[Bug 26599] Radeon DDX 6.12.99 (git 47136fa) performance regression

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=26599





--- Comment #5 from Alex Deucher <agd5f at yahoo.com>  2010-02-18 20:37:49 PST ---
(In reply to comment #4)
> I made a local branch in git off of the vline commit, reverted it in the
> branch, and merged master onto the branch.  Performance is restored, plus
> everything seems a little bit faster than before!  (Maybe Pauli's stuff causing
> that?  Or maybe hallucinating....)  
> 

His changes only affect Xv.

> From what I understand about vline, it's something I want.  Is the performance
> hit something that an app (like 'torcs') could find a workaround for, or is the
> hit unavoidable?

It avoids tearing on GL buffers swaps by waiting until the scanout is past the
part of the screen being updated.


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