[Intel-gfx] [PATCH 4/5] drm/i915: Disable semaphore busywaits on saturated systems

[Ville Syrjälä]

On Mon, Apr 29, 2019 at 07:00:19PM +0100, Chris Wilson wrote:
> Asking the GPU to busywait on a memory address, perhaps not unexpectedly
> in hindsight for a shared system, leads to bus contention that affects
> CPU programs trying to concurrently access memory. This can manifest as
> a drop in transcode throughput on highly over-saturated workloads.

We can't use the singalling semaphore variant?

-- 
Ville Syrjälä
Intel