~/talk

Optimal buffer allocation on Wayland

Talkat FOSDEM 2022 · on Sunday, 2022-02-06· at 16:00· D.graphics· [web-platform, linux-and-operating-systems]

speaker

name:Simon Ser
mastodon:@emersion@hachyderm.io

resources

video:https://video.fosdem.org/2022/D.graphics/dmabuffeedback.mp4
slides:https://fs.emersion.fr/protected/presentations/present.html?src=dmabuf-feedback-fosdem/index.md#1

summary

Explains how Wayland compositors balance zero-copy display (using gpu/scanout-friendly buffers) against renderer-friendly allocations for clients like browsers and games, given modern GPUs only allow direct display for a few specially allocated buffers. Describes using the linux-dmabuf feedback protocol so the compositor, with its global view of surfaces, can communicate allocation preferences to clients to negotiate the optimal buffer choices.

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