| Message ID | 20220321095729.20655-3-lukasz.luba@arm.com |
|---|---|
| State | New |
| Headers | show |
| Series | Introduce support for artificial Energy Model | expand |
On Monday 21 Mar 2022 at 09:57:23 (+0000), Lukasz Luba wrote: > From: Pierre Gondois <Pierre.Gondois@arm.com> > > The Energy Model (EM) can be used on platforms which are missing real > power information. Those platforms would implement .get_cost() which > populates needed values for the Energy Aware Scheduler (EAS). The EAS > doesn't use 'power' fields from EM, but other frameworks might use them. > Thus, to avoid miss-usage of this specific type of EM, introduce a new > flags which can be checked by other frameworks. > > Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com> > Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> > --- > include/linux/energy_model.h | 5 +++++ > kernel/power/energy_model.c | 2 ++ > 2 files changed, 7 insertions(+) > > diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h > index 0a3a5663177b..92e82a322859 100644 > --- a/include/linux/energy_model.h > +++ b/include/linux/energy_model.h > @@ -67,11 +67,16 @@ struct em_perf_domain { > * > * EM_PERF_DOMAIN_SKIP_INEFFICIENCIES: Skip inefficient states when estimating > * energy consumption. > + * > + * EM_PERF_DOMAIN_ARTIFICIAL: The power values are artificial and might be > + * created by platform missing real power information > */ > #define EM_PERF_DOMAIN_MILLIWATTS BIT(0) > #define EM_PERF_DOMAIN_SKIP_INEFFICIENCIES BIT(1) > +#define EM_PERF_DOMAIN_ARTIFICIAL BIT(2) > > #define em_span_cpus(em) (to_cpumask((em)->cpus)) > +#define em_is_artificial(em) ((em)->flags & EM_PERF_DOMAIN_ARTIFICIAL) > > #ifdef CONFIG_ENERGY_MODEL > #define EM_MAX_POWER 0xFFFF > diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c > index 0153b0ca7b23..6ecee99af842 100644 > --- a/kernel/power/energy_model.c > +++ b/kernel/power/energy_model.c > @@ -384,6 +384,8 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, > > if (milliwatts) > dev->em_pd->flags |= EM_PERF_DOMAIN_MILLIWATTS; > + else if (cb->get_cost) > + dev->em_pd->flags |= EM_PERF_DOMAIN_ARTIFICIAL; > > em_cpufreq_update_efficiencies(dev); > Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com> > -- > 2.17.1 >
diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h index 0a3a5663177b..92e82a322859 100644 --- a/include/linux/energy_model.h +++ b/include/linux/energy_model.h @@ -67,11 +67,16 @@ struct em_perf_domain { * * EM_PERF_DOMAIN_SKIP_INEFFICIENCIES: Skip inefficient states when estimating * energy consumption. + * + * EM_PERF_DOMAIN_ARTIFICIAL: The power values are artificial and might be + * created by platform missing real power information */ #define EM_PERF_DOMAIN_MILLIWATTS BIT(0) #define EM_PERF_DOMAIN_SKIP_INEFFICIENCIES BIT(1) +#define EM_PERF_DOMAIN_ARTIFICIAL BIT(2) #define em_span_cpus(em) (to_cpumask((em)->cpus)) +#define em_is_artificial(em) ((em)->flags & EM_PERF_DOMAIN_ARTIFICIAL) #ifdef CONFIG_ENERGY_MODEL #define EM_MAX_POWER 0xFFFF diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 0153b0ca7b23..6ecee99af842 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -384,6 +384,8 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, if (milliwatts) dev->em_pd->flags |= EM_PERF_DOMAIN_MILLIWATTS; + else if (cb->get_cost) + dev->em_pd->flags |= EM_PERF_DOMAIN_ARTIFICIAL; em_cpufreq_update_efficiencies(dev);