1804233 - Avoid sync wait of remote texture in RenderThread

Status: RESOLVED FIXED

(Core :: Graphics, enhancement, P1)

Description

[Sotaro Ikeda [:sotaro]]

After Bug 1776885 fix, in async mode, remote texture could cause a sync wait in RenderThread when WebGL task is very heavy. It is better to be avoided.

Comment 1

[Markus Stange [:mstange]]

Does this work also help with avoiding the waits on the content process main thread? Or is it only targeted at eliminating the Renderer thread wait?

Comment 2

[Sotaro Ikeda [:sotaro]]

pref webgl.out-of-process.async-present.force-sync = false already avoids the wait on the content process main thread. But it works only with Threadsafe GL case. And if it works, a wait could happen on Renderer thread in a case that oop WebGL rendering is not done.

Comment 3

[Bob Hood [:bhood]]

This issue is impacting our Speedometer 3 score by preventing Accelerated Canvas2D from running. Setting to P2/S2.

Comment 4

[Sotaro Ikeda [:sotaro]]

Attachment: WIP: Bug 1804233 - Avoid sync wait of remote texture in RenderThread

Comment 5

[Mayank Bansal]

Will this also remove other webgl/canvas related sync ipc like readpixels, getlinkresult, getCompileResult ?

Comment 6

[Sotaro Ikeda [:sotaro]]

(In reply to Mayank Bansal from comment #5)

Will this also remove other webgl/canvas related sync ipc like readpixels, getlinkresult, getCompileResult ?

It does not affect to them. The change affect only to ClientWebGLContext::GetFrontBuffer().