803957 - coffeephysics demo is slower with HWA on

Status: RESOLVED WORKSFORME

(Core :: Graphics: Canvas2D, defect)

Description

[Mayank Bansal]

Attachment: about support.txt

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0
Build ID: 20121020030554

Steps to reproduce:

1. Enable HWA
2. open http://soulwire.github.com/Coffee-Physics/
3.Choose "Canvas" as the rendering method (default option selected is webgl)
4. Watch the FPS.  Around 6 FPS.
5. GPU usage is 99%. But ~ 6FPS only.


Now disable HWA and repeat.  The FPS is 60 and demo is quite smooth. 


Actual results:

HWA causes the demo to run slower.


Expected results:

HWA on should give better performance than HWA off.


HWA ON profile  :  http://people.mozilla.com/~bgirard/cleopatra/?report=233821d2dc456db560fd846fd1b60d3501b8a4ef

HWA OFF profile : http://people.mozilla.com/~bgirard/cleopatra/?report=a2b1876af32c0c1de7885b8d7f020195df148e39


possibly related to https://bugzilla.mozilla.org/show_bug.cgi?id=731566
but the main issue here is that HWA should be faster or on par with HWA off.

Comment 1

[Alice0775 White]

I can confirm
http://hg.mozilla.org/mozilla-central/rev/abe709bfc49a
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121021030553

Comment 2

[Mayank Bansal]

setting  layers.acceleration.disabled = false corrects this issue.
When i filed this bug, layers.acceleration.disabled = true.
What is the default setting for nightly ?

Comment 3

[Nick Cameron [:nrc]]

(In reply to mayankleoboy1 from comment #2)
> setting  layers.acceleration.disabled = false corrects this issue.
> When i filed this bug, layers.acceleration.disabled = true.
> What is the default setting for nightly ?

For Windows, default is true.

Comment 4

[Nick Cameron [:nrc]]

(In reply to Alice0775 White from comment #1)
> I can confirm
> http://hg.mozilla.org/mozilla-central/rev/abe709bfc49a
> Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0
> ID:20121021030553

I got rubbish performance and massive GC pauses whether HWA was on or off, see https://bugzilla.mozilla.org/show_bug.cgi?id=732471#c7

Comment 5

[Mayank Bansal]

In the same demo, if you select "DOM" as the rendering method, nothing is actually drawn on the screen. This also occurs in FF16.