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Tip revision: 60cc43fc888428bb2f18f08997432d426a243338 authored by Linus Torvalds on 16 April 2018, 01:24:20 UTC
Linux 4.17-rc1
Linux 4.17-rc1
Tip revision: 60cc43f
core.txt
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.