Re: [Intel-gfx] [PATCH] drm/i915: Skip waking the signaler when enabling before request submission

2017-04-26 Thread Chris Wilson
On Wed, Apr 26, 2017 at 11:35:33AM +0100, Tvrtko Ursulin wrote: > > On 26/04/2017 09:06, Chris Wilson wrote: > >If we are enabling the breadcrumbs signaling prior to submitting the > >request, we know that we cannot have missed the interrupt and can > >therefore skip immediately waking the signale

Re: [Intel-gfx] [PATCH] drm/i915: Skip waking the signaler when enabling before request submission

2017-04-26 Thread Tvrtko Ursulin
On 26/04/2017 09:06, Chris Wilson wrote: If we are enabling the breadcrumbs signaling prior to submitting the request, we know that we cannot have missed the interrupt and can therefore skip immediately waking the signaler to check. This reduces a significant chunk of the __i915_gem_request_sub

[Intel-gfx] [PATCH] drm/i915: Skip waking the signaler when enabling before request submission

2017-04-26 Thread Chris Wilson
If we are enabling the breadcrumbs signaling prior to submitting the request, we know that we cannot have missed the interrupt and can therefore skip immediately waking the signaler to check. This reduces a significant chunk of the __i915_gem_request_submit() overhead for inter-engine synchronisat