From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 15293] Flash video laggy inside Firefox only with KMS
Date: Wed, 17 Feb 2010 16:46:59 GMT
Message-ID: <201002171646.o1HGkxAh011595@demeter.kernel.org>
References: <bug-15293-2300@http.bugzilla.kernel.org/>
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http://bugzilla.kernel.org/show_bug.cgi?id=15293


Luca Tettamanti <kronos.it@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |kronos.it@gmail.com




--- Comment #14 from Luca Tettamanti <kronos.it@gmail.com>  2010-02-17 16:46:05 ---
(In reply to comment #11)
> 1. 26% cpu time goes for allocating bo to GTT for exaGetImage (in DFS). Real
> problem in allocation is cache flush when changing pages from WB to WC and
> purge_vmap_area_lazy in ttm. But as there is report from PCIE users I don't
> believe this is problem for them.

With a PCIe card exaGetImage barely registers on oprofile. I also see very few
calls to radeon_bo_create (if that's the function you're referring to).

> Here seems to be multiple performance bugs that flash is triggering to cause
> the effects which this bug report is about.

It also seems specific to vimeo... with a normal youtube video the flash player
is using up about 30% of the cpu and I see bit of activity (5%) in pixmap
(pixman_blt_sse2).

With the video from the OP memcpy (called by Xorg) is hogging the CPU (the same
behaviour shows in the profile attacched to this bug); however I'm unable to
get a call graph from oprofile... the relevant debugging symbols are installed,
do you have any suggestions?

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