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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,
	juri.lelli@redhat.com, vincent.guittot@linaro.org,
	douglas.raillard@arm.com, dietmar.eggemann@arm.com,
	qperret@qperret.net, patrick.bellasi@matbug.net,
	dh.han@samsung.com
Subject: [RFC PATCH v3 2/6] sched/cpufreq: Attach perf domain to sugov policy
Date: Fri, 11 Oct 2019 14:44:56 +0100
Message-ID: <20191011134500.235736-3-douglas.raillard@arm.com> (raw)
In-Reply-To: <20191011134500.235736-1-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 ba9e8309eec7..9abda58827c0 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 +70,38 @@ 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;
@@ -859,6 +895,9 @@ static int sugov_start(struct cpufreq_policy *policy)
 							sugov_update_shared :
 							sugov_update_single);
 	}
+
+	sugov_policy_attach_pd(sg_policy);
+
 	return 0;
 }
 
-- 
2.23.0


  parent reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-11 13:44 [RFC PATCH v3 0/6] sched/cpufreq: Make schedutil energy aware Douglas RAILLARD
2019-10-11 13:44 ` [RFC PATCH v3 1/6] PM: Introduce em_pd_get_higher_freq() Douglas RAILLARD
2019-10-17  8:57   ` Dietmar Eggemann
2019-10-17  9:58   ` Dietmar Eggemann
2019-10-17 11:09     ` Douglas Raillard
2019-10-11 13:44 ` Douglas RAILLARD [this message]
2019-10-17  8:57   ` [RFC PATCH v3 2/6] sched/cpufreq: Attach perf domain to sugov policy Dietmar Eggemann
2019-10-17 10:22     ` Douglas Raillard
2019-10-11 13:44 ` [RFC PATCH v3 3/6] sched/cpufreq: Hook em_pd_get_higher_power() into get_next_freq() Douglas RAILLARD
2019-10-11 13:44 ` [RFC PATCH v3 4/6] sched/cpufreq: Introduce sugov_cpu_ramp_boost Douglas RAILLARD
2019-10-14 14:33   ` Peter Zijlstra
2019-10-14 15:32     ` Douglas Raillard
2019-10-17  8:57   ` Dietmar Eggemann
2019-10-17 11:19     ` Douglas Raillard
2019-10-11 13:44 ` [RFC PATCH v3 5/6] sched/cpufreq: Boost schedutil frequency ramp up Douglas RAILLARD
2019-10-17  9:21   ` Dietmar Eggemann
2019-10-11 13:45 ` [RFC PATCH v3 6/6] sched/cpufreq: Add schedutil_em_tp tracepoint Douglas RAILLARD
2019-10-14 14:53 ` [RFC PATCH v3 0/6] sched/cpufreq: Make schedutil energy aware Peter Zijlstra
2019-10-14 15:50   ` Douglas Raillard
2019-10-17  9:50     ` Peter Zijlstra
2019-10-17 11:11       ` Quentin Perret
2019-10-17 14:11         ` Peter Zijlstra
2019-10-18  7:44           ` Dietmar Eggemann
2019-10-18  7:59             ` Peter Zijlstra
2019-10-18 17:24               ` Douglas Raillard
2019-10-18  8:11             ` Peter Zijlstra
2019-10-17 14:23       ` Douglas Raillard
2019-10-17 14:53         ` Peter Zijlstra
2019-10-17 19:07         ` Peter Zijlstra
2019-10-18 11:46           ` Douglas Raillard
2019-10-18 12:07             ` Peter Zijlstra
2019-10-18 14:44               ` Douglas Raillard
2019-10-18 15:15                 ` Vincent Guittot
2019-10-18 16:03                   ` Douglas Raillard
2019-10-18 15:20                 ` Vincent Guittot

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