linux-kernel - Re: [PATCH v2] cpufreq: CPPC: Correct desired

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Message-ID: <CAFHUOYyv9jdY8Zrqq-=ZYx_rG7zpHEc4qrnXCb3xP6KwJPG07g@mail.gmail.com>
Date:   Thu, 13 Oct 2016 14:21:18 -0700
From:   Hoan Tran <hotran@....com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "Prakash, Prashanth" <pprakash@...eaurora.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Al Stone <ahs3@...hat.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Loc Ho <lho@....com>, Duc Dang <dhdang@....com>,
        Christopher Covington <cov@...eaurora.org>
Subject: Re: [PATCH v2] cpufreq: CPPC: Correct desired_perf calculation

On Thu, Oct 13, 2016 at 2:12 PM, Rafael J. Wysocki <rafael@...nel.org> wrote:
> On Thu, Oct 13, 2016 at 9:37 PM, Prakash, Prashanth
> <pprakash@...eaurora.org> wrote:
>> On 10/13/2016 11:33 AM, Hoan Tran wrote:
>>> The desired_perf is an abstract performance number. Its value should
>>> be in the range of [lowest perf, highest perf] of CPPC.
>>> The correct calculation is
>>>   desired_perf = freq * cppc_highest_perf / cppc_dmi_max_khz
>>>
>>> And cppc_cpufreq_set_target() returns if desired_perf is exactly
>>> the same with the old perf.
>>>
>>> Signed-off-by: Hoan Tran <hotran@....com>
>> Reviewed-by: Prashanth Prakash <pprakash@...eaurora.org>
>>
>> Hi Rafael,
>> Can you please pick this one for 4.9, as it is bug fix?
>
> Sure, I will queue it up.
>

Thanks, Rafael and Prashanth !

Hoan

> Thanks,
> Rafael