From nobody Sun Nov 24 01:02:31 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 1773D192D66; Fri, 8 Nov 2024 16:46:31 +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=1731084394; cv=none; b=trnWbRPHwCmjecFCrStK4T7N7SBS/8nTw02DjjLzvsJwdnEA8vGiZDrdXfVkiUPLw1iwnSDtdKtsNOFYiufg2LkFLppU96iZMooqHpSBJgSwRLtd1vWsbj337FrshwkE5lymFqPBJnKgFO87fdWEjEBC7OZmt0jwmyPk5TELaM4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731084394; c=relaxed/simple; bh=cXtVfwFYXyFlu1k+EOgWZE3VZkVVkEP5zIbiuP7gwes=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=i+UXBn/az1/ZlVDjDPLXuktWhghAYCCBpqcXxYzqv4kTDHIp3vE0AgxrO3ia1D7NJAIHbIRhyVP7bQf9+rul4+quj2BQIuhtMvSe1W4mc10WJkISJ2boWDxYav2D7tYbstgltxO3lwMi7RRNIELkPeabiZY4IUjDIzilDb/aqj4= 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=fail (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b=p8U1bJIQ reason="signature verification failed"; 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=fail reason="signature verification failed" (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b="p8U1bJIQ" 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 dbc142109ede4b49; Fri, 8 Nov 2024 17:46:24 +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 61161834811; Fri, 8 Nov 2024 17:46:24 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rjwysocki.net; s=dkim; t=1731084384; bh=cXtVfwFYXyFlu1k+EOgWZE3VZkVVkEP5zIbiuP7gwes=; h=From:Subject:Date; b=p8U1bJIQybDVQeK04Vd1xUPcQDDCOi4Vlb9UURclUy7kZHg2qmAMsnZafTJK6ro3J QSwjvOUlAOwR3AmUmjqROvC2R6v49YNfFYoKLp4+3c4xPGaSj+LIdaDhWd9XNsO7j2 XnnkOnGtvC22TxRvHoC1BxGZSIlSs/DwwxNw8e4w3Hioe83CWwKAqX7mEYFqfC3SMO ZmIwsRdzzNd2YqO5YN61Dk3KCf/ElMmcIsFpDmuYVBcIkHT8q8wsc2rOtgShU0BO/0 cVN7Q+RPv1bn1ZAuUkNnfm5wnqwiERtRtow8T5hKW/+Loa/BReL0lZruXa9orlyT91 enf2Y6yA9iHYg== From: "Rafael J. Wysocki" To: Linux PM Cc: LKML , Lukasz Luba , Peter Zijlstra , Srinivas Pandruvada , Len Brown , Dietmar Eggemann , Morten Rasmussen , Vincent Guittot , Ricardo Neri Subject: [RFC][PATCH v0.1 5/6] sched/topology: Allow .setpolicy() cpufreq drivers to enable EAS Date: Fri, 08 Nov 2024 17:41:22 +0100 Message-ID: <1889415.atdPhlSkOF@rjwysocki.net> In-Reply-To: <3607404.iIbC2pHGDl@rjwysocki.net> References: <3607404.iIbC2pHGDl@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: gggruggvucftvghtrhhoucdtuddrgeefuddrtdeigdeklecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvffeuiedtgfdvtddugeeujedtffetteegfeekffdvfedttddtuefhgeefvdejhfenucfkphepudelhedrudefiedrudelrdelgeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeduleehrddufeeirdduledrleegpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpehrjhifsehrjhifhihsohgtkhhirdhnvghtpdhnsggprhgtphhtthhopedutddprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehluhhkrghsiidrlhhusggrsegrrhhmrdgtohhmpdhrtghpthhtohepphgvthgvrhiisehinhhfrhgruggvrggurdhorhhgpdhrtghpthhtohepshhrihhnihhvrghsrdhprghnughruhhvrggurgeslhhinhhugidrihhnthg X-DCC--Metrics: v370.home.net.pl 0; Body=10 Fuz1=10 Fuz2=10 Content-Type: text/plain; charset="utf-8" From: Rafael J. Wysocki Some cpufreq drivers, like intel_pstate, have built-in governors that are used instead of regular cpufreq governors, schedutil in particular, but they can work with EAS just fine, so allow EAS to be used with those drivers. Also update the debug message printed when the cpufreq governor in use is not schedutil and the related comment, to better match the code after the change. Signed-off-by: Rafael J. Wysocki --- I'm not sure how much value there is in refusing to enable EAS without schedutil in general. For instance, if there are no crossover points between the cost curves for different perf domains, EAS may as well be used with the performance and powersave governors AFAICS. --- kernel/sched/topology.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) Index: linux-pm/kernel/sched/topology.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/topology.c +++ linux-pm/kernel/sched/topology.c @@ -251,7 +251,7 @@ static bool sched_is_eas_possible(const return false; } =20 - /* Do not attempt EAS if schedutil is not being used. */ + /* Do not attempt EAS with a cpufreq governor other than schedutil. */ for_each_cpu(i, cpu_mask) { policy =3D cpufreq_cpu_get(i); if (!policy) { @@ -263,9 +263,9 @@ static bool sched_is_eas_possible(const } gov =3D policy->governor; cpufreq_cpu_put(policy); - if (gov !=3D &schedutil_gov) { + if (gov && gov !=3D &schedutil_gov) { if (sched_debug()) { - pr_info("rd %*pbl: Checking EAS, schedutil is mandatory\n", + pr_info("rd %*pbl: Checking EAS, cpufreq governor is not schedutil\n", cpumask_pr_args(cpu_mask)); } return false;