Feature #318

cpu powermanagement support with new and old state methood

Added by Petri Kunnari over 3 years ago. Updated almost 2 years ago.

Status:Closed Start date:2010-10-07
Priority:Normal Due date:
Assignee:- % Done:

0%

Category:- Spent time: -
Target version:-
Difficulty:Medium Tags:needs-triage

Description

Hi

It seems that new cpu powermanagement implementation changed how handle cpu pm features.
see openindiana bug http://www.illumos.org/issues/249

This feature request is to merge back old state methood so older processors also can have working cpu pm features.

As a reference :
http://opensolaris.org/jive/thread.jspa?messageID=424768
http://hub.opensolaris.org/bin/view/Community+Group+laptop/frkit
http://hub.opensolaris.org/bin/view/Community+Group+pm/

Thanks


Related issues

related to illumos gate - Bug #249: cpu powermanagement does not work New 2010-09-23

History

Updated by Albert Lee over 3 years ago

There is no "old driver" - powernow was always an add-on. I don't know what changed between 134 and the current build that would cause your CPU to lose frequency scaling.

Updated by Petri Kunnari over 3 years ago

Albert Lee wrote:

There is no "old driver" - powernow was always an add-on. I don't know what changed between 134 and the current build that would cause your CPU to lose frequency scaling.

Hi
Some browsing in net.
It seems frequency scaling support detection has changed what comes to P-state and C-state detection.
http://hub.opensolaris.org/bin/view/Project+tesla/CPUPM
http://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface

This feature request is : could illumos have both P and C state support ?

Updated by Milan Jurik almost 2 years ago

  • Status changed from New to Closed
  • Difficulty set to Medium
  • Tags set to needs-triage

Petri Kunnari wrote:

Albert Lee wrote:

There is no "old driver" - powernow was always an add-on. I don't know what changed between 134 and the current build that would cause your CPU to lose frequency scaling.

Hi Some browsing in net. It seems frequency scaling support detection has changed what comes to P-state and C-state detection. http://hub.opensolaris.org/bin/view/Project+tesla/CPUPM http://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface

This feature request is : could illumos have both P and C state support ?

Illumos supports for P and C state but not on your system.

This issue is more related to the problem from http://www.illumos.org/issues/249 and needs investigation there.

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