linux-kernel - Re: [Patch v5 2/6] sched/fair: Add infrastructure to store and update instantaneous thermal pressure

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Date:   Tue, 5 Nov 2019 16:02:00 -0500
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     Ionela Voinescu <ionela.voinescu@....com>
Cc:     mingo@...hat.com, peterz@...radead.org, vincent.guittot@...aro.org,
        rui.zhang@...el.com, edubezval@...il.com, qperret@...gle.com,
        linux-kernel@...r.kernel.org, amit.kachhap@...il.com,
        javi.merino@...nel.org, daniel.lezcano@...aro.org
Subject: Re: [Patch v5 2/6] sched/fair: Add infrastructure to store and update
 instantaneous thermal pressure

On 11/05/2019 03:21 PM, Ionela Voinescu wrote:
> Hi Thara,
> 
> On Tuesday 05 Nov 2019 at 13:49:42 (-0500), Thara Gopinath wrote:
> [...]
>> +static void trigger_thermal_pressure_average(struct rq *rq)
>> +{
>> +#ifdef CONFIG_SMP
>> +	update_thermal_load_avg(rq_clock_task(rq), rq,
>> +				per_cpu(thermal_pressure, cpu_of(rq)));
>> +#endif
>> +}
> 
> Why did you decide to keep trigger_thermal_pressure_average and not
> call update_thermal_load_avg directly?
> 
> For !CONFIG_SMP you already have an update_thermal_load_avg function
> that does nothing, in kernel/sched/pelt.h, so you don't need that
> ifdef. 
Hi,

Yes you are right. But later with the shift option added, I shift
rq_clock_task(rq) by the shift. I thought it is better to contain it in
a function that replicate it in three different places. I can remove the
CONFIG_SMP in the next version
> 
> Thanks,
> Ionela.
> 
>> +
>>  /*
>>   * All the scheduling class methods:
>>   */
>> -- 
>> 2.1.4
>>


-- 
Warm Regards
Thara