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fe8e288a VP |
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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 |