[Intel-gfx] [PATCH] drm/i915: Restrict GPU boost to the RCS engine

[Chris Wilson]

On Thu, Jun 12, 2014 at 10:28:55AM +0100, Chris Wilson wrote:
> Make the assumption that media workloads are not as latency sensitive
> for __wait_seqno, and that upclocking the GPU does not affect the BLT
> engine. Under that assumption, we only wait to forcibly upclock the GPU
> when we are stalling for results from the render pipeline.

For reference, the BLT does depend upon the gpu frequency (and acts as
a media source of busyness), and to lesser extent the ring/memory bw,
also controlled as a side-effect of gpu frequency.

Tested on ivb, i7-3720QM
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre