[Mesa-dev] [Bug 55998] Pretty huge slowdown in mesa 9.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=55998

Kenneth Graunke <kenneth at whitecape.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTOURBUG

--- Comment #26 from Kenneth Graunke <kenneth at whitecape.org> ---
(In reply to comment #25)
> I've pushed a patch to KWin that should fix the problem. The patch is in
> both master and the 4.9 branch, so you should see it in 4.9.3. That release
> will be tagged on Thursday.

Thanks Fredrik!  Based on that, I'm closing this as RESOLVED/NOTOURBUG.

> @Rune: The GLX backend in KWin uses glXGetFBConfigs(), so the ordering rules
> in the spec don't apply here. I've thought about rewriting that code to use
> glXChooseFBConfig(), but I'm reluctant to touch working code without a good
> reason. This bug might be enough of a reason to do that though.

@Rune: Feel free to double check by running glxinfo, but I believe the ordering
is correct: multisample configs are always sorted later, as required.

Using glXChooseFBConfig() does seem like a good idea...could guard against
future problems (though I don't know what), and should simplify the code a fair
bit.  Also, KWin's EGL backend uses eglChooseConfig() and it never had this
problem.  That would also make the GLX and EGL backends more similar.

Thanks again.

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