linux-kernel - Re: [PATCH] sched: Provide USF for the portable equipment.

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Message-ID: <20200731181538.GB2674@hirez.programming.kicks-ass.net>
Date:   Fri, 31 Jul 2020 20:15:38 +0200
From:   peterz@...radead.org
To:     Dongdong Yang <contribute.kernel@...il.com>
Cc:     gregkh@...uxfoundation.org, rjw@...ysocki.net,
        viresh.kumar@...aro.org, mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-pm@...r.kernel.org, yangdongdong@...omi.com,
        tanggeliang@...omi.com, taojun@...omi.com, huangqiwu@...omi.com,
        rocking@...ux.alibaba.com, fengwei@...omi.com,
        zhangguoquan@...omi.com, gulinghua@...omi.com, duhui@...omi.com
Subject: Re: [PATCH] sched: Provide USF for the portable equipment.

On Thu, Jul 30, 2020 at 09:35:43PM +0800, Dongdong Yang wrote:
> diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
> index 7fbaee2..7bc3429 100644
> --- a/kernel/sched/cpufreq_schedutil.c
> +++ b/kernel/sched/cpufreq_schedutil.c
> @@ -289,12 +289,21 @@ unsigned long schedutil_cpu_util(int cpu, unsigned long util_cfs,
>  	return min(max, util);
>  }
>  
> +#ifdef CONFIG_SCHED_USF
> +void (*adjust_task_pred_demand)(int cpuid, unsigned long *util,
> +	struct rq *rq) = NULL;
> +EXPORT_SYMBOL(adjust_task_pred_demand);
> +#endif
> +
>  static unsigned long sugov_get_util(struct sugov_cpu *sg_cpu)
>  {
>  	struct rq *rq = cpu_rq(sg_cpu->cpu);
>  	unsigned long util = cpu_util_cfs(rq);
>  	unsigned long max = arch_scale_cpu_capacity(sg_cpu->cpu);
> -
> +#ifdef CONFIG_SCHED_USF
> +	if (adjust_task_pred_demand)
> +		adjust_task_pred_demand(sg_cpu->cpu, &util, rq);
> +#endif
>  	sg_cpu->max = max;
>  	sg_cpu->bw_dl = cpu_bw_dl(rq);

NAK