Thread (34 messages) 34 messages, 6 authors, 2016-11-14

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

From: Pavel Machek <hidden>
Date: 2016-11-05 13:53:19
Also in: linux-acpi, lkml, platform-driver-x86

Hi!
quoted
Ok, can do, let me recompile and reboot.
quoted
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.

Best regards,
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Attachments

Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help