[Bug 38800] glXSwapBuffersMscOML is slow on AMD Fusion but not on Intel 945 w/Atom

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=38800

--- Comment #40 from Michel Dänzer <michel at daenzer.net> 2011-07-08 03:05:20 PDT ---
Created an attachment (id=48883)
 View: https://bugs.freedesktop.org/attachment.cgi?id=48883
 Review: https://bugs.freedesktop.org/review?bug=38800&attachment=48883

Use new frontbuffer fence, if any

(In reply to comment #38)
> I will probably toy around with this in my spare time if we choose not
> to rewrite the entire thing now - which i would sort of prefer, given that the
> current implementation is tested to be pretty reliable on r500+ and i have
> actual users now starting to use/rely on the radeon timestamping being precise
> and reliable.

Yeah, sounds like a good plan.

However, I think we should at least fix it to use the new frontbuffer fence.
Something like the attached patch (only compile tested).


(In reply to comment #33)
> As Jerome's method is guaranteed to at least accurately report the timestamps
> of page flips, [...]

I don't understand what would prevent accurate timestamp reporting under any
circumstances.

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