[Intel-gfx] [PATCH 0/2] semaphorify the pageflip BO (if possible)

[Daniel Vetter]

On Wed, Mar 28, 2012 at 05:23:08PM -0700, Ben Widawsky wrote:
> Daniel, how do you want to handle this?

It's somewhere on my list of things to do. I'd like to play around with
this on my ivb first just to see what's going on, but otherwise nothing to
complain about here.

Yours, Daniel
> 
> On Wed, 21 Mar 2012 17:19:11 -0700
> Ben Widawsky <ben at bwidawsk.net> wrote:
> 
> > I've not observed any FPS changes with my limited testing.
> > 
> > Here is the performance data I collected with nexuiz, measuring the
> > latency of i915_gem_object_pin_to_display_plane. Top is before, bottom
> > is after.
> > 
> >     N           Min           Max        Median           Avg
> > Stddev x 2246         0.352        37.538         2.791
> > 3.3091901     1.8631844
> > + 2239         0.281        44.517         2.699      3.088992
> > 1.583838 Difference at 95.0% confidence
> > 	-0.220198 +/- 0.101227
> > 	-6.65414% +/- 3.05896%
> > 	(Student's t, pooled s = 1.72938)
> > 
> > 
> > Ben Widawsky (2):
> >   drm/i915: extract ring sync code
> >   drm/i915: use semaphores for the display plane
> > 
> >  drivers/gpu/drm/i915/i915_drv.h            |   19 +++++++++
> >  drivers/gpu/drm/i915/i915_gem.c            |   51
> > ++++++++++++++++++++--- drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > |   60 +--------------------------- 3 files changed, 66
> > insertions(+), 64 deletions(-)
> > 
> 

-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48