| Venkatesh Pallipadi | fe8e288 | 2008-02-14 00:16:13 -0500 | [diff] [blame] | 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 |