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Old 10-11-06, 03:13 PM   #11
lynedavid
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Join Date: Jun 2004
Posts: 1,261
Default Re: Really bad SLI performance with benchmark applications

Quote:
Originally Posted by bugspray
Using Gnome under RedHat or Fedora (other dists should be similiar) go to Applications -> Preferences -> Keyboard Shortcuts and set a hot key for Toggle fullscreen mode . I use <Alt>F11.

I had just enough time before leaving work to try this with viewperf in SFR SLI mode and straight away the load balancing (according to the SLI HUD) started working properly!

Still, didn't have enough time to see if it actually made a real difference to performance although I would be surprised if it didn't.

What about AFR? Does this SLI mode also fall over when not in full-screen mode?

The following performance readings from viewperf (taken today before using the fullscreen mode short-cut key to fix load balancing) would suggest this:

Benchmarked with NV Driver 1.0-8774 and 8X FSAA (4 sub, 2 super).

NO SLI
=====
3dsmax-04 Weighted Geometric Mean = 7.036
catia-02 Weighted Geometric Mean = 8.191
ensight-03 Weighted Geometric Mean = 7.272
light-08 Weighted Geometric Mean = 6.355
maya-02 Weighted Geometric Mean = 19.18
proe-04 Weighted Geometric Mean = 6.828
sw-01 Weighted Geometric Mean = 15.18
ugnx-01 Weighted Geometric Mean = 2.178
tcvis-01 Weighted Geometric Mean = 2.899

SFR
===
3dsmax-04 Weighted Geometric Mean = 6.960
catia-02 Weighted Geometric Mean = 8.160
ensight-03 Weighted Geometric Mean = 8.763
light-08 Weighted Geometric Mean = 6.295
maya-02 Weighted Geometric Mean = 18.65
proe-04 Weighted Geometric Mean = 6.783
sw-01 Weighted Geometric Mean = 15.97
ugnx-01 Weighted Geometric Mean = 3.155
tcvis-01 Weighted Geometric Mean = 3.207

AFR
===
3dsmax-04 Weighted Geometric Mean = 6.978
catia-02 Weighted Geometric Mean = 8.079
ensight-03 Weighted Geometric Mean = 7.237
light-08 Weighted Geometric Mean = 6.199
maya-02 Weighted Geometric Mean = 18.67
proe-04 Weighted Geometric Mean = 6.659
sw-01 Weighted Geometric Mean = 14.98
ugnx-01 Weighted Geometric Mean = 2.218
tcvis-01 Weighted Geometric Mean = 2.888

As you can see theres virtually no difference between netween the scores here. I would of expected this with SFR due to the full-screen issue but is AFR also effected by this?


Also, i'm still slightly confused that my test app that calls the glutFullSreen function (no menu is visible after this function call and GL window fills exactly the desktop resolution) still makes SLI load balancing fall over. Whats glut not doing that the x-windows keyboard short-cut is?
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