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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2008-02-14 06:16:13 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-14 06:16:13 +0100 |
| commit | fe8e288a63f2f3c51c288500282d0eb5cd26a534 (patch) | |
| tree | f2d0178448df4367ce3692e4b0a4ebb3f7dcbd4e /Documentation/cpuidle/core.txt | |
| parent | ACPI, cpuidle: Clarify C-state description in sysfs (diff) | |
| download | linux-fe8e288a63f2f3c51c288500282d0eb5cd26a534.tar.xz linux-fe8e288a63f2f3c51c288500282d0eb5cd26a534.zip | |
cpuidle: Add Documentation
Documentation for cpuidle infrastructure. (resend)
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation/cpuidle/core.txt')
| -rw-r--r-- | Documentation/cpuidle/core.txt | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/cpuidle/core.txt b/Documentation/cpuidle/core.txt new file mode 100644 index 000000000000..63ecc5dc9d8a --- /dev/null +++ b/Documentation/cpuidle/core.txt @@ -0,0 +1,23 @@ + + Supporting multiple CPU idle levels in kernel + + cpuidle + +General Information: + +Various CPUs today support multiple idle levels that are differentiated +by varying exit latencies and power consumption during idle. +cpuidle is a generic in-kernel infrastructure that separates +idle policy (governor) from idle mechanism (driver) and provides a +standardized infrastructure to support independent development of +governors and drivers. + +cpuidle resides under drivers/cpuidle. + +Boot options: +"cpuidle_sysfs_switch" +enables current_governor interface in /sys/devices/system/cpu/cpuidle/, +which can be used to switch governors at run time. This boot option +is meant for developer testing only. In normal usage, kernel picks the +best governor based on governor ratings. +SEE ALSO: sysfs.txt in this directory. |