linux-kernel - Re: [PATCH v3 5/6] cpufreq/cppc: set the frequency used for computing the capacity

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Date:   Wed, 25 Oct 2023 14:58:24 +0200
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux@...linux.org.uk, catalin.marinas@....com, will@...nel.org,
        paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, sudeep.holla@....com,
        gregkh@...uxfoundation.org, rafael@...nel.org, mingo@...hat.com,
        juri.lelli@...hat.com, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vschneid@...hat.com, viresh.kumar@...aro.org,
        lenb@...nel.org, robert.moore@...el.com, lukasz.luba@....com,
        ionela.voinescu@....com, pierre.gondois@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-acpi@...r.kernel.org, conor.dooley@...rochip.com,
        suagrfillet@...il.com, ajones@...tanamicro.com, lftan@...nel.org
Subject: Re: [PATCH v3 5/6] cpufreq/cppc: set the frequency used for computing
 the capacity

On Wed, 25 Oct 2023 at 14:52, Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Wed, Oct 18, 2023 at 06:25:39PM +0200, Vincent Guittot wrote:
> > Save the frequency associated to the performance that has been used when
> > initializing the capacity of CPUs.
> > Also, cppc cpufreq driver can register an artificial energy model. In such
> > case, it needs the frequency for this compute capacity.
> > We moved and renamed cppc_perf_to_khz and cppc_perf_to_khz to use them
> > outside cppc_cpufreq in topology_init_cpu_capacity_cppc().
> >
> > Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
> > ---
> >  drivers/acpi/cppc_acpi.c       |  93 ++++++++++++++++++++++
> >  drivers/base/arch_topology.c   |  15 +++-
> >  drivers/cpufreq/cppc_cpufreq.c | 141 ++++++---------------------------
> >  include/acpi/cppc_acpi.h       |   2 +
> >  4 files changed, 133 insertions(+), 118 deletions(-)
>
> Perhaps split this patch into code movement and actual change for ease
> of review? As in, I'm having trouble finding the actual changes ;-)

yes, I can split it.

The actual change is located in drivers/base/arch_topology.c

>
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