[Bug 27284] latest r6xx+ commits kill performance on my system

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=27284





--- Comment #23 from Martin Stolpe <martinstolpe at gmail.com>  2010-03-26 01:34:01 PST ---
(In reply to comment #21)
> (In reply to comment #18)
> > (In reply to comment #16)
> > 
> > > Is there any errors in xorg.log or dmesg when the slow down happens?
> > 
> > Nothing in dmesg - I briefly saw a different line scroll off when I quit X but
> > my fbcon scroll back seems to be limited to a couple of lines so I can't say
> > what it said. Now I've tried the other patch I'll try and recreate it and
> > redirect to a file this time.
> > 
> 
> After waiting ages and accumulating 22k reloc errors I decided to retrace my
> steps and so now I've managed to find a way to trigger this - just use flash -
> something which doesn't usually happen as I run flashblock. Unblocking a flash
> totally trashes perf even after seamonkey is closed
> 
> The error when perf is trashed is -
> 
> space check failed in flush
> 
> oprofile (not that I totally trust it) shows most time in -
> 
> 1116680  80.3342  libpixman-1.so.0.17.3    libpixman-1.so.0.17.3   
> pixman_blt_mmx
> 
> It happens with unpatched head and the first patch.
> 
> Running with the second patch alone or + the first patch fixes it.
> 

It's much better with the patches (I've tested it only with both patches
applied) but it's still possibly to provoke the slowdown. I just have to open a
few youtube tabs (videos paused). pixman_blt_mmx still seems to be problematic.


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