[Bug 80705] [IVB/HSW/BYT-M/BDW] GpuTest_v0.5_triangle performance slower by 10%~50% in fullscreen than in windowed & composited mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80705

--- Comment #3 from Alejandro Piñeiro (freenode IRC: apinheiro) <apinheiro at igalia.com> ---
Created attachment 117594
  --> https://bugs.freedesktop.org/attachment.cgi?id=117594&action=edit
Equivalent test to the one the bug was reported too

Although the test itself is just the basic triangle example, I uploaded the
example I was using as the source code of the original test is not available.
This also confirms that the bug doesn't come from the bug.

If you want to test it without vsync and get the fps, just use envvars. 

So if you want to to test what mentioned on comment 0, for fullscreen:

vblank_mode=0 LIBGL_SHOW_FPS=1 LIBGL_DEBUG=verbose ./simple-opengl-test 1920
1080 1

For windowed:

vblank_mode=0 LIBGL_SHOW_FPS=1 LIBGL_DEBUG=verbose ./simple-opengl-test 1920
1080 0

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