linux-kernel - Re: [PATCH v1 1/4] cpufreq: schedutil: Add util to struct sg

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Message-ID: <CAJZ5v0gT1fOOFc_JtidRz4W6osAER+96p8o2X7TS_wUPk2+sVQ@mail.gmail.com>
Date:   Wed, 9 Dec 2020 18:17:51 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Doug Smythies <dsmythies@...us.net>,
        Giovanni Gherdovich <ggherdovich@...e.com>
Subject: Re: [PATCH v1 1/4] cpufreq: schedutil: Add util to struct sg_cpu

On Tue, Dec 8, 2020 at 9:34 AM Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> On 07-12-20, 17:28, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> >
> > Instead of passing util and max between functions while computing the
> > utilization and capacity, store the former in struct sg_cpu (along
> > with the latter and bw_dl).
> >
> > This will allow the current utilization value to be compared with the
> > one obtained previously (which is requisite for some code changes to
> > follow this one), but also it makes the code look slightly more
> > consistent and clean.
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > ---
> >  kernel/sched/cpufreq_schedutil.c |   42 ++++++++++++++++++---------------------
> >  1 file changed, 20 insertions(+), 22 deletions(-)
> >
> > Index: linux-pm/kernel/sched/cpufreq_schedutil.c
> > ===================================================================
> > --- linux-pm.orig/kernel/sched/cpufreq_schedutil.c
> > +++ linux-pm/kernel/sched/cpufreq_schedutil.c
> > @@ -53,6 +53,7 @@ struct sugov_cpu {
> >       unsigned int            iowait_boost;
> >       u64                     last_update;
> >
> > +     unsigned long           util;
> >       unsigned long           bw_dl;
> >       unsigned long           max;
> >
> > @@ -276,16 +277,15 @@ unsigned long schedutil_cpu_util(int cpu
> >       return min(max, util);
> >  }
> >
> > -static unsigned long sugov_get_util(struct sugov_cpu *sg_cpu)
> > +static void sugov_get_util(struct sugov_cpu *sg_cpu)
>
> Maybe name it sugov_update_util() ?

That might be somewhat confusing due to the existing meaning of "update_util".

> Otherwise,
>
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

Thanks!