From: Arto Jantunen <viiru@iki.fi>
To: "Chen, Yu C" <yu.c.chen@intel.com>
Cc: Doug Smythies <dsmythies@telus.net>,
"'Rafael J. Wysocki'" <rjw@rjwysocki.net>,
'Viresh Kumar' <viresh.kumar@linaro.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
'Srinivas Pandruvada' <srinivas.pandruvada@linux.intel.com>
Subject: Re: PROBLEM: Cpufreq constantly keeps frequency at maximum on 4.5-rc4
Date: Sun, 21 Feb 2016 10:45:17 +0200 [thread overview]
Message-ID: <87egc6zc2q.fsf@iki.fi> (raw)
In-Reply-To: <36DF59CE26D8EE47B0655C516E9CE640286C6253@shsmsx102.ccr.corp.intel.com> (Yu C. Chen's message of "Sat, 20 Feb 2016 18:03:34 +0000")
"Chen, Yu C" <yu.c.chen@intel.com> writes:
>> -----Original Message-----
>> From: linux-pm-owner@vger.kernel.org [mailto:linux-pm-
>> owner@vger.kernel.org] On Behalf Of Arto Jantunen
>> Sent: Sunday, February 21, 2016 1:11 AM
>> To: Doug Smythies
>> Cc: 'Rafael J. Wysocki'; 'Viresh Kumar'; linux-pm@vger.kernel.org; 'Srinivas
>> Pandruvada'
>> Subject: Re: PROBLEM: Cpufreq constantly keeps frequency at maximum on
>> 4.5-rc4
>>
>> "Doug Smythies" <dsmythies@telus.net> writes:
>>
>> > On 2106.02.20 00:50 Arto Jantunen wrote:
>> >> I can force the frequency down manually with cpufreq-set, so the
>> >> problem doesn't seem to be with the actual frequency changing.
> cpufreq-set modifies the value of scaling_max_freq, it looks like
> your system always demands for the max freq, can you provide:
> grep . /sys/devices/system/cpu/intel_pstate/*perf_pct
> under powersave and performance?
Powersave:
/sys/devices/system/cpu/intel_pstate/max_perf_pct:100
/sys/devices/system/cpu/intel_pstate/min_perf_pct:22
Performance:
/sys/devices/system/cpu/intel_pstate/max_perf_pct:100
/sys/devices/system/cpu/intel_pstate/min_perf_pct:100
Also, adding intel_pstate=no_hwp to the command line does not change the
result. Changing that to intel_pstate=disable does fix the problem, so
the bug seems to be somewhere in intel_pstate instead of cpufreq core.
--
Arto Jantunen
next prev parent reply other threads:[~2016-02-21 18:13 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-20 8:49 PROBLEM: Cpufreq constantly keeps frequency at maximum on 4.5-rc4 Arto Jantunen
2016-02-20 16:31 ` Doug Smythies
2016-02-20 17:10 ` Arto Jantunen
2016-02-20 18:03 ` Chen, Yu C
2016-02-21 8:45 ` Arto Jantunen [this message]
2016-02-21 8:52 ` Chen, Yu C
2016-02-21 20:02 ` Srinivas Pandruvada
2016-02-21 20:33 ` Arto Jantunen
2016-02-22 6:16 ` Viresh Kumar
2016-02-22 16:39 ` Arto Jantunen
2016-02-22 16:41 ` Viresh Kumar
2016-02-22 16:48 ` Viresh Kumar
2016-02-22 19:25 ` Srinivas Pandruvada
2016-02-28 15:43 ` Arto Jantunen
2016-02-29 6:22 ` Doug Smythies
2016-03-01 19:28 ` Doug Smythies
2016-02-29 16:49 ` Srinivas Pandruvada
2016-03-01 0:37 ` Rafael J. Wysocki
[not found] ` <20160229201946.0bdcc48e@annuminas.surriel.com>
2016-03-01 7:06 ` Arto Jantunen
2016-03-01 16:59 ` Arto Jantunen
2016-03-01 19:22 ` Rik van Riel
2016-03-01 19:47 ` Arto Jantunen
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