Nouveau Can Beat NVIDIA With Cairo In Select Cases

[phoronix]

Phoronix: Nouveau Can Beat NVIDIA With Cairo In Select Cases

Chris Wilson has shared his testing experience of Cairo with NVIDIA ION hardware on the open-source Nouveau driver and the closed-source NVIDIA blob. In certain situations, the Cairo performance does better with Nouveau than the official NVIDIA Linux driver...

http://www.phoronix.com/vr.php?view=MTI4MTA

[mark45]

How does one interpret those bars some of which grow downwards some upwards?

[nightmarex]

How does one interpret those bars some of which grow downwards some upwards?

I'm pretty sure that the top is 11 x Faster while the bottom is 11 x Slower (or in the red). Weird graph.

[log0]

How does one interpret those bars some of which grow downwards some upwards?

Relative to not GPU accelerated path I think.

[mark45]

Oh, I noticed at the bottom right "relative to image" whatever that means. And yes, this approach sucks balls, just put another bar "Image".

[carewolf]

Unsurprising. Nouveau has always been a few orders of magniture faster than the nvidia driver on 2D acceleration. The nvidia driver has only ever had an advantage in 3D acceleration.

[mark45]

Unsurprising. Nouveau has always been a few orders of magniture faster than the nvidia driver on 2D acceleration. The nvidia driver has only ever had an advantage in 3D acceleration.

"A few orders of magnitude" means "at least a hundred times", do you really mean that?

[carewolf]

"A few orders of magnitude" means "at least a hundred times", do you really mean that?

Yes. I remember trying the XRender mode of kwin on the proprietary driver. It was slower than the generic SVGA driver. Which means it was slower than not accelerated at all. Incredible. Of course with the nouveau driver it was the other way around, with OpenGL mode being too slow.

[kokoko3k]

they know
https://devtalk.nvidia.com/default/t...e-regression-/

[liam]

they know
https://devtalk.nvidia.com/default/t...e-regression-/

I love that one of the solutions was to, basically, make cairo less powerful (specifically, not allow it draw all of the gradient types that it currently supports).