http://bugs.freedesktop.org/show_bug.cgi?id=14696





--- Comment #21 from Shuang He <[EMAIL PROTECTED]>  2008-03-02 06:03:41 PST ---
(In reply to comment #20)
> (In reply to comment #19)
> > (In reply to comment #18)
> > > (In reply to comment #17)
> > > > Created an attachment (id=14734)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14734) [details] [details] 
[details] [details]
> > > > Helps pipelining copy-backs and validation / relocation waits.
> > > > 
> > > > Ok so this patch will restore the original copy-order and have 
> > > > EAGAIN as an exception where the original arguments will be restored.
> > > > 
> > > > Can you try out and see whether you get back the original performance?
> > > > 
> > > > /Thomas
> > > > 
> > > 
> > > I tried this patch with drm git tip, it does not help.
> > > with/without the patch I both get 73.6FPS
> > > 
> > 
> > But you reported git tip at 95FPS previously?
> > None of the subsequent commits should affect i965.
> > 
> > /Thomas
> > 
> 
> oh, I can't get 95FPS even I roll back DRM to that commit. seems some other
> component is impacting this as well(we update all components every day). I'll
> try to revert everything back first, and try this patch again.
> 

I just found that this is because we have set vblank_mode to 2, but forget to
set it back to 0.

and I have tried this patch again:
without the patch, we get 94.8FPS
with the patch, we get 95.3 FPS


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