linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Douglas RAILLARD <douglas.raillard@arm.com>
To: linux-kernel@vger.kernel.org, rjw@rjwysocki.net,
	viresh.kumar@linaro.org, peterz@infradead.org,
	juri.lelli@redhat.com, vincent.guittot@linaro.org
Cc: douglas.raillard@arm.com, dietmar.eggemann@arm.com,
	qperret@google.com, linux-pm@vger.kernel.org
Subject: [RFC PATCH v4 2/6] sched/cpufreq: Attach perf domain to sugov policy
Date: Wed, 22 Jan 2020 17:35:34 +0000	[thread overview]
Message-ID: <20200122173538.1142069-3-douglas.raillard@arm.com> (raw)
In-Reply-To: <20200122173538.1142069-1-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 | 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


  parent reply	other threads:[~2020-01-22 17:36 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-22 17:35 [RFC PATCH v4 0/6] sched/cpufreq: Make schedutil energy aware Douglas RAILLARD
2020-01-22 17:35 ` [RFC PATCH v4 1/6] PM: Introduce em_pd_get_higher_freq() Douglas RAILLARD
2020-01-22 17:35 ` Douglas RAILLARD [this message]
2020-01-22 17:35 ` [RFC PATCH v4 3/6] sched/cpufreq: Hook em_pd_get_higher_power() into get_next_freq() Douglas RAILLARD
2020-01-23 16:16   ` Quentin Perret
2020-01-23 17:52     ` Douglas Raillard
2020-01-24 14:37       ` Quentin Perret
2020-01-24 14:58         ` Quentin Perret
2020-02-27 15:51   ` Douglas Raillard
2020-01-22 17:35 ` [RFC PATCH v4 4/6] sched/cpufreq: Introduce sugov_cpu_ramp_boost Douglas RAILLARD
2020-01-23 15:55   ` Rafael J. Wysocki
2020-01-23 17:21     ` Douglas Raillard
2020-01-23 21:02       ` Rafael J. Wysocki
2020-01-28 15:38         ` Douglas Raillard
2020-02-10 13:08   ` Peter Zijlstra
2020-02-13 10:49     ` Douglas Raillard
2020-01-22 17:35 ` [RFC PATCH v4 5/6] sched/cpufreq: Boost schedutil frequency ramp up Douglas RAILLARD
2020-01-22 17:35 ` [RFC PATCH v4 6/6] sched/cpufreq: Add schedutil_em_tp tracepoint Douglas RAILLARD
2020-01-22 18:14 ` [RFC PATCH v4 0/6] sched/cpufreq: Make schedutil energy aware Douglas Raillard
2020-02-10 13:21   ` Peter Zijlstra
2020-02-13 17:49     ` Douglas Raillard
2020-02-14 12:21       ` Peter Zijlstra
2020-02-14 12:52       ` Peter Zijlstra
2020-03-11 12:25         ` Douglas Raillard
2020-02-14 13:37       ` Peter Zijlstra
2020-03-11 12:40         ` Douglas Raillard
2020-01-23 15:43 ` Rafael J. Wysocki
2020-01-23 17:16   ` Douglas Raillard
2020-02-10 13:30     ` Peter Zijlstra
2020-02-13 11:55       ` Douglas Raillard
2020-02-13 13:20         ` Peter Zijlstra
2020-02-27 15:50           ` Douglas Raillard
2020-01-27 17:16 ` Vincent Guittot
2020-02-10 11:37   ` Douglas Raillard

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200122173538.1142069-3-douglas.raillard@arm.com \
    --to=douglas.raillard@arm.com \
    --cc=dietmar.eggemann@arm.com \
    --cc=juri.lelli@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=peterz@infradead.org \
    --cc=qperret@google.com \
    --cc=rjw@rjwysocki.net \
    --cc=vincent.guittot@linaro.org \
    --cc=viresh.kumar@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).