Based on kernel version 3.9. Page generated on 2013-05-02 22:56 EST.
1 2 Supporting multiple CPU idle levels in kernel 3 4 cpuidle 5 6 General Information: 7 8 Various CPUs today support multiple idle levels that are differentiated 9 by varying exit latencies and power consumption during idle. 10 cpuidle is a generic in-kernel infrastructure that separates 11 idle policy (governor) from idle mechanism (driver) and provides a 12 standardized infrastructure to support independent development of 13 governors and drivers. 14 15 cpuidle resides under drivers/cpuidle. 16 17 Boot options: 18 "cpuidle_sysfs_switch" 19 enables current_governor interface in /sys/devices/system/cpu/cpuidle/, 20 which can be used to switch governors at run time. This boot option 21 is meant for developer testing only. In normal usage, kernel picks the 22 best governor based on governor ratings. 23 SEE ALSO: sysfs.txt in this directory.