Messages in this thread Patch in this message | | | From | Douglas RAILLARD <> | Subject | [RFC PATCH v4 2/6] sched/cpufreq: Attach perf domain to sugov policy | Date | Wed, 22 Jan 2020 17:35:34 +0000 |
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Attach an Energy Model perf_domain to each sugov_policy to prepare the ground for energy-aware schedutil.
Signed-off-by: Douglas RAILLARD <douglas.raillard@arm.com> --- kernel/sched/cpufreq_schedutil.c | 41 ++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+)
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index 9b8916fd00a2..09e284dc918a 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -42,6 +42,10 @@ struct sugov_policy { bool limits_changed; bool need_freq_update; + +#ifdef CONFIG_ENERGY_MODEL + struct em_perf_domain *pd; +#endif }; struct sugov_cpu { @@ -66,6 +70,40 @@ static DEFINE_PER_CPU(struct sugov_cpu, sugov_cpu); /************************ Governor internals ***********************/ +#ifdef CONFIG_ENERGY_MODEL +static void sugov_policy_attach_pd(struct sugov_policy *sg_policy) +{ + struct cpufreq_policy *policy = sg_policy->policy; + struct em_perf_domain *pd; + + sg_policy->pd = NULL; + pd = em_cpu_get(policy->cpu); + if (!pd) + return; + + if (cpumask_equal(policy->related_cpus, to_cpumask(pd->cpus))) { + sg_policy->pd = pd; + } else { + pr_warn("%s: Not all CPUs in schedutil policy %u share the same perf domain, no perf domain for that policy will be registered\n", + __func__, policy->cpu); + } +} + +static struct em_perf_domain * +sugov_policy_get_pd(struct sugov_policy *sg_policy) +{ + return sg_policy->pd; +} +#else /* CONFIG_ENERGY_MODEL */ +static void sugov_policy_attach_pd(struct sugov_policy *sg_policy) {} + +static struct em_perf_domain * +sugov_policy_get_pd(struct sugov_policy *sg_policy) +{ + return NULL; +} +#endif /* CONFIG_ENERGY_MODEL */ + static bool sugov_should_update_freq(struct sugov_policy *sg_policy, u64 time) { s64 delta_ns; @@ -859,6 +897,9 @@ static int sugov_start(struct cpufreq_policy *policy) sugov_update_shared : sugov_update_single); } + + sugov_policy_attach_pd(sg_policy); + return 0; } -- 2.24.1
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