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: Sat, 27 Feb 2010 06:40:44 GMT
Message-ID: <201002270640.o1R6eiS3030970@demeter.kernel.org>
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http://bugzilla.kernel.org/show_bug.cgi?id=15293
--- Comment #25 from Pauli 2010-02-27 06:39:33 ---
I vote for NOTOURBUG too.
Maybe ddx could be a bit better optimized for XGetSubImage that flash is using
but in end we can't get it perform well enough anyway without modifying the
blob.
So what exactly is happening to slow down here:
-Flash is playing the video to vram.
-Flash calls XGetSubImage multiple times per frame to read back the whole
video.
-XGetSubImage tries to copy data from VRAM to system memory but there seems to
be huge latency for CPU to read the data that was just written by GPU.
Hack patch: http://www.youtube.com/watch?v=JLkGGNbBJeI ;)
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