Re: [PATCH v5 3/4] sched/cpufreq_schedutil: use util_est for OPP selection

From: Peter Zijlstra <peterz@infradead.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	Ingo Molnar <mingo@redhat.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Paul Turner <pjt@google.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Morten Rasmussen <morten.rasmussen@arm.com>,
	Juri Lelli <juri.lelli@redhat.com>, Todd Kjos <tkjos@android.com>,
	Joel Fernandes <joelaf@google.com>,
	Steve Muckle <smuckle@google.com>
Subject: Re: [PATCH v5 3/4] sched/cpufreq_schedutil: use util_est for OPP selection
Date: Wed, 7 Mar 2018 11:12:14 +0100	[thread overview]
Message-ID: <20180307101214.GI25201@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20180222170153.673-4-patrick.bellasi@arm.com>

On Thu, Feb 22, 2018 at 05:01:52PM +0000, Patrick Bellasi wrote:
>  static inline unsigned long cpu_util_cfs(struct rq *rq)
>  {
> +	if (!sched_feat(UTIL_EST))
> +		return READ_ONCE(rq->cfs.avg.util_avg);
> +
> +	return max_t(unsigned long,
> +		     READ_ONCE(rq->cfs.avg.util_avg),
> +		     READ_ONCE(rq->cfs.avg.util_est.enqueued));
>  }

static inline unsigned long cpu_util_cfs(struct rq *rq)
{
	unsigned long util = READ_ONCE(rq->cfs.avg.util_avg);

	if (sched_feat(UTIL_EST)) {
		util = max_t(unsigned long, util,
			     READ_ONCE(rq->cfs.avg.util_est.enqueued));
	}

	return util;
}

Seems like a more readable variant.