linux-kernel - Re: [PATCH v6 3/6] sched: add utilization_avg

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Date:	Fri, 3 Oct 2014 16:51:01 +0200
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	LAK <linux-arm-kernel@...ts.infradead.org>,
	Rik van Riel <riel@...hat.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	Mike Galbraith <efault@....de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Paul Turner <pjt@...gle.com>,
	Benjamin Segall <bsegall@...gle.com>
Subject: Re: [PATCH v6 3/6] sched: add utilization_avg_contrib

On 3 October 2014 16:36, Peter Zijlstra <peterz@...radead.org> wrote:
>
>> +      * utilization_load_avg is the sum of the average running time of the
>> +      * sched_entities on the rq.
>>        */
>
> So I think there was some talk about a blocked_utilization thingy, which
> would track the avg running time of the tasks currently asleep, right?
>

yes. Do you mean that we should anticipate and rename
utilization_load_avg into utilization_runnable_avg to make space for a
utilization_blocked_avg that could be added in future ?

>> +     unsigned long runnable_load_avg, blocked_load_avg, utilization_load_avg;
>>       atomic64_t decay_counter;
>>       u64 last_decay;
>>       atomic_long_t removed_load;
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