Related
Heya All. So far Im running a Milestone 1 (Single Core, 600Mhz) - so Im used to my phone being kinda slow.
My question would be if you could simply switch of 1 - 3 cores on the nexus or simply tell the OS to not utilize them.
In my theory the phone should still be fast enough to handle most of the tasks, but saving battery.
Question 1: Do you think that's possible?
Question 2: Do you think that would save battery?
I guess it would save battery, although the last working core would have to do more work.
Any answers / ideas are welcome =)
Android does that by him self.
Also every (4) cores runs on 15-20% eats less power than one core to maxs.
Sent from my LT26i
Yeah, but don't you think that 1 core at 100% is better in terms of efficiency than 4 cores at 25% ?
Titan2189 said:
Yeah, but don't you think that 1 core at 100% is better in terms of efficiency than 4 cores at 25% ?
Click to expand...
Click to collapse
No, the opposite is true. It is more efficient to power 4 cores at 25% than one at 100%.
Of course efficiency depends on the SoC used, in this case the S4 is highly efficient.
Titan2189 said:
Yeah, but don't you think that 1 core at 100% is better in terms of efficiency than 4 cores at 25% ?
Click to expand...
Click to collapse
Basically CPU can process only one task at time. If you have four CPUs (4 cores) you can process 4 task at the same time.
Titan2189 said:
Heya All. So far Im running a Milestone 1 (Single Core, 600Mhz) - so Im used to my phone being kinda slow.
My question would be if you could simply switch of 1 - 3 cores on the nexus or simply tell the OS to not utilize them.
In my theory the phone should still be fast enough to handle most of the tasks, but saving battery.
Question 1: Do you think that's possible?
Question 2: Do you think that would save battery?
I guess it would save battery, although the last working core would have to do more work.
Any answers / ideas are welcome =)
Click to expand...
Click to collapse
1. Yes, technically speaking it's possible - but you won't be able to do it with stock ROM.
2. No. I doubt that. If you use one core and the core gets overheaded due to high load, then it's the opposite of energy saving. Don't bother tinker to much with core scheduling, since such tasks are buried deep in the US kernel. There've been tons of research putting into how to utilize multicore systems effectively, and as a user I would advise against tinkering with such low-level management. My point is, are you sure you can do it better than hundreds (or thousands) engineering hours spending on the kernel?
Epic
This is exactly what I'm gonna do.
I can live with a wee bit of slowness as long as the battery live is long enough.
So I'll undervolt and underclock as much as possibe... 800 mhz are sufficient for me.
And the ability to clock up whenever I need to...
I was planning to underclock too - probably to around 1Ghz.
Underclocking is different from core scheduling. Under locking definitely saves battery , though it comes with performance trade off. However, disabling cores randomly WILL NOT save battery and probably do the opposite.
I guess some people can tinker the kennel to try optimize the scheduling. But that's the job of developers, I'm against users venturing into such areas
Sent from my Galaxy Nexus using Tapatalk 2
You have to be careful though with underclocking...
Although your CPU is slower, it also takes more clock cycles to complete! So don't go throwing it into 200Mhz range lol.
In the overclocking world though, you can OC a LOT higher on one core, but that's about all you get from disabling other CPU's
Hi, I am trying a lot of different modded kernels for my brand new Nexus 4. However, due probably to the fact that I am not competent enough to look at the code of the patches they apply I have difficulties in understanding some technical differences between them. In particular:
1) It seems to me that some kernels use only some of the four cores of the processor. Namely, I have noticed that Franco kernel uses only two cores, while Trinity hotlplugs all of them when needed. Is there some evidence in support of one or the other choice? How the other kernels behave under this point of view?
2) There seems to be a huge difference for what concerns the time spent by my device in so-called "deep sleep". E.g. when I use Trinity the device, looking at the stats, seems to stay in deep sleep for almost all the time in which the screen is off, while in Franco this happens for a shorter time and in Matrix kernel almost never. However, this seems to have a negligible impact on battery life: e.g. with Matrix the processor is most of the time at the lowest frequency instead of deep sleep, but I get excellent battery life nonetheless. So I wonder if I should care about deep sleep at all.
Thanks in advance for any clarification.
patroclo7 said:
Hi, I am trying a lot of different modded kernels for my brand new Nexus 4. However, due probably to the fact that I am not competent enough to look at the code of the patches they apply I have difficulties in understanding some technical differences between them. In particular:
1) It seems to me that some kernels use only some of the four cores of the processor. Namely, I have noticed that Franco kernel uses only two cores, while Trinity hotlplugs all of them when needed. Is there some evidence in support of one or the other choice? How the other kernels behave under this point of view?
2) There seems to be a huge difference for what concerns the time spent by my device in so-called "deep sleep". E.g. when I use Trinity the device, looking at the stats, seems to stay in deep sleep for almost all the time in which the screen is off, while in Franco this happens for a shorter time and in Matrix kernel almost never. However, this seems to have a negligible impact on battery life: e.g. with Matrix the processor is most of the time at the lowest frequency instead of deep sleep, but I get excellent battery life nonetheless. So I wonder if I should care about deep sleep at all.
Thanks in advance for any clarification.
Click to expand...
Click to collapse
1) Franco kernel doesn't only use two cores. You can select 2 or 4 cores and hot plug via his app or script.
2) yes you should care about deep sleep, of anything it will provide batter idle battery life by a small margin
Sent from my Nexus 4 using Tapatalk 2
Vanhoud said:
1) Franco kernel doesn't only use two cores. You can select 2 or 4 cores and hot plug via his app or script.
2) yes you should care about deep sleep, of anything it will provide batter idle battery life by a small margin
Click to expand...
Click to collapse
Thanks for your reply. About 1), I meant to say that it uses two cores by default. What is the advantage in being restrained to use only half the power at disposal instead of using time by time what is needed?Am I right in thinking that in this way always the same two cores are used while the two others stay virgin? Or is there some kind of rotation, so that in each moment at most two are used but not always the same two?
patroclo7 said:
Thanks for your reply. About 1), I meant to say that it uses two cores by default. What is the advantage in being restrained to use only half the power at disposal instead of using time by time what is needed?Am I right in thinking that in this way always the same two cores are used while the two others stay virgin? Or is there some kind of rotation, so that in each moment at most two are used but not always the same two?
Click to expand...
Click to collapse
In franco kernel, hotplug is usually the default.
In hotplug mode, the default is set so that when there is minimal activity only the first two cores are active. This is to save battery and reduce heat i am assuming. When the cpu load increases, the 3rd and 4th core are activated to assist.this is also helpful in reducing the amount of times each cpu core turns on/off (i.e. hot plugging) because this action has an impact on performance. The first two cores stay on constantly until the load increased, then cpu 3 and 4 are activated . Once the cpu load falls down, 3/4 are turned off
when in dual core mode, yes only two cores are used period. You really cant even tell a difference when only using two cres, except for heavy gaming.
Quad core mode makes all the cores active all the time, best for gaming
Quad isn't always needed...Many android apps aren't even multi threaded so having every core on is foolish.
Sent from my Nexus 4 using xda app-developers app
by default, the device hotplugs. itll use the number of cores it needs when it needs them. you can set yourself how many cores the device can use as a minimum(with root). i use trinity, and i usually set that all four cores are used all the time. i see slightly better battery life that way.
you will see better idle battery drain the better the device deep sleeps. btw battery life is all dependent on how you use the device. if youre one of those people that barely touch your device, and let it lay around for log periods if time, then a deep sleeping device would be beneficial to you. if youre a power user thats constantly using the device nonstop then it wouldnt make any difference to you. most of us fall in between these two types of users
Hello,
I have a peculiar problem with my OnePlus Two
The faster A57 cores don't get activated, I have tried using Antutu, played Asphalt 8 And NFS NL for hours.
But the cores just won't get triggered
I'm using A1 CPU tool to monitor the same.
Even CPU Z wouldn't show me any activity on the other 4 cores while Antutu was running.
Any ideas? It's brand new can be returned
Oxygen OS - 2.1.1
A2003_14_151011
Sent from my C6602 using XDA Free mobile app
Denhot said:
Hello,
I have a peculiar problem with my OnePlus Two
The faster A57 cores don't get activated, I have tried using Antutu, played Asphalt 8 And NFS NL for hours.
But the cores just won't get triggered
I'm using A1 CPU tool to monitor the same.
Even CPU Z wouldn't show me any activity on the other 4 cores while Antutu was running.
Any ideas? It's brand new can be returned
Oxygen OS - 2.1.1
A2003_14_151011
Sent from my C6602 using XDA Free mobile app
Click to expand...
Click to collapse
I just installed A1 CPU to verify your issue.
It shows cores 0,1,2,3,4 are used at 1344ghz for me as well.
When i check with synapse (i'm on AK kernel) it shows all cores are used.
I guess it's a limitation with A1 CPU tool. Try with other tool that supports such architecure.
I was sceptical on the same but, out of the box I remembered seeing 1777 MHz frequencies.
Thanks a lot
I shall try more tools and get back.
Though I think if you're on a different kernel and had the A1 CPU tool been correct it would be redundant, Because core allocation would be done on kernel level (in my knowledge).
Sent from my iPad using Tapatalk
I know that it was already discussed but maybe someone has found a solution.
The problem is that performance of device gradually decreases proportionally to the level of the battery.
For example:
- battery is 90%, Real Racing 3 runs perfectly,
- battery is 45%, some lags appear during gameplay
- battery is 10%, heavily FPS drop, almost impossible to play
Battery saver is turned off, device is cold in all tests.
If I would like to save my battery level - I will turn on battery saver manually,
but I WANT to have good game experience not depending on battery level
This is really crazy.
Tested on stock OOS 2.1.1, with stock kernel, with Boeffla an AK, tested on Exodus ROM - everywhere I can see this weird behaviour.
May be some system files must be edited to overcame this issue?
jemcik said:
I know that it was already discussed but maybe someone has found a solution.
The problem is that performance of device gradually decreases proportionally to the level of the battery.
For example:
- battery is 90%, Real Racing 3 runs perfectly,
- battery is 45%, some lags appear during gameplay
- battery is 10%, heavily FPS drop, almost impossible to play
Battery saver is turned off, device is cold in all tests.
If I would like to save my battery level - I will turn on battery saver manually,
but I WANT to have good game experience not depending on battery level
This is really crazy.
Tested on stock OOS 2.1.1, with stock kernel, with Boeffla an AK, tested on Exodus ROM - everywhere I can see this weird behaviour.
May be some system files must be edited to overcame this issue?
Click to expand...
Click to collapse
Hi Jemcik, hi Denhot!
I'm facing the same issues on my new device and it's definately not normal!
With a battery level of 19% I was not able to get the 4 A57 cores online, which results in lower system performance. Have you found a solution?
@Denhot!
Maybe we should rename the thread into: IS OPT PERFORMANCE REALLY DEPENDENT ON BATTERY STATUS AND IS IT A ROM FEATURE OR AN ISSUE!?
I think, one of the kernel devs should be able to answer this question.
ollimi1 said:
With a battery level of 19% I was not able to get the 4 A57 cores online...
Click to expand...
Click to collapse
It looks like some system configuration files with kernels activation policy have to be edited,
but I haven't found yet which files exactly.
jemcik said:
It looks like some system configuration files with kernels activation policy have to be edited,
but I haven't found yet which files exactly.
Click to expand...
Click to collapse
I've never experienced such a function!
CPU power depending on battery voltage!? 62k with full battery, 49k with 20% battery both with same CPU temps!
Hopefully not a general problem on our side with the motherboard Voltage Regulator or something.
Have you been to a kernel thread and asked this question? If not, I will ask this in AK's kernel thread. Maybe he knows more about it!
The 4 high performance cores will only be activated when needed. What app are you using to check the core usage? Every now and then you should see 2 of the high performance cores sometimes coming to life every now and then, with the other 4 power efficent cores being more busy. Use CPU-Z to check.
Due to the way Oxygen OS's stock kernel works, only 2 of the high performance cores will ever be active, alternating between the 4 cores in an attempt to keep the phone cool and not throttle as often. If you want all 4 high performance cores to be active as well as overclocking it back to its original speeds, you'll need to flash a custom kernel.
jemcik said:
I know that it was already discussed but maybe someone has found a solution.
The problem is that performance of device gradually decreases proportionally to the level of the battery.
For example:
- battery is 90%, Real Racing 3 runs perfectly,
- battery is 45%, some lags appear during gameplay
- battery is 10%, heavily FPS drop, almost impossible to play
Battery saver is turned off, device is cold in all tests.
If I would like to save my battery level - I will turn on battery saver manually,
but I WANT to have good game experience not depending on battery level
This is really crazy.
Tested on stock OOS 2.1.1, with stock kernel, with Boeffla an AK, tested on Exodus ROM - everywhere I can see this weird behaviour.
May be some system files must be edited to overcame this issue?
Click to expand...
Click to collapse
Hi,
would like to share I don't have a similar experience, with NFS NL or Asphalt, phone was consistent with no lags even when it got unbearable to hold.
I as playing and simultaneously screen mirroring over to a TV.
Going from 65 to 25% over a long course.
I normally won't let my battery fall below 20%.
So the thing about Li-ion/pro is that as you go lower voltage decreases so to provide same power draw current increases.
Basically it would heat up faster.
That can be a reason combined with that their might be inbuilt measures to save battery like you said, nor as an engineer I would recommend you to stress your phone at those levels.
I can't explain the lag at 45%, didn't find it might try real racing 3 later to check.
Sent from my iPad using Tapatalk
trapistasajt said:
The 4 high performance cores will only be activated when needed. What app are you using to check the core usage? Every now and then you should see 2 of the high performance cores sometimes coming to life every now and then, with the other 4 power efficent cores being more busy. Use CPU-Z to check.
Due to the way Oxygen OS's stock kernel works, only 2 of the high performance cores will ever be active, alternating between the 4 cores in an attempt to keep the phone cool and not throttle as often. If you want all 4 high performance cores to be active as well as overclocking it back to its original speeds, you'll need to flash a custom kernel.
Click to expand...
Click to collapse
This is consistent with what I've noticed. The time It didn't, a simple reboot helped solve it and it hasn't occurred since.
Also these tools can't monitor the other cores, if you're rooted why not try synapse as helkat suggested
Sent from my iPad using Tapatalk
Denhot said:
This is consistent with what I've noticed. The time It didn't, a simple reboot helped solve it and it hasn't occurred since.
Also these tools can't monitor the other cores, if you're rooted why not try synapse as helkat suggested
Sent from my iPad using Tapatalk[/QUOTE
Thanks man!
I know how the S810 should work!
But I thought the performance issues have only to do with the temps. But now it seems it have also to do with the battery level.
It would be good if someone tries to reproduce the following to verify it:
1. One run Antutu benchmark with fully charged battery and room cool temps.
To be sure the conditions are the same, shut the display off for one or two minutes, than start display again, kill all recent apps and run Antutu test and note the results.
2. Than wait or do something until your battery is down to 20%, shut the display off for the same time, kill recent apps and start Antutu test run again and compare the results.
I've also tried the same after a reboot, with always the same results.
With 100% I get scores between 60 and 66k and with lower capacity (20%) I get only 48 till 50k!
I am not interested about the benchmark results, but I need to know if this only occurs on my side.
Click to expand...
Click to collapse
So, guys!
I have tested it the last few weeks and it is a fact that the performance in benchmarks is dependent by the battery level.
We have tested it with 3 devices and it is always the same.
But thank God, it seems on the devices perfomance themselves (in apps/ui) this has no effect!
But each one can replicate this behavior very easy!
ollimi1 said:
Hi Jemcik, hi Denhot!
I'm facing the same issues on my new device and it's definately not normal!
With a battery level of 19% I was not able to get the 4 A57 cores online, which results in lower system performance. Have you found a solution?
@Denhot!
Maybe we should rename the thread into: IS OPT PERFORMANCE REALLY DEPENDENT ON BATTERY STATUS AND IS IT A ROM FEATURE OR AN ISSUE!?
I think, one of the kernel devs should be able to answer this question.
Click to expand...
Click to collapse
I have the same issue! When battery level goes lower than 20%, my A57 kernels become offline. I checked this with CPU-Z and PerfMon. And this is the same on stock or custom kernel. Now I am using Boeffla kernel. The most frustrating is that my UI suffer from this. I have lot of lags in simple apps, such as calculator or some messengers.
Same issue here, there are threads in one plus forums.
I think the threashold level is at 40 % ?? They made this to keep the battery up. You can also see faster battery drop till the 40-30% mark then it is harder to kill the battery.
I am also dissapointed in this, maybe we can search the kernel sources ? Or is there a daemon app that triggers this?
I received the phone with 20%-30% battery, started an antutu knowing how powerfull 810 chip is, then boom 45k same as the previos phone i had with 801 chipset...i was like what the fxck....runing antutu again with full battery - 66k.
well i have run benchmark in back ground with few game and apps .. and checked with cpuz max that i have notice was around 50-60% cpu load still 2 off those a57 cores were off using this device for 2-3 days it always turns off 2 cores for me rest 6 is working most of the time :/ Even in battery saver mode .. i am not sure if this is a cpuz issue as i have not rooted my device yet so cant say properly ..
Also i face some freq. benchmark issue like in benchmark it scores around single core - 690 multicore - 2.6K .. and if i restarts device it scores normal - 1.1K and 4.5K .. i have no idea whats wrong with this :/
20% Battery Mark
The drop in performance at 20% Battery is standard behavior of the Rom and Stock Kernel. The Big Cluster (A57) is completly shut down to save Battery. If you dont want this you have to use a custom Kernel which is able to switch this Battery saving strategy off. Boeffla Kernel for example can do that.
Read http://www.anandtech.com/show/9828/the-oneplus-2-review/2.
They "optimized" the soc.....
No they just turned off some cores so there is no heat problem.
So I think this is my first and latest oneplus.
they've hit the mark! What the hell, i think they must be sued for false marketing. Its just like buying a car with 400 hp and those hp are only there when i'm parked or listen to music, if i'm on the highway or on the ridge the car has 100 hp...wtf :|
Killer2k8 said:
they've hit the mark! What the hell, i think they must be sued for false marketing. Its just like buying a car with 400 hp and those hp are only there when i'm parked or listen to music, if i'm on the highway or on the ridge the car has 100 hp...wtf :|
Click to expand...
Click to collapse
Calm down lol it's actually good on their part. Shutting down A57 cores on low battery is a good thing because the A53 cores use much lesser battery. If you're out on a trip and have 10% battery, with the A57 cores this will probably drain off within an hour of intermittent usage. When only the A53 cores are active, the battery life will increase greatly.
Companies design phones for average users, not just gamers. If you don't want this feature, root your phone, flash boeffla's kernel and disable the BCL Battery Driver. It's as simple as that
Hey i tried many diffrent rom bui i can only get 2.5h SOT. Which kernel do you use and which rom to get the maximum battery life without lag?
Battery<----------------------------------->Performance
They are at opposite ends. If you want maximum battery life then there no way to avoid lag.
You can completely turn off 2 or 3 cores, leaving you with a single or dual core phone;
You can also underclock and undervolt the remaining cores, reducing power consumption even more.
This is very battery friendly (in theory), but, as I said, it will give you big lags.
I added a rom video review to the help thread. You might want to check it out.
obol2 said:
Hey i tried many diffrent rom bui i can only get 2.5h SOT. Which kernel do you use and which rom to get the maximum battery life without lag?
Click to expand...
Click to collapse
Sounds like you really need a new battery
GDReaper said:
Battery<----------------------------------->Performance
They are at opposite ends. If you want maximum battery life then there no way to avoid lag.
You can completely turn off 2 or 3 cores, leaving you with a single or dual core phone;
You can also underclock and undervolt the remaining cores, reducing power consumption even more.
This is very battery friendly (in theory), but, as I said, it will give you big lags.
I added a rom video review to the help thread. You might want to check it out.
Click to expand...
Click to collapse
Don't mean to troll, but can't help it. Turn a quad core cpu into a dual core? Really?!
Erm... ok.
thundastruck said:
Don't mean to troll, but can't help it. Turn a quad core cpu into a dual core? Really?!
Erm... ok.
Click to expand...
Click to collapse
Do you have any better ideas on how to increase battery life?
Cores need power to run. Turning them off is a completely logical option.
You really don't need all the cores for most tasks. You can browse Facebook, or whatever, just fine with only two cores.
I am currently running in dual-core mode with max cpu frequency at 1.2 GHz and it still is smooth.
GDReaper said:
Do you have any better ideas on how to increase battery life?
Cores need power to run. Turning them off is a completely logical option.
You really don't need all the cores for most tasks. You can browse Facebook, or whatever, just fine with only two cores.
I am currently running in dual-core mode with max cpu frequency at 1.2 GHz and it still is smooth.
Click to expand...
Click to collapse
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
obol2 said:
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
Click to expand...
Click to collapse
Nothing.
Test your battery. Or better yet, start thinking of getting a replacement or a new phone. With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day. Bought a brand new original battery 6 months ago. Smooth sailing. No under-volting, shutting off cores, under-clocking or any crap like that. Phone is custom rom'med and correctly so if I may add.
obol2 said:
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
Click to expand...
Click to collapse
lower values for read ahead cache are more battery friendly.
Also, bfq is considered more battery friendly too.
thundastruck said:
Nothing.
Test your battery. Or better yet, start thinking of getting a replacement or a new phone. With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day. Bought a brand new original battery 6 months ago. Smooth sailing. No under-volting, shutting off cores, under-clocking or any crap like that. Phone is custom rom'med and correctly so if I may add.
Click to expand...
Click to collapse
In two month I will get a new phone. I want to buy the lg v10 but don't know if it is worth or lg g4 / moto x style.
obol2 said:
In two month I will get a new phone. I want to buy the lg v10 but don't know if it is worth or lg g4 / moto x style.
Click to expand...
Click to collapse
Never heard of these models except for lg g4, which was crap imo.
thundastruck said:
With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day
Click to expand...
Click to collapse
You are aware that he said 2.5h SOT, "screen on time" ?
That means that after using it for an entire day or two, the combined time of the screen being on is 2.5 hours, and in my opinion that is not really bad.
The screen is always the culprit when it comes to power consumption, and in a phone with a battery that doesnt exeed 2000mah its just natural
that after about 2-3 hours of the screen being on the little battery is empty, and no ammount of undervolting will extend that significantly.
The only thing he can consider to increase SOT is a bigger battery, if he doesnt mind the bigger bulge at the back.
Backe888 said:
You are aware that he said 2.5h SOT, "screen on time" ?
That means that after using it for an entire day or two, the combined time of the screen being on is 2.5 hours, and in my opinion that is not really bad.
The screen is always the culprit when it comes to power consumption, and in a phone with a battery that doesnt exeed 2000mah its just natural
that after about 2-3 hours of the screen being on the little battery is empty, and no ammount of undervolting will extend that significantly.
The only thing he can consider to increase SOT is a bigger battery, if he doesnt mind the bigger bulge at the back.
Click to expand...
Click to collapse
Had no idea - never really cared what SOT stands for anyway! But thanks for clearing that up. Always had satisfactory battery life on my S4. The few times I didn't was when a rom on my phone went bad & subsequently had to flash another.
So if what you say is true regarding a day or 2 battery life, then what is this chump complaining about? Turning water into wine? :silly:
So @GDReaper idea is right!I currently am on crDroid and when I switch off 2 or 3 cores the phone is as fast as it was and the battery lasts a little bit longer..With normal charging it goes to full for about 1 hour and half and without using it the batttery lasts 1-2 days,using it lasts about 3 hours or 4.I flashed a new kernel and turned on fast charging on Kernel Adiutor,now the phone charges full for about 45 minutes and lasts same! I'm very happy with my battery bcs I haven't changed it since I got the phone!
Most people say that A57 cores are disabled on MM. But it isnt True. As you can see on screenshots, they are working. Please post screenshot from cpu-z on android N.
It's not disabled completely, they become active as needed when temp is under control for them to be active.
how is the temp and battery in N
read
pou_gh2 said:
how is the temp and battery in N
Click to expand...
Click to collapse
Very Good.
I hope so. I don't really wanna update if the A57 cores don't work.
They are not stop on Mm but Android N
It is true that the cpu changed Android N to Quad core???
They totally ruined Device by pushing such update ????
I'd rather belive it's cpu-z problem, because antutu score did not change after upgrading to 7.0.
S1gma said:
I'd rather belive it's cpu-z problem, because antutu score did not change after upgrading to 7.0.
Click to expand...
Click to collapse
Nope... It's Absolutely true.. 4 cores got disabled and working cores got underclocked to 1.5ghz
Don't belive the're underclocked. A53 cores runs at 1,5ghz as they should. We just don't have any app that can read actuall clock speed of A57 cores. But if they're disabled, I should not get any cpu usage on them. And I'm getting cpu usage on them!
What more, why we have the same benchmark scores as in Marshmallow?
Did anyone test this on lollipop? The cores themselves may not be disabled but I did notice their lack of use, no matter what game or app I use the 4 extra cores stay at 0 %.
Benchmarks such as atutu maybe specifically written to utilize all cores, but seeing their lack of use in general use is troubling.
As for the downclock the specification for this A57 is 2GHZ according to this.
http://m.gsmarena.com/sony_xperia_z3+-6878.php
And I do remember the clock speed being different in MM.
And there's also this.
https://forum.xda-developers.com/showpost.php?p=62151047&postcount=17
So some downclocking was made.
Edit.
Something worth a note, thou some people may know this already, "Stamina Mode" does seem to hae some effect on CPU usage.
After disabling "stamina mode" or setting it to start when battery is low i started to notice some usage from A57 in general use, where before it was not used at all.
I confirm on Android 7 they are disabled (last update). What the hell is this...
microlynz said:
I confirm on Android 7 they are disabled (last update). What the hell is this...
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Click to collapse
Care to give a prof of this claim?
foxsevent said:
Care to give a prof of this claim?
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Look to this... Idiot phone
microlynz said:
Look to this... Idiot phone
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I wouldn't say that's a proof, the cores may just not be in use atm, care to flash marshmallow or kittkat to test this?
foxsevent said:
I wouldn't say that's a proof, the cores may just not be in use atm, care to flash marshmallow or kittkat to test this?
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Click to collapse
When I flashed Android 6 MM the cores are working and the phone is very stable
microlynz said:
When I flashed Android 6 MM the cores are working and the phone is very stable
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They are not disabled, just in an inactive state ... sleeping.
AttilaGolik said:
They are not disabled, just in an inactive state ... sleeping.
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On Android 7 they never work. They keep on sleeping(or disabled it's the same thing)
microlynz said:
On Android 7 they never work. They keep on sleeping(or disabled it's the same thing)
Click to expand...
Click to collapse
Well to truly test you would have to flash all the way to KK, as supposedly the cores are disabled on both MM and N.
But you are correct it doesn't matter, as the A57 is down clocked to 1.56GHz to match the A53, and the A57 is in constant sleep state, may as well be disabled, even when running full HD games it does nothing, i wiuld mind this that much if it helped to keep the phone cooler but even without the A57 Z3+ is a bloody furnace, 60C degrees on a cold day, when in use just browsing the web.
Did you notice any difference when testing MM and N, lags, slowdowns etc?
How about any benchmarks? in antutu i get from 50k to 80k and i didn't notice all cores being uses when beniching, the only way i ever saw all cores in use is when using a CPU stress app.
If i had to guess i would say that the phone switches between A57 and A53 depending on what you do bu i never noticed CORES 5-7 ever being used.