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Re: Stability Under Load


On Sun, Aug 21, 2011 at 07:07:38PM +0100, Gordan Bobic wrote:
> On 08/21/2011 06:50 PM, Julian Andres Klode wrote:
> >On Sun, Aug 21, 2011 at 01:09:09PM +0100, Gordan Bobic wrote:
> >>On 08/21/2011 12:27 PM, Julian Andres Klode wrote:
> >>>On Sun, Aug 21, 2011 at 12:06:39PM +0100, Gordan Bobic wrote:
> >>I'm also curious how come my powertop is showing 1000MHz with no
> >>errors in the log when I set SM1 to 975mV.
> >Buggy powertop?
> Plausible, but /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_cur_freq
> also reports 1GHz.
Look at /sys/kernel/debug/clock/dvfs, it shows frequencies and
voltages, as scaled by DVFS and maybe attach it to your next

> I'll have to test the speed to establish it for sure, but if what
> you are saying is true, then setting SM1 upper limit to 1200 should
> have no effect anyway, because upping the voltage limit without
> changing it in all the other places you list here won't cause the
> voltage to get as high as 1200 as per what is in the git tree. Is
> that right?
Indeed. While the regulator could scale that high, the DVFS code will
only call it to scale from 750 mV to 1100 mV. At least that's what I
get told by the code.

Julian Andres Klode  - Debian Developer, Ubuntu Member

See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/.

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