[KERNEL] Backslash

[Obihörnchen]

This is a self compiled Kernel from these sources. It's a fork of the kernel source git plus some performance tweaks and minus a bad patch, which turned out to drain the battery.

The initramfs (source) is a modified CF-Root v4.1 of the KG1.
I added some /proc and /sys tweaks in init.rc (github of the initramfs):

+    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ondemand
+    write /sys/block/mmcblk0/queue/scheduler noop 
+    write /sys/block/mmcblk0/queue/read_ahead_kb 512
+    write /proc/sys/vm/highmem_is_dirtyable 1
+    write /proc/sys/vm/dirty_writeback_centisecs 1500
+    write /proc/sys/vm/laptop_mode 5

This probably works best with Villain ROM 2.0 [2.3.4] and the XXKG1 radio image.


History:

Version 1.1:

• added touchscreen fix suggested by vincenzo91.

Version 1.2 :

• now based on CF-Root 4.1 (was 4.0)
• cherry-pick'ed some fixes from cfs-exp branch of ninphetamine github
• removed "setprop dalvik.vm.execution-mode int:fast", which prevents JIT
• changed touchscreen MOVHYSTI to 5 from 0 (15 original)

Version 1.3 :

• removed bogus /sys, /proc settings
• use /init from KG1/CF-ROOT
• set readahead to 512kb
• enabled fuse, so you can use "ntfs-3g" to mount a NTFS drive
  
  There is also a variant with MOVHYSTI set to "0" (Backslash-1.3-HYST0). Let me know, if you have those touchscreen problems with either "0" (HYST0) or the "5" in the normal kernel.

So how does it look like? See the attached image (FastDormancy was not turned off, because it got better in 2.3.4)

Benchmark CF-Bench Pro v1.1
Interpretation left to the reader...

Stock CF-Root KG1:          |    Backslash-1.3:
Native:    11256    11478    11172 |    11566    11360    11414
Java:    3155    3235    3071  |    3411    3240    3327
Overall:6395    6532    6311  |    6673    6488    6561

read:     553    535    540   |    564    571    570
write:     138    180    176   |    181    181    173

[20110713][Backslash-1.1 XXKG1][CF-Root v4.0] Kernel - No more battery drain - xda-developers

 

[BananenAffe]

Habe mir den vorhin auch mal geflasht.Bin aber wieder zum CF-Root Kernel zurück.

Der Kernel soll ja auch angeblich den Akku Drain beheben.Nicht das ich wirklich einen Akku Drain hätte,aber meine Android OS Werte sind seit der 2.3.4 doch schon höher geworden.Nach dem flashen vom Kernel und Wipe Cash sowie Wipe Dalvik hat sich an meinen werten nix verändert.Da kann ich auch beim Cf-Root Kernel bleiben.