[Intel-gfx] [PATCH 02/10] drm/i915/execlists: Clear semaphore immediately upon ELSP promotion

[Chris Wilson]

Quoting Tvrtko Ursulin (2019-10-15 10:16:01)
> 
> On 14/10/2019 23:05, Chris Wilson wrote:
> > There is no significance to our delay before clearing the semaphore the
> > engine is waiting on, so release it as soon as we acknowledge the CS
> > update following our preemption request.
> 
> And significance of moving it earlier? More parallelization between GPU 
> and CPU? Could drop a note to say so.

Yup. But we talking micro optimisations on a (hopefully :) fast path.
-Chris