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1)

[powerlinux@powerlinux ~]$ glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
302 frames in 5.0 seconds = 60.301 FPS
300 frames in 5.0 seconds = 59.997 FPS
301 frames in 5.0 seconds = 59.999 FPS
300 frames in 5.0 seconds = 59.999 FPS

2)

[powerlinux@powerlinux ~]$ optirun -v -b virtualgl glxgears
[248511.567660] [INFO]Configured driver: nvidia
[248513.860019] [INFO]Response: Yes. X is active.

[248513.860037] [INFO]Running application using virtualgl.
3422 frames in 5.0 seconds = 684.218 FPS
3410 frames in 5.0 seconds = 681.887 FPS
3514 frames in 5.0 seconds = 702.728 FPS
3448 frames in 5.0 seconds = 689.598 FPS
3456 frames in 5.0 seconds = 691.127 FPS

3)

[powerlinux@powerlinux ~]$ optirun -v -b primus glxgears
[248587.707514] [INFO]Configured driver: nvidia
[248590.189814] [INFO]Response: Yes. X is active.

[248590.189833] [INFO]Running application using primus.
303 frames in 5.0 seconds = 60.563 FPS
300 frames in 5.0 seconds = 59.998 FPS
300 frames in 5.0 seconds = 59.993 FPS
300 frames in 5.0 seconds = 59.997 FPS
300 frames in 5.0 seconds = 59.998 FPS

4)

[powerlinux@powerlinux ~]$ optirun -v -c yuv -b virtualgl glxgears
[248719.254860] [INFO]Configured driver: nvidia
[248721.583246] [INFO]Response: Yes. X is active.

[248721.583287] [INFO]Running application using virtualgl.
6833 frames in 5.0 seconds = 1366.574 FPS
6900 frames in 5.0 seconds = 1379.972 FPS
6789 frames in 5.0 seconds = 1357.638 FPS
6850 frames in 5.0 seconds = 1369.842 FPS
6797 frames in 5.0 seconds = 1359.322 FPS

5)

[powerlinux@powerlinux ~]$ optirun -v -c yuv -b primus glxgears
[248796.993634] [INFO]Configured driver: nvidia
[248799.281673] [INFO]Response: Yes. X is active.

[248799.281691] [INFO]Running application using primus.
301 frames in 5.0 seconds = 60.148 FPS
301 frames in 5.0 seconds = 60.003 FPS
300 frames in 5.0 seconds = 59.998 FPS
300 frames in 5.0 seconds = 59.997 FPS
301 frames in 5.0 seconds = 60.010 FPS

6)

[powerlinux@powerlinux ~]$ vblank_mode=0 optirun -v -b virtualgl glxgears
[248984.095178] [INFO]Configured driver: nvidia
[248986.409887] [INFO]Response: Yes. X is active.

[248986.409909] [INFO]Running application using virtualgl.
3374 frames in 5.0 seconds = 674.738 FPS
3408 frames in 5.0 seconds = 681.490 FPS
3456 frames in 5.0 seconds = 691.022 FPS
3377 frames in 5.0 seconds = 675.397 FPS
3466 frames in 5.0 seconds = 693.190 FPS
3352 frames in 5.0 seconds = 670.177 FPS


7)

[powerlinux@powerlinux ~]$ vblank_mode=0 optirun -v -b primus glxgears
[248885.094980] [INFO]Configured driver: nvidia
[248887.591950] [INFO]Response: Yes. X is active.

[248887.591969] [INFO]Running application using primus.
8108 frames in 5.0 seconds = 1621.594 FPS
8427 frames in 5.0 seconds = 1685.300 FPS
8170 frames in 5.0 seconds = 1633.934 FPS
8230 frames in 5.0 seconds = 1645.870 FPS
8119 frames in 5.0 seconds = 1623.732 FPS




apparement l'option 7) est la plus performante, mais je me demande si cela n'est pas dangereux pour le materiel ?

Dangereuse je ne sais pas, mais en tout cas il est inutile d'utiliser vblank_mode=0 en temps normal. Cela désactive la synchronisation à 60 fps, or la plupart des moniteurs n'affichent pas plus de 60 fps, donc c'est faire travailler la carte graphique pour rien



Par ailleurs, bumblebee et primus sont maintenant disponibles dans les dépôts de Mageia 4 (core et nonfree/backports_testing pour l'instant), n'hésitez pas à les tester !