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Groups > linux.kernel > #1368065
| From | Jörg Otte <jrg.otte@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [intel-pstate driver regression] processor frequency very high even if in idle |
| Date | 2016-03-31 11:30 +0200 |
| Message-ID | <riH5o-2PS-19@gated-at.bofh.it> (permalink) |
| References | (6 earlier) <riqHh-7AW-43@gated-at.bofh.it> <ritvs-1a3-9@gated-at.bofh.it> <ritvs-1a3-7@gated-at.bofh.it> <riuKT-2cZ-29@gated-at.bofh.it> <riuUy-2hW-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
2016-03-30 22:26 GMT+02:00 Srinivas Pandruvada
<srinivas.pandruvada@linux.intel.com>:
> On Wed, 2016-03-30 at 22:12 +0200, Rafael J. Wysocki wrote:
>> On Wed, Mar 30, 2016 at 8:58 PM, Srinivas Pandruvada
>> <srinivas.pandruvada@linux.intel.com> wrote:
>> >
>> > On Wed, 2016-03-30 at 11:50 -0700, Doug Smythies wrote:
>> > >
>> > > On 2016.03.30 08:52 Jörg Otte wrote:
>> > > >
>> > > >
>> > > > 2016-03-30 17:33 GMT+02:00 Pandruvada, Srinivas
>> > > > <srinivas.pandruvad
>> > > > a@intel.com>:
>> > > > >
>> > > > >
>> > > > > On Wed, 2016-03-30 at 13:05 +0200, Rafael J. Wysocki wrote:
>> > > > > >
>> > > > > >
>> > > > > > On Wed, Mar 30, 2016 at 12:17 PM, Jörg Otte <jrg.otte@gmail
>> > > > > > .com
>> > > > > > >
>> > > > > > >
>> > > > >
>> > > > >
>> > > > > >
>> > > > > >
>> > > > > > >
>> > > > > > >
>> > > > > > > >
>> > > > > > > >
>> > > > > > > > >
>> > > > > > > > >
>> > > > > > > > > Now in v4.6-rc1 the characteristic has dramatically
>> > > > > > > > > changed.
>> > > > > > > > > If in idle the processor frequency is more or less a
>> > > > > > > > > few
>> > > > > > > > > MHz around 2500Mhz.
>> > > > > > > > > I currently use acpi_cpufreq which works as usual.
>> > > > > > > > > Processor: Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz
>> > > > > > > > > (family: 0x6, model: 0x3c, stepping: 0x3)
>> > > > >
>> > > > >
>> > > > > I want to reproduce this if I can. Can you give us info about
>> > > > > your
>> > > > > setup (Linux distribution, laptop model etc.)?
>> > > I would like to try to reproduce the issue also.
>> > >
>> > > >
>> > > >
>> > > > Distro: Ubuntu 14.04.4 LTS
>> > > Note that with Ubuntu 14.04, I had issues where my CPU
>> > > would lock at pstate 24 (not always 24, but usually),
>> > > regardless of load.
>> > > However, it was always after an S3 suspend, occurred 100%
>> > > of the time, and was independent of intel_pstate or
>> > > acpi-cpufreq CPU frequency scaling drivers.
>> > >
>> > > Since changing my test server to Ubuntu server edition 16.04
>> > > (development version), I have not had those issues. While I have
>> > > no proof, I have assumed the issue elimination was somehow
>> > > related
>> > > to the change to systemd.
>> > >
>> > > It might be worth observing both what the intel_pstate is asking
>> > > for
>> > > and what the processor is actually doing.
>> > If Jörg runs with
>> >
>> > turbostat -i 1 --msr=0x199
>> >
>> > We can tell whether if we requested or the same problem you had.
>> > I tried on Ubuntu LTS 14.04 on same Haswell CPU model, I didn't see
>> > this issue.
>> There seems to be something odd about the Jörg's setup, or we'd have
>> received more reports about this issue.
>>
>> Question is what that is and what really makes the difference.
>>
> I think, somehow we entered performance mode from powersave by default
>
> turbostat -i 1 --msr=0x199 will tell us.
>
jojo@fichte:/sys/devices/system/cpu/cpufreq/policy0$ cat scaling_governor
powersave
turbostat -i 1 --msr=0x199
CPUID(7): No-SGX
CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x199
- 45 1.74 2590 2496 0x00000000
0 45 1.76 2565 2498 0x00000a00
1 72 2.84 2548 2496 0x00000800
2 30 1.11 2661 2496 0x00001a00
3 33 1.23 2661 2495 0x00001a00
CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x199
- 9 0.35 2525 2495 0x00000000
0 1 0.04 2735 2495 0x00000800
1 1 0.05 2501 2495 0x00000800
2 17 0.65 2540 2495 0x00001a00
3 16 0.64 2501 2495 0x00001a00
CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x199
- 11 0.43 2523 2495 0x00000000
0 3 0.11 2631 2495 0x00000c00
1 7 0.27 2524 2495 0x00000800
2 18 0.72 2527 2495 0x00001a00
3 15 0.61 2501 2495 0x00001a00
Thanks, Jörg
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Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-29 19:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-29 23:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-30 12:20 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-30 13:10 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-30 17:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-30 20:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-31 11:10 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-31 13:50 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-31 17:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-31 17:50 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-31 18:20 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-31 19:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-31 20:00 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-01 02:10 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-04-01 11:50 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-04-01 17:10 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-01 22:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-04-01 14:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-04-01 16:10 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-04-01 19:50 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-04-01 20:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-04-01 20:50 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-01 22:00 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-04-02 01:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-02 02:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-01 22:30 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-04-01 17:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-04-01 18:50 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-04-01 19:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-03-30 17:40 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-30 18:00 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-30 21:00 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-30 22:20 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-30 22:30 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-03-31 11:30 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-03-31 16:40 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-03-31 17:20 +0200
Re: [intel-pstate driver regression] processor frequency very high even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-31 17:20 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-04-01 09:30 +0200
RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-03-30 21:00 +0200
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