linux-kernel - Re: [PATCH v6 08/11] cpufreq/schedutil: take into account interrupt

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Date:   Tue, 12 Jun 2018 10:54:37 +0200
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Vincent Guittot <vincent.guittot@...aro.org>, peterz@...radead.org,
        mingo@...nel.org, linux-kernel@...r.kernel.org
Cc:     rjw@...ysocki.net, juri.lelli@...hat.com, Morten.Rasmussen@....com,
        viresh.kumar@...aro.org, valentin.schneider@....com,
        patrick.bellasi@....com, joel@...lfernandes.org,
        daniel.lezcano@...aro.org, quentin.perret@....com,
        Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v6 08/11] cpufreq/schedutil: take into account interrupt

On 06/08/2018 02:09 PM, Vincent Guittot wrote:

[...]

> @@ -182,21 +183,30 @@ static void sugov_get_util(struct sugov_cpu *sg_cpu)
>   	sg_cpu->util_dl  = cpu_util_dl(rq);
>   	sg_cpu->bw_dl    = cpu_bw_dl(rq);
>   	sg_cpu->util_rt  = cpu_util_rt(rq);
> +	sg_cpu->util_irq = cpu_util_irq(rq);
>   }
>   
>   static unsigned long sugov_aggregate_util(struct sugov_cpu *sg_cpu)
>   {
>   	struct rq *rq = cpu_rq(sg_cpu->cpu);
> -	unsigned long util;
> +	unsigned long util, max = sg_cpu->max;
>   
>   	if (rq->rt.rt_nr_running)
>   		return sg_cpu->max;
>   
> +	if (unlikely(sg_cpu->util_irq >= max))
> +		return max;
> +
> +	/* Sum rq utilization */
>   	util = sg_cpu->util_cfs;
>   	util += sg_cpu->util_rt;
>   
> -	if ((util + sg_cpu->util_dl) >= sg_cpu->max)
> -		return sg_cpu->max;
> :confirm b9

This didn't let me apply the patch ;-) After removing this line it worked.

[...]