Develop Bugs

[Q] Is exynos worth buying?

The snapdragon version isn't available in my country, so I will have to buy the exynos (Pretty cheap right now $500 equivalent). The thing is reviews say the snapdragon doesn't lag a bit while exynos is made for a large device.
Is the performance really this bad? I'm not into eons right now by the way.

No its not worth buying the snapdragon version. My s4 is faster than my note...
Sent from my GT-I9505 using xda app-developers app

With HMP enabled there is no comparison between the two, exynos is up to 50% faster and potentially more efficient. With HMP disabled (as things currently are) then qualcomm is the slightly better chip, but I'm not convinced that the difference is enough to prefer one soc over the other...
In short Exynos 5420 is artificially neutered to seem worse than qualcomm, yet -even so- going either way won't make much of a difference...

Do you have any benchmarks to prove your claim of a speed bump of 50 %?
to OP
There are a lot of threads about Exynos vs snapdragon, long story short
Exynos , tad better cpu
Snapdragon tad better gpu
I've had both, ended with exynos , because I didn't need 4g, but needed 32 GB ( in scandinavia 4 G seems to be 16 gb only)
Lag was more or less the same
I felt the battery time on the exynos was a tad better
They felt equally as snappy when they needed to
BUT!!!
App support was a tad better on Snapdragon, ie more apps in the plastore worked with the snapdragon version, a few more games etc... no big deal for me, but still get me ticked of when I noticed a few apps I bought weren't compatible ( yet?!) with the new exynos chip ( but worked with my sammy S3 also exynos chip, older )

Exynos is fine. I've played with both and from a UI and app use perspective you can't tell the difference. Adreno's a bit faster than Mali but no so much as to drastically alter performance. Some games are better optimized for Adreno so depending on your choice of games it could make a difference. As for app compatibility it's more likely the 2,560x1,600 display that's causing the issue not the specific SoC. If there were huge differences between Exynos and S-800 or drastic app performance differences and app compatibility issues it would be all over the N3 forum and it's not.

DeBoX said:
Do you have any benchmarks to prove your claim of a speed bump of 50 %?
to
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Click to collapse
HMP for 8 cores have not yet released but look at Note 3 Neo, it uses 2 less large cores and it posts the same antutu score as our note, so by adding two more large cores you can expect the score to be about 50% more. As I said that is only true were all 8 cores would be used at the same time and they are not throttled (that is why I said "up to").

Stevethegreat said:
Look at Note 3 Neo, it uses 2 less large cores and it posts the same antutu score as our note
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Not really. It also has a 267 PPI display which is benefitting its graphics scores in AnTuTu compared to the SGS4 at 441 PPI and N3 at 386 PPI.
http://www.nairaland.com/1597298/samsung-budget-galaxy-note-neo
S-800 vs. Exynos on the N3...

BarryH_GEG said:
Not really. It also has a 267 PPI display which is benefitting its graphics scores in AnTuTu compared to the SGS4
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Click to collapse
I was more properly referring to CPU scores which are the only ones benefitted from HMP.
I ran a quick AnTuTu (cpu) test to my Exynos 5420 equipped note and here are the results: http://i.imgur.com/zD32DZQ.png
Notice how remarkably similar they are to note neo's cpu score:
http://www.gsmarena.com/showpic.php3?sImg=newsimg/14/01/sgn3n-leak/gsmarena_006.jpg&idNews=7538
Note that note neo has only two large cores which are clocked lower by 10% compared to exynos 5420 and it still posts almost the same score merely by employing the help of the small cores. Now add two large cores more and you'd get 50% more performance, it's simple math really...
Now I'm not saying that it would be a performance that we would actually see in most occasions , it would either be throttled or -even- not supported by most apps but still it's potentially there (which was my point by saying "up to").
What will *definitely* be there if HMP is to be enabled is better battery -though- as it would make more efficient use of the small cores. Since exynos 5422 is also on 28nm yet has HMP enabled leads me to believe that we lack HMP for strategic reasons (so that samsung will sell more exynos 5422 / qualcomm equipped machines)

Stevethegreat said:
I was more properly referring to CPU scores which are the only ones benefitted from HMP.
I ran a quick AnTuTu (cpu) test to my Exynos 5420 equipped note and here are the results: http://i.imgur.com/zD32DZQ.png
Notice how remarkably similar they are to note neo's cpu score:
http://www.gsmarena.com/showpic.php3?sImg=newsimg/14/01/sgn3n-leak/gsmarena_006.jpg&idNews=7538
Note that note neo has only two large cores which are clocked lower by 10% compared to exynos 5420 and it still posts almost the same score merely by employing the help of the small cores. Now add two large cores more and you'd get 50% more performance, it's simple math really...
Now I'm not saying that it would be a performance that we would actually see in most occasions , it would either be throttled or -even- not supported by most apps but still it's potentially there (which was my point by saying "up to").
What will *definitely* be there if HMP is to be enabled is better battery -though- as it would make more efficient use of the small cores. Since exynos 5422 is also on 28nm yet has HMP enabled leads me to believe that we lack HMP for strategic reasons (so that samsung will sell more exynos 5422 / qualcomm equipped machines)
Click to expand...
Click to collapse
You can't divorce the impact of display area size and PPI from CPU performance. The GPU doesn't absolve the CPU's role in graphics output. An i3 PC with a killer graphics card will perform worse graphically than an i7 PC with a lesser card because most computational (not rendering, texture mapping, vectoring, and decoding) work is still done on the CPU. So I have no idea what AnTuTu's testing to come up with a CPU rating in isolation but if it's a real-time performance test the CPU's role in graphics output is impacting it. So comparing the Neo with a 5.5" display and 267 PPI against the N10.1-14 with a 10.1" display and 299 PPI isn't going to get you a relevant CPU comparison. That's why I used the N3 and SGS4 as comparisons because only the PPI is off. And the Neo would be well behind the SGS4 in the cumulative AnTuTu test if it had the same PPI because the lower workload of the lower PPI is artificially enhancing its score. At the end of the day an isolated CPU number is pretty meaningless. It's like bench horsepower in a car vs. horsepower to the wheels. A higher bench rating means nothing because none of us drive an engine, we drive a car. The total AnTuTu number (AKA: drive train loss) is more relevant even though it doesn't support the point you're trying to make about HMP.
http://en.wikipedia.org/wiki/Graphics_processing_unit#Computational_functions

BarryH_GEG said:
You can't divorce the impact of display area size and PPI from CPU performance. The GPU doesn't absolve the CPU's role in graphics output. An i3 PC with a killer graphics card will perform worse graphically than an i7 PC with a lesser card because most computational (not rendering, texture mapping, vectoring, and decoding) work is still done on the CPU. So I have no idea what AnTuTu's testing to come up with a CPU rating in isolation but if it's a real-time performance test the CPU's role in graphics output is impacting it. So comparing the Neo with a 5.5" display and 267 PPI against the N10.1-14 with a 10.1" display and 299 PPI isn't going to get you a relevant CPU comparison. That's why I used the N3 and SGS4 as comparisons because only the PPI is off. And the Neo would be well behind the SGS4 in the cumulative AnTuTu test if it had the same PPI because the lower workload of the lower PPI is artificially enhancing its score. At the end of the day an isolated CPU number is pretty meaningless. It's like bench horsepower in a car vs. horsepower to the wheels. A higher bench rating means nothing because none of us drive an engine, we drive a car. The total AnTuTu number (AKA: drive train loss) is more relevant even though it doesn't support the point you're trying to make about HMP.
http://en.wikipedia.org/wiki/Graphics_processing_unit#Computational_functions
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Click to collapse
Maybe so, but the benchmark in question runs off screen. So while in real life resolution matter in Antutu Cpu score, or super pi , or, or, it doesn't. HMP will make the Cpu 50% faster in multi threaded operations, I never claimed it makes the total machine faster by the same amount. For example an HMP equipped note 2014 will score around 40000 in Antutu , NOT 49500. I don't see where we disagree, I merely think you misunderstood my initial claim

If you live for real world use, the Exynos Note is a wonderful tablet. If you live in the world of needing the highest quadrant and antutu scores you should pass.
Sent via Tapatalk and my thumbs.

Stevethegreat said:
With HMP enabled there is no comparison between the two, exynos is up to 50% faster and potentially more efficient. With HMP disabled (as things currently are) then qualcomm is the slightly better chip, but I'm not convinced that the difference is enough to prefer one soc over the other...
In short Exynos 5420 is artificially neutered to seem worse than qualcomm, yet -even so- going either way won't make much of a difference...
Click to expand...
Click to collapse
How did you enable HMP? My note 3 snap dragon is so much faster than my note.
Sent from my SM-N900T using XDA Premium 4 mobile app

Stevethegreat said:
HMP for 8 cores have not yet released but look at Note 3 Neo, it uses 2 less large cores and it posts the same antutu score as our note, so by adding two more large cores you can expect the score to be about 50% more. As I said that is only true were all 8 cores would be used at the same time and they are not throttled (that is why I said "up to").
Click to expand...
Click to collapse
It will never be released for Exynos 5420 either, unless Samsung want alot of complains about fried Exynos 5420 chipsets. Also they already said it wont release HMP for Exynos 5420 cause of the heat.

dt33 said:
It will never be released for Exynos 5420 either, unless Samsung want alot of complains about fried Exynos 5420 chipsets. Also they already said it wont release HMP for Exynos 5420 cause of the heat.
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Click to collapse
Once again, that's not the reason that they won't release it, if anything the chip would be cooler because more use of A7 cores would be possible and if all 8 cores are needed Samsung could choose to throttle the thing. The reason that they don't release it is the Exynos 5422 which is the same chip but with all 8 cores enabled (also 28nm)...
So no fried socs, lesser profits more like

Why octa-core?

The galaxy tab s products that are available to me have an octa-core processor, with the high speed cores being 1.9ghz. I can't really understand why Samsung chose to use that instead of a 2.3ghz quad-core like in the tab pro.

See Wikipedia for an explanation of the concept: http://en.m.wikipedia.org/wiki/ARM_...multi-processing_.28global_task_scheduling.29

Because the Exynos 5 Octa-core is the one processor that Samsung has to be able to compete with Snapdragon 800, and is cheaper to implement since it's their own processor. I don't buy the Octa-core hype, I'd be happier with the Snapdragon 800 honestly like on the Tab PRO 8.4.

The question is:
Does TAB S use the 8 cores at the same time?
It seams it does NOT, little cores are only used when low power is required..
So performance wise, this CPU is slower than SD 800

ssuper2k said:
The question is:
Does TAB S use the 8 cores at the same time?
It seams it does NOT, little cores are only used when low power is required..
So performance wise, this CPU is slower than SD 800
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Click to collapse
And yet I am getting 35,300 on Antutu using Shaheers t800 rom which is higher than any other current tablet or phone. (Shaheer's rom should go out of beta today - don't flash until final has been posted).
The Tab Pro 8.4 Antutu is 32,806.

I CANT PLAY NOVA 3 with exynos !
AND GAMING IS NOT SO SMOOTH ! STILL A BIT LAGGY

I can see the argument that you don't always need full power, thus the four slow cores, but since all cores can't run at once, it seems a cheat to have 1.9ghz as the top speed for the faster four cores. Since, or at least I assume, cores step up and down as needed, it seems to me a snapdragon 800 or higher at 2.3ghz or higher would have been just fine. I mean, if you are going to put in 3gb of RAM, then you should put in a great cpu also and not pretend less (1.9ghz) is a better contribution to what is supposed to be a premium tablet.

And yet I don't think samsung is doing enough to utilizing this hardware capability. In theory it should run at least 4x faster and 6x more effecient then the snap dragon and apple current A8 chip. It has failed to outshine the competitors because samsung software department sucks. Samsung hardware is still great though.

sku|| said:
I CANT PLAY NOVA 3 with exynos !
AND GAMING IS NOT SO SMOOTH ! STILL A BIT LAGGY
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Click to collapse
Blame the developer for not making it compatible. Tegra powered Htc one x is incompatible too so not sure that is exynos issue..

i wish my t805 had Full HD screen resolution :cyclops:

Funny. Was just browsing the web a bit on my i5 ultrabook and it occurred to me that the browser on my Tab S is actually faster. If gaming is your primary thing, I'd buy the Nvidia Shield, not the Tab S. This tablet is designed for eye candy media consumption (internet and video) not for gaming enthusiasts. Try running your PC video card at 2560 x 1600 on ultra and see what you get.

i had heard from a Samsung rep i actually enjoy talking to that Sammy had just figured the all cores at once and we should see updates that turn that feature on. when this will happen who knows. i also did not ask him for a link and now cant find that info on the web so when i see him again soon i will get more info.
i would assume (insert you know what that means) that when/if this happens the full power of this setup would greatly improve?
anyway i have had my Tab S running snappy for me and no complaints at this time

You cannot compare the clock speeds from two different processors. For instance, you can't compare the 1.9GHz quad-core of the Exynos to the 2.3GHz quad-core of the Snapdragon 800. This doesn't mean anything. If you compare the clock speed of two Snapdragon chips, that's ok, or if you compare the clock speed of two Exynos chips, then that's ok too. Comparing the clock speed of an Intel chip against the clock speed of an AMD chip, is the same as comparing the clock speed of an Exynos chip to the clock speed of a Snapdragon chip.
The Exynos chip in this tablet has been shown to compete very well/close with the Snapdragon on every level except GPU. The Mali GPU in this chip just doesn't match the Adreno GPU from the Snapdragon. However, the RAM is faster in the Exynos than the Snapdragon.
That said, I am a fan of the Snapdragon chip, of course. I was holding off to see if the LTE variant of this tablet would have the Snapdragon 800, but instead they shipped with an Intel LTE modem. Besides apps/games not being optimized for Exynos, I am fairly satisfied with my purchase. I'm just anxious to get CyanogenMod(or any other AOSP ROM installed on it).

fletch33 said:
i had heard from a Samsung rep i actually enjoy talking to that Sammy had just figured the all cores at once and we should see updates that turn that feature on. when this will happen who knows. i also did not ask him for a link and now cant find that info on the web so when i see him again soon i will get more info.
i would assume (insert you know what that means) that when/if this happens the full power of this setup would greatly improve?
anyway i have had my Tab S running snappy for me and no complaints at this time
Click to expand...
Click to collapse
Could also mean increased battery consumption,don't know. Overall I am satisfied with this Tab including battery life.

There are 3 different performace results:
a) what Exynos 520 does achieve in practice now, measured bei some benchmarks and real world performance (<= Snapdragon 800)
b) what it could do theoretically - but will never happen due to driver and scheduler etc issues (>> Snapdragon)
c) what it will do some day in near future on an optimized ROM (somewhere in between?)
Fortunately the Exynos 5420 does support all 8 cores in parallel, see here:
http://www.notebookcheck.net/Samsung-Exynos-5420-Octa-SoC.103633.0.html

pibach said:
There are 3 different performace results:
a) what Exynos 520 does achieve in practice now, measured bei some benchmarks and real world performance (<= Snapdragon 800)
b) what it could do theoretically - but will never happen due to driver and scheduler etc issues (>> Snapdragon)
c) what it will do some day in near future on an optimized ROM (somewhere in between?)
Fortunately the Exynos 5420 does support all 8 cores in parallel, see here:
http://www.notebookcheck.net/Samsung-Exynos-5420-Octa-SoC.103633.0.html
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Click to collapse
Wish I knew how. Probably a linux thing. ...
If it is possible to implement in today's existing source, I'm sure @AndreiLux would know about it ?

UpInTheAir said:
Wish I knew how. Probably a linux thing. ...
If it is possible to implement in today's existing source, I'm sure @AndreiLux would know about it ?
Click to expand...
Click to collapse
It's impossible.

AndreiLux said:
It's impossible.
Click to expand...
Click to collapse
What and why?

pibach said:
What and why?
Click to expand...
Click to collapse
http://www.androidauthority.com/sam...ta-can-use-eight-cores-simultaneously-267316/
I've found a few articles saying it should support it, then a couple Deva saying they had to goto the 5422 for a working implementation of HMP.
Here is a post from odroid
http://forum.odroid.com/viewtopic.php?f=97&t=5651

That's weird. The (newer) 5422 supports HMP but not 3gb RAM.

[Q] Do you feel 2gb is not enough?

Hi well I currently own a Galaxy tab s 10.5, however i'm not 100% pleased with it. So I was wondering if i should get the tab pro 8.4 instead, but don't know if the 2gb of ram is something that hold the tab pro.
My main problem with the S is the inconsistent performance which I think is because the exynos. On my S4 the performance is very consistent.
Thanks.

Well I hw the 8.4 and wouldn't get anything else, its justnthe right size, I do have a 10 ipad2 and I usenthe 8.4 way more.
As far as memory for it I'm assuming you mean sdcard I would get as big as you can afford,
Sent from my SM-T320 using Tapatalk

cloud71 said:
Well I hw the 8.4 and wouldn't get anything else, its justnthe right size, I do have a 10 ipad2 and I usenthe 8.4 way more.
As far as memory for it I'm assuming you mean sdcard I would get as big as you can afford,
Sent from my SM-T320 using Tapatalk
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Click to collapse
No, I mean ram, not storage space. The size also for the tab s is something that bugs me after using it for a week i don't like the way a lot of apps looks, they are not optimized for an android tablet with this screen size.

CyberManiaK said:
No, I mean ram, not storage space. The size also for the tab s is something that bugs me after using it for a week i don't like the way a lot of apps looks, they are not optimized for an android tablet with this screen size.
Click to expand...
Click to collapse
I haven't had a prob with it, run all kinds of stuff on it, with it stock and more so rooted and with custom rom that is debloated.
Sent from my SM-T320 using Tapatalk

I have never had a problem with not enough RAM memory.
Even not problems with CPU on my 8.4 .
Stay tuned for my first CM11 theme soon.

Hello,
More RAM is never enough. You are comparing technical detail with a subjective detail (logical vs sentimental). It is not a fair comparison. So you must choose what is more important to you.

CyberManiaK said:
My main problem with the S is the inconsistent performance which I think is because the exynos. On my S4 the performance is very consistent.
Thanks.
Click to expand...
Click to collapse
The S4 has 2GB of memory. If you're happy with the S4's performance, than the Tab Pro's 2GB of memory should perform similarly. I think Samsung stuck 3GB of ram in the Exynos models in order to match the performance of the Snapdragon 800 / 2GB RAM models. I read the Exynos + 3GB combo barely outperforms the Snapdragon 800 + 2GB combo on benchmarks. The Exynos combo has to perform better to help justify its price.

HKSpeed said:
The S4 has 2GB of memory. If you're happy with the S4's performance, than the Tab Pro's 2GB of memory should perform similarly. I think Samsung stuck 3GB of ram in the Exynos models in order to match the performance of the Snapdragon 800 / 2GB RAM models. I read the Exynos + 3GB combo barely outperforms the Snapdragon 800 + 2GB combo on benchmarks. The Exynos combo has to perform better to help justify its price.
Click to expand...
Click to collapse
The 3Gb ram is only for the 12.2 version all others are 2Gb.
Never run into problems with my 2Gb (smt520), and I run ram intensive apps

.:GraveD:. said:
The 3Gb ram is only for the 12.2 version all others are 2Gb.
Never run into problems with my 2Gb (smt520), and I run ram intensive apps
Click to expand...
Click to collapse
I think the OP is comparing the 3GB Tab S 10.5 vs 2GB Tab Pro 8.4

Thanks, Cool i just order the pro 8.4 to give it a run this weekend to see how it run.
Yeah i was talking about the tab s 10.5 vs pro 8.4

CyberManiaK said:
Thanks, Cool i just order the pro 8.4 to give it a run this weekend to see how it run.
Yeah i was talking about the tab s 10.5 vs pro 8.4
Click to expand...
Click to collapse
Hello,
See: http://www.anandtech.com/print/7886/samsung-galaxy-tab-pro-84-and-101-review and http://www.anandtech.com/show/8197/samsung-galaxy-tab-s-review-105-84inch

Well I got the tab pro 8.4 yesterday and damn is a night to day difference this one is way smoother than the tab s. And it's exactly what I was looking for, it behaves exactly if not better than my S4.
However I have some questions, is normal that it gets hot like 38~40c while browsing, the backside is not very hot to the touch but yeah is warmer than what I'm a used to.
BTW: @cviniciusm thanks for those links.

CyberManiaK said:
Well I got the tab pro 8.4 yesterday and damn is a night to day difference this one is way smoother than the tab s. And it's exactly what I was looking for, it behaves exactly if not better than my S4.
However I have some questions, is normal that it gets hot like 38~40c while browsing, the backside is not very hot to the touch but yeah is warmer than what I'm a used to.
BTW: @cviniciusm thanks for those links.
Click to expand...
Click to collapse
That's pretty normal for a s800.
However it only gets warm on the left of the device and it only started to effect performance after nearly an hour of heavy gaming. (thermal throtling)

Hamza Murad said:
That's pretty normal for a s800.
However it only gets warm on the left of the device and it only started to effect performance after nearly an hour of heavy gaming. (thermal throtling)
Click to expand...
Click to collapse
Hello,
About big.LITTLE technology(http://www.arm.com/files/pdf/big_LITTLE_Technology_the_Futue_of_Mobile.pdf and http://www.arm.com/products/processors/technologies/biglittleprocessing.php?intcid=TopNaviL16456# ) :
"High performance requires fast CPUs which in turn can be difficult to fit in a mobile power or thermal budget. At the same time battery technology has not evolved at the same rate as CPU technology. Therefore today we are in a situation where smartphones require higher performance, but the same power consumption.
The development and design of next generation mobile processors is necessarily guided by the following factors:
1. At the high performance end: high compute capability but within the thermal bounds
2. At the low performance end: very low power consumption
ARM big.LITTLE™ technology has been designed to address these requirements."
So, you will get high performance with Pro 8.4 (Snapdragon 800) at expenses of heat and high battery consumption.
Very interesting we are seeing/getting the alternative evolution of processors technology as battery technology has slow evolution, so Samsung is investing on this technology [emoji6]
Pro 10.1 and 12.2 and Tab S use big.LITTLE technology.
See too: ARM big.LITTLE Technology Explained: http://youtu.be/KClygZtp8mA

cviniciusm said:
Hello,
About big.LITTLE technology(http://www.arm.com/files/pdf/big_LITTLE_Technology_the_Futue_of_Mobile.pdf and http://www.arm.com/products/processors/technologies/biglittleprocessing.php?intcid=TopNaviL16456# ) :
"High performance requires fast CPUs which in turn can be difficult to fit in a mobile power or thermal budget. At the same time battery technology has not evolved at the same rate as CPU technology. Therefore today we are in a situation where smartphones require higher performance, but the same power consumption.
The development and design of next generation mobile processors is necessarily guided by the following factors:
1. At the high performance end: high compute capability but within the thermal bounds
2. At the low performance end: very low power consumption
ARM big.LITTLE™ technology has been designed to address these requirements."
So, you will get high performance with Pro 8.4 (Snapdragon 800) at expenses of heat and high battery consumption.
Very interesting we are seeing/getting the alternative evolution of processors technology as battery technology has slow evolution, so Samsung is investing on this technology [emoji6]
Pro 10.1 and 12.2 and Tab S use big.LITTLE technology.
See too: ARM big.LITTLE Technology Explained: http://youtu.be/KClygZtp8mA
Click to expand...
Click to collapse
big.LITTLE was bad implemented in exynos 5420...

panda0 said:
big.LITTLE was bad implemented in exynos 5420...
Click to expand...
Click to collapse
Hello,
It was on 5410 due to CCI-400 bug.
But it seems to be solved on 5420 as AnandTech and others says.
Do you have any sources to support the bad implementation affirmation, please?

cviniciusm said:
Hello,
It was on 5410 due to CCI-400 bug.
But it seems to be solved on 5420 as AnandTech and others says.
Do you have any sources contrary, please?
Click to expand...
Click to collapse
I've read here in XDA Foruns that 5420 don't have HMP mode properly implemented.
It uses 4 A7 cores and 4 A15 cores. OK. But when the load of any of the A7 cores rises up, all the A7 cores are disabled and all the A15 cores are enabled. You probably knows that each A7 should call its A15 companion, but it seems that this doesn't works with the 5420. Also, there are some mentions to thermal throttling that concerns me a little.

panda0 said:
I've read here in XDA Foruns that 5420 don't have HMP mode properly implemented.
It uses 4 A7 cores and 4 A15 cores. OK. But when the load of any of the A7 cores rises up, all the A7 cores are disabled and all the A15 cores are enabled. You probably knows that each A7 should call its A15 companion, but it seems that this doesn't works with the 5420. Also, there are some mentions to thermal throttling that concerns me a little.
Click to expand...
Click to collapse
Hello,
I suppose you're right. But, I think a new kernel and driver can solve this whether not a hardware bad implementation.
More information :
1) http://www.anandtech.com/show/7811/samsungs-exynos-5422-the-ideal-biglittle-exynos-5-hexa-5260
"The 5422 supports HMP (Heterogeneous Multi-Processing), and Samsung LSI tells us that unlike the 5420 we may actually see this one used with HMP enabled."
2) http://www.arm.com/files/pdf/Hetero...ynos_5_Octa_with_ARM_bigLITTLE_Technology.pdf

Still waiting for a proper HMP kernel from Samsung otherwise Exynos is not much worth it...
smt520 stock - gt i9300 archidroid

rchtk said:
Still waiting for a proper HMP kernel from Samsung otherwise Exynos is not much worth it...
smt520 stock - gt i9300 archidroid
Click to expand...
Click to collapse
Hello,
See http://www.anandtech.com/show/7313/samsung-announces-biglittle-mp-support-in-exynos-5420 :
"
For those not familiar, there are three big.LITTLE models, core switching, in which any of the A7 and A15 cores can be swapped, cluster switching, in which either all A7s or all A15s can be swapped, or HMP, where the kernel is aware of all cores and can schedule threads to any of the cores all at once. This final model is coming to Exynos 5420 by the end of Q4 2013 and will be available to partners shipping product based on its reference platform.
"
According CPU-Z the revision is r2p3, but I don't know what it means.
Unfortunately, I don't know how to verify/confirm whether my device has HMP (Global Task Scheduling) .
Edit: according http://en.m.wikipedia.org/wiki/Big....multi-processing_.28global_task_scheduling.29
"Upstream big.LITTLE GTS patches were incorporated into the mainline Linux kernel starting with Linux 3.10. This model has been implemented in the Samsung Exynos 5 Octa (5420, 5422, 5430) and Hexa (5260)."
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Does Exynos 5420 of Tab S support HMP and enable real 8 core?

I just read some articles that 5420 may enable 8 core processor by soft update. Is it true?
Sent from my Galaxy Note 2

Alexsandra said:
I just read some articles that 5420 may enable 8 core processor by soft update. Is it true?
Sent from my Galaxy Note 2
Click to expand...
Click to collapse
they're already enabled. next.

Jodova: if you don't understand the question then don't answer and display your ignorance. He's asking about enabling all right at the same time, not the big.Little configuration they're in now.
Hopefully Samsung will enable this soon.
Sent from my GT-N7000 using Tapatalk 2

I can't imagine needing all 8 cores at the same time. It seems it works great under heavy loads as is.
Forgive my ignorance but, would we really benefit? It seems to me it would absolutely destroy the battery.

Is there any octa-core device running all 8 cores out of the box?

LoVeRice said:
Is there any octa-core device running all 8 cores out of the box?
Click to expand...
Click to collapse
I attached a image for your question. It looks like Galaxy S5 should support enable 8 core. I think Little Big is designed for beautiful scoring not for daily usage.:banghead: I prefer to choose the latest Snapdragon Chip
Sent from my Galaxy Note 2

Brenardo said:
I can't imagine needing all 8 cores at the same time. It seems it works great under heavy loads as is.
Forgive my ignorance but, would we really benefit? It seems to me it would absolutely destroy the battery.
Click to expand...
Click to collapse
I expect my next Tab or tablet could have enough powerful processor which is able to make me forget my windows laptop. Battery killer? Samsung ROM is the best battery killer
Sent from my Galaxy Note 2

Zamboney said:
Jodova: if you don't understand the question then don't answer and display your ignorance. He's asking about enabling all right at the same time, not the big.Little configuration they're in now.
Hopefully Samsung will enable this soon.
Sent from my GT-N7000 using Tapatalk 2
Click to expand...
Click to collapse
I am waiting for update or Sony Z2 tablet is my alternative option
Sent from my Galaxy Note 2

Exynos 5420 + HMP = Exynos 5422. So no, Exynos 5420 which is in the S doesn't (and won't) support HMP.

BarryH_GEG said:
Exynos 5420 + HMP = Exynos 5422. So no, Exynos 5420 which is in the S doesn't (and won't) support HMP.
Click to expand...
Click to collapse
:banghead::banghead:
Sent from my Galaxy Note 2

Here's a slide from Qualcomm. The same holds true with Exynos where 85% of apps never leave the A7 cluster. In a few instances using A7 and A15 at the same time might provide needed extra power but how many apps or games exceed the power provided by four A15 chips?

Check out this:
http://www.slashgear.com/samsung-te...lementation-for-exynos-ahead-of-ces-29310253/
In this article. from Dec 2013 , more than 6 months before the tab S was released, a "Samsung Engineer" is quoted as saying:
'The ARM-based Exynos 5 Octa is currently used in a range of Samsung tablets and smartphones, but only one Exynos model, the 5420, is hardware-enabled for HMP. The 5420 is currently found in the Galaxy Note 3 and Galaxy Note 10.1. However, HMP is currently software-disabled because HMP would overheat such devices, a Samsung engineer stated.'

Samsung announced two new mobile SoCs at MWC today. The first is an update to the Exynos 5 Octa with the new Exynos 5422. The 5422 is a mild update to the 5420, which was found in some international variants of the Galaxy Note 3. The new SoC is still built on a 28nm process at Samsung, but enjoys much higher frequencies on both the Cortex A7 and A15 clusters. The two clusters can run their cores at up to 1.5GHz and 2.1GHz, respectively. The 5422 supports HMP (Heterogeneous Multi-Processing), and Samsung LSI tells us that unlike the 5420 we may actually see this one used with HMP enabled. HMP refers to the ability for the OS to use and schedule threads on all 8 cores at the same time, putting those threads with low performance requirements on the little cores and high performance threads on the big cores.
The GPU is still the same ARM Mali-T628 MP6 from the 5420, running at the same frequency. Samsung does expect the 5422 to ship with updated software (drivers perhaps?) that will improve GPU performance over the 5420.​http://www.anandtech.com/show/7811/samsungs-exynos-5422-the-ideal-biglittle-exynos-5-hexa-5260
The Exynos 5422 in the SGS5 is running at the same clock speed as the 5420 vs. the higher speeds it's capable of supporting. So it's highly likely 5420 and 5422 have the same heat envelope.
@AndreiLux is a leading kernel developer on XDA. You can review his comments on 5420 ever being able to support HMP in this thread. I'd take it as gospel. Getting HMP working where it's disabled is kind of like threads about reversing KNOX after it's tripped. Both are urban myths.
http://forum.xda-developers.com/showthread.php?t=2645875

It's not impossible for the 5420, it's been done and I've seen the Samsung patch (I linked the patch in another thread in our forum somewhere). As far as I'm aware, it just hasn't been done on Android. It may require many changes including Linux version, governor etc etc
I personally (just guessing) think that Samsung haven't bothered for our device because of heating issues and invoking thermal throttling at an earlier stage. For most applications, such power would not be needed.
Edit: OK, the patch I quoted was for 5410, but I've seen similar for 5420. ...
This is the thread in I'm referring to previous discussion.
http://forum.xda-developers.com/showthread.php?p=54700335
If Samsung invested the time money and resources, I'm quite sure that is not "impossible" to do it for our device. Due to the above stated reasons, I feel it's quite "improbable".

UpInTheAir said:
It's not impossible for the 5420, it's been done and I've seen the Samsung patch (I linked the patch in another thread in our forum somewhere). As far as I'm aware, it just hasn't been done on Android. It may require many changes including Linux version, governor etc etc
I personally (just guessing) think that Samsung haven't bothered for our device because of heating issues and invoking thermal throttling at an earlier stage. For most applications, such power would not be needed.
Edit: OK, the patch I quoted was for 5410, but I've seen similar for 5420. ...
This is the thread in I'm referring to previous discussion.
http://forum.xda-developers.com/showthread.php?p=54700335
If Samsung invested the time money and resources, I'm quite sure that is not "impossible" to do it for our device. Due to the above stated reasons, I feel it's quite "improbable".
Click to expand...
Click to collapse
That patch in that previous discussion won't work, and neither will any for the 5420 due to various reasons I already explained in the past.

AndreiLux said:
That patch in that previous discussion won't work, and neither will any for the 5420 due to various reasons I already explained in the past.
Click to expand...
Click to collapse
I never implied that that specific patch will work, just an example of what's "possible".
Here is a link on a working 5420 HMP in a Samsung demo:
https://www.google.co.th/url?sa=t&...wIwAA&usg=AFQjCNE0QItCM5_UdrpSajCtUSJ3Dt3WBw
As i maintain , possible, but improbable. ...

UpInTheAir said:
As i maintain , possible, but improbable. ...
Click to expand...
Click to collapse
And I maintain that it is not possible.

AndreiLux said:
And I maintain that it is not possible.
Click to expand...
Click to collapse
The video isn't shot by David Copperfield . ...... This is clear evidence, not hearsay. Not "impossible", because it's actually been done

UpInTheAir said:
The video isn't shot by David Copperfield . ...... This is clear evidence, not hearsay. Not "impossible", because it's actually been done
Click to expand...
Click to collapse
Do you really want to argue with me? The CCI is disabled in hardware on the SoC and it's impossible in any kind of way to circumvent this via software. Beyond that we need changes to the bootloader to be able to properly manage booting of the clusters as the PM is protected/handled over TrustZone.
You will never see HMP work on any 5420 on any publicly available hardware. Period.

AndreiLux said:
Do you really want to argue with me? The CCI is disabled in hardware on the SoC and it's impossible in any kind of way to circumvent this via software. Beyond that we need changes to the bootloader to be able to properly manage booting of the clusters as the PM is protected/handled over TrustZone.
You will never see HMP work on any 5420 on any publicly available hardware. Period.
Click to expand...
Click to collapse
You know that i wasnt arguing...... My point was that's is not impossible (video evidence !!), but improbable. Samsung have the resources to do just about anything they put there minds, money and motivation too. I also referred to generally 5420 , and not our specific device......
I agree on your last statement (edit: for existing public available hardware), The demo 5420 HMP clearly works.

[Q] Can Samsung Galaxy Tab S SM-T700 use all 8 cores at same time?

Can Exynos 5 OCTA 5420 use all 8 cores at same time?
How is Samsung Galaxy Tab S SM-T700 performance compared to Samsung Galaxy Tab S SM-T705( with Qualcomm Snapdragon 800)?

The Exynos cpu performs admirably against my htc one m8 snapdragon cpu and ranks highly with other top performing cpu's.
Even better with Skyhigh kernel.

Worth mentioning these Exynos units suck the battery dry much faster than the Qualcomm S800 without delivering more performance.

mrcet007 said:
Can Exynos 5 OCTA 5420 use all 8 cores at same time?
How is Samsung Galaxy Tab S SM-T700 performance compared to Samsung Galaxy Tab S SM-T705( with Qualcomm Snapdragon 800)?
Click to expand...
Click to collapse
According to the wikipedia article, the Linux kernel does have a scheduler mode that allows to use all cores or switch between them as needed. I don't know if the Samsung stock kernel or others actually use that mode.
One important issue is that you should not be carried away with the idea that having more cores is always better for performance. It takes a lot of work to write software that can actually load four or eight cores. Moreover, a lot of algorithms are still bottle-necked by one core and there is no way to change that. As a result, a typical PC with a quad core Intel i5 CPU is usually faster than a PC with a six or eight core AMD CPU, thanks to intel's much better individual core performance. This truth is even more relevant on tablets, which are effectively single-user machines, usually running only one big application at a time. I wouldn't lose a minute of my sleep over having only two working cores instead of four or eight.