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| author | Javi Merino <javi.merino@arm.com> | 2015-03-02 17:17:19 +0000 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2015-05-04 21:27:52 -0700 |
| commit | 6b775e870c56c59c3e16531ea2307b797395f9f7 (patch) | |
| tree | 40cceadc9fd3cfc6f30efe8b90db92c703ea7e00 /drivers/thermal/Kconfig | |
| parent | c36cf07176316fbe6a4bdbc23afcb0cbf7822bf2 (diff) | |
| download | lwn-6b775e870c56c59c3e16531ea2307b797395f9f7.tar.gz lwn-6b775e870c56c59c3e16531ea2307b797395f9f7.zip | |
thermal: introduce the Power Allocator governor
The power allocator governor is a thermal governor that controls system
and device power allocation to control temperature. Conceptually, the
implementation divides the sustainable power of a thermal zone among
all the heat sources in that zone.
This governor relies on "power actors", entities that represent heat
sources. They can report current and maximum power consumption and
can set a given maximum power consumption, usually via a cooling
device.
The governor uses a Proportional Integral Derivative (PID) controller
driven by the temperature of the thermal zone. The output of the
controller is a power budget that is then allocated to each power
actor that can have bearing on the temperature we are trying to
control. It decides how much power to give each cooling device based
on the performance they are requesting. The PID controller ensures
that the total power budget does not exceed the control temperature.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/Kconfig')
| -rw-r--r-- | drivers/thermal/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 30aee81e9f5b..a1b43eab0a70 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -71,6 +71,14 @@ config THERMAL_DEFAULT_GOV_USER_SPACE Select this if you want to let the user space manage the platform thermals. +config THERMAL_DEFAULT_GOV_POWER_ALLOCATOR + bool "power_allocator" + select THERMAL_GOV_POWER_ALLOCATOR + help + Select this if you want to control temperature based on + system and device power allocation. This governor can only + operate on cooling devices that implement the power API. + endchoice config THERMAL_GOV_FAIR_SHARE @@ -99,6 +107,13 @@ config THERMAL_GOV_USER_SPACE help Enable this to let the user space manage the platform thermals. +config THERMAL_GOV_POWER_ALLOCATOR + bool "Power allocator thermal governor" + select THERMAL_POWER_ACTOR + help + Enable this to manage platform thermals by dynamically + allocating and limiting power to devices. + config CPU_THERMAL bool "generic cpu cooling support" depends on CPU_FREQ |