From patchwork Tue Sep 29 20:54:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 11806937 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A247618 for ; Tue, 29 Sep 2020 20:56:56 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BB3A820774 for ; Tue, 29 Sep 2020 20:56:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="vND5R51S" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB3A820774 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Owner; bh=+ci7zsHXOgXSeTqYAn6YLVUzbNUS3QP1J0HEkWHbp/g=; b=vND5R51S8sAafriH9mSDnzDQiS xu4kR6oia1X4k1wifmqxUPPFyx4PObwIFiPqTe0ie9Fxm8ZQRBQ2otPrm0Ibf+JjjIG2DISxPkiIG lGrROKxL2md51JQoac44e/TlwWw52i1duWW09IDFIMSeg1tnAYfJHAnigLoZv5twADnPWgv/IMW2I V/rapcMQwb+d6zgvlplDjrcTbRERnxDgM5qc5ipFK+K/6yEnNusfYaiPf4Zg1GvBhVLw7kYdvrd9k DXzTbU7/skP1h+ouf8NESstQDQqPtgzf70XPe7lyrlcYZKbhVJOWBmz/X5GDXC7Xnp5h69dnK/Pn1 Dz9NnKHQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNMee-0006Wj-Pg; Tue, 29 Sep 2020 20:55:20 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNMec-0006Vi-Ea for linux-arm-kernel@lists.infradead.org; Tue, 29 Sep 2020 20:55:19 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B510631B; Tue, 29 Sep 2020 13:55:14 -0700 (PDT) Received: from e108754-lin.cambridge.arm.com (unknown [10.1.199.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EB18A3F73B; Tue, 29 Sep 2020 13:55:12 -0700 (PDT) From: Ionela Voinescu To: mingo@redhat.com, peterz@infradead.org, vincent.guittot@linaro.org, catalin.marinas@arm.com, will@kernel.org, rjw@rjwysocki.net, viresh.kumar@linaro.org Subject: [PATCH v2 0/3] condition EAS enablement on FI support Date: Tue, 29 Sep 2020 21:54:39 +0100 Message-Id: <20200929205442.24792-1-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200929_165518_542855_4EEA0B3D X-CRM114-Status: GOOD ( 12.15 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-pm@vger.kernel.org, qperret@google.com, linux-kernel@vger.kernel.org, dietmar.eggemann@arm.com, ionela.voinescu@arm.com, valentin.schneider@arm.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Given the maturity gained by cpufreq-based Frequency Invariance (FI) support following the patches at [1], this series conditions Energy Aware Scheduling (EAS) enablement on a frequency invariant system. Currently, EAS can be enabled on a system without FI support, leading to incorrect (energy-wise) task placements. As no warning is emitted, it could take some debugging effort to track the behavior back to the lack of FI support; this series changes that by disabling EAS (and advertising it) when FI support is missing. The series is structured as follows: - 1/3 - create function that can rebuild the scheduling and EAS' performance domains if EAS' initial conditions change - 2/3 - arm64: rebuild scheduling and performance domains in the case of late, counter-driven FI initialisation. - 3/3 - condition EAS enablement on FI support This series is based on linux-next 20200928. This series depends on patches at [1] which are now in the linux-next/20200928 base. v1 -> v2: - v1 can be found at [2] - 1/2 - moved now "static inline" rebuild_sched_domains_energy() stub in sched/topology.h header, as suggested by Quentin. - Changed the order of 2/3 and 3/3 to maintain bisection as suggested by Quentin. - 3/3 - place the warning under sched_debug() as per Quentin and Dietmar's recommendations. [1] Most recent version at: https://lore.kernel.org/lkml/20200901205549.30096-1-ionela.voinescu@arm.com/ [2] https://lore.kernel.org/lkml/20200924123937.20938-1-ionela.voinescu@arm.com/ Many thanks, Ionela. Ionela Voinescu (3): sched/topology,schedutil: wrap sched domains rebuild arm64: rebuild sched domains on invariance status changes sched/topology: condition EAS enablement on FIE support arch/arm64/kernel/topology.c | 10 ++++++++++ include/linux/sched/topology.h | 8 ++++++++ kernel/sched/cpufreq_schedutil.c | 9 +-------- kernel/sched/topology.c | 27 ++++++++++++++++++++------- 4 files changed, 39 insertions(+), 15 deletions(-) base-commit: 663b07a45f972c23ac315fd690874bc00977fe99