Mark Haywood wrote:
> Eric Saxe wrote:
>> Eric Saxe wrote:
>>> Li, Aubrey wrote:
>>>> C-state driver will let the processor go into deeper c-state.
>>>>
>>>
>>> I was thinking would use the existing mwait code path to bring the
>>> processor into the deeper c-states?
>>> ...or are you suggesting that the c-state driver would contain
>>> code that is invoked out of that path?
>>>
>> Sorry. In case you can't parse the above, let me try again. ;)
>>
>> I was thinking we would use the existing mwait code path to bring the
>> processor into the deeper c-states.
>> Are you suggesting that the c-state driver would contain the code
>> that could be invoked out of that path?...
>> or something else?
> I was wondering what we were going to do here too. Do the deeper
> c-states tend to be vendor specific mechanisms? If so, then I think we
> might want this support in a separate driver that can be accessed via
> something like layered ioctls? This is what I was thinking of doing
> with the reworked p-state support.
BTW, I don't know how expensive this kind of mechanism might be.
