Database Users

2nd Core App Questions

so now that the latest beta of siyah kernel supports enabling/disabling of the 2nd core, and tegrak already released an app for it, i just want to know the possible effects in performance/battery if you use the different options of the 2nd core app.. especially when we use the single core option.. so what will happen to our phone when we run HD games, and im sure that it will extend the battery life, just not sure how the phone will behave with only 1 core running.. and will it be bad for our phone to only run at a single core..
and also, am i right to assume that our phone has the option "dynamic hotplug" by default?

Shouldn't see much of a decrease in the performance. The sgs has a single core yet the cpu can still handle anything thrown against it. Point being there is nothing out that demands dual core performance. On another note note, hd games are not actually gd. It is just advertising point for game developers.
$1 gets you a reply

Using one core instead won't break your cpu. It gonna make your phone cooler ( ! core is running producing less heat and the heat dissipator is made for the dual core ) and have a better battery life obviously. It will, obviously too, slow down your phone, but the speed lost is to be determined. You might want to test it out to see if it's getting laggy or simply suck. As already said, the SGS I has a 1Ghz proc and can handle most of the top recent content available so with a 1.2 Ghz single core, you should be able to handle everything available, specially with an optimized kernel like siyah. And you are right, the default mode is dynamic hotplug, which use both core when needed and turn the core 1 ( 2nd core ) off when not needed.

I tried playing a little with it. The overall smootness doesn't change and i get about the same fps in nenamark2. The only game i saw stuttering a little more in single mode was Shadowgun, the others are just the same. I also have the feeling that cpu noise is reduced while playing music through headsets when you run on single.

I like the idea of switching off one core. But while using only one core this leads to a higher load on that corse. This will result in higher frequencies an thus higher battery consumption?
So might using only one core even be worse for battery life?
I mean isn't that the reason why you use multiple cores? That one does not have to produce cpu with high frequencies? I think I once read that the energy a cpu uses it proportional to the frequency squared. So it is not a linear relation. That means two cores on 500 MHz are using less power than one cpu on 1000 Mhz. Can someone confirm that? So if th os is optimized for multiple cores the energy consumptions will be less.
What do you think or know about Android. Is it managing two cores intelligently an thus reducing energy consumption or are we doing better with switching off one core?

Hi,
is anybody out there who can share any experiences with this 2nd Core app?
It would be very interesting whether it really saves battery(and if yes, is it noticeably or is it a huge difference)? Are there any negative effects in speed oder stability?
Rgds

I don't particularly care about potential battery saving, but I use it to manually disable one core while playing games which have problems with SoundPool ( see http://code.google.com/p/android/issues/detail?id=17623 ), such as Galcon, as this mitigates the problems.

Schindler33 said:
I like the idea of switching off one core. But while using only one core this leads to a higher load on that corse. This will result in higher frequencies an thus higher battery consumption?
So might using only one core even be worse for battery life?
I mean isn't that the reason why you use multiple cores? That one does not have to produce cpu with high frequencies? I think I once read that the energy a cpu uses it proportional to the frequency squared. So it is not a linear relation. That means two cores on 500 MHz are using less power than one cpu on 1000 Mhz. Can someone confirm that? So if th os is optimized for multiple cores the energy consumptions will be less.
What do you think or know about Android. Is it managing two cores intelligently an thus reducing energy consumption or are we doing better with switching off one core?
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totlly agree

[Q] Best Batter on x86

I have a Samsung Series 7 Slate and it doesn't have great battery life using common settings. I have been able to get relatively decent (for x86) battery life out of it by tweaking power settings. I set the max processor to 75% (it is a 1.5GHz Core i5 2nd gen) and the GPU to highest energy savings (integrated HD 3000).
Because Windows 8 runs on ARM and the majority of the apps I use ALSO run on ARM, I was wondering if I should fiddle with the max processor and GPU settings for even better battery life? I really haven't seen much of a comparison of the Core series with ARM (typically one sees Atom comparisons) and I am thinking that since ARM is not as powerful as x86, I don't need to run my CPU as high to get good performance in Windows 8 apps.
Should I be scaling my processor back even more and ramping GPU performance higher to match ARM specs or will it even matter much?

Sony experia Z ONLY QUAD-CORE 1.5GHZ ??

So I've been noticing somethin strange other then the experia z every single other high end device that will come out as of 2013 will be using a 1.7GHZ snapdragon the only high end device that will use a lower one is experia z why????? I mean the phone hasn't come out yet can't they just put the 1.7GHZ instead? why use a lower one 1.5GHZ from phones of the fourth quarter of 2012 its old tech!!!
Sent from my SCH-I510 using xda app-developers app

Calm down man, 1.5GHz quadcore is good for Android. Android really doesn't need such a high speeds
And CPU clock doesn't mean smoother device
Sent from my LT26i using xda app-developers app

1.5Ghz Quad Core is not "only". And they all use exactly the same CPU which operates with 1,5-1,7Ghz speed. Clock speed isn't everything. Look at the iPhone - it uses dual core 1.2Ghz CPU - yet its performance is 5 times smoother than most quad core devices...
Dual core is more than enough for anything a smartphone might need to do - as long as you put good software on it.

gabrielpina4 said:
So I've been noticing somethin strange other then the experia z every single other high end device that will come out as of 2013 will be using a 1.7GHZ snapdragon the only high end device that will use a lower one is experia z why????? I mean the phone hasn't come out yet can't they just put the 1.7GHZ instead? why use a lower one 1.5GHZ from phones of the fourth quarter of 2012 its old tech!!!
Sent from my SCH-I510 using xda app-developers app
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Seriously? "Only" on a quad core 1.5ghz CPU for a smartphone? What are you gonna run on your phone that would require you more? Or do you just want your battery to drain more for no possible reasons? Some users even just underclock for the sake of saving battery.
If you ask me I buy this because of the features and the RAM not because of processor clock.
If you ever let me choose I would rather go for a 1ghz dual core processor with 4GB RAM than having a 2ghz quad core processor with 2GB RAM.
The only reason why I would want the Qualcomm S4 Pro processor is because of adreno 320.

A dual core is good enough dude .. this is a quad core lol
Sent from my GT-N7000 using xda premium

No offense but you just sound like your trolling. Same goes for your other thread too

AK4TAY7BEN said:
No offense but you just sound like your trolling. Same goes for your other thread too
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I agree. I think he's trolling.

Riyal said:
Seriously? "Only" on a quad core 1.5ghz CPU for a smartphone? What are you gonna run on your phone that would require you more? Or do you just want your battery to drain more for no possible reasons? Some users even just underclock for the sake of saving battery.
If you ask me I buy this because of the features and the RAM not because of processor clock.
If you ever let me choose I would rather go for a 1ghz dual core processor with 4GB RAM than having a 2ghz quad core processor with 2GB RAM.
The only reason why I would want the Qualcomm S4 Pro processor is because of adreno 320.
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What would be the purpose of 4GB of RAM in a smartphone are you running Photoshop or a VM? Where did this stigma that more cores is equivalent to less efficient power use. More asynchronous cores allow for more accurate scaling of processing power to needs, thus higher power efficiency because the CPU spends less time in higher power states.

REAVER117 said:
What would be the purpose of 4GB of RAM in a smartphone are you running Photoshop or a VM? Where did this stigma that mire cores is equivalent to less efficient power use. More asynchronous cores allow for more accurate scaling of processing power to needs, thus higher power efficiency because the CPU spends less time in higher power states.
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Buddy android runs Dalvik VM and our GPU uses dedicated RAM for processing certain graphic tasks. So yes we are running a VM on our mobile phones.
Also with a proper monitoring app you could see for yourself which uses more and needs more resource here. whether processing or memory.
Didn't you even wonder why our phones consume almost 700mb RAM without even a single foreground application open? Yet it sits idle in a single core and remains in between 400mhz+ to 900mhz?
Also I didn't say that more cores consumes more power in my statement but still since each core requires power to run it should also consume more. Also I didn't mention anything about number of core I was talking about the clocks. Since the higher the clock requires more Amperes. Still underclocking your phone by 500mhz would prolly just save about 2% of your battery anyways.

you don't need higher cpu clock to get a pocket heater for this winter

My Optimus G has the same cpu an the thermal throttling is kikin in pretty fast. This 1.7Ghz S4pro will thermal throttle as fast or even faster, rendering numerical advantage meaningless.
I don't want to feed the troll but I also think dual core is good enough.

Riyal said:
Buddy android runs Dalvik VM and our GPU uses dedicated RAM for processing certain graphic tasks. So yes we are running a VM on our mobile phones.
Also with a proper monitoring app you could see for yourself which uses more and needs more resource here. whether processing or memory.
Didn't you even wonder why our phones consume almost 700mb RAM without even a single foreground application open? Yet it sits idle in a single core and remains in between 400mhz+ to 900mhz?
Also I didn't say that more cores consumes more power in my statement but still since each core requires power to run it should also consume more. Also I didn't mention anything about number of core I was talking about the clocks. Since the higher the clock requires more Amperes. Still underclocking your phone by 500mhz would prolly just save about 2% of your battery anyways.
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I have yet to see my Xperia ZL have less than 800MB of free an extra 2GB would be a total waste. And you simply stated you'd rather have a dual than a quad, peak frequency means very little except for potential processing power. Just because your CPU is capable of a higher clock speed doesn't mean it will idle any higher. Likewise the only difference between a quad with a single utilized core and a dual with a single utilized core is the minute amount if extra leakage current for the quad.
I think you meant to say that higher frequencies may need more voltage, amperage has very little to do with CPU frequency scaling.
And obviously the memory overhead for a virtualized process i.e. Dalvik VM is not even in the same league as a system VM.

REAVER117 said:
I have yet to see my Xperia ZL have less than 800MB of free an extra 2GB would be a total waste. And you simply stated you'd rather have a dual than a quad, peak frequency means very little except for potential processing power. Just because your CPU is capable of a higher clock speed doesn't mean it will idle any higher. Likewise the only difference between a quad with a single utilized core and a dual with a single utilized core is the minute amount if extra leakage current for the quad.
I think you meant to say that higher frequencies may need more voltage, amperage has very little to do with CPU frequency scaling.
And obviously the memory overhead for a virtualized process i.e. Dalvik VM is not even in the same league as a system VM.
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Buddy that 800mb is without running any foreground applications other than either Settings app or the homescreen. Like I said try running some monitoring apps on the background and try using the browser then maybe try loading some sites with lots of javascript codes in it.
Or if you like try launching 4 types of angry birds and the 2 temple run games simultaneously without killing one of them and let's see if OOM doesn't kick in and kill any of them.
Regarding CPU cores please state something that requires a quad core processor. The smoothness of the UI your experiencing is because of the type of processor your phone is using "The Snapdragon S4 Pro" even if you disable all the extra cores in it you won't feel anything different unless of course you'll run some benchmark tools or video decoding stuffs in there.
And just FYI more cores doesn't mean greater processing power. It's more cores = more processes it can handle.
And on the CPU freq clocks who said t that amperes doesn't increase on each frequency table? Please take a look at qualcomm's document on their site regarding it's processors so you would know how they calculate it. Voltage is just used to provide more electricity to power up the processor but voltage alone won't make a processor active.

This discussion is going to the wrong way.
Thread closed.

My ze551kl Asus zenfone 2 laser's octa core isn't working correctly..

So as you can see by these screenshots only 4 of my eight cores are working.. Is there any way to fix this??
(Here's the album i mgur. c 0 m/ a /2FWDH
Any help would be extremely appreciated..

gyropepsi said:
So as you can see by these screenshots only 4 of my eight cores are working.. Is there any way to fix this??
(Here's the album i mgur. c 0 m/ a /2FWDH
Any help would be extremely appreciated..
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What makes you think that only 4 cores are working?
I don't know in the Android world, but in PCs the applications must be written expressly to use more than one core. And the SD 615 has 4 cores that runs at 1.7 MHz max and the other 4 at 1.0 MHz max, but the frequencies could be lowered by phone makers to increase battery duration.

BubuXP said:
What makes you think that only 4 cores are working?
I don't know in the Android world, but in PCs the applications must be written expressly to use more than one core. And the SD 615 has 4 cores that runs at 1.7 MHz max and the other 4 at 1.0 MHz max, but the frequencies could be lowered by phone makers to increase battery duration.
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Yeah but I had my phone on performance mode and it's using half of the cores, if the other 4 max at 1.0mhz then why are all games that I play (3D Wise) are slow? Is there any way I could fix it? Could overclocking via CPU managing apps (using root,) work in my situation?

gyropepsi said:
Yeah but I had my phone on performance mode and it's using half of the cores, if the other 4 max at 1.0mhz then why are all games that I play (3D Wise) are slow? Is there any way I could fix it? Could overclocking via CPU managing apps (using root,) work in my situation?
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Four cores are high-performance, and four cores are low-power. The performance cores suck up a lot of battery, so not for use with background tasks. The low-power cores are useless for pretty much anything but background tasks, so they're not for use with gaming, etc. The fact that your apps are only using four cores is normal.
Also, as for your gaming performance, I've actually done some testing on this and it turns out that on the ZE551KL, the GPU is way underpowered. No amount of overclocking can fix the abysmal GPU performance on the ZE551KL. This doesn't seem to happen on other models, either, so... yeah.

@gyropepsi: yes, that's correct, the eight cores are not "equal". You have four cores for general CPU use and another four for higher CPU use. They cannot be used in the same time, they get switched to save power. It's actually called "dual quad-core".
https://www.qualcomm.com/documents/snapdragon-615-processor-product-brief
Other manufacturers have one core for low processing and four for high processing. Those phones are doing great in tests but they really suck in daily usage.
@sensi277: I would't say abysmal performance, but yes, it seems to be lower than the Selfie in some tests. However it moves VERY good for a phone, 3D tests on phones are just for kids, to brag about their phones. Nobody does real gaming on a phone.

SoNic67 said:
@sensi277: I would't say abysmal performance, but yes, it seems to be lower than the Selfie in some tests. However it moves VERY good for a phone, 3D tests on phones are just for kids, to brag about their phones. Nobody does real gaming on a phone.
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?
Except, I do real gaming on my phone. Or at least, I try to. Laser GPU holds back most games, though.

Why? You don't have a laptop, desktop? Phone gaming experience is horrid no matter what. No good controls, no immersion...
Sent from my ASUS_Z00TD using Tapatalk

Here is some info about big.LITTLE processing:
https://www.arm.com/products/processors/technologies/biglittleprocessing.php
Sent from my ASUS_Z00TD using XDA-Developers mobile app

Big Core are "stopped"

hi
i am new but i cant find a way for see the firtst 1,5 ghz cores work....all cpu app i can find see me only work the last 4 core with 1,2 ghz...
please help me unlock the firt 4 core are everytime stopped thnx for help

Those kick in only when you are doing something "hard" in that time. Like benchmarking in background.

SoNic67 said:
Those kick in only when you are doing something "hard" in that time. Like benchmarking in background.
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i try run all test and i dont see one time the big core work, they are stopped every time...( try pc mark but dont work he crash after 4k encoding video) with kernel auiditior i can active all 8 core...now they work everytime and i can set governor for each processor...
but other app like cpuz dont find the first processor they see only the last 4 core... ok maybe with bench i can see all cores work but is very hard find a way for check the correct work for governor and the phone processor work fine....
if u dont have root cpu app dont find any governor...or see only one processor...

Those are limitations of the apps themselves or your OS.
I have the official N (rooted with ElementalX) and CPU-Z sees all the cores.
Also there are never supposed to work all 8 in the same time, only a group/cluster of 4 at one time, it is not a straight-up 8 core CPU. They are not "equal" in respect of performance: https://en.wikipedia.org/wiki/ARM_big.LITTLE
Different combinations of Governors and Schedulers produce different results.
PS: The newer Snapdragon 625, that is present in G5 Plus, is listed as a true 8 core: https://www.qualcomm.com/products/snapdragon/processors/625

The 617 is a big.LITTLE octa-core, not a true 8-core CPU such as the 625, like @SoNic67 said. The 617 has one cluster running up to 1.5-1.6 GHz (depending on the kernel), and one cluster that generally runs from 500 MHz-1200 MHz.
The little cluster, or the 500-1200 MHz cluster, is fine for basic tasks, such as UI, scrolling, etc. However, in games, all cores will online (or at least that's the point). Some apps are not threaded for 8 cores and thus will not utilize, or need, 8 cores.
Also, in reality, the 4 "big" cores make very little difference in terms of performance. I did 2 benches in another thread, where Antutu came up 40K with 4 cores and 45k with 8 cores. Although this seems like a large performance decrease, without the big cores the phone was cool, still ran quick, and drained far less battery.
Finally, having 8 cores also can introduce performance deficits as well, especially if your hotplug is inefficient (there may be delays in turning on cores, resulting in UI jank). I thus recommend simply leaving them off- better battery, cooling, and still decent performance.

thx for support and continue OS is amazing gw.
negusp said:
The 617 is a big.LITTLE octa-core, not a true 8-core CPU such as the 625, like @SoNic67 said. The 617 has one cluster running up to 1.5-1.6 GHz (depending on the kernel), and one cluster that generally runs from 500 MHz-1200 MHz.
The little cluster, or the 500-1200 MHz cluster, is fine for basic tasks, such as UI, scrolling, etc. However, in games, all cores will online (or at least that's the point). Some apps are not threaded for 8 cores and thus will not utilize, or need, 8 cores.
Also, in reality, the 4 "big" cores make very little difference in terms of performance. I did 2 benches in another thread, where Antutu came up 40K with 4 cores and 45k with 8 cores. Although this seems like a large performance decrease, without the big cores the phone was cool, still ran quick, and drained far less battery.
Finally, having 8 cores also can introduce performance deficits as well, especially if your hotplug is inefficient (there may be delays in turning on cores, resulting in UI jank). I thus recommend simply leaving them off- better battery, cooling, and still decent performance.
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