dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Wed, Oct 17, 2012 at 07:56:05AM +0200, Johannes Ring wrote:
> On Wed, Oct 17, 2012 at 6:52 AM, Anders Logg <logg@xxxxxxxxx> wrote:
> > On Wed, Oct 17, 2012 at 06:38:14AM +0200, Johannes Ring wrote:
> >> On Wed, Oct 17, 2012 at 6:15 AM, Anders Logg <logg@xxxxxxxxx> wrote:
> >> > I'm having trouble building ATLAS. It seems to believe I have CPU
> >> > throttling disabled, although I've set the CPU frequency to its
> >> > maximum for all my cores and set the 'governor' to 'performance'.
> >> >
> >> > The commands in question are
> >> >
> >> >  sudo cpufreq-set -c $i -u $MAX_FREQ
> >> >  sudo cpufreq-selector -g performance -c $i
> >> >
> >> > for each processor $i.
> >> >
> >> > Any ideas how to fix this?
> >>
> >> What is set in your
> >> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor? If it is not
> >> 'performance', try changing it directly instead of using cpufrequtils:
> >>
> >>   sudo sh -c "echo performance >
> >> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"
> >>
> >> Do the same for the other CPU's.
> >
> > That's the strange thing. All 8 of those files already say
> > 'performance'.
> >
> > Does it work on your machine if you run
> >
> >   ./dorsal.sh FEniCS/platforms/contributed/precise-hpc.platform
>
> It looks ok for me. No errors and it is compiling now. I got "Cannot
> detect CPU throttling" but I'm not sure if that's good or bad.

ok good.

> BTW, I commented out the part in atlas.package where you change the
> frequency and governor because I already had it set to 'performance'.

I've made it optional now.

The strange this is all my CPUs are running at full speed but ATLAS
still thinks I have throttling on. I've also tried changing in BIOS.

Does anyone know if there's an option to turn off the throttling check
in ATLAS?

--
Anders