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

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Message-ID: <e071a66e-e7d5-8657-725b-8d48cb8ddbb7@linux.alibaba.com>
Date:   Fri, 14 Jan 2022 19:06:30 +0800
From:   cruzzhao <cruzzhao@...ux.alibaba.com>
To:     Peter Zijlstra <peterz@...radead.org>
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



在 2022/1/12 下午8:27, Peter Zijlstra 写道:
> 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.

Thanks for reviewing and suggestions, I'll fix these problems in the
next version.

Best,
Cruz Zhao