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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20161104083849.GA32688@amd>
Date:   Fri, 4 Nov 2016 09:38:49 +0100
From:   Pavel Machek <pavel@....cz>
To:     rjw@...ysocki.net, viresh.kumar@...aro.org,
        linux-pm@...r.kernel.org,
        kernel list <linux-kernel@...r.kernel.org>
Subject: v4.8-rc1: thinkpad x60: running at low frequency even during kernel
 build

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).

pavel@duo:/data/l/linux$ 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
1833000
1833000
1000000
1000000
1000000
1000000
1833000
1833000
1833000
1833000
1000000
1000000
pavel@duo:/data/l/linux

pavel@duo:/data/l/linux$ 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:1833000
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:1833000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:acpi-cpufreq
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:ondemand
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:1833000
/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

Is that expected behaviour? Any ideas?

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

Download attachment "signature.asc" of type "application/pgp-signature" (182 bytes)