[ltp] Re: Who's playing with scaling_max_freq?

Stefan Monnier linux-thinkpad@linux-thinkpad.org
Sat, 30 Jul 2016 22:54:51 -0400

[ FWIW, after changing the CPU from a T2400 to a T7600, I finally
  happened across some way to reduce the problem.  ]

>> causing this?  Or at least, which part of the system might cause
>> scaling_max_freq to be (re)set to 1GHz right after I force-set it to
>> 1.83GHz?
>> Would it be some daemon like systemd or rather the kernel?
> thermald might do it, but we don't install that thing by default in
> Debian AFAIK.

Not sure exactly what controls it, but at least I found out that there
is in the BIOS a setting for thermal management where I can choose
between "balanced" and "performance" (if memory serves) and which talks
about throttling.

And changing it did make a significant difference (I still can't
compile Emacs without triggering throttling, but it takes a lot longer
before it kicks in).