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-rw-r--r--Documentation/cpuidle/sysfs.txt84
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-
-
- Supporting multiple CPU idle levels in kernel
-
- cpuidle sysfs
-
-System global cpuidle related information and tunables are under
-/sys/devices/system/cpu/cpuidle
-
-The current interfaces in this directory has self-explanatory names:
-* current_driver
-* current_governor_ro
-
-With cpuidle_sysfs_switch boot option (meant for developer testing)
-following objects are visible instead.
-* current_driver
-* available_governors
-* current_governor
-In this case users can switch the governor at run time by writing
-to current_governor.
-
-
-Per logical CPU specific cpuidle information are under
-/sys/devices/system/cpu/cpuX/cpuidle
-for each online cpu X
-
---------------------------------------------------------------------------------
-# ls -lR /sys/devices/system/cpu/cpu0/cpuidle/
-/sys/devices/system/cpu/cpu0/cpuidle/:
-total 0
-drwxr-xr-x 2 root root 0 Feb 8 10:42 state0
-drwxr-xr-x 2 root root 0 Feb 8 10:42 state1
-drwxr-xr-x 2 root root 0 Feb 8 10:42 state2
-drwxr-xr-x 2 root root 0 Feb 8 10:42 state3
-
-/sys/devices/system/cpu/cpu0/cpuidle/state0:
-total 0
--r--r--r-- 1 root root 4096 Feb 8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb 8 10:42 disable
--r--r--r-- 1 root root 4096 Feb 8 10:42 latency
--r--r--r-- 1 root root 4096 Feb 8 10:42 name
--r--r--r-- 1 root root 4096 Feb 8 10:42 power
--r--r--r-- 1 root root 4096 Feb 8 10:42 time
--r--r--r-- 1 root root 4096 Feb 8 10:42 usage
-
-/sys/devices/system/cpu/cpu0/cpuidle/state1:
-total 0
--r--r--r-- 1 root root 4096 Feb 8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb 8 10:42 disable
--r--r--r-- 1 root root 4096 Feb 8 10:42 latency
--r--r--r-- 1 root root 4096 Feb 8 10:42 name
--r--r--r-- 1 root root 4096 Feb 8 10:42 power
--r--r--r-- 1 root root 4096 Feb 8 10:42 time
--r--r--r-- 1 root root 4096 Feb 8 10:42 usage
-
-/sys/devices/system/cpu/cpu0/cpuidle/state2:
-total 0
--r--r--r-- 1 root root 4096 Feb 8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb 8 10:42 disable
--r--r--r-- 1 root root 4096 Feb 8 10:42 latency
--r--r--r-- 1 root root 4096 Feb 8 10:42 name
--r--r--r-- 1 root root 4096 Feb 8 10:42 power
--r--r--r-- 1 root root 4096 Feb 8 10:42 time
--r--r--r-- 1 root root 4096 Feb 8 10:42 usage
-
-/sys/devices/system/cpu/cpu0/cpuidle/state3:
-total 0
--r--r--r-- 1 root root 4096 Feb 8 10:42 desc
--rw-r--r-- 1 root root 4096 Feb 8 10:42 disable
--r--r--r-- 1 root root 4096 Feb 8 10:42 latency
--r--r--r-- 1 root root 4096 Feb 8 10:42 name
--r--r--r-- 1 root root 4096 Feb 8 10:42 power
--r--r--r-- 1 root root 4096 Feb 8 10:42 time
--r--r--r-- 1 root root 4096 Feb 8 10:42 usage
---------------------------------------------------------------------------------
-
-
-* desc : Small description about the idle state (string)
-* disable : Option to disable this idle state (bool)
-* latency : Latency to exit out of this idle state (in microseconds)
-* name : Name of the idle state (string)
-* power : Power consumed while in this idle state (in milliwatts)
-* time : Total time spent in this idle state (in microseconds)
-* usage : Number of times this state was entered (count)