Re: [Intel-gfx] [CI 3/5] drm/i915: Disable semaphores on Sandybridge

2017-11-21 Thread Chris Wilson
Quoting Jani Nikula (2017-11-21 10:23:44) > On Tue, 21 Nov 2017, Chris Wilson wrote: > > Quoting Jani Nikula (2017-11-21 09:57:30) > >> On Mon, 20 Nov 2017, Chris Wilson wrote: > >> > I should have admitted defeat long ago as there has been a rare but > >> > persistent error on Sandybridge where

Re: [Intel-gfx] [CI 3/5] drm/i915: Disable semaphores on Sandybridge

2017-11-21 Thread Jani Nikula
On Tue, 21 Nov 2017, Chris Wilson wrote: > Quoting Jani Nikula (2017-11-21 09:57:30) >> On Mon, 20 Nov 2017, Chris Wilson wrote: >> > I should have admitted defeat long ago as there has been a rare but >> > persistent error on Sandybridge where semaphore signaling did not >> > propagate to the wa

Re: [Intel-gfx] [CI 3/5] drm/i915: Disable semaphores on Sandybridge

2017-11-21 Thread Chris Wilson
Quoting Jani Nikula (2017-11-21 09:57:30) > On Mon, 20 Nov 2017, Chris Wilson wrote: > > I should have admitted defeat long ago as there has been a rare but > > persistent error on Sandybridge where semaphore signaling did not > > propagate to the waiter, leading to a GPU hang. > > I'm late to th

Re: [Intel-gfx] [CI 3/5] drm/i915: Disable semaphores on Sandybridge

2017-11-21 Thread Jani Nikula
On Mon, 20 Nov 2017, Chris Wilson wrote: > I should have admitted defeat long ago as there has been a rare but > persistent error on Sandybridge where semaphore signaling did not > propagate to the waiter, leading to a GPU hang. I'm late to the party, but I think the choice of patch ordering here

[Intel-gfx] [CI 3/5] drm/i915: Disable semaphores on Sandybridge

2017-11-20 Thread Chris Wilson
I should have admitted defeat long ago as there has been a rare but persistent error on Sandybridge where semaphore signaling did not propagate to the waiter, leading to a GPU hang. With the work on fence signaling for v4.9, the impact of using CPU driven signaling was greatly reduced wrt to the l

[Intel-gfx] [CI 3/5] drm/i915: Disable semaphores on Sandybridge

2017-11-20 Thread Chris Wilson
I should have admitted defeat long ago as there has been a rare but persistent error on Sandybridge where semaphore signaling did not propagate to the waiter, leading to a GPU hang. With the work on fence signaling for v4.9, the impact of using CPU driven signaling was greatly reduced wrt to the l