From patchwork Tue May 9 12:22:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 9088 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp2843975vqo; Tue, 9 May 2023 05:33:08 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ73/FxvV2DZh9/UvuGJbonLCTABq0ovfSIzjvyjElHxocpDxEzNRMKl6jXTCJi0OJ3odILT X-Received: by 2002:a17:903:1248:b0:1ab:224b:d1fc with SMTP id u8-20020a170903124800b001ab224bd1fcmr17532803plh.41.1683635587930; Tue, 09 May 2023 05:33:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1683635587; cv=none; d=google.com; s=arc-20160816; b=OFBVgrgyesfeGWTgN0haASpUYlOsVoM31VSMHv2DOzJ7wV86yUKT+n5q8cIVIqNtRf 0wwwr71yMR4Zoav9HVxSepxp2gdJK8zY3iq2JpGrmDjkpgl4Qv6OoKq0+XEceh5fo4LK bxVgwGq77qCaPLLAsnW8hGo2k/5/pULvdDnHjujeKcHuO2b1E6Ep8+Zb30xJHktYY1VX vw9NY+HAqdumeOfgY01zUYLC79OMAkcbsSZdBrWaHs3d0bae10bPFEZ7pNWH+F5GOaxU tUZeNISXgxu1Kb3BT9rYOm8YFilnNv7fjW/vSq//hkhyomO3IkdwHScLk7l/d4wlQX8V yYJA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from; bh=WYVBH3JMYlHfy4uPn8RMRMTWan0osvmyqtJJipKTae8=; b=BHb9pqV/bTu3chO3uCEoJYsbDGMZvLgj5K1ALPmP4dY8NljaiuOz8nFZRf7tLPsdJ4 6+xIxRX6n/BsJ4c2Rp7FBXaG8Z3Yuj+XZX3uzEypfirj3krgeapaRs9dj7k3mfr/Mafs wehA6XYXls+CNtaWqU8MJu61gwfGuE+jPFJq15fjaKBLM0OUXOlGmoDqgHvNzn16UyB/ y3c9DoS2+Wh3v2yc3GoM51Tq0Q71+uzlrQEoc9v0VaqAhfgoLl1gyAm9chzOWvaK83FY XJa48s/vabyPaCm3J6yktWtHYNLH7VORWpc82AmrWx0lL0eoSKig9F89MXdcV/jmHsd/ pEfg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id bi11-20020a170902bf0b00b001a6ef92d441si1294826plb.599.2023.05.09.05.32.41; Tue, 09 May 2023 05:33:07 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235581AbjEIMW6 (ORCPT + 99 others); Tue, 9 May 2023 08:22:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234246AbjEIMW4 (ORCPT ); Tue, 9 May 2023 08:22:56 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A8B1F40DB; Tue, 9 May 2023 05:22:55 -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 D9919FEC; Tue, 9 May 2023 05:23:39 -0700 (PDT) Received: from e123648.arm.com (unknown [10.57.22.29]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 948BE3F67D; Tue, 9 May 2023 05:22:52 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: rostedt@goodmis.org, mhiramat@kernel.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, delyank@fb.com, lukasz.luba@arm.com, qyousef@google.com, qyousef@layalina.io Subject: [PATCH v2 0/3] Add basic tracing for uclamp and schedutil Date: Tue, 9 May 2023 13:22:43 +0100 Message-Id: <20230509122246.1702397-1-lukasz.luba@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1765419870276017569?= X-GMAIL-MSGID: =?utf-8?q?1765419870276017569?= Hi all, The task scheduler feature: Uclamp, begins to take off. To better understand the dynamics in the task scheduler and CPU frequency requests we need some better tracing. In schedutil (cpufreq governor) we allow to enter the scheduler and make the frequency change. Although, there is some limit in regards to how often this can happen. That min period is provided by the cpufreq driver. Thus, some of the cpufreq requests might be filter out and the frequency won't be changed (hopefuly will be set a bit later). We would like to know about those situations, especially in context of the user-space hints made via Uclamp for particular tasks. This patch set aims to add base for our toolkits and post-processing trace analyzes. Changelog: v2: - solved the issue from CI build warning, dropped schedutil.h and re-used the sched.h which is available in build_utility.c where cpufreq_schedutil.c is included - added tag for the last patch 3/3 for the CI robot helping hend - re-based on top of v6.4-rc1 v1: - implementation can be found here [1] Regards, Lukasz Luba [1] https://lore.kernel.org/lkml/20230322151843.14390-1-lukasz.luba@arm.com/ Lukasz Luba (3): sched/tp: Add new tracepoint to track uclamp set from user-space cpufreq: schedutil: Refactor sugov_update_shared() internals schedutil: trace: Add tracing to capture filter out requests include/trace/events/sched.h | 8 ++++++++ kernel/sched/core.c | 5 +++++ kernel/sched/cpufreq_schedutil.c | 28 ++++++++++++++++++---------- 3 files changed, 31 insertions(+), 10 deletions(-)