1868397 - Avoid copies for software GPUVideoImage with WebGL

Status: RESOLVED FIXED

(Core :: Graphics: CanvasWebGL, enhancement, P3)

Description

[Andrew Osmond [:aosmond] (he/him)]

Using the infrastructure we will add in bug 1868396, we can avoid copying GPUVideoImage produced by software codecs from the RDD process into the content process and back to the compositor process, since the GPUVideoImage data already exists in compositor process.

Comment 1

[Andrew Osmond [:aosmond] (he/him)]

Attachment: Bug 1868397 - Make WebGL use VideoBridge to avoid copies with GPUVideoImage.

This patch makes it so that WebGL that runs in the compositor process
can take advantage of the fact that GPUVideoImage should have an already
created TextureHost between the compositor process and the producing
utility process. For software decoders, this will allow us to avoid a
copy into a shmem from the utility process, and another copy into a
shmem to the compositor process.

Depends on D195558

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/07825c8da728
Make WebGL use VideoBridge to avoid copies with GPUVideoImage. r=jgilbert

Comment 3

[Iulian Moraru]

https://hg.mozilla.org/mozilla-central/rev/07825c8da728

Comment 4

[Andrej (:aglavic)]

== Change summary for alert #40595 (as of Fri, 08 Dec 2023 06:11:13 GMT) ==

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
75%	glvideo Mean tick time across 100 ticks:	linux1804-64-shippable-qr	e10s fission stylo webrender	16.06 -> 4.04
75%	glvideo Mean tick time across 100 ticks:	linux1804-64-shippable-qr	e10s fission stylo webrender-sw	16.03 -> 4.04
75%	glvideo Mean tick time across 100 ticks:	linux1804-64-shippable-qr	e10s fission stylo webgl-ipc webrender	15.92 -> 4.04
74%	glvideo Mean tick time across 100 ticks:	linux1804-64-qr	e10s fission stylo webgl-ipc webrender	15.73 -> 4.06

For up to date results, see: https://treeherder.mozilla.org/perfherder/alerts?id=40595