[tesla-dev] C-state, P-state DTrace probes

[Li, Aubrey]

On Saturday, December 01, 2007 3:28 AM, 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?
> 
> Thanks,
> -Eric

The path should not be different. 
It's just that mwait can't let the processor go into deeper c-state.
The coming idle function will include mwait path, which let the
processor go into C1,
 and the c-state driver interface, which let the processor go into C2,
C3 ...

Thanks,
-Aubrey