was dimmed and the CPU was throttled, leading to a laggy experience.
So my question is, what do you guys do to keep the OnePlus 2 from overheating during gaming, while at the same time maintaining a lag-free experience? I don't seem to get anywhere with anything I try, so I'd be extremely grateful for some useful input.
Click to expand...
Click to collapse
All the phones throttle while gaming. I use thermal extreme with boeffla kernel. And use 2 a53 at 1,3ghz and 2-4 a57 at 1,4ghz and I modified the throttle file and it underclock to 1,2ghz when it gets hot but it doesn't happen if you don't play longer than 30minutes and it doesn't lag either. You can leave stock settings but if course it will get hot quicker. Also with thermal hotplugged or something like that, I used it all cores online all the time at full speed and it doesn't throttle for a long time, so I don't know what overheating are you talking about. My nexus 5 throttle faster and disable 2 of 4 cores and leave the other 2 at half speed, and our processor overheats?. Oneplus throttle the device a lot because of the rumors, fortunately we can change that. Try what I said, cheers.
Sent from my ONE A2005 using Tapatalk

Migdilu said:
All the phones throttle while gaming. I use thermal extreme with boeffla kernel. And use 2 a53 at 1,3ghz and 2-4 a57 at 1,4ghz and I modified the throttle file and it underclock to 1,2ghz when it gets hot but it doesn't happen if you don't play longer than 30minutes and it doesn't lag either. You can leave stock settings but if course it will get hot quicker. Also with thermal hotplugged or something like that, I used it all cores online all the time at full speed and it doesn't throttle for a long time, so I don't know what overheating are you talking about. My nexus 5 throttle faster and disable 2 of 4 cores and leave the other 2 at half speed, and our processor overheats?. Oneplus throttle the device a lot because of the rumors, fortunately we can change that. Try what I said, cheers.
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
Thanks for the tip with thermal extreme! The implementation in the latest Boeffla kernel v1.1 beta1 seem to do a very good job of not letting the phone get too hot while at the same time not throttling the CPU too much. Today, the performance was stable for almost 30 minutes of gaming, and when I checked the CPU stats I saw that all cores were still active (2x A53 + 4x A57), and only throttled to 960 MHz. This still delivered enough performance. (I started the game with both CPU clusters at 1.2 GHz, so this also seemed to help with keeping the phone at an acceptable temperature. I'm sure it would've gotten much hotter much quicker at higher CPU frequencies.)
I have to admit though, I was playing inside in an unlit room and thus the screen wasn't at max. brightness. We'll see how it will perform during my next work break when I have to make the screen much brighter.

vonotny said:
Thanks for the tip with thermal extreme! The implementation in the latest Boeffla kernel v1.1 beta1 seem to do a very good job of not letting the phone get too hot while at the same time not throttling the CPU too much. Today, the performance was stable for almost 30 minutes of gaming, and when I checked the CPU stats I saw that all cores were still active (2x A53 + 4x A57), and only throttled to 960 MHz. This still delivered enough performance. (I started the game with both CPU clusters at 1.2 GHz, so this also seemed to help with keeping the phone at an acceptable temperature. I'm sure it would've gotten much hotter much quicker at higher CPU frequencies.)
I have to admit though, I was playing inside in an unlit room and thus the screen wasn't at max. brightness. We'll see how it will perform during my next work break when I have to make the screen much brighter.
Click to expand...
Click to collapse
Does it throttle to 960mhz? for me never reach 1,2ghz. Playing real Racing for 30min it stays at 1,2ghz. And with thermal hotplugged (all cores enabled, all at stock freq gpu too) it doesnt throttle for 30 min, gpu only sometimes to 510mhz, i played 30 minutes and it didnt throttle, i dont know when it was going to throttle because i stop playing. But also, gaming with all cores and no throttling eats the battery.

Migdilu said:
Does it throttle to 960mhz? for me never reach 1,2ghz. Playing real Racing for 30min it stays at 1,2ghz. And with thermal hotplugged (all cores enabled, all at stock freq gpu too) it doesnt throttle for 30 min, gpu only sometimes to 510mhz, i played 30 minutes and it didnt throttle, i dont know when it was going to throttle because i stop playing. But also, gaming with all cores and no throttling eats the battery.
Click to expand...
Click to collapse
I guess it throttled to 960 MHz because the game I'm currently playing (République) is pretty resource hungry.

Guide for playing PUBG smoothly

NO LAG, CHOPPINES. PLAYING FOR FEW DAYS. APPLICABLE TO ALL SNAPDRAGON 810 DEVICES!
Update: Connect to charger if it lags. I've getting screen unresponsiveness after playing a few days without charging. Connecting to charger those lags are gone. Always try to play with mics and speakers off in game. Always cool your phone. It will feel burning otherwise.
Hi. I've seen lots of videos on YouTube, PUBG doesn't run properly and lags a lot on our device. Also its same on other snapdragon 810 devices. But its a high end chipset why should it lag? PUBG lags because of its throttling. But without throttling then burning heat.
Now do these:
I'm not responsible if anything bad happens.
1. Keep backup and delete thermal-config file, reboot.
2. Lower your CPU and GPU frequencies according to your game quality settings. Example: For Smooth and Medium FPS, set CPU to- big:960/633, little:1478mhz. or lower. GPU settings- 450/390 MHz. Check your settings and frequencies by yourself while playing.
You can disable CPU input boost if you feel.
3. Run A.C or Fan in your house, or play in much lower temperature.
4. Now run the game.
It won't lag, hang, and will run stable. But the device heats much. I tried even on HD at Ultra fps(GPU frequency didn't lower), the game ran perfectly and smoothly. though I lowered the CPU frequencies.
For HD and Ultra FPS:
1. CPU- big:1248(I tried and think enough, you may increase or decrease), little:1478.
2. GPU- I didn't lower GPU frequencies, it was running at 650, you may try 510 MHz.
3. Keep in mind to play in much lower temperature. Device will heat a lot. But won't lag a bit.
You can try. I'll update this thread sometimes.
Note: Always remind to paste thermal-config file in same directory and reboot, when you need. Also battery will drain faster in these. I tested it drains upto 27 percent per hour with throttled, and 29/30 percent without throttled on Smooth and Medium FPS with those settings.

*8*updated tested frequencies.