1184859 - [Ubuntu] WebGL has extreme latency on e10s window

Status: RESOLVED WORKSFORME

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

Description

[Vasilica Tamas, QA [:vtamas]]

Note: this is a follow-up for Bug 1028859

Reproducible on: Firefox 42.0a1, Firefox 41.0a2 under Ubuntu 

STR
1.Launch Firefox with clean profile.
2.Make sure that e10s is enabled.
3.Navigate to http://madebyevan.com/webgl-water/
4.Perform some interactions.

ER
The WebGL animation works without any delay in e10s window.

AR 
The browser response time is delayed with about 4 seconds in a e10s window compared with a non-e10s window where the interaction commands are applied almost instantly.

Additional notes:
- This issue is reproducible on Firefox 42.0a1 (2015-07-16), Firefox 41.0a2 (2015-07-16) using Ubuntu 14.04 32-bit.

- Graphics:
Adapter Description	X.Org -- Gallium 0.4 on AMD RS780
Asynchronous Pan/Zoom	none
Device ID	Gallium 0.4 on AMD RS780
Driver Version	3.0 Mesa 10.1.3
GPU Accelerated Windows	0/1 Basic (OMTC)
Supports Hardware H264 Decoding	false
Vendor ID	X.Org
WebGL Renderer	X.Org -- Gallium 0.4 on AMD RS780
windowLayerManagerRemote	true
AzureCanvasBackend	cairo
AzureContentBackend	cairo
AzureFallbackCanvasBackend	none
AzureSkiaAccelerated	0
CairoUseXRender	1

Comment 1

[Kelsey Gilbert [:jgilbert]]

I think I actually am reproducing something similar to this on Windows with ANGLE disabled. Very weird, definitely worth looking into.

Comment 2

[Liviu Cirdei]

I could reproduce this on Ubuntu 14.04 64x on Aurora 46.0a2 and Nightly 47.0a1 with the following graphics:

Graphics
Adapter Description	X.Org -- Gallium 0.4 on AMD RS780
Asynchronous Pan/Zoom	wheel input enabled
Device ID	Gallium 0.4 on AMD RS780
Driver Version	3.0 Mesa 10.1.3
GPU Accelerated Windows	0/1 Basic (OMTC)
Supports Hardware H264 Decoding	No; Failed to create H264 decoder
Vendor ID	X.Org
WebGL Renderer	X.Org -- Gallium 0.4 on AMD RS780
windowLayerManagerRemote	true
AzureCanvasBackend	cairo
AzureContentBackend	cairo
AzureFallbackCanvasBackend	none
AzureSkiaAccelerated	0
CairoUseXRender	1

I also tried on Ubuntu 14.04 32x and Ubuntu 15.04 64x with Intel® Ivybridge Desktop graphics and it works as expected.

Comment 3

[u279076]

Might be an issue related to the Gallium driver. Could you please retest this in Ubuntu 15.10? 

Note: any machines you're using with Ubuntu 15.04 should be updated to 15.10 as 15.04 has reached end of life.

Comment 4

[Jim Mathies [:jimm]]

hey tracy, can you test to see how bad this is currently?

Comment 5

[Tracy Walker [:tracy]]

I can only get this demo to work on Mac;  where it works wonderfully.  

On Ubuntu 14.04 (VM), "Error: link error: error: Too many vertex shader texture samplers" is displayed instead of the demo, both in e10s and non-e10s.  I suppose that is related to the sidebar notes:

* OES_texture_float extension
** requires the OES_standard_derivatives extension

On Win 7 (VM) I get "Loading...", but it never finishes to present the demo.

Comment 6

[Sylvestre Ledru [:Sylvestre]]

Moving to p3 because no activity for at least 1 year(s).
See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information

Comment 7

[Rares Doghi, Desktop QA]

No longer occurs in our latest builds.