820901 - 100% CPU use on http://www.omgubuntu.co.uk/2012/11/download-an-omg-ubuntu-gnome-shell-theme

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Mayank Bansal]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121212 Firefox/20.0
Build ID: 20121212034329

Steps to reproduce:

1. Go to http://www.omgubuntu.co.uk/2012/11/download-an-omg-ubuntu-gnome-shell-theme

2. Scroll up and down.  Monitor CPU usage if possible.
3. Occurs with both HWA on and off.


Actual results:

100% CPU usage. Though the scrolling is smooth.


Expected results:

lesser CPU use. Probably a regression from bug 806099

Profile with HWA ON : http://people.mozilla.com/~bgirard/cleopatra/#report=d178bbbbd92630714a5fcfe80482780619a9f3bf

HWA OFF : http://people.mozilla.com/~bgirard/cleopatra/#report=f7a8b418b338c23308f9cccf5d3eeee495031d44

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

Of both Profiles:

Selection - Most time spent in:

    mozilla::gfx::AlphaBoxBlur::BoxBlur_SSE2(int,int,int,int,unsigned int *,unsigned int)
    mozilla::gfx::AlphaBoxBlur::BoxBlur_SSE2(int,int,int,int,unsigned int *,unsigned int)
    mozilla::gfx::AlphaBoxBlur::Blur()
    gfxAlphaBoxBlur::Paint(gfxContext *,gfxPoint const &)
    nsContextBoxBlur::DoPaint()
    nsCSSRendering::PaintBoxShadowOuter(nsPresContext *,nsRenderingContext &,nsIFrame *,nsRect const &,nsRect const &)
    nsDisplayBoxShadowOuter::Paint(nsDisplayListBuilder *,nsRenderingContext *)
    nsDisplayBoxShadowOuter::Paint
    mozilla::FrameLayerBuilder::DrawThebesLayer(mozilla::layers::ThebesLayer *,gfxContext *,nsIntRegion const &,nsIntRegion const &,void *)
    gfx::DrawThebesLayer
    ......

Comment 2

[Matt Woodrow (:mattwoodrow)]

I can't reproduce this on mac with/without hardware accleration.

Invalidation seems to be working correctly.

There is a pause when the page first starts showing the fixed position header, we are repainting the whole page once at this point. Above and below that point scrolling is smooth.

Comment 3

[(mostly gone) XtC4UaLL [:xtc4uall]]

FWIW, recent SPS Profile against Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0 ID:20130810030206 CSet: c5946a8bcd5b

http://people.mozilla.com/~bgirard/cleopatra/#report=0d18fd28960132fc1bf496cfcbec5889139d4101

loading the Site + scrolling down (HWA: on).
I don't get pegged out CPU not Invalidation Issues (nglayout.debug.paint_flashing;true).

[e-mail], can you still repro?

Comment 4

[Mayank Bansal]

the CPU usage has gone down. I think this bug can be closed now.