linux-kernel - Re: cpufreq: intel_pstate: map utilization into the pstate range

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Date:   Mon, 3 Jan 2022 19:23:37 +0100 (CET)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
cc:     Francisco Jerez <currojerez@...eup.net>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Len Brown <lenb@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>
Subject: Re: cpufreq: intel_pstate: map utilization into the pstate range

> > > Can you please run the 32 spinning threads workload (ie. on one
> > > package) and with P-state locked to 10 and then to 20 under turbostat
> > > and send me the turbostat output for both runs?
> >
> > Attached.
> >
> > Pstate 10: spin_minmax_10_dahu-9_5.15.0freq_schedutil_11.turbo
> > Pstate 20: spin_minmax_20_dahu-9_5.15.0freq_schedutil_11.turbo
>
> Well, in  both cases there is only 1 CPU running and it is running at
> 1 GHz (ie. P-state 10) all the time as far as I can say.

It looks better now.  I included 1 core (core 0) for pstates 10, 20, and
21, and 32 cores (socket 0) for the same pstates.

julia
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