[v4,1/3] arm64: defconfig: Enable CONFIG_ENERGY_MODEL
diff mbox series

Message ID 20190515082318.7993-2-quentin.perret@arm.com
State Changes Requested, archived
Headers show
Series
  • Make IPA use PM_EM
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Commit Message

Quentin Perret May 15, 2019, 8:23 a.m. UTC
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'.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

Comments

Daniel Lezcano May 15, 2019, 8:46 a.m. UTC | #1
On 15/05/2019 10:23, 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'.
> 
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> Signed-off-by: Quentin Perret <quentin.perret@arm.com>

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

> ---
>  arch/arm64/configs/defconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 2d9c39033c1a..4881a752ab3f 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=y
>  CONFIG_ARM_CPUIDLE=y
>  CONFIG_CPU_FREQ=y
>  CONFIG_CPU_FREQ_STAT=y
>
Quentin Perret May 15, 2019, 9:22 a.m. UTC | #2
On Wednesday 15 May 2019 at 10:46:09 (+0200), Daniel Lezcano wrote:
> On 15/05/2019 10:23, 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'.
> > 
> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> > Signed-off-by: Quentin Perret <quentin.perret@arm.com>
> 
> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Thanks !
Quentin

Patch
diff mbox series

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 2d9c39033c1a..4881a752ab3f 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=y
 CONFIG_ARM_CPUIDLE=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_STAT=y