[cairo] [PATCH 0/3] Optimize VBO size for GL and EGL

[Bryce Harrington]

Any additional comments on this patchset?  If not, I'm going to put this
into master by the end of the week.

Bryce

On Thu, Jul 31, 2014 at 06:51:32PM -0700, Bryce Harrington wrote:
> Last year I posted a patch I'd used in some experiments I did with
> varying the VBO size.[1] I'd found that this had an appreciable (8%)
> performance impact on the firefox-fishbowl tests.  Chris Wilson
> suggested some improvements[2] to enable this performance optimization
> to actually get taken advantage of.
> 
> The first patch is the original proposed patch.  The second makes the
> VBO size trackable on a per-backend basis.  The third applies the actual
> optimization, changing the default VBO size for GL to 1M while leaving
> it at 16k for EGL.
> 
> The firefox-fishbowl test case measures the performance of a large
> number of moving sprites.  I do not know of any real-world use cases
> this improves, but presumably the fishbowl test suggests that this patch
> should have some benefit to cairogl-based animation.
> 
> 1: http://www.bryceharrington.org/wordpress/2013/08/vbo-size/
> 2: http://lists.cairographics.org/archives/cairo/2013-August/024576.html
> 
> Bryce Harrington (3):
>   cairo-gl: Make VBO size run-time settable
>   gl: Track the VBO size as a property of the ctx
>   gl: Increase default VBO size on GL to 1M
> 
>  src/cairo-egl-context.c  |    6 ++++++
>  src/cairo-gl-composite.c |    3 ++-
>  src/cairo-gl-device.c    |    4 +++-
>  src/cairo-gl-info.c      |   20 ++++++++++++++++++++
>  src/cairo-gl-private.h   |    9 +++++++--
>  5 files changed, 38 insertions(+), 4 deletions(-)
> 
> -- 
> 1.7.9.5