[KERNEL] vz-oc-linaro kernel v4: CM10.1 overclocking kernel - Linaro build

vanja_z · Dec 27, 2012

Introduction
This is a replacement kernel for CyanogenMod 10 and 10.1 evita builds. The kernel is designed to be as close as possible to the stock CyanogenMod kernel with a few improvements.

Linaro toolchain:
The kernel is compiled with the latest Linaro toolchain based on gcc 4.7 rather than the default Android toolchain. This may provide performance improvements in some situations. I have made a few patches applied to make it compatible with gcc 4.7.

Overclock:
The highest frequency now available under Settings -> Performance with these kernels is,

Code:

CPU: 1782 MHz 1.25 V
L2:  1350 MHz 1.15 V
BUS:  532 MHz

I've also included a modified thermald.conf in the flashable zip.

Refresh rate:
I've reverted the refresh rate to the original value from the sense source code (57 Hz). This works better when "Disable HW overlays" is selected.

Downloading and installing
Download the flashable zip,

cm10.1_vz-oc-linaro.4.zip MD5=7233ccffa17fa16a2dc6292ecf755fb4
mega.co.nz
ubuntuone.com

Older versions:
cm10.1_vz-oc-linaro.3.zip MD5=5e0efdfd0390f3f923090a574d142808
mega.co.nz
ubuntuone.com
cm10.1_vz-oc.2.zip MD5=cf2c4ee8ba09627e598b78dcea225d39
cm10.1_vz-oc-linaro.2.zip MD5=2931cc59515949fa461a89ea17c99328
vz-oc.1.zip MD5=2f1740d67cd1d5c02a7ac5489bafe7a0
vz-oc.2.zip MD5=4e4d444130e8eb71c27cc23fed65fc88
vz-oc-linaro.1.zip MD5=ca674641e05595e64698afda8aa02943
vz-oc-linaro.2.zip MD5=2b01472d00e069c53f934c30b49475d1
cm10.1_vz-oc.1.zip MD5=576db9e99b2289dae7fc5b548a0d61b4
cm10.1_vz-oc-linaro.1.zip MD5=1a5f3b50608e6b44da50829b2c04ec5c

If you have HBOOT earlier than 1.14 or have S-OFF, then you can just flash the zip from recovery. This will flash the kernel as well as all required modules and thermald.conf. Otherwise, HBOOT 1.14 users will need to extract the boot.img, enter bootloader mode and run

Code:

fastboot flash boot boot.img

Then you will also need to flash the zip to get modules and themald.conf.

Compatability
cm10.1_vz-oc-linaro.4 is compatible with CM10.1 UNOFFICIAL build from 16/04/2013 onwards.
cm10.1_vz-oc-linaro.3 is compatible with CM10.1 NIGHTLY build from 01/03/2013 onwards.
cm10.1_vz-oc.2 (and linaro) are compatible with CM10.1 NIGHTLY build from 19/02/2013 only.
cm10.1_vz-oc.1 (and linaro) are compatible with CM10.1 UNOFFICIAL build from 06/02/2013 only.
vz-oc.2 (and linaro) are compatible with CM10 NIGHTLY builds from 26/12/2012 to 13/01/2013.
vz-oc.1 (and linaro) are compatible with CM10 NIGHTLY builds from 28/11/2012 to 25/12/2012.

Future development
I hope to introduce GPU overclocking soon and there will be updated builds as
soon as changes come into the main CyanogenMod repo.

Building the kernel
For those who would like to build the kernel themselves, here are some basic
instructions. First you will need to acquire some tools. You can get the default
toolchain from the CM10 source code at,

Code:

system/prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/

Otherwise, if you want to use the Linaro toolchain, you can get it at
Linaro toolchain
You will also need a working boot image to get the ramdisk from. You can build
mkbootimg using these instructions
building mkbootimg
Finally, you can get split_bootimg_pl from William Encks site
download split_bootimg_pl
Clone the repo and change to your desired branch

Code:

git clone https://github.com/vanja-zecevic/android_kernel_htc_msm8960.git
git checkout jellybean-oc

Now export an environmental variable pointing to your desired toolchain

Code:

export CCOMPILER=$PATH_TO_TOOLCHAIN/bin/arm-eabi-

Copy the config file, run menuconfig once and start the build replacing -j12
with your desired number of threads

Code:

cp ./config-oc ./.config
make ARCH=arm SUBARCH=arm CROSS_COMPILE=$CCOMPILER menuconfig
make ARCH=arm SUBARCH=arm CROSS_COMPILE=$CCOMPILER -j12

Extract a ramdisk from a working boot image and repack with your freshly built
kernel using the following command for cm10,

Code:

./split_bootimg_pl ./boot.img
./mkbootimg --base 0x80400000 --ramdiskaddr 0x81800000 \
  --cmdline 'console=ttyHSL0,115200,n8' \
  --kernel arch/arm/boot/zImage --ramdisk boot.img-ramdisk.gz \
  -o boot_vz-oc.img

cm10.1 will need the following cmdline

Code:

--cmdline 'console=ttyHSL0,115200,n8  androidboot.hardware=qcom'

You are ready to flash your new kernel!

Contact
I hope you enjoy using this kernel! Please also visit the github page for this project for alternative download links and for the source code.

GitHub

Cheers,
Vanja

mlaws90 · Dec 27, 2012

Looks good will give it a shot next time I'm on a CM10 based ROM. Will this only work on CM10 or will it work with other AOSP builds too?

Sent from my HTC One X using Tapatalk 2

superchilpil · Dec 27, 2012

1. Could you post flash able zips for the majority of us who can flash these in recovery?

2. Very few users including myself have issues with kernels without stock voltage values. The device will just not boot, any way to have separate versions without different voltages just to rule that issue out when people ask why their device won't boot?

Sent from my One X using Tapatalk 2

badvcr · Dec 27, 2012

superchilpil said:
1. Could you post flash able zips for the majority of us who can flash these in recovery?

2. Very few users including myself have issues with kernels without stock voltage values. The device will just not boot, any way to have separate versions without different voltages just to rule that issue out when people ask why their device won't boot?

Sent from my One X using Tapatalk 2

+1 thank you

Straight talked from my HOX!

Koizuma · Dec 27, 2012

I like the idea of a stockish CM10 OC kernel, Me myself i underclock. I would give this a go see how it holds up. the increase in clock speed is usually a nice thing to have even if not used. Also a 2.0GHz version would be awesome too.

rohan32 · Dec 27, 2012

Nice job!

Sent from my Nexus 7

superchilpil · Dec 29, 2012

ChummyDays said:
Fastboot flash boot boot.img

Sent from my One X using Tapatalk

Sent from my One X using Tapatalk 2

Re read my post, I know how to use fastboot

Sent from my One X using Tapatalk 2

vanja_z · Dec 29, 2012

Thanks for the feedback people!

I'm currently running HBOOT 1.14, so I will need to downgrade to 1.09 before I can make/test flashable kernel zips. I think I will get around to this in the next week.

I will also look into some other requests.

Is anyone running the kernel? Are you happy with it? Any benchmarks?

vanja_z · Dec 29, 2012

rohan32 said:
Nice job!

Thanks Rohan, I was inspired by your work!

xyrovice · Dec 31, 2012

Quick question: Sweep2Wake support?

I know OP stated 'as close to stock as possible,' searched thread for 'sweep' and turned up nuffin, so I'm just curious. Glad to see another kernel option (and prospective CM10 material!).

taylor.fowler · Dec 31, 2012

superchilpil said:
1. Could you post flash able zips for the majority of us who can flash these in recovery?

2. Very few users including myself have issues with kernels without stock voltage values. The device will just not boot, any way to have separate versions without different voltages just to rule that issue out when people ask why their device won't boot?

Sent from my One X using Tapatalk 2

I don't plan on maintaining them, but if newer versions come out, just rename to boot.img and swap out the file in the zips:

With Linaro toolchain
without Linaro toolchain

Vanja, if you want these gone, let me know.

nespid · Jan 12, 2013

hands on CM boot screen animation

running stable build cm10, and like the title says, hangs on boot screen animation. Do you have to configure the thermald.conf first?

thanks

vanja_z · Jan 13, 2013

taylor.fowler said:
I don't plan on maintaining them, but if newer versions come out, just rename to boot.img and swap out the file in the zips:

Thanks Taylor! I've included zips now.

vanja_z · Jan 13, 2013

nespid said:
running stable build cm10, and like the title says, hangs on boot screen animation. Do you have to configure the thermald.conf first?

thanks

Hi nespid, unfortunately, these kernels currently only support builds from 28/11/2012 onward. I've re-written the "Compatibility" section to make that more clear.

I will put up a build compatible with the "stable" build in a few days if you like.

nespid · Jan 13, 2013

vanja_z said:
Hi nespid, unfortunately, these kernels currently only support builds from 28/11/2012 onward. I've re-written the "Compatibility" section to make that more clear.

I will put up a build compatible with the "stable" build in a few days if you like.

That would be absolutely great!

Thank you!

Sent from my HTC One X+ using xda app-developers app

warp64 · Jan 31, 2013

just wondering ,when and if are you goin make one for cm10.1? because the one for cm10 just flatout smokes :good! really makes your phone move!! :good:

hv6478 · Feb 7, 2013

Re: [KERNEL] vz-oc kernel: CM10 overclocking, normal & Linaro builds

Any feedback on battery life with this one? And how does it play with No Frills CPU and such?

Thanks for the hard work!

Sent from my CM10ified Beast (a.k.a. HTC One XL)

vanja_z · Feb 9, 2013

I've put up cm10.1 kernels!

ps. cm10.0 stable kernel is coming soon, I haven't forgotten, sorry for the delay

hv6478 · Feb 12, 2013

vanja_z said:
I've put up cm10.1 kernels!

ps. cm10.0 stable kernel is coming soon, I haven't forgotten, sorry for the delay

That's awesome, I will be testing this soon. I know it was asked before but I'm also very interested to know, any plans on implementing sweep2wake? After using it for even a little bit it spoils you, it really is an awesome feature. Otherwise thank you for your hard work, I'll leave feedback in a couple days after testing!

macropterous · Feb 12, 2013

Thanks much, got the kernel running on CM10.1 with 1.14 hboot no problems. Modified thermald.conf and seems to allow oc to stick thus far.

great work,
dbd

UPDATE: this kernel is working wonderfully with cm10.1. +1 for linaro toolchain.

[KERNEL] vz-oc-linaro kernel v4: CM10.1 overclocking kernel - Linaro build

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