Bug 195877 - cpuspeed misses fallback for ACPI-only speed stepping
Summary: cpuspeed misses fallback for ACPI-only speed stepping
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Fedora
Classification: Fedora
Component: cpuspeed
Version: 5
Hardware: i386
OS: Linux
medium
low
Target Milestone: ---
Assignee: Dave Jones
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2006-06-19 06:35 UTC by Peter Bieringer
Modified: 2015-01-04 22:27 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2006-06-20 05:55:29 UTC
Type: ---
Embargoed:


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Description Peter Bieringer 2006-06-19 06:35:17 UTC
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):
cpuspeed-1.2.1-1.33

Additional info:
I found a nice tool called "scaler" which does the job:
http://users.utu.fi/~paemsu/scaler/

It uses /proc/acpi/processor/CPU0/throttling                                   
  for selecting CPU speed.

Can this code be implemented in "cpuspeed" as a fallback?

Comment 1 Dave Jones 2006-06-20 05:55:29 UTC
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.


Comment 2 Peter Bieringer 2006-06-20 06:03:54 UTC
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.


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