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

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Message-ID: <20200824104905.vui6bdcpsmxluj4m@vireshk-i7>
Date:   Mon, 24 Aug 2020 16:19:06 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     Ionela Voinescu <ionela.voinescu@....com>,
        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

On 24-07-20, 11:38, Vincent Guittot wrote:
> Yeah it's exactly the same behavior as x86 and re using the same
> mechanism seems the  best solution
> 
> The main problem is that AMU currently assumes that it will be the
> only to support such tick based mechanism whereas others like cppc can
> provides similar information

Ionela do you have some feedback to Vincent's email?

We can't handle this apart from the tick handler, i.e. capture this
data at every tick like it is done for x86 or AMU.

-- 
viresh