linux-kernel - Re: [RFC 0/3] cpufreq: cppc: Add support for frequency invariance

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Message-ID: <20201005231627.GB18029@arm.com>
Date:   Tue, 6 Oct 2020 00:16:27 +0100
From:   Ionela Voinescu <ionela.voinescu@....com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Ben Segall <bsegall@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Mel Gorman <mgorman@...e.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Will Deacon <will@...nel.org>,
        Peter Puhov <peter.puhov@...aro.org>,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:THERMAL" <linux-pm@...r.kernel.org>
Subject: Re: [RFC 0/3] cpufreq: cppc: Add support for frequency invariance

Hi Viresh,

On Monday 05 Oct 2020 at 13:28:22 (+0530), Viresh Kumar wrote:
> On 27-08-20, 12:27, Ionela Voinescu wrote:
> > I am in the middle of unifying AMU counter and cpufreq invariance through
> > something like this, so if you like the idea and you don't think I'm
> > stepping too much on your toes with this, I can consider the usecase in
> > my (what should be) generic support. So in the end this might end up
> > being just a matter of adding a new invariance source (CPPC counters).
> 
> Any update on this ?
> 

I have some code for this, but not yet in the final state I wanted to
bring it to. The code has some dependencies/conflicts with the FFH support
and in small part with the new BL_SWITCHER patches so I wanted to get
those through first.

I'm in the middle of some distractions now, so probably it will take a
around two-three more weeks before I submit the code for review.

Sorry for the delay,
Ionela.

> -- 
> viresh