From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Mon, 3 Oct 2011 10:47:22 +0200
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From: Eric Noulard <eric.noulard@domain.hid>
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Subject: Re: [Xenomai-help] Frequency downscaling of new intel CPU
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To: Petr Cervenka <grugh@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

2011/10/3 Petr Cervenka <grugh@domain.hid>:
>
> Hello again.
> I know, that my problem is not so close related with the xenomai. But I t=
hink many of xenomai users with new intel CPUs have similar problem.
> I tried it it with two different main boards and none of the BIOS setting=
s helped. (C-states: disabled, Speedstep: disabled, CPU idle: high performa=
nce, TurboBoost: disabled, ...). My theory is that the linux kernel overrid=
es BIOS settings, but I don't know how to prove it.
> Any ideas that could help me?

Did you verify that you don't have any cpufred related module loaded?

What does

$ lsmod | grep cpu

indicate?

You can try that one too:

$ find /sys/devices/system -name "cpufreq"


--=20
Erk
Membre de l'April - =AB promouvoir et d=E9fendre le logiciel libre =BB -
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