linux-kernel - Re: [PATCH] cpuidle: Add cpu_idle

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Date:   Tue, 26 Jul 2022 10:08:16 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Kajetan Puchalski <kajetan.puchalski@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Ingo Molnar <mingo@...hat.com>, lukasz.luba@....com,
        Dietmar.Eggemann@....com
Subject: Re: [PATCH] cpuidle: Add cpu_idle_miss trace event

On Tue, 26 Jul 2022 11:24:04 +0100
Kajetan Puchalski <kajetan.puchalski@....com> wrote:

> --- a/include/trace/events/power.h
> +++ b/include/trace/events/power.h
> @@ -40,6 +40,28 @@ DEFINE_EVENT(cpu, cpu_idle,
>  	TP_ARGS(state, cpu_id)
>  );
>  
> +TRACE_EVENT(cpu_idle_miss,
> +
> +	TP_PROTO(unsigned int cpu_id, unsigned int state, bool below),
> +
> +	TP_ARGS(cpu_id, state, below),
> +
> +	TP_STRUCT__entry(
> +		__field(u32,		cpu_id)
> +		__field(u32,		state)
> +		__field(bool,		below)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->cpu_id = cpu_id;
> +		__entry->state = state;
> +		__entry->below = below;
> +	),
> +
> +	TP_printk("cpu_id=%lu state=%lu type=%s", (unsigned long)__entry->cpu_id,
> +		(unsigned long)__entry->state, (__entry->below)?"below":"above")
> +);
> +
>  TRACE_EVENT(powernv_throttle,
>  
>   	TP_PROTO(int chip_id, const char *reason, int pmax),

For the tracing POV,

Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>

-- Steve