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September 2014

SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV

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Subject:
From:
Vladimir Mosgalin <[log in to unmask]>
Reply To:
Vladimir Mosgalin <[log in to unmask]>
Date:
Mon, 22 Sep 2014 02:29:51 +0400
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Hi Steven C Timm!

 On 2014.09.21 at 22:19:31 +0000, Steven C Timm wrote next:

> The whole acpi sensor system is changed in the 3.10 kernel which is in EL7/SL7.
> There are a lot of things that work differently (or possibly not at all) including all the cpuspeed stuff.
> Google on intel_pstate module, there is a boot option to turn it off and then things
> should work as before.
> 

But it's not in use. intel_pstate requires Sandy Bridge+ CPU, and this
is Atom N2800. acpu-cpufreq driver is used instead:

# cpupower frequency-info
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 798 MHz - 1.86 GHz
  available frequency steps: 1.86 GHz, 1.60 GHz, 1.33 GHz, 1.06 GHz, 798 MHz
  available cpufreq governors: conservative, userspace, powersave, ondemand, performance
  current policy: frequency should be within 798 MHz and 1.86 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 798 MHz (asserted by call to hardware).
  boost state support:
    Supported: no
    Active: no

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