[Galaxy S II Android Development] teksin:
[KERNEL]░█░ Jeffrey-SpeedFrey 3.0.0 ░█░ Amazing battery life(!) & more (Update 21/08)

Mod Edit - Thread closed while under investigation

Hello guys,

It's my kernel for the SGS II.

I am very surprised with the battery life.

With my own experience (with Batista ROM, the best for me): The battery is still 100% after 8 hours sleep (wifi ON, data ON) :eek: :eek:

The kernel works very great. Stable, fast, no reboot or freeze. Tested with some roms. Stress test successfully done without reboot or freeze.

The kernel has these frequencies: 1204 / 1150 / 1100 / 1000 / 800 / 500 / 200 mhz. Compatible with SetCPU (auto detect).

IMPORTANT​

For versions 2.2.0 and lower : there are 3 versions. Release Version, Workaround Version and Stock Voltage Version.

For versions 3.0.0 and higher : there are 2 versions. Release Version and Workaround Version.

Try only Workaround Version or Stock Voltage Version if you have issues with Release Version.

You can install this kernel with Odin (in PDA) or CWM Zip installer (since 2.1.0).

AFTER the kernel has been flashed please calibrate your battery.

My goal: Battery life and Optimization. :cool:

More optimizations and options in the future. Kernel continuously updated.

Jeffrey-SpeedFrey_Kernel 3.0.0​

​

This kernel is optimized and uses low ram. The boot is very fast and everything is very smooth and fast.

Impressive battery life while using your mobile phone.​

FEATURES (for more details, look changelog) :

Undervolted (CPU and GPU) (not compatible with the SETCPU control voltage because the kernel is optimized with my own values)

Workaround version available (less undervolted)

Stock voltage version available

SetCPU compatible (1204/1150/1100/1000/800/500/200 mhz)

BFQ-V2 Scheduler added and set by default

838 MB ram memory available

CIFS support (cifs.ko and slow-work.ko automatically integrated in "/lib/modules")

BLN support

Vitalij's touchscreen fix (value : 10)

Rooted

CWM 4.0.1.4

Interactive governor

Disable some debugging options / look changelog (better battery life, better ram usage and smoothness)

Some tweaks / look changelog (better battery life, better ram usage and smoothness)

Initd.d support

I/O scheduler tweaks

Low ram usage

Optimized for battery life

Changelog 3.0.0 :​

SetCPU compatible (1204/1150/1100/1000/800/500/200 mhz)

BFQ-V2 Scheduler added and set by default

838 MB ram memory available

Increased smoothness with ram optimization

Increased battery life when the phone is on sleep with cpufreq.c optimization

Disabled Config_bugverbose (more memory, better smoothness and better battery life)

Disabled Bug() (optimize memory usage, better smoothness and better battery life)

Unnecessary developer options disabled (optimize memory usage)

General optimization for battery life

Thanks to all beta testers

At the bottom of the page screenshots of stability test.

Try only Workaround Version or Stock Voltage Version if you have issues with Release Version.

Mod Edit: Download links removed.

Changelog 2.2.0 :​

BLN support

Vitalij's touchscreen fix

Try only Workaround Version or Stock Voltage Version if you have issues with Release Version.

Mod Edit: Download links removed.

Changelog 2.1.0 :​

CIFS support

Init.d support

Low ram usage (optimized)

Increased battery life with kernel optimization

Increased performance

Increased kernel stability

Switched to SLAB

CONFIG_STACKTRACE disabled

CONFIG_CGROUP_DEBUG disabled

CONFIG_DEBUG_FS disabled

CONFIG_DEBUG_USER disabled

Switched to Linaro 4.5.2 GCC toolchain

Compiler optimization

Try only Workaround Version or Stock Voltage Version if you have issues with Release Version.

Mod Edit: Download links removed.

Changelog 2.0.0 :​

Disabled CONFIG_FTRACE

Disabled CPU FREQUENCY TRANSLATION STATS

Disable Kernel-debugging (better battery life and smoothness)

Disabled SLAB-debugging support (better battery life)

FIXED reboot and freeze (stable)

Try only Workaround Version or Stock Voltage Version if you have issues with Release Version.

Download (Release 2.0.0) / better battery life : View attachment 687183

Download (Workaround 2.0.0) : View attachment 687184

Download (Stock Voltage 2.0.0) : View attachment 687684

Stability test (3.0.0 / classic test) :

Stability test (3.0.0 / scaling test) :

RAM usage (2.2.0) :

Battery usage (2.2.0) :

Thanks to Hardcore (Speedmod) for his initramfs.