linux-kernel - Re: [PATCH] intel_idle: Add ICL support

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Message-ID: <CAJZ5v0gT_XKToTtuBdAeDuz6Ggk8-rVxE-hSjdfQC4uCMsTcdA@mail.gmail.com>
Date:   Wed, 26 Aug 2020 15:21:09 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Artem Bityutskiy <dedekind1@...il.com>
Cc:     Guilhem Lettron <guilhem@...pilot.io>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Len Brown <lenb@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] intel_idle: Add ICL support

On Wed, Aug 26, 2020 at 3:18 PM Artem Bityutskiy <dedekind1@...il.com> wrote:
>
> On Wed, 2020-08-26 at 16:16 +0300, Artem Bityutskiy wrote:
> > Just get a reasonably new turbostat (it is part of the kernel tree, you
> > can compile it yourself) and run it for few seconds (like 'turbostat
> > sleep 10'), get the output (will be a lot of it), and we can check what
> > is actually going on with regards to C-states.
>
> Oh, and if you could do that with and without your patch, we could even
> compare things. But try to do it at least with the default (acpi_idle)
> configuration.

IMO it is way easier to get the information from sysfs.