avia@scotty:~$ glxgears
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
301 frames in 5.0 seconds = 60.103 FPS
300 frames in 5.0 seconds = 59.999 FPS
298 frames in 5.0 seconds = 59.600 FPS
300 frames in 5.0 seconds = 59.836 FPS
300 frames in 5.0 seconds = 59.964 FPS
301 frames in 5.0 seconds = 60.000 FPS
300 frames in 5.0 seconds = 59.999 FPS
300 frames in 5.0 seconds = 59.997 FPS