[Bug 79623] [DRI3 IVB/BYT/HSW/BDW Bisected] SynMark2 v5.3.0 OglBatch5/OglDrvCtx performance reduced 20%~40%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79623

Eero Tamminen <eero.t.tamminen at intel.com> changed:

           What    |Removed                     |Added
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                 CC|                            |eero.t.tamminen at intel.com

--- Comment #6 from Eero Tamminen <eero.t.tamminen at intel.com> ---
(In reply to comment #4)
> I begun looking at OglBatch5 on a hsw i5-4670T and have not seen a
> differential between dri2/dri3.

Are you running test in fullscreen & native resolution, or not?  This issue
might show up only in fullscreen.  Because Batch5 is partly CPU bound, you may
need also same kernel version.

Btw. How do you verify that 3D program uses DRI3?  I'm currently using Gdb over
ssh to do that checking [1], but it would be nice to have some more convenient
way.

[1] E.g. in Ubuntu 14.04 (Xorg 1.15.1 with present and dri3 extensions, kernel
3.13) with Mesa & xf86-video-intel from this week that are built with DRI3
support, aren't enough to get DRI3.  With Gdb one can see that
dri3_create_screen returns NULL and you get dri2 buffer swaps.

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