From nobody Thu Dec 26 12:04:01 2024 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B86945BEC; Fri, 29 Nov 2024 16:28:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=79.96.170.134 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732897710; cv=none; b=GzbJOxGbps5bKySt1O2xoGEpsWCZjoUgww8fjEUcqAkJAaMxFGlA/H1XByptJgTMA7dJs7EHsVa5Ec0Vownf1ZIugWaB5thZQylBOmIdpLJ85X+a+FhC0hM3zC89LZ6dMnNetzapCy8iQWI70OaPDIMfjJ93OGFOk0F8gKyEjFw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732897710; c=relaxed/simple; bh=70VAqg/TQpJWDE7ktXbJySBPdaEm0FcPRiLHVS6/0Qg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=a43uMvjFjt+77QgHcBaOdFQD6g8fbejWV20A8fJD8VFwPHiT8zbu4XqTqoZQx6R1BeHN7826yni2JCQg61jMlbDVPynmodUlg0eBglkPrakb0dSrLyoOFmHdU6WUwQR58YPzvk+eWPZNnlVKZmZWcRAbfTJKNx7o5+WRoi9hHjk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net; spf=pass smtp.mailfrom=rjwysocki.net; dkim=pass (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b=n7H/4bF/; arc=none smtp.client-ip=79.96.170.134 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rjwysocki.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b="n7H/4bF/" Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 6.2.1) id 7508729bf5dc54a4; Fri, 29 Nov 2024 17:28:25 +0100 Received: from kreacher.localnet (unknown [195.136.19.94]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by cloudserver094114.home.pl (Postfix) with ESMTPSA id AEE1EA47B8B; Fri, 29 Nov 2024 17:28:24 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rjwysocki.net; s=dkim; t=1732897705; bh=70VAqg/TQpJWDE7ktXbJySBPdaEm0FcPRiLHVS6/0Qg=; h=From:Subject:Date; b=n7H/4bF/KpSAS8A7lDXbh/Z9QenT9BYexxAzDsH4X25avSJLAiTJxIt7NCSiIgTgK gp77dfDRcxrMmve7slXtGSxW/fiJahZyPocChSqhT50bLQTA2070PfQNU/EGwHRDyf 11xJ+jRecbASE6OAaUUF39aUx+w1wLa8ffnHyfvqKQJkiYXEBaKOGblXXUdNDZpyTQ WFTNNZxIh2l5VOvkW2czfHGiUe7Ez57ymIaanhWjiDZpnESB++XvefftJsfmtFG/ho yTReavoW7LGrpp2VQ5W7lFD9kijnzw4g4L3mq9/9d7yMrlUju589wGEiZwh6ffqOpb rqaqZLKj6SDiA== From: "Rafael J. Wysocki" To: Linux PM Cc: LKML , Lukasz Luba , Peter Zijlstra , Srinivas Pandruvada , Dietmar Eggemann , Morten Rasmussen , Vincent Guittot , Ricardo Neri , Pierre Gondois Subject: [RFC][PATCH v021 3/9] PM: EM: Move perf rebuilding function from schedutil to EM Date: Fri, 29 Nov 2024 16:59:06 +0100 Message-ID: <2229205.irdbgypaU6@rjwysocki.net> In-Reply-To: <5861970.DvuYhMxLoT@rjwysocki.net> References: <5861970.DvuYhMxLoT@rjwysocki.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CLIENT-IP: 195.136.19.94 X-CLIENT-HOSTNAME: 195.136.19.94 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeefuddrheefgdekjecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvffeuiedtgfdvtddugeeujedtffetteegfeekffdvfedttddtuefhgeefvdejhfenucfkphepudelhedrudefiedrudelrdelgeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeduleehrddufeeirdduledrleegpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpehrjhifsehrjhifhihsohgtkhhirdhnvghtpdhnsggprhgtphhtthhopedutddprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehluhhkrghsiidrlhhusggrsegrrhhmrdgtohhmpdhrtghpthhtohepphgvthgvrhiisehinhhfrhgruggvrggurdhorhhgpdhrtghpthhtohepshhrihhnihhvrghsrdhprghnughruhhvrggurgeslhhinhhugidrihhnthg X-DCC--Metrics: v370.home.net.pl 1024; Body=10 Fuz1=10 Fuz2=10 Content-Type: text/plain; charset="utf-8" From: Rafael J. Wysocki The sugov_eas_rebuild_sd() function defined in the schedutil cpufreq governor implements generic functionality that may be useful in other places. In particular, going forward it will be used in the intel_pstate driver. For this reason, move it from schedutil to the energy model code and rename it to em_rebuild_perf_domains(). This also helps to get rid of some #ifdeffery in schedutil which is a plus. No intentional functional impact. Signed-off-by: Rafael J. Wysocki --- v0.1 -> v0.2: * Update the comment regarding :register_em() in cpufreq. * Changelog edits. --- drivers/cpufreq/cpufreq.c | 2 +- include/linux/energy_model.h | 2 ++ kernel/power/energy_model.c | 17 +++++++++++++++++ kernel/sched/cpufreq_schedutil.c | 33 ++++++--------------------------- 4 files changed, 26 insertions(+), 28 deletions(-) Index: linux-pm/kernel/power/energy_model.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-pm.orig/kernel/power/energy_model.c +++ linux-pm/kernel/power/energy_model.c @@ -908,3 +908,20 @@ int em_update_performance_limits(struct return 0; } EXPORT_SYMBOL_GPL(em_update_performance_limits); + +static void rebuild_sd_workfn(struct work_struct *work) +{ + rebuild_sched_domains_energy(); +} + +static DECLARE_WORK(rebuild_sd_work, rebuild_sd_workfn); + +void em_rebuild_perf_domains(void) +{ + /* + * When called from the cpufreq_register_driver() path, the + * cpu_hotplug_lock is already held, so use a work item to + * avoid nested locking in rebuild_sched_domains(). + */ + schedule_work(&rebuild_sd_work); +} Index: linux-pm/kernel/sched/cpufreq_schedutil.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-pm.orig/kernel/sched/cpufreq_schedutil.c +++ linux-pm/kernel/sched/cpufreq_schedutil.c @@ -604,31 +604,6 @@ static const struct kobj_type sugov_tuna =20 /********************** cpufreq governor interface *********************/ =20 -#ifdef CONFIG_ENERGY_MODEL -static void rebuild_sd_workfn(struct work_struct *work) -{ - rebuild_sched_domains_energy(); -} - -static DECLARE_WORK(rebuild_sd_work, rebuild_sd_workfn); - -/* - * EAS shouldn't be attempted without sugov, so rebuild the sched_domains - * on governor changes to make sure the scheduler knows about it. - */ -static void sugov_eas_rebuild_sd(void) -{ - /* - * When called from the cpufreq_register_driver() path, the - * cpu_hotplug_lock is already held, so use a work item to - * avoid nested locking in rebuild_sched_domains(). - */ - schedule_work(&rebuild_sd_work); -} -#else -static inline void sugov_eas_rebuild_sd(void) { }; -#endif - struct cpufreq_governor schedutil_gov; =20 static struct sugov_policy *sugov_policy_alloc(struct cpufreq_policy *poli= cy) @@ -784,7 +759,11 @@ static int sugov_init(struct cpufreq_pol goto fail; =20 out: - sugov_eas_rebuild_sd(); + /* + * EAS shouldn't be attempted without sugov, so rebuild the sched_domains + * on governor changes to make sure the scheduler knows about them. + */ + em_rebuild_perf_domains(); mutex_unlock(&global_tunables_lock); return 0; =20 @@ -826,7 +805,7 @@ static void sugov_exit(struct cpufreq_po sugov_policy_free(sg_policy); cpufreq_disable_fast_switch(policy); =20 - sugov_eas_rebuild_sd(); + em_rebuild_perf_domains(); } =20 static int sugov_start(struct cpufreq_policy *policy) Index: linux-pm/include/linux/energy_model.h =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-pm.orig/include/linux/energy_model.h +++ linux-pm/include/linux/energy_model.h @@ -179,6 +179,7 @@ int em_dev_compute_costs(struct device * int em_dev_update_chip_binning(struct device *dev); int em_update_performance_limits(struct em_perf_domain *pd, unsigned long freq_min_khz, unsigned long freq_max_khz); +void em_rebuild_perf_domains(void); =20 /** * em_pd_get_efficient_state() - Get an efficient performance state from t= he EM @@ -404,6 +405,7 @@ int em_update_performance_limits(struct { return -EINVAL; } +static inline void em_rebuild_perf_domains(void) {} #endif =20 #endif Index: linux-pm/drivers/cpufreq/cpufreq.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-pm.orig/drivers/cpufreq/cpufreq.c +++ linux-pm/drivers/cpufreq/cpufreq.c @@ -1538,7 +1538,7 @@ static int cpufreq_online(unsigned int c =20 /* * Register with the energy model before - * sugov_eas_rebuild_sd() is called, which will result + * em_rebuild_perf_domains() is called, which will result * in rebuilding of the sched domains, which should only be done * once the energy model is properly initialized for the policy * first.