CPUFreq HAL [PSARC/2007/679 FastTrack timeout 12/12/2007]

[Mark Haywood]

Bart Smaalders wrote:
> Casper.Dik at sun.com wrote:
>>
>>> It seems to me that multi-socket machines need to support
>>> different speeds on different sockets.
>>
>>
>> And even in some cases different speeds on different cores.
>>
>> (Barcelona in AM3 sockets)
>>
>> Casper
>>
>
> Indeed.  It would appear that one answer is CPU power management groups.
> These groups would consist of one or more virtual CPUs depending on
> the hardware capabilities; a single group would be all the virtual CPUs
> that run at the same power level. Setting the power level on one of the
> virtual CPUs would affect all the rest in that group.

Right. ACPI has a _PSD object to define this grouping.

Mark