Re: [PATCH 2/2 updated] Measure transition latency at driver initialization

["Mattia Dongili" <malattia@linux.it>]

On Fri, December 2, 2005 12:37 pm, Eric Piel said:
> 12/02/2005 12:34 AM, Mattia Dongili wrote/a écrit:
[...]
>> problematics chipsets (current testing report values ~200uSec).
> Again, I though it was done... and then Ville showed that's it's plainly
> wrong to assume anything with speedstep-smi: it could take up to 1
> second to change of frequency or few uSec. So we should probably back
> out the smi part.
>
> What I propose: modify slightly the interface of speedstep_get_freqs():
>   * if transition_latency is NULL, we don't try to update the transition
> latency,
> * otherwise we so as usual.
> Then, in speedstep-smi we can call speedstep_get_freqs() with NULL,
> voila :-)

Ok, I had something similar in mind when thinking about creating a more
general function/interface for latency measurement. We will surely need
some way to disable it.

Updated patch will follow soon.
-- 
mattia
:wq!