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Message-ID: <ba8c7408-2b8a-45e6-b5d0-87a815f37dde@linux.ibm.com>
Date: Sat, 4 May 2024 17:47:57 +0530
From: Madadi Vineeth Reddy <vineethr@...ux.ibm.com>
To: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
Mel Gorman <mgorman@...e.de>,
Daniel Bristot de Oliveira
<bristot@...hat.com>,
Valentin Schneider <vschneid@...hat.com>, linux-kernel@...r.kernel.org,
Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Madadi Vineeth Reddy <vineethr@...ux.ibm.com>
Subject: Re: [PATCH] sched/fair: Add stats update for cfs_rq->exec_clock in
update_curr() again
Hi Dietmar Eggemann,
On 03/05/24 16:16, Dietmar Eggemann wrote:
> Commit 5d69eca542ee ("sched: Unify runtime accounting across classes")
> removed it and since then:
>
> echo 1 > /proc/sys/kernel/sched_schedstats
> cat /sys/kernel/debug/sched/debug | grep exec_clock
>
> returns:
>
> .exec_clock : 0.000000
>
> for all cfs_rq's.
>
> Put the schedstat_add() back to be able to watch the cfs_rq runtime
> statistic.
>
> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
> ---
> kernel/sched/fair.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 9eb63573110c..37bb3cee6fec 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -1158,6 +1158,7 @@ static void update_curr(struct cfs_rq *cfs_rq)
> delta_exec = update_curr_se(rq_of(cfs_rq), curr);
> if (unlikely(delta_exec <= 0))
> return;
> + schedstat_add(cfs_rq->exec_clock, delta_exec);
>
> curr->vruntime += calc_delta_fair(delta_exec, curr);
> update_deadline(cfs_rq, curr);
Able to see the stats now with the patch.
Tested-by: Madadi Vineeth Reddy <vineethr@...ux.ibm.com>
Thanks and Regards
Madadi Vineeth Reddy
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