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

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Message-ID: <4226d5f460604a8130f8079b74ef3fb1d60009d7.camel@linux.intel.com>
Date:   Fri, 13 Sep 2019 15:52:04 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Giovanni Gherdovich <ggherdovich@...e.cz>, tglx@...utronix.de,
        mingo@...hat.com, peterz@...radead.org, bp@...e.de,
        lenb@...nel.org, rjw@...ysocki.net
Cc:     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, 2019-09-09 at 04:42 +0200, Giovanni Gherdovich wrote:

...

> +
> +/*
> + * APERF/MPERF frequency ratio computation.
> + *
> + * The scheduler wants to do frequency invariant accounting and
> needs a <1
> + * ratio to account for the 'current' frequency, corresponding to
> + * freq_curr / freq_max.
I thought this is no longer the restriction and Vincent did some work
to remove this restriction. 


Thanks,
Srinivas