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[KERNEL] [SM-T700 WIFI & T705 LTE] [22 August] SkyHigh TW Kernel [v0.9] [Synapse ++]

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UpInTheAir
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(Last edited by UpInTheAir; 11th July 2014 at 06:12 AM.)
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Default [KERNEL] [SM-T700 WIFI & T705 LTE] [22 August] SkyHigh TW Kernel [v0.9] [Synapse ++]

[KERNEL] [SM-T700 WIFI & T705 LTE] [22 August] SkyHigh TW Kernel [R3_v0.9] [Synapse ++]

8.4" SM-T700 WIFI & T705 LTE TW Exynos 5420 supported in thread only !!

I don't have time to build for any more devices I can't personally test & debug - sorry.


Let get it straight, I am not a real Developer, but I am UpInTheAir, former part time kernel hack of SM-T800/805, SM-N9005 LTE, SGT 7.7 JB & ICS Kernels. I now share with you my Exynos5 TW SM-T700/705 Kernel compiled from official Samsung sources.


* I don't pretend to know everything, so if you can be constructive and help out this project, please do so. You will find allot of answers by searching gitHub, XDA and SEARCH Just like I do ......


>> SCREENSHOTS << from v0.5 : might not be always up-to-date !


FEATURES

Based on official Samsung source: T700OPU1ANG2

ramdisk source: T700KXU1ANG1 & T705XXU1ANG2

Built with Stock ARM Toolchain 4.7

KNOX WARRANTY VOID: 1

SELinux PERMISSIVE

adb insecure

ROM Knox removal via updater-script on flash

init.d script support (drop in script & set permissions to 755 or 777 and reboot)

busybox v1.22.0-Dream-IRC installed to /sbin

Synapse app support for almost all kernel configurations + more !!

Many descriptions are in the app ! If you require more info, don't be lazy, please SEARCH like I did !


SYNAPSE FEATURES

CPU
  • CPU max frequency A15 cores = 2100 MHz (stock/default = 1900 MHz)
  • CPU min frequency A7 cores = 200 MHz (stock/default = 500 MHz)
  • Multi-core power saving control (sched_mc_power_savings)


CPU VOLT
  • Voltage control for:
    big cores
    LITTLE cores


GOV
  • CPU governor
    interactive (default)
    on-demand
    userspace
  • CPU governor tunables


MEMORY
  • I/O Schedulers
    BFQ (default)
    CFQ
    NOOP
    ROW
  • General IO tuneable
  • Int storage scheduler
  • Int storage read-ahead
  • Kernel SamePage Merging (KSM)
    Pages to Scan
    Scan delay interval
  • Dynamic management of dirty page writebacks
  • Virtual memory tuneable


GPU
  • GPU max frequency = 667 MHz (stock/default = 480 MHz)
  • GPU min frequency = 100 MHz (stock/default = 177 MHz)
  • GPU voltage control


DRIVERS
  • PowerSuspend


ADVANCED
  • Low Memory Killer (OOM LMK)
  • Management of not killable processes whitelist
    system apps
    user apps
  • entropy
  • Gentle fair sleepers control
  • randomize_va_space control


THERMAL
  • CPU thermal control
  • GPU thermal control
  • Memory interface thermal control


AUDIO

* WolfsonMicro WM5102 sound control by AndreiLux
  • Mono output
  • HeadPhone equalizer settings


BATTERY
  • Unstable power detection
  • AC mains
  • Standard downstream port
  • Dedicated charging port
  • Charging downstream port
  • Accessory charger adapter
  • Miscellaneous charging
  • MHL power


NETWORK
  • TCP congestion control
    All available enabled.
    Default = westwood+
  • TCP/IP network security
  • TCP/IP network speed
  • GPS region
    Default, Asia, Europe, Oceania, North America, South America, Africa


USB
  • UMS (USB Mass Storage) mode


BACKUP & RESTORE
  • Restore - Delete - Backup
    kernel
    profile


REBOOT
  • Reboot device
  • Reboot Recovery


LOGS
  • Android logger control (disabled)
  • logcat
  • dmesg
  • last_kmsg


xz kernel compression

Reduced logging

Frandom

mount partitions NOATIME and NODIRATIME by default

F2FS support in source and ramdisk (not tested)

exFAT FS support

NTFS R/W support with app

CIFS support

Asynchronous Fsync

/proc/.config.gz support



CREDITS

 

* My family !!
* BeansTown106 & Chainfaire for bringing root
* halaszk88 - initial sysnapse layout & source commits
* AndreiLux - many many contributions to Exynos kernel development & Synapse app
* apbaxel - various synapse controls I've adapted
* faux123 - various patches
* XDA
* Samsung OSRC
* and many others!
* check github source credits
* IF I'VE FORGOTTON ANYONE, PLEASE DON'T BE SHY AND SPEAK UP, THANKS

.


XDA:DevDB Information
SM-T700 WIFI & T705 LTE TW Kernel, Kernel for the Samsung Galaxy Tab S

Contributors
UpInTheAir
Kernel Special Features:

Version Information
Status: Stable
Current Stable Version: v0.9
Stable Release Date: 2014-08-22

Created 2014-07-06
Last Updated 2014-08-21
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UpInTheAir
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(Last edited by UpInTheAir; Yesterday at 04:10 AM.)
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Posts: 4,333
Join Date: Jan 2011
Location: Phuket, Thailand
Database Requirements - installation - download

** DISCLAIMER : FLASH AT YOUR OWN RISK **

WARNING :

* Under-volting can cause instability

* Over-clocking can cause freeze/reboot, heat & damage to CPU, GPU or other hardware

* Any customizations may void warranty

* May not be suitable for your device or customizations

* UpInTheAir is NOT responsible, the person you see in the mirror is !



REQUIREMENTS
  1. SM-T700 WIFI or T705 LTE Exynos device
  2. TW Kit Kat 4.4.2
  3. Rooted
  4. KNOX disabled/removed (if NOT flashing via custom recovery)
  5. TWRP Recovery


CHANGE-LOG
 

v0.9 [22-August-2014]

updater-script :
  • Knox removal

ramdisk :
  • T700: new T700KXU1ANG1 ramdisk (thanks @stitoo )
  • init.rc: added some more boot defaults
  • synapse: Audio: removed Main Speaker amplification & equalizer (only top speaker was boosted)
  • synapse: Drivers: added PowerSuspend control
  • synapse: Memory: added Dynamic Dirty Page Writeback controls
  • synapse: Advanced: added LMK Whitelist control for Do-Not-Kill Processes
  • synapse: various small cleanups
  • init.universal5420.usb.rc: mount F2FS

kernel :
  • Completely rebuilt on newer T700OPU1ANG2 source
  • removed GPU 733 MHz freq step. Max now at 667 MHz (optional)
  • kernel/power/powersuspend: new PM kernel driver for Android w/o earlysuspend v1.2
  • staging: android: lowmemorykiller: Management of not killable processes (read Post #3 )
  • mm: Dynamic management of dirty page writebacks
  • config: enable LAST_KMSG
  • Asynchronous Fsync: initial extraction of Async Fsync from HTC
  • FS: import F2FS


v0.7 [16-August-2014]

ramdisk :
  • T700: new ramdisk from T700XXU1ANF9 (thanks @mitchellvii )
  • T705: new ramdisk from T705XXU1ANG2 (thanks @edan1979 )
  • synapse: Reboot: added reboot & recovery options
  • synapse: removed Audio checkboxes to enable speaker & headphone equalizer settings (enabled by default)

kernel :
  • Completely rebuilt on newer T700XXU1ANF7 source
  • added GPU 733 MHz freq step (optional) will decrease benchmark due to thermal throttle, but what the heck !
  • MALI_DVFS-START FEQ set to 100 MHz (will allow launcher to idel lower & use loads more of user set min GPU freq )
  • Kernel compression mode changed to XZ (smaller zImage & stops kernel flash damaging the Recovery partition )
  • removed useless CPU Performance governor


v0.6 [12-July-2014]

ramdisk :
  • synapse: Network: TCP/IP network security
  • synapse: Network: TCP/IP network speed
  • synapse: Network: GPS region
  • synapse: USB: UMS (USB Mass Storage) mode


v0.5 [11-July-2014]

ramdisk :
  • init.rc: set some Synapse boot defaults
  • synapse: adjustments to various layout options and info
  • synapse: audio controls (some omitted for now)

kernel :
  • WolfsonMicro WM5102 sound control by AndreiLux


v0.4 [10-July-2014]

ramdisk :
  • init.rc: set some Synapse boot defaults
  • synapse: adjustments to various layout options and info
  • synapse: CPU: multi-core power saving control (sched_mc_power_savings)
  • synapse: Advanced: randomize_va_space control
  • /sbin/SkyHigh.sh: enable frandom & fix init.d

kernel :
  • add frandom
  • fs: mount partitions NOATIME and NODIRATIME by default
  • BFQ-v7r4 IO scheduler & set as default)
  • config: enable sched_mc_power_savings for sysfs


v0.3 [09-July-2014]

ramdisk :
  • init.rc: set some Synapse boot defaults
  • synapse: add various layout options and info
  • synapse: CPU general IO tuneable
  • synapse: Virtual memory tuneable
  • synapse: Gentle fair sleepers control (disabled to improve UI performance)
  • synapse: TCP congestion control
  • synapse: Android logger control (disabled)
  • synapse: logs - last_kmsg

kernel :
  • logger: modify for Synapse app checkbox compatibility
  • add sysfs interface for GENTLE_FAIR_SLEEPERS


v0.2 [07-July-2014]

ramdisk :
  • init.rc: set some Synapse boot defaults
  • synapse: add GPU, battery & thermal controls

kernel :
  • cpufreq: allow A15's to 2.1 GHz and A7's to 200 MHz
  • config: enable TCP congestion control & all available algorithms
  • logger: add sysfs interface to enable / disable Android Logger
  • battery: add MAX77803/UNIVERSAL5420 charger control
  • battery: add unstable power detection switch to charger controls
  • battery: properly populate current now, avg, and max output properties
  • battery: expose all MHL currents in charger controls
  • Mali GPU: OC to 677 & UC to 100 MHz
  • Mali GPU: clock & governor control
  • Mali GPU: voltage control
  • mach-exynos: lower regulator buck min voltages
  • exynos_tmu: add configurable interface


Initial Release v0.1 [06-July-2014]

ramdisk :
  • default.prop/init.rc: adb insecure, wifi fix & SELinux permissive
  • add synapse support (initial files ported from halask88 & moddified to suit)

kernel :
  • config: enable /proc/.config.gz support
  • config: enable KSM support
  • config: enable performance CPU governor
  • config: enable USB OTG support
  • config: enable NTFS RW support
  • config: enable CIFS support
  • config: disable DEBUG_INFO
  • add sysfs helpers
  • cpufreq: add Exynos 5420 voltage control



INSTALLATION
  1. Uninstall any CPU control apps, tweaks and scripts etc.
  2. Ensure KNOX is disabled/removed (only if NOT flashing with custom recovery)
  3. Optional: Install Wanam DVFS disabler for greater kernel control
  4. Install Synapse app from Google Play and rate it ☆☆☆☆☆ !!
  5. If busybox is installed: Uninstall your current busybox with https://play.google.com/store/apps/d....busybox&hl=en
  6. Flash with TWRP Recovery
  7. Any issues, please check Posts #1-3 and search the thread BEFORE posting


DOWNLOAD

 

8.4" TF700 WIFI EXYNOS

>> WIFI SkyHigh T700 kernel <<

STOCK T700 WIFI T700KXU1ANG1 kernel (Flashing Stock will wipe your WiFi setings !)

---------------------------------------------------------------------------------------------------

8.4" TF705 LTE EXYNOS

>> LTE SkyHigh T705 kernel <<


STOCK T705 LTE T705XXU1ANG2 kernel (Flashing Stock will wipe your WiFi setings !)



SOURCE
 

>> github <<


.
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UpInTheAir
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(Last edited by UpInTheAir; Yesterday at 03:52 AM.)
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Location: Phuket, Thailand
Question HELP & FAQ

HELP & FAQ


"SYNAPSE BOOT CANCELLED"

 
  1. Wait for the kernel to stabilize and device to cool
  2. Open synapse app
  3. Synapse app menu > select all globally > undo > apply ✔
  4. Re-boot
  5. If still issues > try again after #1
  6. Still issues > Manually set config after boot (open synapse app > syanapse app menu > settings > disable apply on boot)


ISSUES

 
  1. Uninstall any CPU control apps, tweaks and scripts etc.
  2. Uninstall your current busybox with https://play.google.com/store/apps/d....busybox&hl=en
  3. Flash kernel
  4. Boot and allow things to stabilize
  5. Open Synapse & tap :
    1. "understood" message about unstable boot
    2. "select all globally"
    3. "undo" button
    4. "apply" ✔
  6. Reboot and ensure "synapse boot completed" toast message
  7. You should be good to go


BOOT-LOOP

 
  1. Power off & let device cool
  2. Wipe cache & dalvik-cache in recovery (if custom recovery)
  3. Re-flash kernel
  4. Re-boot
  5. Let things stabilize and cool before touching anything


BETTER BATTERY LIFE

 
  1. There are no best settings. User "HABIT" is #1 cause of battery drain, followed by screen, ROM & apps, modem etc
  2. This kernel is built to be balanced with a good mix of battery whilst keeping performance
  • Decrease screen brightness
  • Use dark wallpapers and app themes
  • Check your wakelocks with better battery stats app & use Greenify app to stop unwanted apps self starting and running in the background
  • Suggest:
    CPU 200-1900 MHz -25 mV
    GPU 100-480 MHz -50 mV
    PowerSuspend Driver = Enable
    Dirty Page Writeback = Enable
    CPU Multicore Power Saving = (2) Agressive


BETTER PERFORMANCE

 


CAN I USE OTHER KERNEL CONTROL APPS

 
  • No, many features and options won't be available. Remove all other control apps to avoid conflicts !
  • Synapse is the recommended and has everything you need


HOW TO MONITOR LIVE CPU & GPU VALUES

 
  • CPU load & freq - available RAM - GPU freq - CPU temp - most resource intensive process
  • [APP][2.1+] Cool Tool
  • Download my personal cooltool_presets > unzip & copy folder to INTERNAL sdcard. If you have cool tool app already running, you must disable > overwrite existing folder > enable


LITTLE CORE CPU FREQUENCY

 
  • Real frequency is apparently double that reported by other apps
  • Example: min 200 MHz (real) in Synapse is reported as 100 MHz in SetCPU


RANDOM REBOOT

 
  1. Don't UV or UC CPU or GPU
  2. Use SkyHigh defaults


DOWNLOAD LINK NOT WORKING

 
  1. I want to keep this project all in one place (Thanks to XDA) - ☆☆ NO MIRRORS ☆☆
  2. Please try again in a few minutes


POOR CPU/GPU BENCHMARK or GRAPHICS PERFORMANCE

 
  1. Allow the device to cool. Repetitive testing will heat the device hardware and invoke thermal throttling and lead to decreased benchmark.
  2. HIGH CPU/GPU OC >> excessive heat >> thermal throttling >> reduced clock frequency >> DECREASE PERFORMANCE


DO NOT KILL PROCESSES

 
  1. This feature allows the user to define processes and system processes white-lists filled with the preferred process names and to not be killed by lowmemorykiller, unless it is absolutely necessary.
  2. When a the lowmemorykiller needs to free ram, it will first kill the processes not included inside the two process name lists chosen by the user.
  3. If there are no more standard killable processes, then it will be necessary to kill one of the processes included inside one of the two white-lists, to prevent system hangs, slowdowns, etc.
  4. You can find the [SkyHigh/Synapse] folder on your internal sdcard and add one process name per line. Lists updated on reboot.
  5. Max 25 processes
  6. Example only:
    Code:
    com.ea.games_r3_row
    com.quoord.tapatalkxda.pre.activity


DYNAMIC MANAGEMENT OF DIRTY PAGE WRITEBACKS

 
* [Christopher83]

Quote:
This feature allows to have two different intervals for dirty page
writebacks and to dynamically manage them when the system has been
resumed (it's active) or when has been suspended.

Three new procfs parameters are exposed inside /proc/sys/vm path:
- dynamic_dirty_writeback is the activation status of this feature,
set 1 to enable it, set 0 to disable it and use the standard behaviour
- dirty_writeback_active_centisecs is the interval for the dirty page
writebacks when the system is active (screen on)
- dirty_writeback_suspend_centisecs is the interval for the dirty page
writebacks when the system is suspended (screen off)

This feature is in part inspired on Francisco Franco's patch:
https://github.com/franciscofranco/m...18e7f258a22947


BACKUP & RESTORE

 
  1. If the backup isn't visible, reboot device and ensure for have "synapse boot completed" message. Otherwise synapse won't read the file.
  2. Reboot after applying your new settings
  3. Read "ISSUES" & "SYNAPSE BOOT CANCELLED" above


TCP/IP NETWORK SECURITY

 

* Thanks to zeppelinrox & V6SuperCharger
  1. Hardening the TCP/IP stack to SYN attack
  2. Bump up tw_buckets in case we get DoS'd
  3. Ignore pings
  4. Don't cache connection metrics from previous connection
  5. Don't pass traffic between networks or act as a router
  6. Enable spoofing protection (turn on reverse packet filtering)
  7. Don't accept source routing
  8. Don't accept redirects
- Further reading:
http://www.cyberciti.biz/faq/linux-k...rity-hardening
http://www.symantec.com/connect/arti...ck-syn-attacks


SEGMENTATION FAULT

 
  1. I don't believe it's kernel related, but rather busybox
  2. Try uninstall your ROM busybox with this app. https://play.google.com/store/apps/d...ricson.busybox and reboot.
  3. Re-flash kernel
  4. Use the busybox that comes with the kernel located in /sbin
  5. Also try to update your SuperSu and su binary if it asks and reboot.



..
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UpInTheAir
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#4  
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Posts: 4,333
Join Date: Jan 2011
Location: Phuket, Thailand
Location v0.1 released

v0.1 is now released

Change-log in Post #2.

NOTE: commit credits are in source.

Further instructions in Synapse app & Posts #1-3

Enjoy

Cheers,

UITA

.
THANKS costs nothing.......

N9005 HLTE : Developer of :
 
SkyHigh Kernels for SM-T700/705, SM-N9005 & SGT 7.7 : P6810 - P6800

SkyHigh JB ROMs for SGT 7.7

P6810 + kernel & P6800 (discontinued)

[TWEAK] SGT 7.7 Battery Calibration [Fuel Gauge Reset]

[Guide] Flash Official JB 4.1.2 Firmware on P6810 Wi-Fi Device

+ Many other guides, mods & contributions
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toyanucci
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It would appear most persons here have the sm-t800, the 10.5 with exynox cpu. Sorry I can't test your kernel though, wish I had synapse to configure my display.

Sent from my SM-T800 using Tapatalk
 
ksj0823
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#6  
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Quote:
Originally Posted by toyanucci View Post
It would appear most persons here have the sm-t800, the 10.5 with exynox cpu. Sorry I can't test your kernel though, wish I had synapse to configure my display.

Sent from my SM-T800 using Tapatalk
True. Another tab s 10.5 here. Hope to see the 10.5 one soon.
 
UpInTheAir
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Have CPU OC to 2.1 GHz & UC to 200 MHz (read as 100 in most CPU control apps) working for next release.

Sent from my SM-N9005 using XDA Premium 4 mobile app
THANKS costs nothing.......

N9005 HLTE : Developer of :
 
SkyHigh Kernels for SM-T700/705, SM-N9005 & SGT 7.7 : P6810 - P6800

SkyHigh JB ROMs for SGT 7.7

P6810 + kernel & P6800 (discontinued)

[TWEAK] SGT 7.7 Battery Calibration [Fuel Gauge Reset]

[Guide] Flash Official JB 4.1.2 Firmware on P6810 Wi-Fi Device

+ Many other guides, mods & contributions
 
mitchellvii
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(Last edited by mitchellvii; 6th July 2014 at 12:55 PM.)
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I recommend that you put THIS IS FOR THE LTE MODEL ONLY! in flaming giant red letters to save the flash happy noobs from causing themselves trouble. You mentioned it but you know these guys never read the OP. ☺
 
UpInTheAir
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Quote:
Originally Posted by mitchellvii View Post
I recommend that you put THIS IS FOR THE LTE MODEL ONLY! in flaming giant red letters to save the flash happy noobs from causing themselves trouble. You mentioned it but you know these guys never read the OP. ☺
You're probably right. Will do later, but they'll still miss it. ......


Sent from my SM-N9005 using XDA Premium 4 mobile app
THANKS costs nothing.......

N9005 HLTE : Developer of :
 
SkyHigh Kernels for SM-T700/705, SM-N9005 & SGT 7.7 : P6810 - P6800

SkyHigh JB ROMs for SGT 7.7

P6810 + kernel & P6800 (discontinued)

[TWEAK] SGT 7.7 Battery Calibration [Fuel Gauge Reset]

[Guide] Flash Official JB 4.1.2 Firmware on P6810 Wi-Fi Device

+ Many other guides, mods & contributions
 
will6316
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I thought the lte model uses the snapdragon processor

Sent from my SM-T700 using XDA Premium 4 mobile app

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