Based on kernel version 3.9. Page generated on 2013-05-02 22:56 EST.
1 2 3 4 Supporting multiple CPU idle levels in kernel 5 6 cpuidle governors 7 8 9 10 11 cpuidle governor is policy routine that decides what idle state to enter at 12 any given time. cpuidle core uses different callbacks to the governor. 13 14 * enable() to enable governor for a particular device 15 * disable() to disable governor for a particular device 16 * select() to select an idle state to enter 17 * reflect() called after returning from the idle state, which can be used 18 by the governor for some record keeping. 19 20 More than one governor can be registered at the same time and 21 users can switch between drivers using /sysfs interface (when enabled). 22 More than one governor part is supported for developers to easily experiment 23 with different governors. By default, most optimal governor based on your 24 kernel configuration and platform will be selected by cpuidle. 25 26 Interfaces: 27 extern int cpuidle_register_governor(struct cpuidle_governor *gov); 28 extern void cpuidle_unregister_governor(struct cpuidle_governor *gov); 29 struct cpuidle_governor