linux-kernel - Re: [PATCH v2 21/48] PM: domains: Add "performance" column to debug summary

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Date:   Mon, 11 Jan 2021 10:13:18 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Kevin Hilman <khilman@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v2 21/48] PM: domains: Add "performance" column to debug summary

On Thu, 17 Dec 2020 at 19:07, Dmitry Osipenko <digetx@...il.com> wrote:
>
> Add "performance" column to debug summary which shows performance state
> of all power domains and theirs devices.
>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

As I stated for patch 20, I suggest you resend this to the linux-pm
mailing list so it can be picked up by Rafael.

Kind regards
Uffe

> ---
>  drivers/base/power/domain.c | 22 +++++++++++++++++-----
>  1 file changed, 17 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index a3e1bfc233d4..1c60dae8540c 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -2951,7 +2951,15 @@ static void rtpm_status_str(struct seq_file *s, struct device *dev)
>         else
>                 WARN_ON(1);
>
> -       seq_puts(s, p);
> +       seq_printf(s, "%-25s  ", p);
> +}
> +
> +static void perf_status_str(struct seq_file *s, struct device *dev)
> +{
> +       struct generic_pm_domain_data *gpd_data;
> +
> +       gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
> +       seq_put_decimal_ull(s, "", gpd_data->performance_state);
>  }
>
>  static int genpd_summary_one(struct seq_file *s,
> @@ -2979,7 +2987,7 @@ static int genpd_summary_one(struct seq_file *s,
>         else
>                 snprintf(state, sizeof(state), "%s",
>                          status_lookup[genpd->status]);
> -       seq_printf(s, "%-30s  %-15s ", genpd->name, state);
> +       seq_printf(s, "%-30s  %-50s %u", genpd->name, state, genpd->performance_state);
>
>         /*
>          * Modifications on the list require holding locks on both
> @@ -2987,7 +2995,10 @@ static int genpd_summary_one(struct seq_file *s,
>          * Also genpd->name is immutable.
>          */
>         list_for_each_entry(link, &genpd->parent_links, parent_node) {
> -               seq_printf(s, "%s", link->child->name);
> +               if (list_is_first(&link->parent_node, &genpd->parent_links))
> +                       seq_printf(s, "\n%50s ", link->child->name);
> +               else
> +                       seq_printf(s, "%s", link->child->name);
>                 if (!list_is_last(&link->parent_node, &genpd->parent_links))
>                         seq_puts(s, ", ");
>         }
> @@ -3001,6 +3012,7 @@ static int genpd_summary_one(struct seq_file *s,
>
>                 seq_printf(s, "\n    %-50s  ", kobj_path);
>                 rtpm_status_str(s, pm_data->dev);
> +               perf_status_str(s, pm_data->dev);
>                 kfree(kobj_path);
>         }
>
> @@ -3016,9 +3028,9 @@ static int summary_show(struct seq_file *s, void *data)
>         struct generic_pm_domain *genpd;
>         int ret = 0;
>
> -       seq_puts(s, "domain                          status          children\n");
> +       seq_puts(s, "domain                          status          children                           performance\n");
>         seq_puts(s, "    /device                                             runtime status\n");
> -       seq_puts(s, "----------------------------------------------------------------------\n");
> +       seq_puts(s, "----------------------------------------------------------------------------------------------\n");
>
>         ret = mutex_lock_interruptible(&gpd_list_lock);
>         if (ret)
> --
> 2.29.2
>