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

[Pavel Machek]

On Sat 2016-11-05 14:53:13, Pavel Machek wrote:
> Hi!
> 
> > > Ok, can do, let me recompile and reboot.
> > > 
> > > > 
> > > > When temperature limit is reached acpi_processor_ppc_notifier()
> > > > should
> > > > be called.
> > > 
> > > No, that's not correct for ACPI passive trip points, is it? If I
> > > recall correctly, those should be monitored even when temperature is
> > > below them so that it does not reach them...?
> > No if BIOS is sending PPC, it will be called. You can try first in 4.8.
> > 
> > Also try
> > 
> > Don't run workload, just on an idle system.
> > 
> > # echo 1 > /sys/class/thermal/cooling_device2/cur_state
> > monitor the scaling_max_freq, it should reduce
> > 
> > # echo 2 > /sys/class/thermal/cooling_device2/cur_state
> > monitor the scaling_max_freq, it should reduce
> 
> Yes, this seems to work. scaling_max goes to 1.5, then 1.1. Also under
> load, scaling_max_freq changes. But at that point, we are already
> around 98C... and bios_limit stays the same all the time in v4.9.

...while in v4.8-rc1, bios limit goes to 1.0 GHz at 90C, and
temperature just doesn't go above that.

Does it make sense to try with v4.8-final?

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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