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Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load tracking trace event

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load tracking trace event
Date 2017-03-28 10:10 +0200
Message-ID <tpUmt-4GO-17@gated-at.bofh.it> (permalink)
References <tpSXo-3CJ-11@gated-at.bofh.it> <tpSXo-3CJ-25@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Mar 28, 2017 at 07:35:40AM +0100, Dietmar Eggemann wrote:
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 04d4f81b96ae..d1dcb19f5b55 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -2940,6 +2940,8 @@ __update_load_avg(u64 now, int cpu, struct sched_avg *sa,
>  
>  	if (cfs_rq)
>  		trace_sched_load_cfs_rq(cfs_rq);
> +	else
> +		trace_sched_load_se(container_of(sa, struct sched_entity, avg));
>  
>  	return decayed;
>  }
> @@ -3162,6 +3164,7 @@ static inline int propagate_entity_load_avg(struct sched_entity *se)
>  	update_tg_cfs_load(cfs_rq, se);
>  
>  	trace_sched_load_cfs_rq(cfs_rq);
> +	trace_sched_load_se(se);
>  
>  	return 1;
>  }

Having back-to-back tracepoints is disgusting.

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[RFC PATCH 4/5] sched/events: Introduce sched_entity load tracking trace event Dietmar Eggemann <dietmar.eggemann@arm.com> - 2017-03-28 08:40 +0200
  Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Peter Zijlstra <peterz@infradead.org> - 2017-03-28 10:10 +0200
    Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Dietmar Eggemann <dietmar.eggemann@arm.com> - 2017-03-28 16:10 +0200
    Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Dietmar Eggemann <dietmar.eggemann@arm.com> - 2017-03-28 16:20 +0200
  Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Peter Zijlstra <peterz@infradead.org> - 2017-03-28 10:10 +0200
    Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Dietmar Eggemann <dietmar.eggemann@arm.com> - 2017-03-28 16:20 +0200
      Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Peter Zijlstra <peterz@infradead.org> - 2017-03-28 18:50 +0200
        Re: [RFC PATCH 4/5] sched/events: Introduce sched_entity load  tracking trace event Dietmar Eggemann <dietmar.eggemann@arm.com> - 2017-03-29 22:30 +0200

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