From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C222FC43334 for ; Wed, 29 Jun 2022 19:47:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231334AbiF2Tr4 (ORCPT ); Wed, 29 Jun 2022 15:47:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229952AbiF2Trz (ORCPT ); Wed, 29 Jun 2022 15:47:55 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4CAD33A1AD for ; Wed, 29 Jun 2022 12:47:54 -0700 (PDT) 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 4C7241480; Wed, 29 Jun 2022 12:47:54 -0700 (PDT) Received: from e107158-lin.cambridge.arm.com (e107158-lin.cambridge.arm.com [10.1.197.38]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C830F3F792; Wed, 29 Jun 2022 12:47:52 -0700 (PDT) From: Qais Yousef To: Ingo Molnar , "Peter Zijlstra (Intel)" , Vincent Guittot , Dietmar Eggemann Cc: linux-kernel@vger.kernel.org, Xuewen Yan , Wei Wang , Jonathan JMChen , Hank , Qais Yousef Subject: [PATCH 0/7] Fix relationship between uclamp and fits_capacity() Date: Wed, 29 Jun 2022 20:46:25 +0100 Message-Id: <20220629194632.1117723-1-qais.yousef@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Relationship between uclamp and fits_capacity() is currently broken. Mostly due to how uclamp should interact with migration margin and capacity pressure. But also due not all users were converted to consider uclamp before calling fits_capacity(). Namely cpu_overutilized(). The meat of the series is patch 1 where we introduce a new function, util_fits_cpu(), that takes uclamp into account. The new function should replace all call sits to fits_capacity(), which what subsequent patches do. Except for patch 7 where we fix handling of early exit condition in find_energy_efficient_cpu(AKA feec()) that must be uclamp aware too. util_fits_cpu() will revert back to a simple call to fits_capacity() if uclamp is not being used on the system. Qais Yousef (7): sched/uclamp: Fix relationship between uclamp and migration margin sched/uclamp: Make task_fits_capacity() use util_fits_cpu() sched/uclamp: Fix fits_capacity() check in feec() sched/uclamp: Make select_idle_capacity() use util_fits_cpu() sched/uclamp: Make asym_fits_capacity() use util_fits_cpu() sched/uclamp: Make cpu_overutilized() use util_fits_cpu() sched/uclamp: Cater for uclamp in find_energy_efficient_cpu()'s early exit condition kernel/sched/core.c | 10 +- kernel/sched/fair.c | 256 +++++++++++++++++++++++++++++++++------- kernel/sched/sched.h | 53 ++++++++- kernel/sched/topology.c | 18 +-- 4 files changed, 275 insertions(+), 62 deletions(-) base-commit: 70fb5ccf2ebb09a0c8ebba775041567812d45f86 -- 2.25.1