[KERNEL][E5823/E5803] Zach's Kernel Playground for Z5C, WIP (work in progress)

[Macko mia]

I'd say official.

Finally.....:good:

if possible please add voltage control & OC features :fingers-crossed:

 

[Macko mia]

Okay, I take it as a "yes" as request for CarbonROM custom kernel refresh (due to interest),

updating the ramdisk probably will fix the not booting issue ...

What specific lineageOS build do you want a custom kernel for ? Berni's ? Official ?

so r u still working on carbon ROM custom kernel ?

I can be your tester :fingers-crossed:

 

[shanpao]

Did you make a 7.1.1 154 firmware kernel yet?

 

[trax7]

Did you make a 7.1.1 154 firmware kernel yet?

If he did make one for .54 it would have already been here. Patience. :good:

 

[Macko mia]

:fingers-crossed:

 

[zacharias.maladroit]

ugh - let's hope this one is working fine
...

Kernel for 32.4.A.1.54 (Android Nougat 7.1.1) ROMs


Sauce:
https://github.com/zachariasmaladro...i_r2/commits/32.4.A.1.54_Sun-Kernel_Logos_I.1


Battery life under investigation to match stock kernel,

There should be a detailed instruction on how to build a binary matching kernel to Sony's stock kernel so that we get at least similar battery runtime & smoothness
and get to know how to achieve a most stable kernel, also that's usually the assumed way to comply with GPL

works fine with M-ROM and similar ROMs on Z5 (no UI crashes)


LOL - zip size is just barely below 20 MB


NOT boot-tested on Z5 compact ... yet


Features

• SunKernel Logos I.1_2_5 base changes:
• uses updated kernel base (thanks to @GreyLeshy )
• built with 4.9 Linaro Toolchain (newer GCC versions are still tricky to get working with Nougat kernel base and Sony's original kernel sauce)
• enhanced compiler flags [stability & speed]
• using Adreno-Idler to cut down GPU power consumption
• disabled MirrorLink, disabled MobiCore drivers
• lots of hardening (improved security): mm-subsystem, slub, ... more to come
• security: improve security against use-after-free (via slub)
• security, data/system integrity: slub: disable slub_merging to increase stability and avoid memory/data corruption in case of faulty drivers, etc.
• fixed & improved lz4 driver
• mm (memory) subsystem improvements
• enhanced camera driver (speed & reliability)
• disabled KSM (better battery)
• most external drivers are rebuilt externally as modules (compatibility & stability & reliability)
• make a backup of your system (drivers on /system/modules !) before flashing
• readhead enhancements
• writeback enhancements
• swap driver fixes & enhancements
• OOM driver fixes & enhancments
• i2c fixes & enhancements
• irq fixes & improvements
• spi driver fixes & improvements
• kthread fixes & enhancements
• bcmdhd (wlan driver): security updates & improvements
• BCL driver: fixes & improvements
• net/bluetooth: fixes & improvements
• load average (battery & system load): use interruptible wait in various instances
• exfat: use an opensource in-built kernel driver (better performance, reliability & stability with custom kernel)
• touchpad driver fixes & improvements
• fingerprint driver fixes & improvements
• several others
• .
• changes up to SunKernel Logos I.1_5_2 :
• {fixme}
• take a look at github for now

 

[trax7]

ugh - let's hope this one is working fine
...

Kernel for 32.4.A.1.54 (Android Nougat 7.1.1) ROMs


Sauce:
https://github.com/zachariasmaladro...i_r2/commits/32.4.A.1.54_Sun-Kernel_Logos_I.1


Battery life under investigation to match stock kernel,

There should be a detailed instruction on how to build a binary matching kernel to Sony's stock kernel so that we get at least similar battery runtime & smoothness
and get to know how to achieve a most stable kernel, also that's usually the assumed way to comply with GPL

works fine with M-ROM and similar ROMs on Z5 (no UI crashes)


LOL - zip size is just barely below 20 MB


NOT boot-tested on Z5 compact ... yet


Features

Heeyy, you are back nice!! Im gonna test it today :d

Btw... Have we tried actually *disabling* swap..? It uses up some CPU cycles and with moderate use ZRAM = 0 has given me good results in the past day with regards to smoothness and consistent performance.

 

[Scalpos]

Yeah ! That's indeed great to see you back :good:

Why disabling MirrorLink and MobiCore drivers ? Is there any way to enable them, on demand, for test purpose ? According to my understanding, MobiCore is required for MirrorLink, and I'm desperately trying to take advantage of this feature in my vehicule.

Cheers mate and thank you ! Will definitively upgrade my dear Z5C still running on 6.0.1

 

[trax7]

@zacharias.maladroit this is what I was talking about in my previous post - Messenger and Chrome are running in the background, as are Magisk, KA and some more - still I would consider this a light/moderate use and would recommend just for testing purposes

Afaik, with good VM and LMK settings we can achieve greater efficiency without ZRAM, KSM might be needed tho.
What has a higher CPU cost out of those two, afaik its ZRAM..?

 

[zacharias.maladroit]

Heeyy, you are back nice!! Im gonna test it today :d

Btw... Have we tried actually *disabling* swap..? It uses up some CPU cycles and with moderate use ZRAM = 0 has given me good results in the past day with regards to smoothness and consistent performance.

yep, been using it on LineageOS, etc. - it's default there,

I prefer having a swap though - running without swap has issues sometimes - VM will work much differently without it and there's lag & increased latency problems when LMK, OOM, VM, etc. isn't patched up & set up properly

Also: zram is Sony's default - so I'm going with that - not sure if any of the apps not depend on that underneath that (improbable but who knows)

@zacharias.maladroit this is what I was talking about in my previous post - Messenger and Chrome are running in the background, as are Magisk, KA and some more - still I would consider this a light/moderate use and would recommend just for testing purposes

Afaik, with good VM and LMK settings we can achieve greater efficiency without ZRAM, KSM might be needed tho.
What has a higher CPU cost out of those two, afaik its ZRAM..?

KSM is really a battery drainer and it only saves a few pages, perhaps we could try something else ... let's see if I get something else working, in the past there were issues but perhaps now it'll work (needs investigation though).

How did you set that all up (what apps ? what scripts ?),

can you share your settings ?

Interesting suggestion, saving CPU cycles from overhead is certainly great with the (somewhat) inefficient SoC (Snapdragon 810) but with the current ROM I'm on M-ROM it's not that bad actually

Yeah ! That's indeed great to see you back :good:

Why disabling MirrorLink and MobiCore drivers ? Is there any way to enable them, on demand, for test purpose ? According to my understanding, MobiCore is required for MirrorLink, and I'm desperately trying to take advantage of this feature in my vehicule.

Cheers mate and thank you ! Will definitively upgrade my dear Z5C still running on 6.0.1

On demand doesn't really work - it has to be in the kernel.

I've read on the background on MobiCore & MirrorLink and saw that it was really buggy but if it'll work for you (hopefully ?)

why not ? Let's give it a try

It'll be in again the next kernel.

From the looks of it MobiCore is outdated and there's an updated replacement for it (?) but since Sony's Stock relies on it - we'll have to go that route.

qseecom might also need some updating ... later though

 

[zacharias.maladroit]

Logos_I.1_5_3 is up !

Kernel for 32.4.A.1.54 (Android Nougat 7.1.1) ROMs


Sauce:
https://github.com/zachariasmaladro...i_r2/commits/32.4.A.1.54_Sun-Kernel_Logos_I.1


Battery life under investigation to match stock kernel,

There should be a detailed instruction on how to build a binary matching kernel to Sony's stock kernel so that we get at least similar battery runtime & smoothness
and get to know how to achieve a most stable kernel, also that's usually the assumed way to comply with GPL

works fine with M-ROM and similar ROMs on Z5 (no UI crashes)


LOL - zip size is just barely below 20 MB



Features

• SunKernel Logos I.1_2_5 base changes:
• uses updated kernel base (thanks to @GreyLeshy )
• built with 4.9 Linaro Toolchain (newer GCC versions are still tricky to get working with Nougat kernel base and Sony's original kernel sauce)
• enhanced compiler flags [stability & speed]
• using Adreno-Idler to cut down GPU power consumption
• disabled MirrorLink, disabled MobiCore drivers
• lots of hardening (improved security): mm-subsystem, slub, ... more to come
• security: improve security against use-after-free (via slub)
• security, data/system integrity: slub: disable slub_merging to increase stability and avoid memory/data corruption in case of faulty drivers, etc.
• fixed & improved lz4 driver
• mm (memory) subsystem improvements
• enhanced camera driver (speed & reliability)
• disabled KSM (better battery)
• most external drivers are rebuilt externally as modules (compatibility & stability & reliability)
• make a backup of your system (drivers on /system/modules !) before flashing
• readhead enhancements
• writeback enhancements
• swap driver fixes & enhancements
• OOM driver fixes & enhancments
• i2c fixes & enhancements
• irq fixes & improvements
• spi driver fixes & improvements
• kthread fixes & enhancements
• bcmdhd (wlan driver): security updates & improvements
• BCL driver: fixes & improvements
• net/bluetooth: fixes & improvements
• load average (battery & system load): use interruptible wait in various instances
• exfat: use an opensource in-built kernel driver (better performance, reliability & stability with custom kernel)
• touchpad driver fixes & improvements
• fingerprint driver fixes & improvements
• several others
• .
• changes up to SunKernel Logos I.1_5_2 :
• {fixme}
• take a look at github for now
• .
• changes up to SunKernel Logos I.1_5_3 :
• re-add MobiCore & MirrorLink upon demand
• [sumire only] (potentially) fix higher battery drain/consumption, boot failure, stability issues

 

[trax7]

yep, been using it on LineageOS, etc. - it's default there,

I prefer having a swap though - running without swap has issues sometimes - VM will work much differently without it and there's lag & increased latency problems when LMK, OOM, VM, etc. isn't patched up & set up properly

Also: zram is Sony's default - so I'm going with that - not sure if any of the apps not depend on that underneath that (improbable but who knows)



KSM is really a battery drainer and it only saves a few pages, perhaps we could try something else ... let's see if I get something else working, in the past there were issues but perhaps now it'll work (needs investigation though).

How did you set that all up (what apps ? what scripts ?),

can you share your settings ?

Interesting suggestion, saving CPU cycles from overhead is certainly great with the (somewhat) inefficient SoC (Snapdragon 810) but with the current ROM I'm on M-ROM it's not that bad actually

I've always been after the best optimisation, good enough is only acceptable if I hit a huge read block

About ZRAM: Ive been running all day without any issues from it, actually this is the best sustained performance ive had in a while... Random tiny lags while using the keyboard? Gone! I am on stock .54 with Magisk and custom kernel'd.

Settings are as follows: in KA - aggressive preset for LMK, Adaptive LMK off, voltage table adjustments, VM settings from that thread I sent u long ago and thats it! My phone for the first time feels as smooth and responsive as my flatmate's new Razer Phone... And that one has a 120Hz display and SD835...

What do you have in mind as alternatives to KSM..?

Edit: Note that is on GreyLeshy's kernel, I havent tested yours yet..

Edit 2: Sometimes I think like this - how to make it with less levels of complexity? ZRAM is adding a new level of complexity between the RAM and Storage, with the added drawback of CPU time but the benefit of more 'virtual' space. That's one drawback, one benefit 1-1=0, the only thing we are left with is we have so much running code that has unquantifiable benefit but takes up CPU. (I'm taking the race to idle paradigm do the extreme here lol)

Anyway, swap to storage is fine, it was designed like this in the first place and we'd have the LMK and VM as systems that control data going in and out of memory... ZRAM does the same - it's a system that essentially helps with control of data going in and out of memory (I know those systems are totally different but bear with me). We have several systems trying to achieve the same final goal => there is bound to be interference! :laugh:

We have to cut out one of them with the biggest complexity. The VM and LMK can't be just "turned off" or "removed" but ZRAM can...

Another thing, it is arguably easier to play with a finite number of tuneables in the VM and LMK, than to look for and implement better compression algorithms, fix edge cases and lags, race conditions, etc.

If ZRAM causes issues when removed we can just make it very small too...

 

[zacharias.maladroit]

Yeah ! That's indeed great to see you back :good:

Why disabling MirrorLink and MobiCore drivers ? Is there any way to enable them, on demand, for test purpose ? According to my understanding, MobiCore is required for MirrorLink, and I'm desperately trying to take advantage of this feature in my vehicule.

Cheers mate and thank you ! Will definitively upgrade my dear Z5C still running on 6.0.1

@Scalpos

FYI:

looks like I forgot to remove the module block from the kernel

so it won't be able to load the module right now

already unblocked in source, will compile a new kernel once I've worked out the regressions.


That's why I usually avoid releasing a kernel too early:

it doesn't leave me in peace

 

[QWERTYsystems]

How long does it take to fully shut down with Magisk with this kernel?

 

[zacharias.maladroit]

How long does it take to fully shut down with Magisk with this kernel?

"ages" ?

afaik that's a known issue that the phone has a hard time shutting down with Magisk

 

[QWERTYsystems]

"ages" ?

afaik that's a known issue that the phone has a hard time shutting down with Magisk

I know, but with this kernel, I couldn't get it to shut down at all. (Had to use the force shutdown combo every time.)

 

[trax7]

I know, but with this kernel, I couldn't get it to shut down at all. (Had to use the force shutdown combo every time.)

Yeah, you have to wait a big amount of time sometimes. And you cant tell when it happens.

 

[QWERTYsystems]

Yeah, you have to wait a big amount of time sometimes. And you cant tell when it happens.

The phone literally had like 6 hours to shut off! (Noticed I couldn't turn it on when I woke up.)

 

[trax7]

The phone literally had like 6 hours to shut off! (Noticed I couldn't turn it on when I woke up.)

Some app hasnt allowed it to go to sleep - try leaving it on the homescreen before putting it to sleep on ur desk.

 

[zacharias.maladroit]

Logos_I.2_8_7 is up !

Kernel for 32.4.A.1.54 (Android Nougat 7.1.1) ROMs


Z5Compact kernel folder access:

https://drive.google.com/open?id=18ocHx0e1mjsacQKK-z1tUQq-oKbQYrSk

Sauce:
https://github.com/zachariasmaladro...54_Sun-Kernel_Logos_I.1_upcoming_next_03_WIP7

model = device single sim

model_dual = device dual SIM / dsds SIM

dsds = dual SIM dual standby

quick kernel release - so no data


Features