Database Users

overheating and purple smudge

okay so i got my s4 I9500 arnd 2 weeks back..
now i have been through the forum nd seen many posts fr overheating issues mainly.
sorry fr posting a new thread..
the main 2 issues i am facing is overheating(main) and purple smudge in contacts(which m nt really concerned of)
The phone is overheated when i play any type of game..be it nfs most wanted..subway surfers..temple run 2..or any normal game..nd while charging also the phone gets very hot..u can touch the screen while charging nd feel the heat..
now my question is that is this a S/W issue or H/W??? what shud i do for this overheating problem...its really very annoying that u pay Rs 40300 for a phone nd it has such type of problems..spending 40300 nd getting such crap?? not worth it..
I really hate samsung for this..first they said octa core which is actually 2 quad cores..then battery life is terrible even though its 2600mAh battery..then such overheating problems...what the hell are samsung charging for??? plastic body?? m really upset with samsung..didnt expect this type of quality nd service frm them.. they are just bloody " SHOW-OFFS"..
nw i dont know what shud i do with this phone.. (

As far as charging "heating" it's because it is charging extremely fast (2mAh charger) so the battery heats up and the screen as well (because of the device's thickness the battery is very close to the screen as well).
As far as gaming overheating, it's because this high end (yes, even subway surfers and temple run 2) games that uses all the A15 cores (even if the game needs only one A15 core). According to AndreiLux, the kernel is designed in a way where only all A7 cores work or all A15 cores work and no any other combination.
He also mentioned that he isn't sure whether it's an h/w or s/w limitation. I think it's a s/w limitation that will get fixed with an update because Samsung already showed (on a tablet) how the core migration works (A15 and A7 working together).
And since this configuration present, also the battery seems not as good as the one Samsung mentioned (the A15 cores consumes much more power than A7 cores).
Don't worry, Samsung knows what their doing

next time before u buy a phone check the specs seriously octa core ?? it's a phone not allien ware
and also check the forum for people's issues
and don't blame samsung for this they just rushed the 4.2.2 that's why and if u don't like it there is always that overpriced iphone for u to buy out there

@Blackwolf10
1)yes its a phone so what,,if samsung is claiming octa core then we shud get octa core..y pay more when only one processor runs at a time..
3)who else shud i blame den, if nt samsung..they r d ones who made this phone..so they r to blame..
i wasnt being rude in anyway..its just that m upset that i paid this much amount nd got a phone which has so many problems..just like other people..

ankitmathur said:
@Blackwolf10
1)yes its a phone so what,,if samsung is claiming octa core then we shud get octa core..y pay more when only one processor runs at a time..
3)who else shud i blame den, if nt samsung..they r d ones who made this phone..so they r to blame..
i wasnt being rude in anyway..its just that m upset that i paid this much amount nd got a phone which has so many problems..just like other people..
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1) Octa means the number of cores there are in the phone, and they are specifically write in their spec sheet that it's 4 A15 and 4 A7 in big.LITTLE architecture. If you didn't do the research, or didn't pay attention to this it's not Samsung's fault.
BTW, still (with "only" 4 cores) this phone outperforms any other phone out there, both in synthetic benchmarks and in actual heavy tasks (such browsing and 3D gaming).
Also, how did you expect from 8 cores to consume less energy if all of them works together?
2) where is it?
3) Blame for what? All your arguments against them are invalid, can be fixed (and will be if you remember the overheating and battery problems last year) or presents in other phones (Overheat in games happens in the S3, HTC one, HTC one X and every other high end smartphone).

I9505 feels laggy in games!

I used to play GTA vice city in my note 2 N7100. It was so smooth, now im playing the same game but it feels laggy. It looks like im playing below 30 fps.
I think its something with the game or driver issue. Anyone with same problem?
Sent from my GT-I9505 using Tapatalk 4 Beta

Haven't had any lag on a single game I have played myself, although GTA isn't one of them. Perhaps there is a compatibility issue. One thing is for sure, it isn't the I9505 being too slow.
Sent from my Qualcomm Galaxy S4

This happens in many games. It shouldnt, but it does. And it is known and odd issue.
I play lot of 2D games like Hill climb racing, bubble shooter etc and those games used to play fine on last year's hardware. Even if we are talking about 1080P screens, these games play fine on Oppo Find 5 which has same GPU as ours and inferior Krait 200 CPU. And it plays those games fine. But microstutter is experienced on I9505 as well as HTC One. Both of them are using S600 chip.
A lot of tinkering and manual CPU frequency lock at max speed (manually or though setcpu profiles ) reduces the jitter and microstutter, but it does not still completely eliminates it.
Hell these games play fine on Mediatek MTK6589 SoC.
I am not able to solve this on my either S600 phones for over a month now.
It is not SGS4 exclusive issue. Either these games are not optimised for S600 or governors on these phones are not ramping up GPU clock when required or there is thermal throttling happening.

Funkym0nkey said:
This happens in many games. It shouldnt, but it does. And it is known and odd issue.
I play lot of 2D games like Hill climb racing, bubble shooter etc and those games used to play fine on last year's hardware. Even if we are talking about 1080P screens, these games play fine on Oppo Find 5 which has same GPU as ours and inferior Krait 200 CPU. And it plays those games fine. But microstutter is experienced on I9505 as well as HTC One. Both of them are using S600 chip.
A lot of tinkering and manual CPU frequency lock at max speed (manually or though setcpu profiles ) reduces the jitter and microstutter, but it does not still completely eliminates it.
Hell these games play fine on Mediatek MTK6589 SoC.
I am not able to solve this on my either S600 phones for over a month now.
It is not SGS4 exclusive issue. Either these games are not optimised for S600 or governors on these phones are not ramping up GPU clock when required or there is thermal throttling happening.
Click to expand...
Click to collapse
Try setting the GPU Governor to performance while you are playing to see if that solves the issue.

Toss3 said:
Try setting the GPU Governor to performance while you are playing to see if that solves the issue.
Click to expand...
Click to collapse
That is exactly what I do. In SetCPU I have created custom profiles for games.
It just reduces the jitter, does not eliminate it. Funny thing is, some more heavy games play just fine.

same issue
i have the same issue with vice city, on s3 it was so smooth and now i uninstalled the game because i dont like shuttering... it was lagging like hell nfs most wanted, carmageddon etc are working great.

What I have seen is that the SoC Heats up very quick and it begins to throttle down CPU and GPU frequencies to cool itself! Our phones should theoretically be 1.9GHz beasts and they are..... for 15 to 20secs! Then everything goes to hell as the CPU throttles down to 918MHz (GPU too goes down) and it actually becomes slower than last year's Phones!
I hate Mobile technologies! My Acer Iconia W700Pro behaves the same! It has an Intel Core i5 3317U CPU with an Intel 4000HD Graphics GPU and it should be able to play many games without problems but Because of throttling it is actually Slower than an i3 CPU if you rum longer tasks!
Somebody must begin thinking of new ways to cool these CPUs instead of ramping Up MHz just so manufacturers can brag about it!

That's why I keep my Note 2 (I sold my S4 already, mainly because of the pen)
It's very cool, no throlling in any case, perfect smooth with no lag at all. Stability test proved it the best also.
I don't know why reviewers and many people keep screwing about benchmark and raw power. They are BS and do not convert to the real experience.

Maybe because these games are not optimized for FHD resolution?

They play well on i9500. I really want octa but 4G is fast where I live.
Sent from my GT-I9505 using Tapatalk 4 Beta

*Emix* said:
Maybe because these games are not optimized for FHD resolution?
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Click to collapse
Nope. If that was the case they would have problems with my i9500 or Oppo Find 5. They work fine on these.
9500 does not even get warm playing Hill climb racing.
This issue is specific to Snapdragon S600 powered phones.
From my Galaxy S4 Exynos, in your face.....

Should I exchange my i9505 for i9500 or wait for solution or software update that fixes this lag?

Have you activated the 4x MSAA under Developer options?
Many of my games started to lag quite alot after i enabled that. So i turned it off and every games runs buttery smooth.

Maybe if you make a profile to undervolt and underclock your phone, just to prevent it to get too warm, the the throttling won't underclock teh GPU because of war issues.
I just Undervolt 50mv on all frequencies and it seems fine on all games!

tiaolipa said:
Maybe if you make a profile to undervolt and underclock your phone, just to prevent it to get too warm, the the throttling won't underclock teh GPU because of war issues.
I just Undervolt 50mv on all frequencies and it seems fine on all games!
Click to expand...
Click to collapse
Interesting, can you please give some brief steps to achive it? Which app you use and setting etc. Are you sure, it works? For example, if you disable undervolt/underclock, some games start to lagg?

i have both GTA 3 and vice city aswell as modern combat 3 and 4, and all of them works fine on my S4, although i have the octacore i9500 version.

I have the i9500 version ( Octa ), and faces this problem a lot and also most of the times the phone gets hot and starts draining the battery too fast !! so it's not throttling at all with this temperature and battery drain !!
I had this problem with Note2 but not as much as S4 ( and without getting hot or eating the battery !! ).. the S4 sometimes gives me as low as 1FPS or less sometimes ( measuring by eye )

Jason2k13 said:
i have both GTA 3 and vice city aswell as modern combat 3 and 4, and all of them works fine on my S4, although i have the octacore i9500 version.
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Click to collapse
And do you notice overheating when playing? How bad is it? Can you compare it with your previous phone?

I have a i9505 and are not that butter smooth as on my old i9300. But then again after the latest MEA update it's better then before. Not perfect but its something. This sure means they can fix it over time. I did not own a i9300 for long but I assume at launch that phone had the same problems as this one. After a while with update the phone became smooth right?
About the heating issues. I don't really think its a problem. CPU and GPU will get hot while playing games like Modern Combat 4. The iPhone 5 also gets really hot so its nothing abnormal. Mine is getting hot while playing games but not concerning hot.

renosj said:
Interesting, can you please give some brief steps to achive it? Which app you use and setting etc. Are you sure, it works? For example, if you disable undervolt/underclock, some games start to lagg?
Click to expand...
Click to collapse
I use Ktoonsez Kernel. It comes with an app that lets you control all that.:good:
For how to install the kernel though, I'd rather not give any advice on that, because I have done quite a mess on my own device on my mistakes during the instalation. I never had any problems installing Kernels on my Galaxy S2, S3 and Note2, but on the S4 I'm still pretty inexperient.
On the Kernel and Roms foruns you will find plenty XDA users that can help you on the installing process sweetly though!

HTC One Snapdragon 800 ???

It's been some time now since I've heard rumors of HTC upgrading their One phone with the newer Snapdragon 800 processor chip. Anyone else have anymore information on a possible release date for it?
Sent from my SCH-I605 using xda premium

One X > One X+ was 8 months.
That would land the One+ in October, right there with the iPhone 5S.
Makes sense to me!
On a side note, LG G2 is being announced tomorrow. It's pretty cool looking, but we'll have to see if it implements the 800's native always listening capabilities from the start. I highly doubt it. OEMs might let Moto X be the test dummy and see if people like the always on feature.

Is the 800 the same architecture as the 600??
Sent from my HTC One using XDA Premium HD app

dmarco said:
It's been some time now since I've heard rumors of HTC upgrading their One phone with the newer Snapdragon 800 processor chip. Anyone else have anymore information on a possible release date for it?
Sent from my SCH-I605 using xda premium
Click to expand...
Click to collapse
any link to those rumours? so far our leakers are denying such device
but i really wish it happens

The One Max will probably get the 800. I don't think they will release a One+.
Sent from my HTC One using Tapatalk 4

HTC One Max Specs:
6" 1080p SLCD 3 Display
Qualcom Snapdragon 800 @ 2,3 GHz
2 Gb ram
32/64 gb Memory
3200mah
If everything goes right we will See the phablet fight in September against the SGN 3.
Rumors appeard where the Max should have a 3300 mAh battery and a microsd slot
Send from my Phonebox
---------- Post added at 12:23 PM ---------- Previous post was at 12:20 PM ----------
hamdir said:
any link to those rumours? so far our leakers are denying such device
but i really wish it happens
Click to expand...
Click to collapse
Its a german site, but also well informed.
http://www.mobilegeeks.de/htc-one-max-erste-fotos-geleakt/
Send from my Phonebox

The One Max is pretty much confirmed
I was asking about One+ rumours (same size) and i agree i dont think its happening

From the way the phone is overheating while you play games, I dont think they will be putting a faster CPU into the phone.
Maybe a faster GPU or an new gen of more efficient ARM processors
The current quad cores are already plenty fast for normal phone use.

We don't need s800 imo.. s600 is fast enough for me. But i wouldn't mind Adreno 330 gpu.

The One Max is not an upgrade over the One. I hope everyone realizes this. It will be very difficult to handle and heavier.
Sent from my HTC One using xda premium

musezer said:
From the way the phone is overheating while you play games, I dont think they will be putting a faster CPU into the phone.
Maybe a faster GPU or an new gen of more efficient ARM processors
The current quad cores are already plenty fast for normal phone use.
Click to expand...
Click to collapse
I wish android OEMs start getting some sense into their heads, we don't need more CPU power at this point, just GPU
Sadly this is a call for the SOC vendors to make

hamdir said:
I wish android OEMs start getting some sense into their heads, we don't need more CPU power at this point, just GPU
Sadly this is a call for the SOC vendors to make
Click to expand...
Click to collapse
New GPU and LPDDR3 would be a nice bump in performance.

Screw both CPU and GPU, better battery tech FFS.
We didn't need 1080p screens and mobile SoCs that are coming close to mid 2000's laptop power.
But it's hell asking for a phone to have two days standby time with heavy usage (6+ hours screen on) without wifi.

musezer said:
From the way the phone is overheating while you play games, I dont think they will be putting a faster CPU into the phone.
Maybe a faster GPU or an new gen of more efficient ARM processors
The current quad cores are already plenty fast for normal phone use.
Click to expand...
Click to collapse
I think you just don't understand what overheating means...
Sent from my HTC One using Tapatalk 2

I think the spec madness has to stop.
Always listening should become a standard from now on. I read from Blinkfeed that the 800 has native support for it.
We also need better battery life. The G2, a next gen phone, has a 3000 mAh battery. We'll see if that'll be enough.
There is research being conducted to incorporate Silicon anodes in Li-ion batteries. I'm looking forward to that.
Another thing is heat dissipation. These things are more powerful than a laptop from the early 2000's. How can mfgs expect these to run at their full potential with no heat dissipation? Currently, the only solution provided is to throttle the CPU severely. The One has a metal backplate, which thankfully acts as a huge heatsink. However, it's not enough. Just 10 mins of 3D gameplay or browsing and the frame rate drops to rock bottom. Kinda defeats the purpose of having such a powerful processor.
Are any mfgs even trying to address the heat issues?

sauprankul said:
I think the spec madness has to stop.
Always listening should become a standard from now on. I read from Blinkfeed that the 800 has native support for it.
We also need better battery life. The G2, a next gen phone, has a 3000 mAh battery. We'll see if that'll be enough.
There is research being conducted to incorporate Silicon anodes in Li-ion batteries. I'm looking forward to that.
Another thing is heat dissipation. These things are more powerful than a laptop from the early 2000's. How can mfgs expect these to run at their full potential with no heat dissipation? Currently, the only solution provided is to throttle the CPU severely. The One has a metal backplate, which thankfully acts as a huge heatsink. However, it's not enough. Just 10 mins of 3D gameplay or browsing and the frame rate drops to rock bottom. Kinda defeats the purpose of having such a powerful processor.
Are any mfgs even trying to address the heat issues?
Click to expand...
Click to collapse
Why you want yet an new ONE yet??? Its the better android phone now overall by far.. The differences with the snapdragon 600 and the 800 there are minimals.. I prefeer all day the One near the lg G2 big plastic crap.
Sent from my HTC One using xda app-developers app

I read in an article that the lg g2 laged on random things they said because lg's ui is heavy

giorat23 said:
Why you want yet an new ONE yet??? Its the better android phone now overall by far.. The differences with the snapdragon 600 and the 800 there are minimals.. I prefeer all day the One near the lg G2 big plastic crap.
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
Subtleties, my good man.
I never said I wanted a new One right now. That would be nice, but it isn't necessary.
And I didn't say I wanted an S800, I simply said that the next generation of devices should implement the native always listening feature. And the 800 makes several significant improvements.
http://m.techradar.com/news/computi...mm-processor-will-always-be-listening-1132647
And believe it or not your precious phone (and mine) will be outdated in a matter of months. A new genreation of devices seems to release every 6 months or so!
I was commenting on a disturbing trend the Android smartphone market is exhibiting: an obsession with theoretical values and inflated numbers. While these do help to some degree, there needs to be some kind of innovation, or else we'll all end up in a very uncomfortable situation.

sauprankul said:
I think the spec madness has to stop.
Always listening should become a standard from now on. I read from Blinkfeed that the 800 has native support for it.
We also need better battery life. The G2, a next gen phone, has a 3000 mAh battery. We'll see if that'll be enough.
There is research being conducted to incorporate Silicon anodes in Li-ion batteries. I'm looking forward to that.
Another thing is heat dissipation. These things are more powerful than a laptop from the early 2000's. How can mfgs expect these to run at their full potential with no heat dissipation? Currently, the only solution provided is to throttle the CPU severely. The One has a metal backplate, which thankfully acts as a huge heatsink. However, it's not enough. Just 10 mins of 3D gameplay or browsing and the frame rate drops to rock bottom. Kinda defeats the purpose of having such a powerful processor.
Are any mfgs even trying to address the heat issues?
Click to expand...
Click to collapse
Are you unlocked? With ElementalX kernel, you have custom thermal throttling that does not affect gaming performance. My phone never throttles and the battery stays below 50 degrees. HTC's throttling was way too agressive. You can play a 3D game for an hour with no slowdown. Plus, the kernel improves battery life.
I cant stand the stock kernel any more after trying others.

I remember my boyfriend buying the LG Optimus 2x when it was released. It was the first Android phone with dual core and - if you took a look on the hardware - very, very promising compared to other androids. Yeah... Theory. It was laggy. It lagged so much, even my HTC Desire was faster and smoother.
I'm really curious what the new LG G2 will act like, but my expectations are extremely low
Sent from my HTC One

This phone is a scam.

I bought this phone because of the quad core 1.9Ghz processor, but as a matter of fact, this phone is a quad core 19ghz processor only for 5 or so minutes at a time, then it's just a 1.2Ghz quad core processor.
I don't know what's the reason for this, but I suspect overheating or Scamsung being shady and still cheating the benchmarks.
Anyway, try this: download Antutu Benchmark (or any other benchmark really) and run a full test: if the phone is "fresh" you'll get 29000 or so points. Good. Now run it again, you'll get less, and if you run it again, you'll get even less.
What do you think is the reason for this? This phone is unable to keep it's maximum frequency for more than 5 minutes at a time, and so it underclocks itself to 1.2Ghz (check it with CPU Z or anything, it will never go to 1.9 ever again after you get the lowered score in Antutu) and stays there for hours before it goes back to 1.9 again.
Check out these screenshots, and look at the time I ran the benchmarks. It only took 3 minutes to go from 29000 to 26000, then I ran it 2 more times and it went as low as 22000 with massive performance losses in 3D graphics (OpenGL test runs at around 30-40fps the first time then 15-24, basically half speed).
If this isn't a scam I don't know what it is. They should have advertised this as having a quad core mode for 5 minutes every now and then, or being a real quad core only in winter, because as a matter of fact it runs like a mid tier dual core most of the time. No wonder the UI lags like crazy all the time after you browse the internet a while or play a 3D game.
Sent from my Scamsung gaLAGsy S4.

This is not scam. This is **** done by samsung in 4.4.2 update. They enabled something called dynamic voltage and frequency scaling.
There is a xposed module to disable it.
See this thread for more info - http://forum.xda-developers.com/showthread.php?t=2674928
Sent from my GT-I9500 using XDA Premium 4 mobile app

maxsam4 said:
This is not scam. This is **** done by samsung in 4.4.2 update. They enabled something called dynamic voltage and frequency scaling.
There is a xposed module to disable it.
See this thread for more info - http://forum.xda-developers.com/showthread.php?t=2674928
Sent from my GT-I9500 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Really now. I need to try this, because right now I'm MAD. I had a similar problem with the Xperia S that happened only when playing and charging at the same time, and you can't believe how angry I was at that.
Since I bought the phone just recently and it was already on KitKat, and I did some googling for i9505 and overheating and all sorts of related keywords and found nothing, I expected this behavior to be pretty much undiscovered. I'll try the exposed module and report back.
Anyway, since you need root, and mods, the phone is still a scam because the average user wil NEVER EVER figure this out on his own. It's advertised as a 1.9Ghz quad core when in reality it never runs at that speed.

I confirm that it was caused by the DVFS. What were they thinking when they implemented such a thing on the phone?
Facepalm.

MarkMRL said:
Really now. I need to try this, because right now I'm MAD. I had a similar problem with the Xperia S that happened only when playing and charging at the same time, and you can't believe how angry I was at that.
Since I bought the phone just recently and it was already on KitKat, and I did some googling for i9505 and overheating and all sorts of related keywords and found nothing, I expected this behavior to be pretty much undiscovered. I'll try the exposed module and report back.
Anyway, since you need root, and mods, the phone is still a scam because the average user wil NEVER EVER figure this out on his own. It's advertised as a 1.9Ghz quad core when in reality it never runs at that speed.
Click to expand...
Click to collapse
1.9 ghz is it's max speed which it does achieve for first few minutes when a game runs and hence it is not a scam. No mobile processor runs at it's max frequency 24/7 or else you would have to keep charging the phone every hour and the phone would probably die in a day due to overheating -_-
Samsung did this to increase battery life but the move backfired
The only way you can do something about is by rooting the mobile which infact will void ur warranty.
Press the thanks button if helped you
Sent from my GT-I9500 using XDA Premium 4 mobile app

maxsam4 said:
1.9 ghz is it's max speed which it does achieve for first few minutes when a game runs and hence it is not a scam. No mobile processor runs at it's max frequency 24/7 or else you would have to keep charging the phone every hour and the phone would probably die in a day due to overheating -_-
Samsung did this to increase battery life but the move backfired
The only way you can do something about is by rooting the mobile which infact will void ur warranty.
Press the thanks button if helped you
Sent from my GT-I9500 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
It should run max speed when needed, of course it won't run at full speed all the times, but if it runs at 1200mhz when I'm running a game or the browser and it's lagging like crazy then there's a problem.
I already rooted, voided my warranty, tripped my know, and fixed this issue with the xposed module the other user recommended.
Bottom line, unless you void your warranty and install user made mods this phone is a scam, because as soon as it get slightly warm it underclocks like crazy causing lag and horrible performances. There should be lawsuits up the ass about this. Users shouldn't accept having their phone arbitrarily underclocked for no reason like this.

What a retard.
Sent from my SM-G900H using XDA Premium 4 mobile app

MarkMRL said:
It should run max speed when needed, of course it won't run at full speed all the times, but if it runs at 1200mhz when I'm running a game or the browser and it's lagging like crazy then there's a problem.
I already rooted, voided my warranty, tripped my know, and fixed this issue with the xposed module the other user recommended.
Bottom line, unless you void your warranty and install user made mods this phone is a scam, because as soon as it get slightly warm it underclocks like crazy causing lag and horrible performances. There should be lawsuits up the ass about this. Users shouldn't accept having their phone arbitrarily underclocked for no reason like this.
Click to expand...
Click to collapse
Sorry to say but I only play cards game so I am not any concerned or bored by this issue.
I bought this phone as a phone not as a playstation 9.

lolo9393 said:
Sorry to say but I only play cards game so I am not any concerned or bored by this issue.
I bought this phone as a phone not as a playstation 9.
Click to expand...
Click to collapse
You bought a 500 bucks, flagship, quad core, 1080p, multimedia focused smartphone to use as a "phone"? Maybe a Nokia 3310 and a deck of cards would have been a better investment for you.

MarkMRL said:
You bought a 500 bucks, flagship, quad core, 1080p, multimedia focused smartphone to use as a "phone"? Maybe a Nokia 3310 and a deck of cards would have been a better investment for you.
Click to expand...
Click to collapse
I got all that already from long ago but I wanted to test something more uptodate!!!!
I have decrease the cpu speed to 20 Mhz with success and my battery last more than expected with my old 3310.
I am happy.
Chjeers
PS: I paid 600 Euros not 500 bucks that's a difference!!!!!!

Just stop fighting. Everyone uses his mobile differently and has different needs/expectations -_-
Sent from my GT-I9500 using XDA Premium 4 mobile app

Is my Nexus 6P CPU throttling my app?

Hey guys. I bought the Nexus 6P this week at the same time I finished my new app Face Jacker. The app is quite intensive on the CPU - as it's a camera app and I'm manipulating the pixels from the camera every frame, but something is just not quite right when ran on the Nexus 6P.
I created and tested the app using the Samsung S5 on lolipop which runs the snapdragon 801 cpu. It runs seriously smooth on the S5. I later tested the app on the S7 edge since it was running marshmallow -- again no issues there, app ran silky smooth just like the S5 just as I expected.
Now heres the weird part, I load the app up on the Nexus 6P same day I buy it. The face jacking runs smooth for around half a second before the fps drops from around 28 to 7. Both the nexus 6p and S5 are using the same resolution when running the face jack.
I'm trying to figure out what's causing this serious knock in fps after the first half second... The only thing I can think of is the CPU being throttled. I checked the temps but they around 46 on full load of the app - but this wouldn't be enough to throttle, would it?
The clock speed of one of the cores in the 6P is obviously fast enough to run the algorithm every frame (as it runs fine for first half second) but it takes a serious nose dive for some reason I can't explain.
Does anyone know anything special about the snapdragon 810 cpu? I've read that it can be a beast of a cpu performance wise - but I don't understand why it would run so slower to an older cpu.
Sorry for rambling on, just really stumped with this one and I don't know where to even start to debug this.
I can't post a link to the app since I've just registered to XDA - but if you want to find it, please search Face Jacker in the playstore - it's the one with the purple icon.

commanderprompt said:
Hey guys. I bought the Nexus 6P this week at the same time I finished my new app Face Jacker. The app is quite intensive on the CPU - as it's a camera app and I'm manipulating the pixels from the camera every frame, but something is just not quite right when ran on the Nexus 6P.
I created and tested the app using the Samsung S5 on lolipop which runs the snapdragon 801 cpu. It runs seriously smooth on the S5. I later tested the app on the S7 edge since it was running marshmallow -- again no issues there, app ran silky smooth just like the S5 just as I expected.
Now heres the weird part, I load the app up on the Nexus 6P same day I buy it. The face jacking runs smooth for around half a second before the fps drops from around 28 to 7. Both the nexus 6p and S5 are using the same resolution when running the face jack.
I'm trying to figure out what's causing this serious knock in fps after the first half second... The only thing I can think of is the CPU being throttled. I checked the temps but they around 46 on full load of the app - but this wouldn't be enough to throttle, would it?
The clock speed of one of the cores in the 6P is obviously fast enough to run the algorithm every frame (as it runs fine for first half second) but it takes a serious nose dive for some reason I can't explain.
Does anyone know anything special about the snapdragon 810 cpu? I've read that it can be a beast of a cpu performance wise - but I don't understand why it would run so slower to an older cpu.
Sorry for rambling on, just really stumped with this one and I don't know where to even start to debug this.
I can't post a link to the app since I've just registered to XDA - but if you want to find it, please search Face Jacker in the playstore - it's the one with the purple icon.
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It's most likely throttling. From my experience 46°C would easily be enough for the CPU to start throttling back, and even dropping cores completely, in order to control the heat that's generated by this chipset.

Heisenberg said:
It's most likely throttling. From my experience 46°C would easily be enough for the CPU to start throttling back, and even dropping cores completely, in order to control the heat that's generated by this chipset.
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Thanks Heisenberg. Didn't realise that 46°C would be enough to cause throttling.
So before I start changing my algorithm - is there any way to bypass this throttling? I read somewhere that Marshmallow causes the throttle -- is this correct?
It's quite frustrating as the device gets warmer using other less intensive apps!

commanderprompt said:
Thanks Heisenberg. Didn't realise that 46°C would be enough to cause throttling.
So before I start changing my algorithm - is there any way to bypass this throttling? I read somewhere that Marshmallow causes the throttle -- is this correct?
It's quite frustrating as the device gets warmer using other less intensive apps!
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It isn't isolated to a specific Android version (it happens on this phonon LP and M), it is specific to the Snapdragon 810 chipset though. The throttling occurs at a kernel level so to change it you'd need root access and a kernel tweaking app to stop throttling from occurring. Or you could build a kernel that doesn't throttle. But that would need to happen on each device, so it isn't a realistic option for getting the app to work properly.

Heisenberg said:
It isn't isolated to a specific Android version (it happens on this phonon LP and M), it is specific to the Snapdragon 810 chipset though. The throttling occurs at a kernel level so to change it you'd need root access and a kernel tweaking app to stop throttling from occurring. Or you could build a kernel that doesn't throttle. But that would need to happen on each device, so it isn't a realistic option for getting the app to work properly.
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Cheers Heisenburg. Reckon I gotta either offload to the GPU or change the algorithm altogether!