Gentoo Archives: gentoo-user

From: Walter Dnes <waltdnes@××××××××.org>
To: Gentoo Users List <gentoo-user@l.g.o>
Subject: [gentoo-user] CPU speed scaling quirk (Intel; Dell i660)
Date: Thu, 05 Mar 2020 00:28:34
Message-Id: 20200305002821.GB21266@waltdnes.org
I've cobbled together a script to select cpu governors and speeds.
One weird thing I've noticed is that reported cpu speed doesn't quite
match the selected speed.  E.g. on my machine (yours will vary)...

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

...shows avalable speeds...

3001000 3000000 2900000 2800000 2700000 2600000 2500000 2400000 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000

  ***IMPORTANT*** "userspace" governor must be present.

  /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq reports speeds
very close to, but slightly lower than the selected values, and they also
seem to jump around a bit.  What gives?

-- 
Walter Dnes <waltdnes@××××××××.org>
I don't run "desktop environments"; I run useful applications

Replies

Subject Author
Re: [gentoo-user] CPU speed scaling quirk (Intel; Dell i660) madscientistatlarge <madscientistatlarge@××××××××××.com>
Re: [gentoo-user] CPU speed scaling quirk (Intel; Dell i660) Michael <confabulate@××××××××.com>