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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7E7BC32792 for ; Thu, 3 Oct 2019 17:12:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A570B20673 for ; Thu, 3 Oct 2019 17:12:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570122727; bh=kjUYmaBo4PVq9u9yyQ+YpRHxns2z/f+WYQMw69UXDSc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TaaUYtE/+xODGLVoXwOjaGq3nUB1Hbp6gNWHt/D/Dc2e/sdsDz5JN2oI2wporT7CV mbZpb3P+czOSULPyre1kkbEkkxsV6gVtNYeujrcoNnN74kozl0fXKeP78FgwfrNg4R VVWhdJPBE80uDdvc31efTfxNHxQiJ8nN5Rb2w1zE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404398AbfJCRMG (ORCPT ); Thu, 3 Oct 2019 13:12:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:37432 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391811AbfJCQaz (ORCPT ); Thu, 3 Oct 2019 12:30:55 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 342C82054F; Thu, 3 Oct 2019 16:30:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570120254; bh=kjUYmaBo4PVq9u9yyQ+YpRHxns2z/f+WYQMw69UXDSc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wrl4q/KxobXgpiGq4E6WNgEWTgWdhnaIN54XkDA2cVfFqTRNxHdxGAUMAW/NsLMBm QisFkNaKvn4ZnJQEZ5kkObjAirfcAiul8d69NGKLkQGbY/oEAqXFNkSkrlP1YD8zmD FAUQ1p1+XXf8i2LH+u/jQD/TnEFMzahcAo8ZSImw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Douglas RAILLARD , "Peter Zijlstra (Intel)" , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 5.2 153/313] sched/cpufreq: Align trace event behavior of fast switching Date: Thu, 3 Oct 2019 17:52:11 +0200 Message-Id: <20191003154547.990264509@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154533.590915454@linuxfoundation.org> References: <20191003154533.590915454@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Douglas RAILLARD [ Upstream commit 77c84dd1881d0f0176cb678d770bfbda26c54390 ] Fast switching path only emits an event for the CPU of interest, whereas the regular path emits an event for all the CPUs that had their frequency changed, i.e. all the CPUs sharing the same policy. With the current behavior, looking at cpu_frequency event for a given CPU that is using the fast switching path will not give the correct frequency signal. Signed-off-by: Douglas RAILLARD Acked-by: Peter Zijlstra (Intel) Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- kernel/sched/cpufreq_schedutil.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index ae3ec77bb92f6..e139b54716b4a 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -117,6 +117,7 @@ static void sugov_fast_switch(struct sugov_policy *sg_policy, u64 time, unsigned int next_freq) { struct cpufreq_policy *policy = sg_policy->policy; + int cpu; if (!sugov_update_next_freq(sg_policy, time, next_freq)) return; @@ -126,7 +127,11 @@ static void sugov_fast_switch(struct sugov_policy *sg_policy, u64 time, return; policy->cur = next_freq; - trace_cpu_frequency(next_freq, smp_processor_id()); + + if (trace_cpu_frequency_enabled()) { + for_each_cpu(cpu, policy->cpus) + trace_cpu_frequency(next_freq, cpu); + } } static void sugov_deferred_update(struct sugov_policy *sg_policy, u64 time, -- 2.20.1