[KERNEL][REF][Q&A] Siyah 5.0+[ICS/CM10] 6.0b5+[JB/CM10.1] +DISCUSSION+. NON-DEV!!!

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THE RED BLUR

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Mar 7, 2012
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I should add im on Alliance rom too and auto flash works for me. :)

SIGNATURE


PHONE : SGSII
Sent via: Tapatalk 2
Main ROM: Alliance rom v5.1

KERNEL : Siyah v6.0b3 test version
(DEFAULT PROFILE AND SETTINGS)
MODEM :
BATTERY : Stock 1650mAh
EXTERNAL Sdcard : Samsung Class 10 32gb


 

gokhanmoral

Retired Senior Recognized Developer
Mar 16, 2006
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Coming from jeboo kernel nba 2k13 is silky smooth but when i flash siyah 3b it stutters on every frame making game unplayable. On s tweaks its default

Sent from my GT-I9100 using xda premium

Try changing gpu frequencies using stweaks. Samsung defaults are 160, 267 while siyahkernel has 5 steps starting from 66 to save battery.

Sent from my LT30p using Tapatalk 2
 

OGroteKoning

Senior Member
Dec 26, 2011
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Okay... Mine does not make the governor change permanent. But when I do the governor setting in SetCPU, and tick the set at boot tickbox, I get the new governor directory. Others can test to see if is the same for them. But I don't think it is Siyah that effects the change but rather SetCPU.

Aaaaaand a Merry Christmas to you all. May you have a love filled day with your family and friends

Sent from my Galaxy S2
 
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hyperthrust

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Dec 7, 2012
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Okay... Mine does not make the governor change permanent. But when I do the governor setting in SetCPU, and tick the set at boot tickbox, I get the new governor directory. Others can test to see if is the same for them. But I don't think it is Siyah that effects the change but rather SetCPU.

Aaaaaand a Merry Christmas to you all. May you have a love filled day with your family and friends

Sent from my Galaxy S2

I can confirm and ran the test and applied the governer via set cpu and it was retained on reboot.

:)

Also tried with voltage control but it didn't work with that just set cpu.

Sent from my GT-I9100 using xda premium
 
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pilgrim011

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May 3, 2008
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Try changing gpu frequencies using stweaks. Samsung defaults are 160, 267 while siyahkernel has 5 steps starting from 66 to save battery.

Sent from my LT30p using Tapatalk 2
What's also interesting - the music player (stock) stutters from time to time - I have observed this from beta 2 until this morning on beta 3. I wonder what's causing this - no such problems on LSJ kernel - everything runs smooth. P.S. I haven't changed anything regarding governers, voltages, underclock etc. in Stweaks - everything default.
 

Sun90

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Oct 1, 2011
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What's also interesting - the music player (stock) stutters from time to time - I have observed this from beta 2 until this morning on beta 3. I wonder what's causing this - no such problems on LSJ kernel - everything runs smooth. P.S. I haven't changed anything regarding governers, voltages, underclock etc. in Stweaks - everything default.

try with a different I/O scheduler and see:)
 

gokhanmoral

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for those who lose cpu governor after restart:

can you please check if the same happens with i/o scheduler?

and can you check if you have any scripts in /system/bin/customboot.sh, /system/xbin/customboot.sh, /data/local/customboot.sh or /system/etc/init.d that sets the governor to ondemand?

maybe some dear rom developers have put a script to override stweaks settings because those scripts are run after stweaks settings being applied and some users have reported that the governor change is effective even after a reboot.
 

t-pip

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Oct 26, 2010
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I should add im on Alliance rom too and auto flash works for me. :)

SIGNATURE


PHONE : SGSII
Sent via: Tapatalk 2
Main ROM: Alliance rom v5.1

KERNEL : Siyah v6.0b3 test version
(DEFAULT PROFILE AND SETTINGS)
MODEM :
BATTERY : Stock 1650mAh
EXTERNAL Sdcard : Samsung Class 10 32gb



Really odd. I've reinstalled as well still not working.
Must be something I've done. I'll have a pay when I get some time (probably not today). Hope you all have a great day XDAers.

Phone Details:

Phone: Samsung Galaxy SII i9100

ROM: AllianceROM i9100 JB

Kernel: Siyah
 

gokhanmoral

Retired Senior Recognized Developer
Mar 16, 2006
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www.isyam.bilkent.edu.tr
But if the default is row, and I'm on row, why I don't have that music stuttering when on lsj kernel, using the same row I/O scheduler? I'm asking because someone told me to change I/O scheduler in order to solve music problem, and that doesn't make sense if I am already using the default Samsung I/O...

siyahkernel's default is row.
samsung kernel's default is cfq.
 

FANATLA

Member
Apr 1, 2012
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for those who lose cpu governor after restart:

can you please check if the same happens with i/o scheduler?

and can you check if you have any scripts in /system/bin/customboot.sh, /system/xbin/customboot.sh, /data/local/customboot.sh or /system/etc/init.d that sets the governor to ondemand?

maybe some dear rom developers have put a script to override stweaks settings because those scripts are run after stweaks settings being applied and some users have reported that the governor change is effective even after a reboot.

I have none of these scripts but the cpu governor reverts back to ondemand after reboot in /sys/device/system/cpu/cpufreq/
The STweaks setting remains on "pegasusq".
With i/o scheduler: In /sys/devices/system/cpu/cpuidle/ I always have "current_govenor_ro" whether I adjust to "cfq", "row" or something else.
 

pilgrim011

Senior Member
May 3, 2008
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I have none of these scripts but the cpu governor reverts back to ondemand after reboot in /sys/device/system/cpu/cpufreq/
The STweaks setting remains on "pegasusq".
With i/o scheduler: In /sys/devices/system/cpu/cpuidle/ I always have "current_govenor_ro" whether I adjust to "cfq", "row" or something else.

I can confirm this - in stweaks I/O governer is cfq, but in cpuidle folder it is still ro.
 

Many40

Senior Member
Nov 25, 2009
5,598
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263
for those who lose cpu governor after restart:

can you please check if the same happens with i/o scheduler?

and can you check if you have any scripts in /system/bin/customboot.sh, /system/xbin/customboot.sh, /data/local/customboot.sh or /system/etc/init.d that sets the governor to ondemand?

maybe some dear rom developers have put a script to override stweaks settings because those scripts are run after stweaks settings being applied and some users have reported that the governor change is effective even after a reboot.

Confirm: scheduler (eg. sio) is applied properly from STweaks but after reboot it changed to cfq (I checked content of this file: /sys/block/mmcblk0/queue/scheduler).
I don't have customboot.sh folders in /system/bin/, /system/xbin/, /data/local/ folders neither any scripts in init.d folders which may change governor/i/o scheduler.
 
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  • 86
    hi guys.

    I was away for some time and I didn't read most of the messages lately including the ones in my s3 and xperia threads as well as the discussion threads.
    I have just skipped to the end.
    as you have read in the announcement post of v6.0b5 I know have an s2 (thanks to mbwatson. the device is perfectly working).
    I have tested v6.0b5 on omega rom v20 and yesterday's cm10.1
    I am hoping to release it tonight or tomorrow.
    it is still beta because dualboot needs some more work.
    you can have two cm10.1 or any other cm-based rom but not samsung JB as first or 2nd.
    the changes are not difficult but the repository that I need to clone is big.

    I hope I will add dualbooting in b6 and I will also add some touch2wake patches (implemented by robertobsc. we were talking about it for a long time but his last email is still being kept unread in my mailbox which was sent about a month ago :) )
    then I will spend some time on cypress driver because samsung has changed it a long time ago (and now they have changed it again) but we are still using good-old-messy-driver which has all BLN related changes.

    that's all for now. I doubt I will have time to read and post more, so please give help to those who seek it :)
    70
    I had some time today and merged JB kernel with my modifications.
    there were too many conflicts (because of my previous merges with s3 kernel) and I resolved them in 20-30 minutes.
    I have sent the blindly compiled kernel to a friend and he said that it booted but the modem did not work.
    so, everything is (almost) ready. I just need an s2 for several hours.
    then some time to make dual-boot related changed (I need at least a day)
    I have also put cm10.1 support but I think I will have to remove it because it moves your sdcard contents to a subfolder named 0. multiuser support will create different folders for different users and that will probably break dualboot support.
    so, I will have to find another place to store dual-boot related files.
    69
    can anyone state in a few sentences the very major differences between stock cm10, siyah and dorimanx kernels?
    strong and not so strong points of each of them.

    this would be useful for a large majority of 'not sophisticated' users to make a decision which kernel to choose.

    cm10 is the best kernel for cm10 based ROMs. it is developed by the guys who know what they are doing.

    siyah have some cherrypicks from here and there and some new features. I no longer cherrypick commits that I cannot understand (I used to be doing that a lot). STweaks lets you make some changes easily, without the need of init scripts. siyah supports both samsung and cm roms (except for 10.1) and you can use dualboot feature to have two roms at a time.

    dorimanx's kernel has lots of cherrypicks and he generally tries to catch the latest upstream. I don't understand most of his cherrypicks and he doesn't neither. I guess he trusts the commits from upstream but it may cause instabilities sometimes. however, if those instabilities are fixed those commits may give you some additional performance or even stability (irony? yes). that kernel also have STweaks support and has some more configurables. Dorimanx also uses my commits to support both samsung and cm roms with a single image and also the recovery+initramfs that I modified for dualboot feature. in initramfs there are some more scripts + optimizations some of which I find dangerous and unnecessary but most of them are optional anyway.

    so, if you want to play safe and make sure everything runs as expected use cm10 stock kernel.
    if you want some new features and have time to play with some settings use siyah.
    if you have more time and want to have currently the most benchmark-friendly , fast and up-to-date (considering the cherrypicks from upstream) kernel with some experimental features use dorimanx.
    61
    it is a little unfair to expect people doing something for free and fun to do it very well documented and perfect.

    I never claimed that my work was perfect. indeed, it is not. and I can live with that. also a lot of people can live with that and like it.

    even samsung doesn't do it properly even though you have paid for their product. releasing defective chips, buggy kernels, no commit history, late or sometimes no release for the changes in the kernel (violating gpl), no documentation, no source to support opensource development...

    yeah, I know, some users may flash the latest one on ICS (even on gingerbread, or on another S2 variant) and soft-brick their device. they will have to use odin and nobody should flash any kernels if they cannot take the risk.

    so, dikidera: either you should stop flashing kernels, or I should stop making new ones.
    wanna open a voting poll for it? :p
    58
    sorry guys but I don't have any s2 around.
    as soon as I borrow one I will compile another kernel and also fix dual booting problem with Samsung JB
    I'm also a little busy lately. I am planning to borrow a friend's phone next week for an update.
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