From patchwork Thu Sep 24 12:39:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 11797199 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 D8E6D618 for ; Thu, 24 Sep 2020 12:40:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C511A221EB for ; Thu, 24 Sep 2020 12:40:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727736AbgIXMkD (ORCPT ); Thu, 24 Sep 2020 08:40:03 -0400 Received: from foss.arm.com ([217.140.110.172]:45020 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727570AbgIXMkD (ORCPT ); Thu, 24 Sep 2020 08:40:03 -0400 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 391B2113E; Thu, 24 Sep 2020 05:40:02 -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 701B03F73B; Thu, 24 Sep 2020 05:40:00 -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 Cc: dietmar.eggemann@arm.com, qperret@google.com, valentin.schneider@arm.com, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, ionela.voinescu@arm.com Subject: [PATCH 0/3] condition EAS enablement on FI support Date: Thu, 24 Sep 2020 13:39:34 +0100 Message-Id: <20200924123937.20938-1-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.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 - condition EAS enablement on FI support - 3/3 - arm64: rebuild scheduling and performance domains in the case of late, counter-driven FI initialisation. This series is dependent on the patches at [1] and based on linux-next 20200918. [1] Most recent version at: https://lore.kernel.org/lkml/20200901205549.30096-1-ionela.voinescu@arm.com/ Ionela Voinescu (3): sched/topology,schedutil: wrap sched domains rebuild sched/topology: condition EAS enablement on FIE support arm64: rebuild sched domains on invariance status changes arch/arm64/include/asm/topology.h | 1 + arch/arm64/kernel/topology.c | 10 ++++++++++ include/linux/sched/topology.h | 1 + kernel/sched/cpufreq_schedutil.c | 9 +-------- kernel/sched/topology.c | 26 +++++++++++++++++++------- 5 files changed, 32 insertions(+), 15 deletions(-) base-commit: b652d2a5f2a4e93d803cc33eb57fdc41ee528500 prerequisite-patch-id: 592324cdfe0735a845d827d23f4d042b66e480ae prerequisite-patch-id: b232a586616b573b7fc320df2dcf4783f26dc169 prerequisite-patch-id: 8a8238e55f4e522eb0ee44c1d4a083cac019959a prerequisite-patch-id: 8edd7fc97f15c7f737339d3e07dbcd6c6d99d986 prerequisite-patch-id: b24b28cd2ec4c929b770f5dd3eeb30f839f8d6ab