[Bugme-janitors] [Bug 10592] [old regression] performance drop for glx after vblank patch
bugme-daemon at bugzilla.kernel.org
bugme-daemon at bugzilla.kernel.org
Sat May 3 02:47:19 PDT 2008
http://bugzilla.kernel.org/show_bug.cgi?id=10592
------- Comment #3 from michel at tungstengraphics.com 2008-05-03 02:47 -------
On Fri, 2008-05-02 at 16:19 -0700, bugme-daemon at bugzilla.kernel.org wrote:
> >
> > This is old regression. Tested with glxgears i get this results:
> > v2.6.19 _1413.112_FPS_
> > v2.6.20 1280.060 FPS
> > v2.6.22 1300.116 FPS
> > v2.6.24 1205.895 FPS
> > v2.6.25-git* 1226.967 FPS
[...]
> I assume that we're referring to
>
> commit 3188a24c256bae0ed93d81d82db1f1bb6060d727
> Author: =?utf-8?q?Michel_D=C3=A4nzer?= <michel at tungstengraphics.com>
> Date: Mon Dec 11 18:32:27 2006 +1100
>
> i915_vblank_tasklet: Try harder to avoid tearing.
The code changed by this commit is only executed when sync-to-vblank is
enabled, which can't be the case at the framerates above.
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