Here you can find some tutorials about kernel features. Youtube channel(if you have troubles).
add cpu governor
ps: What is not mentioned in the video is the new linaro 4.9.1;
How to: Add another io scheduler
+Default IO Scheduler+Enable/disable IO Scheduler via menuconfig
How to: Cpu Overclock Snapdragon CPU
Upgrading a Kernel
+ part 2: Remember, just part 1 it's useful. part 2 it;s just just to give you an idea of how I proceeded.