linux-kernel - Re: [PATCH v2 2/3] sched/core: Forced idle accounting per-cpu

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Date:   Wed, 12 Jan 2022 13:27:39 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Cruz Zhao <CruzZhao@...ux.alibaba.com>
Cc:     tj@...nel.org, lizefan.x@...edance.com, hannes@...xchg.org,
        mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, joshdon@...gle.com, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] sched/core: Forced idle accounting per-cpu

On Tue, Jan 11, 2022 at 05:56:00PM +0800, Cruz Zhao wrote:

> @@ -1115,6 +1118,7 @@ struct rq {
>  	unsigned int		core_forceidle_seq;
>  	unsigned int		core_forceidle_occupation;
>  	u64			core_forceidle_start;
> +	bool			in_forcedidle;

naming is wrong

>  #endif
>  };
>  
> diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c
> index 07dde29..ea22a8c 100644
> --- a/kernel/sched/stats.c
> +++ b/kernel/sched/stats.c
> @@ -108,6 +108,16 @@ void __update_stats_enqueue_sleeper(struct rq *rq, struct task_struct *p,
>  	}
>  }
>  
> +#ifdef CONFIG_SCHED_CORE
> +static inline u64 get_rq_forceidle_time(struct rq *rq) {
> +	return rq->rq_forceidle_time;
> +}
> +#else
> +static inline u64 get_rq_forceidle_time(struct rq *rq) {
> +	return 0;
> +}
> +#endif

indent is wrong, and if you put the #ifdef inside the function it'll be
smaller.