linux-kernel - Re: [PATCH] cpufreq: stats: Switch to ktime and msec instead of jiffies and usertime

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Date:   Wed, 11 Nov 2020 10:44:20 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     Rafael Wysocki <rjw@...ysocki.net>,
        Jonathan Corbet <corbet@....net>, linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Thomas Renninger <trenn@...e.com>,
        Shuah Khan <shuah@...nel.org>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: stats: Switch to ktime and msec instead of
 jiffies and usertime

On 10-11-20, 11:36, Lukasz Luba wrote:
> I am not sure if these ktime_get() are not too heavy in the code path
> visited by the scheduler.

Ahh Right. I missed that.

> How about local_clock()?
> It's used in ./drivers/cpuidle/cpuidle.c to do similar accounting.

Will have a look.

-- 
viresh