linux-kernel - Re: [PATCH v2 06/22] sched/fair: Collect load-balancing stats for IPC classes

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Date:   Thu, 8 Dec 2022 08:50:23 +0000
From:   Ionela Voinescu <ionela.voinescu@....com>
To:     Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Ricardo Neri <ricardo.neri@...el.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Ben Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Len Brown <len.brown@...el.com>, Mel Gorman <mgorman@...e.de>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Valentin Schneider <vschneid@...hat.com>, x86@...nel.org,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        "Tim C . Chen" <tim.c.chen@...el.com>
Subject: Re: [PATCH v2 06/22] sched/fair: Collect load-balancing stats for
 IPC classes

Hi,

On Monday 28 Nov 2022 at 05:20:44 (-0800), Ricardo Neri wrote:
[..]
>  
> +struct sg_lb_ipcc_stats {
> +	int min_score;	/* Min(score(rq->curr->ipcc)) */
> +	int min_ipcc;	/* Min(rq->curr->ipcc) */

Nit: this is not the minimum IPCC between the current tasks of all
runqueues, but the IPCC specific to the task with the minimum score.

Possibly there's not much to be done about the variable name, but the
comment can be made more clear.

Thanks,
Ionela.

> +	long sum_score; /* Sum(score(rq->curr->ipcc)) */
> +};
[..]