From patchwork Tue Feb 20 14:59:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Guittot X-Patchwork-Id: 774786 Received: from mail-wm1-f49.google.com (mail-wm1-f49.google.com [209.85.128.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B3B767E91 for ; Tue, 20 Feb 2024 14:59:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708441198; cv=none; b=e9Po++Cihe2fXaeOOEOPju6aQ1V90u5X4sel5aGRn8H4JluNwU8nMLJ8nHfcvOLKsj+JQMOVxpl+3h4zmDRIEiN2mnH2XGxr2pNYCoQPQeYRYul8c2YeQUTW0iRU8tn0bFzI6Ff1o7xonnQnudNOQRf08/tetcnk6JITEY3pRCA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708441198; c=relaxed/simple; bh=2g9LcPnH5YAZ/S+PepurIxIGpLcMskvJDuA7mDjT8Yk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=NGV2dTsq48FpPNqLYVYIUTZRnSjCIlesKyQ25BwYP7CrFfeBWHAc+IVuOI8LYO0EcGITzcGEJZ1CAoZBZZDKixuZGHtgBz2mq612BxJJkxK8oFiuH9WTHSptZW1p47m+ykClsWX/if80gKGxpXQpKYbZ7Kxw7QQuv4Bs2CHbe/M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=CxXPKZVX; arc=none smtp.client-ip=209.85.128.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="CxXPKZVX" Received: by mail-wm1-f49.google.com with SMTP id 5b1f17b1804b1-412698cdd77so10835555e9.1 for ; Tue, 20 Feb 2024 06:59:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1708441195; x=1709045995; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=srxTKj/NUZFuJQko8D1JWG1zd/3QbRcjQ+DRmUNuvH0=; b=CxXPKZVXkB9FCZJKhasVsCrmPXq5NwYbbQy61Dekpegv8A5FcatzPQpJgXhBzG+apF er8JAo1bFra1Nf6hOyZB2sxB7FJjBnWM0Jxs8n66X56R9iotaKlI/Aktu4apXgmz5q+H B2NnaDKGXozrBgWJ3c5B8VGXhfCoOEZsoe3wJUDTVnWDmmFSES8fwfwiN2czZzm1AFsr rDL0LnNwR7pTb3lb1BvqX+O7DTKYVdsHyHkLeH4P94lTfMq8q5EAUvXhF/ZS9X+SFB8E S5MWMi9TEtmukh2IHwa6CEEG53U1diKAedNC6x+aPizob/oRwK8gjIuD5Yc2AXaEVlIv ssfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708441195; x=1709045995; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=srxTKj/NUZFuJQko8D1JWG1zd/3QbRcjQ+DRmUNuvH0=; b=YiBdg6U5l5p8hzn+NwoQLLPlLHE3qMLUnqX9//ti9RBn6M2lsALP0TVGR9QrXP3ckJ uQNS9cLvwHZd5a2eUgdMaTBDOIXO4Z+rYPap0Rj+d5d3FUV0XmYJ0rClmcXf3PkvfgIb BnB+3HG9eccx51VFozO58WkZaE+0TtIsz5MPmX8hCpWPDZRzTdzabgSsJ2pLbS26YjKQ 1fs6k+AD2zD+KAn9B0DSiqJQ+UGGn4Z3IeVQmaGFVfMb19avCw6t5A9olqrXLD5wmkjT 4pNovRZ5tQ3NbUnLxzElrGiWqd9QXu0IC9Y+Dp/D9lf+6b9Mc7GEnnkEmbXmRE0dE8dD L77A== X-Forwarded-Encrypted: i=1; AJvYcCVDVqOebUFk2WO2GyvOPkrXfdRHbVHxPvjbXDmIP3Cp3c+KcOPp82GvUPwOYGIWrGW8tJeEhFU17OWfBmEm+lj0lf1F7S6qW1Q= X-Gm-Message-State: AOJu0YyRpha+BtCYxuoODZtkwJgUxz4Ch0R8tAgTl59qAMM4Lxd/5jc8 yxzDMgBXJ2D2P+S/UZ551HjNFH1Blv3a3x+KyY20AfhGEF+g5cf9kHHFepv68rs= X-Google-Smtp-Source: AGHT+IGoZ12/HJdh5JXOFNK3u7cPShEpcGd/MlU9rkqxFoq73RjSNBz88He/+s6YAv8PPsc7Ti7I7w== X-Received: by 2002:a05:600c:1d1a:b0:411:db41:687c with SMTP id l26-20020a05600c1d1a00b00411db41687cmr15174599wms.13.1708441194664; Tue, 20 Feb 2024 06:59:54 -0800 (PST) Received: from vingu-book.. ([2a01:e0a:f:6020:8deb:bfb9:b028:6d5c]) by smtp.gmail.com with ESMTPSA id v4-20020a5d6784000000b0033d39626c27sm9304405wru.76.2024.02.20.06.59.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Feb 2024 06:59:53 -0800 (PST) From: Vincent Guittot To: linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org, sudeep.holla@arm.com, rafael@kernel.org, viresh.kumar@linaro.org, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, lukasz.luba@arm.com, rui.zhang@intel.com, mhiramat@kernel.org, daniel.lezcano@linaro.org, amit.kachhap@gmail.com, corbet@lwn.net, gregkh@linuxfoundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org Cc: Vincent Guittot Subject: [PATCH v5 0/5] Rework system pressure interface to the scheduler Date: Tue, 20 Feb 2024 15:59:42 +0100 Message-Id: <20240220145947.1107937-1-vincent.guittot@linaro.org> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Following the consolidation and cleanup of CPU capacity in [1], this serie reworks how the scheduler gets the pressures on CPUs. We need to take into account all pressures applied by cpufreq on the compute capacity of a CPU for dozens of ms or more and not only cpufreq cooling device or HW mitigiations. We split the pressure applied on CPU's capacity in 2 parts: - one from cpufreq and freq_qos - one from HW high freq mitigiation. The next step will be to add a dedicated interface for long standing capping of the CPU capacity (i.e. for seconds or more) like the scaling_max_freq of cpufreq sysfs. The latter is already taken into account by this serie but as a temporary pressure which is not always the best choice when we know that it will happen for seconds or more. [1] https://lore.kernel.org/lkml/20231211104855.558096-1-vincent.guittot@linaro.org/ Change since v4: - Add READ_ONCE() in cpufreq_get_pressure() - Add ack and reviewed tags Change since v3: - Fix uninitialized variables in cpufreq_update_pressure() Change since v2: - Rework cpufreq_update_pressure() Change since v1: - Use struct cpufreq_policy as parameter of cpufreq_update_pressure() - Fix typos and comments - Make sched_thermal_decay_shift boot param as deprecated Vincent Guittot (5): cpufreq: Add a cpufreq pressure feedback for the scheduler sched: Take cpufreq feedback into account thermal/cpufreq: Remove arch_update_thermal_pressure() sched: Rename arch_update_thermal_pressure into arch_update_hw_pressure sched/pelt: Remove shift of thermal clock .../admin-guide/kernel-parameters.txt | 1 + arch/arm/include/asm/topology.h | 6 +- arch/arm64/include/asm/topology.h | 6 +- drivers/base/arch_topology.c | 26 ++++---- drivers/cpufreq/cpufreq.c | 36 +++++++++++ drivers/cpufreq/qcom-cpufreq-hw.c | 4 +- drivers/thermal/cpufreq_cooling.c | 3 - include/linux/arch_topology.h | 8 +-- include/linux/cpufreq.h | 10 +++ include/linux/sched/topology.h | 8 +-- .../{thermal_pressure.h => hw_pressure.h} | 14 ++--- include/trace/events/sched.h | 2 +- init/Kconfig | 12 ++-- kernel/sched/core.c | 8 +-- kernel/sched/fair.c | 63 +++++++++---------- kernel/sched/pelt.c | 18 +++--- kernel/sched/pelt.h | 16 ++--- kernel/sched/sched.h | 22 +------ 18 files changed, 144 insertions(+), 119 deletions(-) rename include/trace/events/{thermal_pressure.h => hw_pressure.h} (55%)