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Re: v4.8-rc1: thinkpad x60: running at low frequency even during kernel build

From Pavel Machek <pavel@ucw.cz>
Newsgroups linux.kernel
Subject Re: v4.8-rc1: thinkpad x60: running at low frequency even during kernel build
Date 2016-11-04 23:20 +0100
Message-ID <szV06-7FO-9@gated-at.bofh.it> (permalink)
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Hi!

> I'd prefer mails over bugzilla for now...
> 
> 4.9-rc2 has bios_limit:
> 
> pavel@duo:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/bios_limit
> 1833000
> 
> and it has thermal zones:
> 
> /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_temp 127000
> /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_type critical
> /sys/devices/virtual/thermal/thermal_zone1/trip_point_0_temp 97000
> /sys/devices/virtual/thermal/thermal_zone1/trip_point_0_type critical
> /sys/devices/virtual/thermal/thermal_zone1/trip_point_1_temp 92500
> /sys/devices/virtual/thermal/thermal_zone1/trip_point_1_type passive
> 
> ..so it should slow down CPU at 92C.
> 
> So lets push the temperature up a bit...
> 
> sudo watch cat /proc/acpi/ibm/thermal
> /sys/devices/system/cpu/cpu0/cpufreq/bios_limit
> /sys/devices/virtual/thermal/thermal_zone1/temp  /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
> 
> temperatures:   98 49 -128 85 28 -128 28 -128 49 58 -128 -128 -128
> -128 -128 -128
> 1833000
> 95000
> 1833000
> 
> Hmm. bios_limit does not seem to change, even when the temperature is
> clearly above the trip point. (It is also interestng that acpi/ibm
> reports bigger temperatures than
> /sys/devices/virtual/thermal/thermal_zone1/temp . I have seen 103C
> there.)

Under v4.8-rc, behaviour is different: bios_limit goes to 1GHz there
when temperature is around 84C at the thermal zone. That keeps
ibm/thermal temperatures under 90C, and no "thermal emergency"
messages in syslog.

So we seem to have thermal or ACPI regression in v4.9-rc3.

Best regards,
 
 									Pavel
 
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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v4.8-rc1: thinkpad x60: running at low frequency even during kernel  build Pavel Machek <pavel@ucw.cz> - 2016-11-04 09:40 +0100
  Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-04 10:00 +0100
    Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-04 10:20 +0100
      Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-04 10:30 +0100
        Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-04 10:40 +0100
          Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-11-05 19:30 +0100
            Thinkpad power management (was Re: v4.8-rc1: thinkpad x60: running  at low frequency even during kernel build) Pavel Machek <pavel@ucw.cz> - 2016-11-05 20:30 +0100
    Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-11-04 15:10 +0100
      Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-04 21:50 +0100
        Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-11-04 22:20 +0100
          Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 09:50 +0100
            Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-11-05 18:50 +0100
              Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 20:40 +0100
                Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-11-06 04:50 +0100
        Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-04 23:20 +0100
          Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-11-05 00:30 +0100
            Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 14:30 +0100
              Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-11-05 14:40 +0100
                Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 15:00 +0100
                Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 15:10 +0100
                Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-11-05 15:20 +0100
                Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 16:40 +0100
            Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-11-05 15:00 +0100
              Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 21:40 +0100
              thinkpad x60, T40p: overheat with v4.9-rc4 (was Re: v4.8-rc1:  thinkpad x60: running at low frequency even during kernel build) Pavel Machek <pavel@ucw.cz> - 2016-11-09 12:40 +0100
            Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-11-05 19:10 +0100
              Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 21:00 +0100
          Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Zhang Rui <rui.zhang@intel.com> - 2016-11-05 12:30 +0100
            Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 14:20 +0100
          Re: v4.8-rc1: thinkpad x60: running at low frequency even during  kernel build Pavel Machek <pavel@ucw.cz> - 2016-11-05 13:30 +0100

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