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Date:      Sun, 11 May 2014 17:40:31 -0700
From:      Kevin Oberman <rkoberman@gmail.com>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        Poul-Henning Kamp <phk@phk.freebsd.dk>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>, Ian Smith <smithi@nimnet.asn.au>, "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org>
Subject:   Re: proposal: set default lid state to S3, performance/economy Cx states to Cmax
Message-ID:  <CAN6yY1s%2BLDGQSr5ce%2Bvt-iHxu2Pj%2BripAD9ScnNzFP6N65OB5w@mail.gmail.com>
In-Reply-To: <CAJ-VmomxxYFLCJ6ULjwRhe-Fg03U9RD8tQWt=xknVgrF395UJw@mail.gmail.com>
References:  <CAJ-Vmo=mUtpjgVwNHg8af05vCxVchZdsaekR9_Wf-pOfFjnABQ@mail.gmail.com> <20140505011654.O11699@sola.nimnet.asn.au> <2223.1399233644@critter.freebsd.dk> <CAJ-Vmo=aCtMb-Tavz86GbwENiT5Oe1N8Ju7%2Bpw55XAZCWG3HEw@mail.gmail.com> <20140505153421.W11699@sola.nimnet.asn.au> <85787.1399271121@critter.freebsd.dk> <20140505163316.R11699@sola.nimnet.asn.au> <7681.1399629328@critter.freebsd.dk> <CAJ-VmokWmYOzxhbPyFfrCns=5Ys8NcENwnF5V4unT9QULAL%2Btg@mail.gmail.com> <CAN6yY1sKDcS=_iiy6GmSvKJ3-tw43ugPLwp0Smv3k8=ug7u2PQ@mail.gmail.com> <CAJ-VmomxxYFLCJ6ULjwRhe-Fg03U9RD8tQWt=xknVgrF395UJw@mail.gmail.com>

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On Fri, May 9, 2014 at 1:36 PM, Adrian Chadd <adrian@freebsd.org> wrote:

> cool!
>
> next;
>
> # pkg install intel-pcm
> # kldload cpuctl
> # pcm.x 1
>
> See what it reports.
>

OK. Any documentation on what this is supposed to tell me? Some of it makes
perfect sense and some baffles me.

I see C-states of C1 and C6 when on AC and C1, C3, and C7 when on battery
(and, of course, C0). FREQ vs. AFREQ look interesting, but I'm not sure I
really understand the implications. The last few lines, from " PHYSICAL
CORE IPC", are particularly mysterious to me. I can understand the words,
but I think that they carry more significance than is obvious, at least to
me. I'm not a hardware guy.
 --
R. Kevin Oberman, Network Engineer, Retired
E-mail: rkoberman@gmail.com



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