From: Viresh Kumar <viresh.kumar@linaro.org>
To: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
linux@arm.linux.org.uk,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Juri Lelli <juri.lelli@arm.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Peter Zijlstra <peterz@infradead.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [PATCH v4 02/10] cpufreq: provide default frequency-invariance setter function
Date: Tue, 19 Sep 2017 11:39:17 -0700 [thread overview]
Message-ID: <20170919183917.GC2792@ubuntu> (raw)
In-Reply-To: <20170825143206.30467-3-dietmar.eggemann@arm.com>
On 25-08-17, 15:31, Dietmar Eggemann wrote:
> Frequency-invariant accounting support based on the ratio of current
> frequency and maximum supported frequency is an optional feature an arch
> can implement.
>
> Since there are cpufreq drivers (e.g. cpufreq-dt) which can be build for
> different arch's a default implementation of the frequency-invariance
> setter function arch_set_freq_scale() is needed.
>
> This default implementation is an empty weak function which will be
> overwritten by a strong function in case the arch provides one.
>
> The setter function passes the cpumask of related (to the frequency
> change) cpus (online and offline cpus), the (new) current frequency and
> the maximum supported frequency.
>
> Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
> ---
> drivers/cpufreq/cpufreq.c | 6 ++++++
> include/linux/cpufreq.h | 3 +++
> 2 files changed, 9 insertions(+)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
--
viresh
next prev parent reply other threads:[~2017-09-19 18:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-25 14:31 [PATCH v4 00/10] arm, arm64, cpufreq: frequency- and cpu-invariant accounting support for task scheduler Dietmar Eggemann
2017-08-25 14:31 ` [PATCH v4 01/10] drivers base/arch_topology: free cpumask cpus_to_visit Dietmar Eggemann
2017-08-25 14:31 ` [PATCH v4 02/10] cpufreq: provide default frequency-invariance setter function Dietmar Eggemann
2017-09-07 23:22 ` Rafael J. Wysocki
2017-09-19 18:39 ` Viresh Kumar [this message]
2017-08-25 14:31 ` [PATCH v4 03/10] cpufreq: arm_big_little: invoke " Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 04/10] cpufreq: dt: " Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 05/10] drivers base/arch_topology: provide frequency-invariant accounting support Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 06/10] drivers base/arch_topology: allow inlining cpu-invariant " Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 07/10] arm: wire frequency-invariant accounting support up to the task scheduler Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 08/10] arm: wire cpu-invariant " Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 09/10] arm64: wire frequency-invariant " Dietmar Eggemann
2017-08-25 14:32 ` [PATCH v4 10/10] arm64: wire cpu-invariant " Dietmar Eggemann
2017-08-30 23:34 ` [PATCH v4 00/10] arm, arm64, cpufreq: frequency- and cpu-invariant accounting support for " Rafael J. Wysocki
2017-08-31 11:27 ` Dietmar Eggemann
2017-09-07 12:04 ` Dietmar Eggemann
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