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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Juri Lelli <juri.lelli@redhat.com>
Cc: Rafael Wysocki <rjw@rjwysocki.net>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-pm@vger.kernel.org,
	Vincent Guittot <vincent.guittot@linaro.org>,
	dietmar.eggemann@arm.com, morten.rasmussen@arm.com,
	tkjos@android.com, joelaf@google.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] sched: cpufreq: Keep track of cpufreq utilization update flags
Date: Wed, 13 Dec 2017 16:59:22 +0530	[thread overview]
Message-ID: <20171213112922.GG3322@vireshk-i7> (raw)
In-Reply-To: <20171213112639.GD30887@localhost.localdomain>

On 13-12-17, 12:26, Juri Lelli wrote:
> This flag doesn't do much, does it? I mean RT/DL/IOWAIT are used to bump
> up frequency, while you are adding CFS for the sake of simmetry, right?
> And with my patches DL will hopefully soon be in the same situation.
> If my understanding is correct, maybe add a comment?

Symmetry yes, plus it can be useful to know when there is nothing queued on the
CPU, i.e. no flags are set. Then the CPU is probably going into idle and we may
want to do some tricky stuff there later on.

-- 
viresh

  reply	other threads:[~2017-12-13 11:29 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-13  9:53 [PATCH 0/4] sched: cpufreq: Track util update flags Viresh Kumar
2017-12-13  9:53 ` [PATCH 1/4] cpufreq: schedutil: Initialize sg_cpu->flags to 0 Viresh Kumar
2017-12-13 11:13   ` Juri Lelli
2017-12-13 11:22     ` Viresh Kumar
2018-01-10 12:15   ` [tip:sched/core] sched/cpufreq: " tip-bot for Viresh Kumar
2017-12-13  9:53 ` [PATCH 2/4] sched: cpufreq: Keep track of cpufreq utilization update flags Viresh Kumar
2017-12-13 11:26   ` Juri Lelli
2017-12-13 11:29     ` Viresh Kumar [this message]
2017-12-16 16:40   ` Rafael J. Wysocki
2017-12-16 16:47     ` Viresh Kumar
2017-12-17  0:19       ` Rafael J. Wysocki
2017-12-18  4:59         ` Viresh Kumar
2017-12-18 11:35           ` Rafael J. Wysocki
2017-12-18 11:59             ` Viresh Kumar
2017-12-18 12:14               ` Patrick Bellasi
2017-12-19  3:12                 ` Viresh Kumar
2017-12-19  3:18                   ` Joel Fernandes
2017-12-19  3:22                     ` Viresh Kumar
2017-12-19  3:26                       ` Viresh Kumar
2017-12-19  3:30                         ` Joel Fernandes
2017-12-19  3:41                           ` Viresh Kumar
2017-12-19 10:44                             ` Rafael J. Wysocki
2017-12-18 17:34               ` Rafael J. Wysocki
2017-12-19 19:25   ` Peter Zijlstra
2017-12-20  4:04     ` Viresh Kumar
2017-12-20  8:31       ` Peter Zijlstra
2017-12-20  8:48         ` Viresh Kumar
2017-12-20  9:17           ` Peter Zijlstra
2017-12-20 12:55         ` Patrick Bellasi
2017-12-20 13:28           ` Peter Zijlstra
2017-12-20 14:31             ` Patrick Bellasi
2017-12-20 14:52               ` Rafael J. Wysocki
2017-12-20 15:01                 ` Patrick Bellasi
2017-12-20 14:47             ` Rafael J. Wysocki
2017-12-20 14:51               ` Peter Zijlstra
2017-12-20 17:27               ` Juri Lelli
2017-12-20 18:17                 ` Peter Zijlstra
2017-12-13  9:53 ` [PATCH 3/4] cpufreq: schedutil: Don't pass flags to sugov_set_iowait_boost() Viresh Kumar
2017-12-13 11:28   ` Juri Lelli
2018-01-10 12:15   ` [tip:sched/core] sched/cpufreq: " tip-bot for Viresh Kumar
2017-12-13  9:53 ` [PATCH 4/4] cpufreq: schedutil: Don't call sugov_get_util() unnecessarily Viresh Kumar
2017-12-13 11:34   ` Juri Lelli
2017-12-13 12:02     ` Viresh Kumar
2017-12-19  3:26   ` Joel Fernandes

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