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

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

--- Comment #6 from Simon Farnsworth simon.farnsworth@onelan.co.uk 2011-07-01 09:54:25 PDT --- Created an attachment (id=48657) --> (https://bugs.freedesktop.org/attachment.cgi?id=48657) An adapted test program, showing that it's not the wait for the swap events that slows me down

This is a simplified version of the test program, which doesn't wait for GLX_INTEL_swap_event responses, but queues buffer swaps as fast as possible - output is substantially the same as with the original test program:

# ./swapbuffersnowaittest Screen is 1920x1200 Averaging 2.975610 frames per swap Average swap interval 49.120903 ms 122 frames, 41 swaps