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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 239EBC432C3 for ; Thu, 21 Nov 2019 02:44:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E725C20878 for ; Thu, 21 Nov 2019 02:44:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574304293; bh=dFaoUL/kjZQEWQ6Iam/kl52aRoyIpykAOKG/LDr/kZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gLTUAQ9Pjglcc0jzxsaJegxMrGCzuHPCEx5J5sxbylNvrRV6nhx7dWOT0P56t2KYT ps6AlPOJObFQ1B5wGdpfhkKxiKuVnO2Z42JDH9aFlF4c2ZgKw+bkxERgWCzbgroOUx xCSHDbiPJHBh2yEWVR5Zil3acvVeaVLTShjQkI1I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726739AbfKUCow (ORCPT ); Wed, 20 Nov 2019 21:44:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:54384 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726747AbfKUCot (ORCPT ); Wed, 20 Nov 2019 21:44:49 -0500 Received: from lenoir.home (lfbn-ncy-1-150-155.w83-194.abo.wanadoo.fr [83.194.232.155]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 93E09208A3; Thu, 21 Nov 2019 02:44:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574304288; bh=dFaoUL/kjZQEWQ6Iam/kl52aRoyIpykAOKG/LDr/kZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oFjAcHXiE4gPg9y6z3F+zaBAHpmR2cqOUAzK6GlyTf2M0/RtNu3KstyT+0fT3zq1A /DpdBnFr0tR+xtECXtRzkEln3oVPGagFYXiarq8xVWKGTGP0rGQCHmhtR0shWkONae x5AbZuvW0KCnzrYU9F3HwVehqltUKF+HB+XYOmSo= From: Frederic Weisbecker To: Peter Zijlstra , Ingo Molnar Cc: LKML , Frederic Weisbecker , Jacek Anaszewski , Wanpeng Li , "Rafael J . Wysocki" , Benjamin Herrenschmidt , Rik van Riel , Thomas Gleixner , Yauheni Kaliuta , Viresh Kumar , Pavel Machek Subject: [PATCH 4/6] cpufreq: Use vtime aware kcpustat accessors for user time Date: Thu, 21 Nov 2019 03:44:28 +0100 Message-Id: <20191121024430.19938-5-frederic@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191121024430.19938-1-frederic@kernel.org> References: <20191121024430.19938-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can now safely read user and guest kcpustat fields on nohz_full CPUs. Use the appropriate accessors. Reported-by: Yauheni Kaliuta Signed-off-by: Frederic Weisbecker Cc: Thomas Gleixner Cc: Rik van Riel Cc: Peter Zijlstra Cc: Wanpeng Li Cc: Ingo Molnar Cc: Viresh Kumar Cc: Rafael J. Wysocki --- drivers/cpufreq/cpufreq.c | 17 ++++++++++------- drivers/cpufreq/cpufreq_governor.c | 6 +++--- 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 527fd068dc12..ee23eaf20f35 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -113,18 +113,21 @@ EXPORT_SYMBOL_GPL(get_governor_parent_kobj); static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall) { - u64 idle_time; + struct kernel_cpustat kcpustat; u64 cur_wall_time; + u64 idle_time; u64 busy_time; cur_wall_time = jiffies64_to_nsecs(get_jiffies_64()); - busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER]; - busy_time += kcpustat_field(&kcpustat_cpu(cpu), CPUTIME_SYSTEM, cpu); - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ]; - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ]; - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL]; - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE]; + kcpustat_cpu_fetch(&kcpustat, cpu); + + busy_time = kcpustat.cpustat[CPUTIME_USER]; + busy_time += kcpustat.cpustat[CPUTIME_SYSTEM]; + busy_time += kcpustat.cpustat[CPUTIME_IRQ]; + busy_time += kcpustat.cpustat[CPUTIME_SOFTIRQ]; + busy_time += kcpustat.cpustat[CPUTIME_STEAL]; + busy_time += kcpustat.cpustat[CPUTIME_NICE]; idle_time = cur_wall_time - busy_time; if (wall) diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 4bb054d0cb43..f99ae45efaea 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -105,7 +105,7 @@ void gov_update_cpu_data(struct dbs_data *dbs_data) j_cdbs->prev_cpu_idle = get_cpu_idle_time(j, &j_cdbs->prev_update_time, dbs_data->io_is_busy); if (dbs_data->ignore_nice_load) - j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; + j_cdbs->prev_cpu_nice = kcpustat_field(&kcpustat_cpu(j), CPUTIME_NICE, j); } } } @@ -149,7 +149,7 @@ unsigned int dbs_update(struct cpufreq_policy *policy) j_cdbs->prev_cpu_idle = cur_idle_time; if (ignore_nice) { - u64 cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; + u64 cur_nice = kcpustat_field(&kcpustat_cpu(j), CPUTIME_NICE, j); idle_time += div_u64(cur_nice - j_cdbs->prev_cpu_nice, NSEC_PER_USEC); j_cdbs->prev_cpu_nice = cur_nice; @@ -530,7 +530,7 @@ int cpufreq_dbs_governor_start(struct cpufreq_policy *policy) j_cdbs->prev_load = 0; if (ignore_nice) - j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; + j_cdbs->prev_cpu_nice = kcpustat_field(&kcpustat_cpu(j), CPUTIME_NICE, j); } gov->start(policy); -- 2.23.0