Red Hat Bugzilla – Bug 195877
cpuspeed misses fallback for ACPI-only speed stepping
Last modified: 2015-01-04 17:27:26 EST
Description of problem:
While looking for a tool which uses ACPI speed stepping I found that cpuspeed
doesn't support this.
Version-Release number of selected component (if applicable):
I found a nice tool called "scaler" which does the job:
It uses /proc/acpi/processor/CPU0/throttling
for selecting CPU speed.
Can this code be implemented in "cpuspeed" as a fallback?
throttling != speed scaling, and most of the time, it's a really bad idea.
The upstream ACPI maintainers have also talked about removing this in future
kernels, so adding things depending on it, is also a bad idea.
Ok, I understand, also I've connected a AC power meter and have to recognize,
that throtteling won't save any power at all...so "scaler" is at least on this
desktop PC useless.