995683 - [e10s] Animations are not smooth

Status: RESOLVED WORKSFORME

(Core :: Graphics: Layers, defect)

Description

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

STR:

1. Visit the URL http://test.monoclejs.com/test/showcase/01-velveteen/index.html
2. Wait a second or two for it to finish loading.
3. Click on the center image. You should see the page slide away and a new page slide into place.

In e10s, the page slide animation usually janks for a moment about 80% of the way through. Without e10s, it's smooth.

Comment 1

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

I just tried the same site with basic layers and it works fine. So it's something particular to e10s. I see this a lot when scrolling with smooth scrolling enabled. It will do most of the scroll, then there will be a slight pause, and then it will scroll just a little bit more.

Comment 2

[Andreas Gal :gal]

Can you capture a profile?

Comment 3

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

The Gecko profiler doesn't seem to work with e10s.

Comment 4

[Andreas Gal :gal]

We are using it with FFOS. BenWa?

Comment 5

[Benoit Girard (:BenWa)]

The code for FFOS uses a POSIX signals and a final merge script. It's also designed to work with a host to control the profiler. So it's really a special snow flake that I would rather not emulate since e10s isn't limited to POSIX.

For e10s ideally we would just port the extension to e10s and add a few simple IPC messages or better yet use the RDP protocol.

Comment 6

[Benoit Girard (:BenWa)]

You can use the profiler but you can't see the content process' main thread.

I can't reproduce the bug with e10s on mac.

Comment 7

[Benoit Jacob [:bjacob] (mostly away)]

I don't reproduce non-smoothness here; linux x86-64, fedora, in an e10s window, and this about:support:

 Graphics
Adapter Description	Intel Open Source Technology Center -- Mesa DRI Intel(R) Sandybridge Mobile
Device ID	Mesa DRI Intel(R) Sandybridge Mobile
Driver Version	3.0 Mesa 10.0.4
GPU Accelerated Windows	2/2 OpenGL (OMTC)
Vendor ID	Intel Open Source Technology Center
WebGL Renderer	Intel Open Source Technology Center -- Mesa DRI Intel(R) Sandybridge Mobile
windowLayerManagerRemote	true
AzureCanvasBackend	cairo
AzureContentBackend	cairo
AzureFallbackCanvasBackend	none
AzureSkiaAccelerated	0

Comment 8

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

I'm not seeing this anymore. Maybe it got fixed, or maybe it's just harder than I thought to reproduce.