What does Kernel Tweakig do?

[naidanirt]

found this feature on Android overclock

my current Values are:

Sampling Rate: 46875

Up Threshold (1-100%): 86

Powersave Bias (0-1000): 0

Ignore nice load [ ]

what do these do?
and what would be some good values for these settings?

[Droid-X-Forums]

[AdamTomaino]

found this feature on Android overclock

my current Values are:

Sampling Rate: 46875

Up Threshold (1-100%): 86

Powersave Bias (0-1000): 0

Ignore nice load [ ]

what do these do?
and what would be some good values for these settings?

Sampling rate: How often your CPU "refreshes" to change its clock speed. Lower would theoretically yield better performance with more battery drain but I haven't seen much of a difference

PowerBias: A scaling factor for the "Up Threshold" setting. High values will stretch the battery and yield lesser performance

Up Threshold: the limit that the cpu load must reach before the speed clocks up or down. so lower = faster performance however more battery drain

Ignore nice load [ ]: a bolian (yes/no) expression which decides if certain apps that draw very little cpu power should be skipped when CPU scaling takes place. "1" will stretch the battery further. I have had phantom resets using Ignore nice load [1] on my wife's fascinate.

Important thing to remember is that the Kernal cannot be edited freely with a locked bootloader so Setcpu needs to be rerun everytime you start up your android devices (Dx)

MORE CLEARLY at setcpu's website[http://www.setcpu.com/]:

• Sampling Rate – An interval (in microseconds) at which the governor will poll for updates. When this happens, the governor will decide whether to scale the CPU up or down.
• Up Threshold – Defines a percentage from 1% to 100%. When the CPU load reaches this point, the governor will scale the CPU up.
• Down Threshold (conservative only) – Defines a percentage from 1% to 100%. When the CPU load reaches this point, the governor will scale the CPU down.
• Ignore Nice Load – If this value is “1,” the system will ignore “Nice” processes when deciding to scale up or down.
• Powersave Bias (ondemand only) – Setting this value higher will “bias” the governor toward lower frequencies.