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

[Ben Widawsky]

Daniel, how do you want to handle this?

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(-)
>