[Intel-gfx] [PATCH 2/2] drm/i915: Remove obsolete ringbuffer emission for gen8+

[Chris Wilson]

On Fri, Mar 24, 2017 at 09:42:40AM +0000, Chris Wilson wrote:
> Since removing the module parameter to force selection of ringbuffer
> emission for gen8, the code is defunct. Remove it.

To put the difference into perspective, a couple of microbenchmarks (bdw i7-5557u):
                                        ring          execlists
exec continuous nops on all rings:   1.491us            2.223us
exec sequential nops on each ring:  12.508us           53.682us
single nop + sync:                   9.272us           30.291us

vblank_mode=0 glxgears:            ~11000fps           ~9000fps
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre