From: Ingo Molnar <mingo@kernel.org>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
Wanpeng Li <wanpengli@tencent.com>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Rik van Riel <riel@surriel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Yauheni Kaliuta <yauheni.kaliuta@redhat.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Pavel Machek <pavel@ucw.cz>
Subject: Re: [PATCH 5/6] leds: Use all-in-one vtime aware kcpustat accessor
Date: Thu, 21 Nov 2019 07:58:26 +0100 [thread overview]
Message-ID: <20191121065826.GA3552@gmail.com> (raw)
In-Reply-To: <20191121024430.19938-6-frederic@kernel.org>
* Frederic Weisbecker <frederic@kernel.org> wrote:
> We can now safely read user kcpustat fields on nohz_full CPUs.
> Use the appropriate accessor.
>
> Reported-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
> Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
> Cc: Pavel Machek <pavel@ucw.cz>
> Cc: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Rik van Riel <riel@surriel.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Wanpeng Li <wanpengli@tencent.com>
> Cc: Ingo Molnar <mingo@kernel.org>
> ---
> drivers/leds/trigger/ledtrig-activity.c | 14 +++++++++-----
> 1 file changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
> index ddfc5edd07c8..6901e3631c22 100644
> --- a/drivers/leds/trigger/ledtrig-activity.c
> +++ b/drivers/leds/trigger/ledtrig-activity.c
> @@ -57,11 +57,15 @@ static void led_activity_function(struct timer_list *t)
> curr_used = 0;
>
> for_each_possible_cpu(i) {
> - curr_used += kcpustat_cpu(i).cpustat[CPUTIME_USER]
> - + kcpustat_cpu(i).cpustat[CPUTIME_NICE]
> - + kcpustat_field(&kcpustat_cpu(i), CPUTIME_SYSTEM, i)
> - + kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]
> - + kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
> + struct kernel_cpustat kcpustat;
> +
> + kcpustat_fetch_cpu(&kcpustat, i);
> +
> + curr_used += kcpustat.cpustat[CPUTIME_USER]
> + + kcpustat.cpustat[CPUTIME_NICE]
> + + kcpustat.cpustat[CPUTIME_SYSTEM]
> + + kcpustat.cpustat[CPUTIME_SOFTIRQ]
> + + kcpustat.cpustat[CPUTIME_IRQ];
Not the best tested series:
--- a/drivers/leds/trigger/ledtrig-activity.c
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -59,7 +59,7 @@ static void led_activity_function(struct timer_list *t)
for_each_possible_cpu(i) {
struct kernel_cpustat kcpustat;
- kcpustat_fetch_cpu(&kcpustat, i);
+ kcpustat_cpu_fetch(&kcpustat, i);
curr_used += kcpustat.cpustat[CPUTIME_USER]
+ kcpustat.cpustat[CPUTIME_NICE]
:-)
Thanks,
Ingo
next prev parent reply other threads:[~2019-11-21 6:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-21 2:44 [PATCH 0/6] sched/nohz: Make the rest of kcpustat vtime aware v3 Frederic Weisbecker
2019-11-21 2:44 ` [PATCH 1/6] sched/cputime: Support other fields on kcpustat_field() Frederic Weisbecker
2019-11-21 16:48 ` [tip: sched/core] " tip-bot2 for Frederic Weisbecker
2019-11-21 2:44 ` [PATCH 2/6] sched/vtime: Bring up complete kcpustat accessor Frederic Weisbecker
2019-11-21 16:48 ` [tip: sched/core] " tip-bot2 for Frederic Weisbecker
2019-12-28 20:56 ` [PATCH 2/6] " Chris Wilson
2019-12-30 1:08 ` Frederic Weisbecker
2019-12-30 9:04 ` [PATCH] sched/vtime: Prevent unstable evaluation of WARN(vtime->state) Chris Wilson
2019-12-30 17:39 ` Frederic Weisbecker
2019-11-21 2:44 ` [PATCH 3/6] procfs: Use all-in-one vtime aware kcpustat accessor Frederic Weisbecker
2019-11-21 16:48 ` [tip: sched/core] " tip-bot2 for Frederic Weisbecker
2019-12-08 15:57 ` [PATCH 3/6] " Paul Orlyk
2019-12-09 15:50 ` Frederic Weisbecker
2019-11-21 2:44 ` [PATCH 4/6] cpufreq: Use vtime aware kcpustat accessors for user time Frederic Weisbecker
2019-11-21 16:48 ` [tip: sched/core] " tip-bot2 for Frederic Weisbecker
2019-11-21 2:44 ` [PATCH 5/6] leds: Use all-in-one vtime aware kcpustat accessor Frederic Weisbecker
2019-11-21 6:58 ` Ingo Molnar [this message]
2019-11-21 14:14 ` Frederic Weisbecker
2019-11-21 16:49 ` Ingo Molnar
2019-11-21 16:48 ` [tip: sched/core] " tip-bot2 for Frederic Weisbecker
2019-11-21 2:44 ` [PATCH 6/6] rackmeter: Use " Frederic Weisbecker
2019-11-21 16:48 ` [tip: sched/core] " tip-bot2 for Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2019-11-19 23:22 [PATCH 0/6] sched/nohz: Make the rest of kcpustat vtime aware v2 Frederic Weisbecker
2019-11-19 23:22 ` [PATCH 5/6] leds: Use all-in-one vtime aware kcpustat accessor Frederic Weisbecker
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