linux-kernel - Re: [PATCH v3 2/2] drivers: devfreq: add tracing for scheduling work

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Message-ID: <2bc86822-9861-66d5-0a7e-d3d45494772c@samsung.com>
Date:   Tue, 19 Feb 2019 09:28:20 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Lukasz Luba <l.luba@...tner.samsung.com>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Cc:     b.zolnierkie@...sung.com, myungjoo.ham@...sung.com,
        kyungmin.park@...sung.com, m.szyprowski@...sung.com,
        s.nawrocki@...sung.com, mka@...omium.org, rostedt@...dmis.org,
        mingo@...hat.com
Subject: Re: [PATCH v3 2/2] drivers: devfreq: add tracing for scheduling
 work

Hi Lukasz,

On 19. 2. 19. 오전 3:21, Lukasz Luba wrote:
> This patch add basic tracing of the devfreq workqueue and delayed work.
> It aims to capture changes of the polling intervals and device state.
> 
> Signed-off-by: Lukasz Luba <l.luba@...tner.samsung.com>
> ---
>  drivers/devfreq/devfreq.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 0ae3de7..660365a 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -29,6 +29,9 @@
>  #include <linux/of.h>
>  #include "governor.h"
>  
> +#define CREATE_TRACE_POINTS
> +#include <trace/events/devfreq.h>
> +
>  static struct class *devfreq_class;
>  
>  /*
> @@ -394,6 +397,8 @@ static void devfreq_monitor(struct work_struct *work)
>  	queue_delayed_work(devfreq_wq, &devfreq->work,
>  				msecs_to_jiffies(devfreq->profile->polling_ms));
>  	mutex_unlock(&devfreq->lock);
> +
> +	trace_devfreq_monitor(devfreq);
>  }
>  
>  /**
> 

Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics