Exynos Octa SM-G900H Benchmark, Geat, and Battery Life

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iba21

iba21

Senior Member
Jul 1, 2010
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AndreiLux said:
The Snapdragons still suffer from the hotplugging lag.
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I read it only now..

Well powergating is the best hardware implementation ever!!

One thing.. since you are using the s4 octa.. are you quite sure kernel scheduler doesen't "send" tasks to 1 core when it's not necessary to permit a shut down of the correct transistors?

Because in theory, 3.10 scheduler can do it, but, don't know if it works with the 3.4 scheduler.. i'm meaning.. when i see the core load is 0, in theory that core is automatically shutted down by the powergating tech.. right?
 
cmd512

cmd512

Senior Member
Aug 25, 2009
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AndreiLux said:
The new Exynos version come with new kind of fine-grained power management, overheating should be of the past and impossible.
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Please tell me you've changed your mind and will be buying an Exynos S5 and developing Perseus for it? I'm just waiting for an excuse at this point... :)

Sent from my GT-I9500 using Tapatalk
 
iba21

iba21

Senior Member
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AndreiLux said:
It comes with HMP but that's not what I'm talking about.

The device comes with something called ARM Intelligent Power Allocation (IPA) which is basically a very fine-grained power tracking and estimation thermal framework to control DVFS. The device is capped at 3.5W TDP between all CPUs and GPU, so it should never cause a heating overrun. And it seems that it doesn't affect performance given the videos.
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Where may i find some infos about IPA?

I'm curious
 
H

hung2900

Senior Member
Apr 3, 2012
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leoaudio13 said:
Which would never happen

Sent from my SM-G900F using Tapatalk
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Note 2:confused:

iba21 said:
I read it only now..

Well powergating is the best hardware implementation ever!!

One thing.. since you are using the s4 octa.. are you quite sure kernel scheduler doesen't "send" tasks to 1 core when it's not necessary to permit a shut down of the correct transistors?

Because in theory, 3.10 scheduler can do it, but, don't know if it works with the 3.4 scheduler.. i'm meaning.. when i see the core load is 0, in theory that core is automatically shutted down by the powergating tech.. right?
Click to expand...
Click to collapse

What? Are you serious with the powergating? Dynamic clockrate (Asymmetric Multiprocessing) is much better. I think you meant the combination of both
 
Last edited:
iba21

iba21

Senior Member
Jul 1, 2010
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hung2900 said:
Note 2:confused:



What? Are you serious with the powergating? Dynamic clockrate (Asymmetric Multiprocessing) is much better. I think you meant the combination of both
Click to expand...
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Are you meaning the clock gating?

Because the asymmetric multiprocessin and the power gating are 2 different things

What i would say is, normal arm soc uses the kernel driver to say to the cpu to shut down one core (turn off transistor's alimentation)
With power gating it's all automatically, no use = no tension over the transistors..

That's why we always have 4 cores turned on (for the kernel scheduler), when, with another chip, ex, 4412 of note2, or a qualcomm's chip, you'll see X cores on and Y cores off..

That's a good thing to have less lag by linux scheduling

If you are meaning about the qualcomm's asymmetric voltage.. well.. that is another unusefull thing
 
AndreiLux

AndreiLux

Senior Member
Jul 9, 2011
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iba21 said:
What i would say is, normal arm soc uses the kernel driver to say to the cpu to shut down one core (turn off transistor's alimentation)
With power gating it's all automatically, no use = no tension over the transistors..
Click to expand...
Click to collapse
It's not automatic. The cpuidle driver in the kernel is still in charge of power gating.
 
H

hung2900

Senior Member
Apr 3, 2012
347
91
iba21 said:
Are you meaning the clock gating?

Because the asymmetric multiprocessin and the power gating are 2 different things

What i would say is, normal arm soc uses the kernel driver to say to the cpu to shut down one core (turn off transistor's alimentation)
With power gating it's all automatically, no use = no tension over the transistors..

That's why we always have 4 cores turned on (for the kernel scheduler), when, with another chip, ex, 4412 of note2, or a qualcomm's chip, you'll see X cores on and Y cores off..

That's a good thing to have less lag by linux scheduling

If you are meaning about the qualcomm's asymmetric voltage.. well.. that is another unusefull thing
Click to expand...
Click to collapse

I wanna say abt your statement that power gating is the best hardware implementation ever.:confused:
 
J

joney g.

Member
Mar 7, 2015
31
4
f6qrdu4EokZmBDSz5b6gbF_TLdKjebdxqbhoMXroPtRaTlnYrwiza_TrFVHhzeGGtayb-Mz4s6PkhX8=w1366-h638-rw

wanted rom v5...
g900h
 
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    AndreiLux
    AndreiLux
    system.img said:
    Samsung advertises "True Octa Core" capabilities with this device and this certainly means that Samsung is shipping the device with HMP enabled.
    Does HMP offer better battery management over the previous implementations?
    Click to expand...
    Click to collapse
    It comes with HMP but that's not what I'm talking about.

    The device comes with something called ARM Intelligent Power Allocation (IPA) which is basically a very fine-grained power tracking and estimation thermal framework to control DVFS. The device is capped at 3.5W TDP between all CPUs and GPU, so it should never cause a heating overrun. And it seems that it doesn't affect performance given the videos.
    View
    6
    AndreiLux
    AndreiLux
    The new Exynos version come with new kind of fine-grained power management, overheating should be of the past and impossible.
    View
    4
    system.img
    system.img
    dragon135 said:
    There is still little information about the octa variant. No review about score and battery life.
    So I was able to install antutu on demo unit. The score is high and the phone is not heating. All 8 cores can run together but Antutu reports the freq is 500-1300MHz and not recognize the cpu model name.

    Please post your benchmark and battery life.
    Click to expand...
    Click to collapse

    Damn. Exynos is consistently higher than the Snapdragon 801 in Antutu.
    Only disappointment is the lack of LTE though(and ROMs too).
    View
    4
    AndreiLux
    AndreiLux
    iba21 said:
    I'm meaning.. does it have the most hardware functions to have a pure stable and low power efficiency soc?
    Click to expand...
    Click to collapse
    The 5422 brings already lots of good improvements and what you claim. I'm just raving about the HEVC decoder in the 5430.

    The KGI report mentioned the 5430 on 20nm but I found zero evidence to back that up so it might as well be wrong, but he was right on everything else, so who knows.

    Anyway S.LSI's SoC lineup over this summer and probably the good part of the year is the 3250, 5260, 5412, 5422, and 5430. I don't expect anything above that in the current generation.

    Enough speculating, I shared what I know for facts. Wait & see for everything else.
    View
    4
    AndreiLux
    AndreiLux
    leoaudio13 said:
    It is still Andrei it is still
    Click to expand...
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    I've read the opposite from other people such as the OP. All depends on firmware you had on your version. We'll see when somebody actually bothers to properly test it. I'm just stating what I see in the code.

    @dragon135

    The 5430 has a HEVC decoder, dedicated clock domain on the display interface, higher clocks in general, GPU at 600MHz (no info on core count but improvement is a possibility), and a new dedicated A5 co-processor for audio decoding and encoding called "Siren". The HEVC decoder alone is worth it imho since it provides good future-proofing of the device.
    View

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