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From: "Rafael J. Wysocki" <rafael@kernel.org>
Date: Mon, 26 Sep 2016 23:46:34 +0200
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Subject: Re: Regression in 4.8 - CPU speed set very low
To: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Larry Finger <Larry.Finger@lwfinger.net>,
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        Linux PM list <linux-pm@vger.kernel.org>
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On Mon, Sep 26, 2016 at 11:41 PM, Srinivas Pandruvada
<srinivas.pandruvada@linux.intel.com> wrote:
> On Mon, 2016-09-26 at 23:30 +0200, Rafael J. Wysocki wrote:
>> On Mon, Sep 26, 2016 at 11:26 PM, Srinivas Pandruvada
>> <srinivas.pandruvada@linux.intel.com> wrote:
>> >
>> > On Mon, 2016-09-26 at 23:06 +0200, Rafael J. Wysocki wrote:
>> > >
>> > > On Monday, September 26, 2016 11:15:45 AM Larry Finger wrote:
>> >
>> > [...]
>> >
>> > >
>> > > >
>> > > > I have been reluctant to post my entire .config on the list. It
>> > > > is
>> > > > available at
>> > > > http://pastebin.com/aMZaAKwL.
>> > >
>> > > If the governor is ondemand, the driver is acpi-cpufreq, most
>> > > likely.
>> > >
>> > > How do you measure the frequency?
>> > >
>> > Also
>> > When you get into this situation, please dump:
>> > # cat /sys/devices/system/cpu/cpufreq/policy?/scaling_max_freq
>> > # cat /sys/devices/system/cpu/intel_pstate/*
>>
>> The driver is not intel_pstate.
> I guessed from
> CONFIG_X86_INTEL_PSTATE=y
> and
> Frequency is not 400 but something like 396.130

Ah.  Good catch!