From: Alex Shi <alex.shi@linaro.org>
To: Michael Turquette <mturquette@linaro.org>,
peterz@infradead.org, mingo@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
preeti@linux.vnet.ibm.com, Morten.Rasmussen@arm.com,
riel@redhat.com, efault@gmx.de, nicolas.pitre@linaro.org,
daniel.lezcano@linaro.org, dietmar.eggemann@arm.com,
vincent.guittot@linaro.org, amit.kucheria@linaro.org,
juri.lelli@arm.com, rjw@rjwysocki.net, viresh.kumar@linaro.org,
ashwin.chaugule@linaro.org, abelvesa@gmail.com
Subject: Re: [PATCH RFC v2 4/4] sched: cpufreq_cfs: pelt-based cpu frequency scaling
Date: Wed, 10 Jun 2015 14:23:23 +0800 [thread overview]
Message-ID: <5577D7DB.5020802@linaro.org> (raw)
In-Reply-To: <1431396795-32439-5-git-send-email-mturquette@linaro.org>
On 05/12/2015 10:13 AM, Michael Turquette wrote:
> This governor is event-driven. There is no polling loop to check cpu
> idle time nor any other method which is unsynchronized with the
> scheduler. The entry points for this policy are in fair.c:
> enqueue_task_fair, dequeue_task_fair and task_tick_fair.
>
> This policy is implemented using the cpufreq governor interface for two
> main reasons:
>
> 1) re-using the cpufreq machine drivers without using the governor
> interface is hard.
>
> 2) using the cpufreq interface allows us to switch between the
> scheduler-driven policy and legacy cpufreq governors such as ondemand at
> run-time. This is very useful for comparative testing and tuning.
Hi, Mike,
Did you have some testing data with your patch?
prev parent reply other threads:[~2015-06-10 6:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 2:13 [PATCH RFC v2 0/4] scheduler-driven cpu frequency selection Michael Turquette
2015-05-12 2:13 ` [PATCH RFC v2 1/4] arm: Frequency invariant scheduler load-tracking support Michael Turquette
2015-05-22 23:43 ` Rafael J. Wysocki
2015-05-12 2:13 ` [PATCH RFC v2 2/4] sched: sched feature for cpu frequency selection Michael Turquette
2015-05-12 2:13 ` [PATCH RFC v2 3/4] sched: expose capacity_of in sched.h Michael Turquette
2015-05-12 2:13 ` [PATCH RFC v2 4/4] sched: cpufreq_cfs: pelt-based cpu frequency scaling Michael Turquette
2015-05-13 9:19 ` Paul Bolle
2015-05-18 16:42 ` Juri Lelli
2015-06-29 16:51 ` Michael Turquette
2015-05-23 0:10 ` Rafael J. Wysocki
2015-06-10 6:23 ` Alex Shi [this message]
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