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

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Message-ID: <CAJZ5v0iODf2nUhMuyp6MXpLVdF3etDmyXz9OVRuQJ5B5Z=t2OA@mail.gmail.com>
Date:   Sun, 12 Aug 2018 11:49:40 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Quentin Perret <quentin.perret@....com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...hat.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Chris Redpath <chris.redpath@....com>,
        Patrick Bellasi <patrick.bellasi@....com>,
        Valentin Schneider <valentin.schneider@....com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Thara Gopinath <thara.gopinath@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Todd Kjos <tkjos@...gle.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Steve Muckle <smuckle@...gle.com>, adharmap@...cinc.com,
        skannan@...cinc.com, Pavan Kondeti <pkondeti@...eaurora.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        currojerez@...eup.net, Javi Merino <javi.merino@...nel.org>
Subject: Re: [PATCH v5 03/14] PM: Introduce an Energy Model management framework

On Fri, Aug 10, 2018 at 2:30 PM Quentin Perret <quentin.perret@....com> wrote:
>
> 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 ?

Not really. :-)