On Fri 2016-11-04 09:38:49, Pavel Machek wrote:
> Hi!
>
> I'm debugging overheats on v4.9-rc1... which did not seem to happen in
> v4.8-rc1. I'm running basically "nice make -j 3" on kernel... cpus are
> fully loaded.
>
> %Cpu(s): 7.5 us, 18.5 sy, 72.6 ni, 0.0 id, 0.0 wa, 0.0 hi, 1.5
> si, 0.0 st
> KiB Mem: 3087096 total, 2993076 used, 94020 free, 52900
> buffers
> KiB Swap: 1681428 total, 60900 used, 1620528 free. 1183664
> cached Mem
>
> Still, cpus don't stay on maximum frequency on v4.8-rc1. (I suspect
> that may be why machine does not overheat).
What is worse, they go to low frequency even with "performance"
governor on v4.8-rc1?!
pavel@duo:/sys/devices/system/cpu/cpu0/cpufreq$ sudo cat
/sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq ; sudo cat
/sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq ; sudo cat
/sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq ; sudo cat
/sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq ; sudo cat
/sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq ; sudo cat
/sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq
1000000
1000000
1000000
1000000
1833000
1833000
1000000
1000000
1833000
1833000
1000000
1000000
pavel@duo:/sys/devices/system/cpu/cpu0/cpufreq$ grep -i
. /sys/devices/system/cpu/cpu0/cpufreq/*
/sys/devices/system/cpu/cpu0/cpufreq/affected_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/bios_limit:1000000
grep: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq:
Permission denied
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:1833000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:1000000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency:10000
/sys/devices/system/cpu/cpu0/cpufreq/freqdomain_cpus:0 1
/sys/devices/system/cpu/cpu0/cpufreq/related_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies:1833000
1333000 1000000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:conservative
powersave schedutil ondemand performance
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:1000000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:acpi-cpufreq
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:performance
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:1000000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:1000000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:<unsupported>
grep: /sys/devices/system/cpu/cpu0/cpufreq/stats: Is a directory
pavel@duo:/sys/devices/system/cpu/cpu0/cpufreq$
Let me try v4.9-rc2... that works ok (cpus at the high frequency
during the kernel build). Unfortunately that sends my cpus to 99C
temperature range (and eventually forces emergency shutdown).
v4.9-rc2, current policy changes without me touching it. Notice the
1.47GHz below? I did not do that, it oscilates itself. Is that thermal
protection?
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.83 GHz
available frequency steps: 1.83 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: conservative, powersave, ondemand, performance, schedutil
current policy: frequency should be within 1000 MHz and 1.47 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.33 GHz.
cpufreq stats: 1.83 GHz:38.24%, 1.33 GHz:34.83%, 1000 MHz:26.94% (9929)
dmesg is full of
[ 716.196096] thinkpad_acpi: THERMAL EMERGENCY: a sensor reports
something is extremely hot!
[ 716.198181] thinkpad_acpi: temperatures (Celsius): 97 52 N/A 87 37
N/A 37 N/A 53 62 N/A N/A N/A N/A N/A N/A
but no information about thermal throttling...
Any ideas?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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