From: Douglas RAILLARD <douglas.raillard@arm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-pm@vger.kernel.org, mingo@redhat.com, peterz@infradead.org,
rjw@rjwysocki.net, viresh.kumar@linaro.org,
quentin.perret@arm.com, douglas.raillard@arm.com,
patrick.bellasi@arm.com, dietmar.eggemann@arm.com
Subject: [RFC PATCH v2 2/5] sched/cpufreq: Attach perf domain to sugov policy
Date: Thu, 27 Jun 2019 18:16:00 +0100 [thread overview]
Message-ID: <20190627171603.14767-3-douglas.raillard@arm.com> (raw)
In-Reply-To: <20190627171603.14767-1-douglas.raillard@arm.com>
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 | 39 ++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 9c0419087260..0a3ccc20adeb 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -41,6 +41,10 @@ struct sugov_policy {
bool work_in_progress;
bool need_freq_update;
+
+#ifdef CONFIG_ENERGY_MODEL
+ struct em_perf_domain *pd;
+#endif
};
struct sugov_cpu {
@@ -65,6 +69,38 @@ 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 em_perf_domain *pd;
+ struct cpufreq_policy *policy = sg_policy->policy;
+
+ 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;
@@ -850,6 +886,9 @@ static int sugov_start(struct cpufreq_policy *policy)
sugov_update_shared :
sugov_update_single);
}
+
+ sugov_policy_attach_pd(sg_policy);
+
return 0;
}
--
2.22.0
next prev parent reply other threads:[~2019-06-27 17:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-27 17:15 [RFC PATCH v2 0/5] sched/cpufreq: Make schedutil energy aware Douglas RAILLARD
2019-06-27 17:15 ` [RFC PATCH v2 1/5] PM: Introduce em_pd_get_higher_freq() Douglas RAILLARD
2019-06-27 17:16 ` Douglas RAILLARD [this message]
2019-06-27 17:16 ` [RFC PATCH v2 3/5] sched/cpufreq: Hook em_pd_get_higher_power() into get_next_freq() Douglas RAILLARD
2019-06-27 17:16 ` [RFC PATCH v2 4/5] sched/cpufreq: Introduce sugov_cpu_ramp_boost Douglas RAILLARD
2019-06-28 15:08 ` Patrick Bellasi
2019-06-27 17:16 ` [RFC PATCH v2 5/5] sched/cpufreq: Boost schedutil frequency ramp up Douglas RAILLARD
2019-07-02 15:44 ` [RFC PATCH v2 0/5] sched/cpufreq: Make schedutil energy aware Peter Zijlstra
2019-07-03 13:38 ` Douglas Raillard
2019-07-08 11:13 ` Patrick Bellasi
2019-07-08 13:49 ` Douglas Raillard
2019-07-02 15:51 ` Peter Zijlstra
2019-07-03 16:36 ` Douglas Raillard
2019-07-08 11:09 ` Patrick Bellasi
2019-07-08 13:46 ` Douglas Raillard
2019-07-09 10:37 ` Patrick Bellasi
2019-08-09 17:37 ` Douglas Raillard
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