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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 |
30 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9