Kernel auditor reports big and little cores? - Xiaomi Redmi Note 4 Questions & Answers

Hay guys,
For some reason, my Redmi note 4 reports big and little core in kernel auditor, correct me if I am wrong but, as far as I am aware this device is not built on the big and little arcetecture?
If not then why is kernel auditor report that it is?
Kind regards

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Yes, snapdragon 625 using big.LITTLE configuration, but the different is they used Cortex-A53 for both. Correct me if I wrong though.
Sent from my Redmi Note 4 using Tapatalk
---------- Post added at 10:54 PM ---------- Previous post was at 10:48 PM ----------
Oh, just did some reading on arm website, Cortex-A53 just up to 4 cores. So its absolutely big.LITTLE configuration.
Sent from my Redmi Note 4 using Tapatalk

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No, Snapdragon 625 does not implement the big.LITTLE architecture, as all eight cores are the same A53 design clocked from 652 MHz to 2 Ghz. The A53 is usually used as the LITTLE part of the package and complemented by more powerful A57 or A72 cores, or a group of the same A53 cores but clocked separately and at a significantly higher frequency.

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DTSI analyze shows that SD625 actually has 2 A53 CPUs clocked at the same frequency, so it's completely normal to expect some kernel tuning or CPU monitoring apps to report big + LITTLE cores although it's not HMP.
Sent from my Redmi 3 using XDA Labs

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Ok thanks for that, is it normal to see cpu load differs from one lot or cores to the other?

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HatchetEgg said:
Hay guys,
For some reason, my Redmi note 4 reports big and little core in kernel auditor, correct me if I am wrong but, as far as I am aware this device is not built on the big and little arcetecture?
If not then why is kernel auditor report that it is?
Kind regards
Click to expand...
Click to collapse
Which ROM do u use? Did u ever flash a custom kernel?
Sent from my Redmi Note 4 using Tapatalk

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nilanko said:
Which ROM do u use? Did u ever flash a custom kernel?
Click to expand...
Click to collapse
Yes I'm using elecrablue kernel and AEX
However I have flashed different ROMS even stock ROMS, with complete wipe and still reports Big. Little cores.

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HatchetEgg said:
Yes I'm using elecrablue kernel and AEX
However I have flashed different ROMS even stock ROMS, with complete wipe and still reports Big. Little cores.
Click to expand...
Click to collapse
Same problem here. I flashed velvet kernel on MIUI 8.2.10.0 and then Kernel Adiutor started reporting big LITTLE. I wiped everything and flashed stock ROM using MIFLASH which flashes all partitions, kernel and everything. But kernel adiutor still reports big LITTLE. It never reported big LITTLE before I had flashed custom kernel. Snapdragon 625 doesn't implement big LITTLE because all cores are same A53 with same clock of 2GHz.
This is bothersome because now I have noticed that the BIG cluster is always in use with CPU usage shooting up on performing any task (it has the cores 4, 5, 6, 7) whereas the LITTLE cluster (cores 0, 1, 2, 3) are mostly at 0% CPU usage and are sitting idle. Only 4 cores are being used most of the time. And as a result, I have started experiencing lags..
Don't tell me big.LITTLE is great and all that. I know what it is but it was never there on my phone. Now it is there and I can't get rid of it. And it is slowing down my phone making it laggy!

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nilanko said:
Same problem here. I flashed velvet kernel on MIUI 8.2.10.0 and then Kernel Adiutor started reporting big LITTLE. I wiped everything and flashed stock ROM using MIFLASH which flashes all partitions, kernel and everything. But kernel adiutor still reports big LITTLE. It never reported big LITTLE before I had flashed custom kernel. Snapdragon 625 doesn't implement big LITTLE because all cores are same A53 with same clock of 2GHz.
This is bothersome because now I have noticed that the BIG cluster is always in use with CPU usage shooting up on performing any task (it has the cores 4, 5, 6, 7) whereas the LITTLE cluster (cores 0, 1, 2, 3) are mostly at 0% CPU usage and are sitting idle. Only 4 cores are being used most of the time. And as a result, I have started experiencing lags..
Don't tell me big.LITTLE is great and all that. I know what it is but it was never there on my phone. Now it is there and I can't get rid of it. And it is slowing down my phone making it laggy!
Click to expand...
Click to collapse
Yes this is mainly why I am concernd about it. As all core are not fully utilitised.
And our device is not disigned for Big.Little cores as they are all the same. I am just hoping maybe someone will know exactly what it is thats causing this issue for us. So we can resolve it.

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HatchetEgg said:
Yes this is mainly why I am concernd about it. As all core are not fully utilitised.
And our device is not disigned for Big.Little cores as they are all the same. I am just hoping maybe someone will know exactly what it is thats causing this issue for us. So we can resolve it.
Click to expand...
Click to collapse
I guess the custom kernels are making some change somewhere that is not being changed even after flashing stock ROM. What modifications do custom kernels make? They write the boot partition. They also make changes to the system partition (push modules). But both of these are over-written upon flashing stock ROM. What else is modified by custom kernels? Any idea anyone?
Sent from my Redmi Note 4 using Tapatalk

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This problem is serious and I was about to create a new thread about this problem when I found this thread. But seems like it's gonna die. Please someone shed some light. My phone is running on 4 cores most of the time now [emoji24] It's kinda lagging!
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@HatchetEgg can you try flashing a Xiaomi.eu ROM, root it and then check kernel adiutor and see if it still reports big little?
Sent from my Redmi Note 4 using Tapatalk

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nilanko said:
This problem is serious and I was about to create a new thread about this problem when I found this thread. But seems like it's gonna die. Please someone shed some light. My phone is running on 4 cores most of the time now [emoji24] It's kinda lagging!
@HatchetEgg can you try flashing a Xiaomi.eu ROM, root it and then check kernel adiutor and see if it still reports big little?
Sent from my Redmi Note 4 using Tapatalk
Click to expand...
Click to collapse
Yer I did try this, but it still reports big and little cores.

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HatchetEgg said:
Yer I did try this, but it still reports big and little cores.
Click to expand...
Click to collapse
Ugh. I too installed miui pro rom but still reports big little but this time the cores 1,2,3,4 are active and the rest are sitting idle [emoji52] I think there's something wrong with /sys/
Sent from my Redmi Note 4X using Tapatalk

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nilanko said:
Ugh. I too installed miui pro rom but still reports big little but this time the cores 1,2,3,4 are active and the rest are sitting idle [emoji52] I think there's something wrong with /sys/
Sent from my Redmi Note 4X using Tapatalk
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Click to collapse
That was what I was thinking, however i'm not sure what to do here. Since the flash files don't contain the sys folder.

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HatchetEgg said:
That was what I was thinking, however i'm not sure what to do here. Since the flash files don't contain the sys folder.
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Click to collapse
I think that sys/ is not over written even after flashing stock rom. There are certain things which aren't flashed even after using miflash, for example the persist partition. I guess this sys/ is also one of them [emoji52]
Sent from my Redmi Note 4X using Tapatalk

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P.s. I'm on miui pro rom and I'm not facing those lags anymore. Really don't understand how to resolve that problem on stock rom
Sent from my Redmi Note 4X using Tapatalk

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I personally do not prefer to so much on custom kernels and so on. Years of experience with phones, if the phone hardware is good, it will be as is. If the custom rom is good, it is good as is too. Applying governors is never been my preference since. My point is, I'm having the RR, and just with its stock kernel. If it ain't spoil, don't fix it. My 2 cents

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precsmo said:
I personally do not prefer to so much on custom kernels and so on. Years of experience with phones, if the phone hardware is good, it will be as is. If the custom rom is good, it is good as is too. Applying governors is never been my preference since. My point is, I'm having the RR, and just with its stock kernel. If it ain't spoil, don't fix it. My 2 cents
Click to expand...
Click to collapse
I need kcal for improving colors on my mido display because the display sucks. That's the only reason I need custom kernel.
Sent from my Redmi Note 4X using Tapatalk