Gentoo Archives: gentoo-user

From: Walter Dnes <waltdnes@××××××××.org>
To: Gentoo Users List <gentoo-user@l.g.o>
Subject: [gentoo-user] Userspace CPU frequency scaling not available on one machine
Date: Wed, 01 Nov 2017 03:13:07
I've cobbled together a script that runs under eselect to list/set
COU speeds/governors on my machines.  I set max speed when I'm using
the machine, and min speed when not.  It has run fine so far, except
recently on an Intel Silvermont machine (64-bit Atom family) running
Gentoo kernel 4.12.12.  Userspace CPU control is not available, even
though I've asked for it under "make menuconfig".  On other machines

conservative userspace ondemand performance

...but on this one machine it only shows...

performance powersave I know it's the machine, not my script, that's the problem.  Note
that I set conservative, performance, powersave, and userspace in the
"make menuconfig" process, and made userspace the default governor.  One
difference I noticed on the Silvermont is CONFIG_X86_INTEL_PSTATE=y
which is the opposite of the machines that things work properly on.  So
I went into "make menuconfig" to try to switch it off, but I get...

    -*-   Intel P state control

  Yes, it is *FORCED* on on that one machine.  Now what?  I'm attaching
/proc/config.gz from the Silvermont in case it helps.  Feel free to
comment on other stuff in config.gz as well.

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


File name MIME type
config.gz application/octet-stream


Subject Author
Re: [gentoo-user] Userspace CPU frequency scaling not available on one machine Ramon Fischer <Ramon_Fischer@×××××××.de>