linux-kernel - Re: [PATCH v5 03/14] PM: Introduce an Energy Model management framework

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Message-ID: <20180810123032.ixay2e3hlrayifdy@queper01-lin>
Date:   Fri, 10 Aug 2018 13:30:35 +0100
From:   Quentin Perret <quentin.perret@....com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     peterz@...radead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, gregkh@...uxfoundation.org,
        mingo@...hat.com, dietmar.eggemann@....com,
        morten.rasmussen@....com, chris.redpath@....com,
        patrick.bellasi@....com, valentin.schneider@....com,
        vincent.guittot@...aro.org, thara.gopinath@...aro.org,
        viresh.kumar@...aro.org, tkjos@...gle.com, joel@...lfernandes.org,
        smuckle@...gle.com, adharmap@...cinc.com, skannan@...cinc.com,
        pkondeti@...eaurora.org, juri.lelli@...hat.com,
        edubezval@...il.com, srinivas.pandruvada@...ux.intel.com,
        currojerez@...eup.net, javi.merino@...nel.org
Subject: Re: [PATCH v5 03/14] PM: Introduce an Energy Model management
 framework

On Friday 10 Aug 2018 at 13:13:22 (+0200), Rafael J. Wysocki wrote:
> Something able to say how the numbers used by EM and IPA are related. :-)
> 
> Do you think that IPA and EM will always need to use the same set of data for
> the CPU?

Hmm, I would say yes. Both EAS and IPA basically need some sort of
<frequency, power> table, so hopefully the EM framework can provide them
with that :-).

If the EM framework doesn't accommodate the needs of its two users, then
something needs fixing ... Did you have something specific in mind ?

Thanks,
Quentin