776796 - Crystal Skull is very slow on SGS2 with non-remote iframe

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Oleg Romashin (:romaxa)]

Tried latest b2g build on sgs2 and found that crystal-scull is ~7FPS

Disabled remote-frame (IPC) for this application, and it still slow.
Checked with gdb and found that most of the time we spend in glCopyTexSubImage2D call.

Comment 1

[Oleg Romashin (:romaxa)]

Attachment: Single EGL Image, no copy

With this patch I have ~40 FPS rate very smooth and fast on SGS2/Mali.
Do we have any other plans for pushing webgl rendering without using glCopyTexSubImage2D?

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Do we have anyone on b2g who can contact the gfx vendors and ask my CopyTexSubImage is so slow?  I can ping nvidia at least, but they're not the hardware that's involved here.

Oleg, the single egl image patch here removes the copy, but means that we'd get rendering happening to the same surface that the compositor is reading from, right?  (I know it's just for testing, but making sure that I understand what the failure is :)  Good idea though to give us an idea of what the perf impact is.

Comment 3

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

We have ARM Mali driver contacts. Mailing you privately.

Comment 4

[Kelsey Gilbert [:jgilbert]]

(In reply to Oleg Romashin (:romaxa) from comment #1)
> Created attachment 645173 [details] [diff] [review]
> Single EGL Image, no copy
> 
> With this patch I have ~40 FPS rate very smooth and fast on SGS2/Mali.
> Do we have any other plans for pushing webgl rendering without using
> glCopyTexSubImage2D?

Bug 766366.

Comment 5

[Kelsey Gilbert [:jgilbert]]

This should be solved by 716859.

This issue is only on some hardware+drivers where glCopyTexSubImage is slow. Official B2G hardware should be unaffected.

Comment 6

[Milan Sreckovic [:milan] (needinfo for best results)]

Oleg, do you still see this with b2g 1.3 or 1.4?

Comment 7

[Oleg Romashin (:romaxa)]

No this is not an issue anymore for SGS2 with latest b2g