http://bugs.freedesktop.org/show_bug.cgi?id=26225
Summary: Firefox slow with accel, fast with noaccel
Product: xorg
Version: 7.4
Platform: x86-64 (AMD64)
URL: http://alteredqualia.com/visualization/evolve/
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
I was testing this wonderful little JavaScript
http://alteredqualia.com/visualization/evolve/
and noticed I only got 3 fps in Linux with Firefox, while with OtherOS I got
closer to 40.
Running top show 80% of processing time being spent in xorg. Running sysprof
shows that time being spent in the libpixman function pixman_rasterize_edges
Running xorg with NoAccel gives 30 fps. Now sysprof puts pixman_rasterize_edges
closer to 14%.
So I start by blaming the radeon driver, though I realise this could be a X,
pixman or firefox bug also of cource. :-)
Latest drm-radeon-testing kernel as of a few days back with KMS.
radeon git + noaccel patch
xserver 2:1.6.5+git20091107+server-1.6-b
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