Intel Adds Native One-Copy Texture Uploads To Chrome OS

[phoronix]

Phoronix: Intel Adds Native One-Copy Texture Uploads To Chrome OS

Engineers at Intel's Open-Source Technology Center have implemented native, one-copy texture uploads for Chrome/Chromium OS when using Intel graphics processors...

http://www.phoronix.com/scan.php?page=news_item&px=Intel-ChromeOS-Tex-Uploads

[kmare]

That looks quite interesting. Does anyone know if that work could be applied to the xorg/wayland drivers as well? Does that even make sense?

[smitty3268]

Hmm, interesting.

In summary:

0-copy is much faster when there is animation going on, but regresses for static content because it uses non-tiled textures and that increases cache misses.

So they went with the 1-copy solution (gpu-gpu copy rather than a cpu-gpu copy that is currently done) which has much more modest gains in most cases but doesn't regress anything.

[smitty3268]

That looks quite interesting. Does anyone know if that work could be applied to the xorg/wayland drivers as well? Does that even make sense?

I believe some of the planes work in wayland was meant to enable zero-copy support for things like videos, and that it wasn't really feasible in x at least not without a lot of work and rewriting.