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Date: Fri, 7 Jul 2017 12:51:04 +0530
From: Viresh Kumar <viresh.kumar@linaro.org>
To: Juri Lelli <juri.lelli@arm.com>
Cc: peterz@infradead.org, mingo@redhat.com, rjw@rjwysocki.net,
        linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
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        dietmar.eggemann@arm.com, patrick.bellasi@arm.com,
        Ingo Molnar <mingo@kernel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [RFC PATCH v1 2/8] sched/deadline: move cpu frequency selection
 triggering points
Message-ID: <20170707072104.GG1523@vireshk-i7>
References: <20170705085905.6558-1-juri.lelli@arm.com>
 <20170705085905.6558-3-juri.lelli@arm.com>
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On 05-07-17, 09:58, Juri Lelli wrote:
> Since SCHED_DEADLINE doesn't track utilization signal (but reserves a
> fraction of CPU bandwidth to tasks admitted to the system), there is no
> point in evaluating frequency changes during each tick event.
> 
> Move frequency selection triggering points to where running_bw changes.
> 
> Co-authored-by: Claudio Scordino <claudio@evidence.eu.com>
> Signed-off-by: Juri Lelli <juri.lelli@arm.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Cc: Luca Abeni <luca.abeni@santannapisa.it>
> ---
> Changes from RFCv0:
> 
>  - modify comment regarding periodic RT updates (Claudio)
> ---
>  kernel/sched/deadline.c |  7 ++++---
>  kernel/sched/sched.h    | 12 ++++++------
>  2 files changed, 10 insertions(+), 9 deletions(-)

Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh