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

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Message-ID: <20191002184757.GG4643@worktop.programming.kicks-ass.net>
Date:   Wed, 2 Oct 2019 20:47:57 +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 Wed, Oct 02, 2019 at 02:25:52PM +0200, Giovanni Gherdovich wrote:

> > What about KABYLAKE_X and ICELAKE_X ?
> 
> KABYLAKE_X: does it exist? I couldn't find it in
> arch/x86/include/asm/intel-family.h (the tip tree), I only see KABYLAKE_L and
> KABYLAKE.

My bad, I must've been staring cross-eyed at intel-family.h.

> If the SDM is outdated and ICELAKE_X is also in that category, then the
> turbostat source code is outdated too as it has this function to detect this
> feature:

I think you can trust the turbostat code.