2.7 SmartassV2
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The CPUfreq governor "smartassV2", like other governors, aims to balance
performance vs battery life by using low frequencies when load is low and
ramping the frequency when necessary, fast enough to ensure responsiveness.
The implementation of the governor is roughtly based on the idea of interactive.
The idle loop is used to track when the CPU has idle cycles. The idle loop will
set a relatively high rate timer to sample the load when appropriate, the timer
will measure the load since it was set and schedule a work queue task to do the
actual frequency change when necessary.
The most important tunable is the "ideal" frequency: this governor will aim
for this frequency, in the sense that it will ramp towards this frequency much
more aggresively than beyond it - both when ramping up from below this frequency
and when ramping down from above this frequency. Still, note, that when load is
low enough the governor should choose the lowest available frequency regardless
of the ideal frequency and similarly when load is consistently high enough the
highest available frequency will be used.
Smartass also tracks the state of the screen, and when screen is off (a.k.a
sleep or suspended in the terms of this governor) a different ideal frequency
is used. This is the only difference between the screen on and screen off
states. Proper tuning of the awake_ideal_freq and sleep_ideal_freq should
allow both high responsiveness when screen is on and utilizing the low
frequency range when load is low, especially when screen is off.
Finally, smartass is a highly customizable governor with almost everything
tweakable through the sysfs. For a detailed explaination of each tunable,
please see the inline comments at the begging of the code (smartass2.c).
... anyone got any ideas as to what's going on?
