[Bug 72023] [HSW fbc bisected] cairo performance reduced over 60% by enabling FBC

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72023

--- Comment #8 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #7)
> I've pushed a big pile of FBC patches here:
> git://gitorious.org/vsyrjala/linux.git fbc_stolen_fixes
> 
> Would be nice to know if the tracking improvements help with the performance.

Much! With fbc_stolen_fixes the impact of FBC on both blit/render frontbuffer
performance is ~10%, not orders of magnitude.

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