linux-kernel - Re: [PATCH] cpuidle: sysfs: Export target residency information

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Date:	Tue, 08 Apr 2014 11:13:16 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	rjw@...ysocki.net, lenb@...nel.org
CC:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH] cpuidle: sysfs: Export target residency information

On 03/17/2014 12:17 PM, Daniel Lezcano wrote:
>  From userspace, there is no way to know the target residency for each idle
> state. If we want to write tools to measure the accuracy of the idle state
> selection from the governor, we need this info.
>
> As the exit latency is exported through sysfs, exporting the target residency
> in the same place makes sense.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---

Hi Rafael,

are you willing to take this patch ?

Thanks
   -- Daniel

>   drivers/cpuidle/sysfs.c |    3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
> index e918b6d..efe2f17 100644
> --- a/drivers/cpuidle/sysfs.c
> +++ b/drivers/cpuidle/sysfs.c
> @@ -293,6 +293,7 @@ static ssize_t show_state_##_name(struct cpuidle_state *state, \
>   }
>
>   define_show_state_function(exit_latency)
> +define_show_state_function(target_residency)
>   define_show_state_function(power_usage)
>   define_show_state_ull_function(usage)
>   define_show_state_ull_function(time)
> @@ -304,6 +305,7 @@ define_store_state_ull_function(disable)
>   define_one_state_ro(name, show_state_name);
>   define_one_state_ro(desc, show_state_desc);
>   define_one_state_ro(latency, show_state_exit_latency);
> +define_one_state_ro(residency, show_state_target_residency);
>   define_one_state_ro(power, show_state_power_usage);
>   define_one_state_ro(usage, show_state_usage);
>   define_one_state_ro(time, show_state_time);
> @@ -313,6 +315,7 @@ static struct attribute *cpuidle_state_default_attrs[] = {
>   	&attr_name.attr,
>   	&attr_desc.attr,
>   	&attr_latency.attr,
> +	&attr_residency.attr,
>   	&attr_power.attr,
>   	&attr_usage.attr,
>   	&attr_time.attr,
>


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