On 28/03/2019 11:22, Quentin Perret wrote: > On Thursday 28 Mar 2019 at 10:13:50 (+0000), Quentin Perret wrote: >> The recently introduced Energy Model (EM) framework manages power cost >> tables for the CPUs of the system. Its only user right now is the >> scheduler, in the context of Energy Aware Scheduling (EAS). >> >> However, the EM framework also offers a generic infrastructure that >> could replace subsystem-specific implementations of the same concepts, >> as this is the case in the thermal framework. >> >> So, in order to prepare the migration of the thermal subsystem to use >> the EM framework, enable it in the default arm64 defconfig, which is the >> most commonly used architecture for IPA. This will also compile-in all >> of the EAS code, although it won't be enabled by default -- EAS requires >> to use the 'schedutil' CPUFreq governor while arm64 defaults to >> 'performance'. >> >> Signed-off-by: Quentin Perret <[email protected]> >> --- >> arch/arm64/configs/defconfig | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig >> index 2d9c39033c1a..3c09bdaaefd3 100644 >> --- a/arch/arm64/configs/defconfig >> +++ b/arch/arm64/configs/defconfig >> @@ -97,6 +97,7 @@ CONFIG_XEN=y >> CONFIG_COMPAT=y >> CONFIG_HIBERNATION=y >> CONFIG_WQ_POWER_EFFICIENT_DEFAULT=y >> +CONFIG_ENERGY_MODEL=n > > Hmm, sorry I turned this to '=n' for testing and forgot to update the > patch. This obviously should be '=y' ...
I did a test without the ENERGY_MODEL config option set, dhrystone and the power_allocator policy on the hikey. The board did not mitigate well and ended up rebooting. May be the cpu cooling Kconfig option should add a SELECT or a DEPENDS on ENERGY_MODEL ? >> CONFIG_ARM_CPUIDLE=y >> CONFIG_CPU_FREQ=y >> CONFIG_CPU_FREQ_STAT=y >> -- >> 2.21.0 >> -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog
