linux-kernel - Re: [PATCH 1/2] x86,sched: Add support for frequency invariance

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Message-ID: <20190924160423.GN2369@hirez.programming.kicks-ass.net>
Date:   Tue, 24 Sep 2019 18:04:23 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Giovanni Gherdovich <ggherdovich@...e.cz>
Cc:     srinivas.pandruvada@...ux.intel.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...e.de, lenb@...nel.org, rjw@...ysocki.net,
        x86@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, mgorman@...hsingularity.net,
        matt@...eblueprint.co.uk, viresh.kumar@...aro.org,
        juri.lelli@...hat.com, pjt@...gle.com, vincent.guittot@...aro.org,
        qperret@...rret.net, dietmar.eggemann@....com
Subject: Re: [PATCH 1/2] x86,sched: Add support for frequency invariance

On Mon, Sep 09, 2019 at 04:42:15AM +0200, Giovanni Gherdovich wrote:

> +static void intel_set_cpu_max_freq(void)
> +{
> +	/*
> +	 * TODO: add support for:
> +	 *
> +	 * - Xeon Phi (KNM, KNL)
> +	 * - Xeon Gold/Platinum, Atom Goldmont/Goldmont Plus
> +	 * - Atom Silvermont

ISTR I had code for Atom.. what happened with that?

> +	 *
> +	 * which all now get by default arch_max_freq = SCHED_CAPACITY_SCALE
> +	 */
> +	core_set_cpu_max_freq();
> +}