Dear all, I have this very strange issue that I can not understand: Everything works flawlessly or even better than bare metal. ...thing is, if I enable stereoscopic 3d vision (nvidia) in game, the performance drops to unplayable. The reason for that are CPU /RAM intensive elements such as view distances. Dropping other graphical elements to the lowest possible value makes no difference. This means that the GPU is not the bottleneck. Tested this on bare metal and i get around 50 fps with everything maxed out. With VGA passthrough I barely get 20. Disabling 3d vision boosts everything to 60 fps. The entire 3d vision sensor usb bus is passed through as well. I am running just this VM with 8/8 cores of a fx-8230 cpu with 12 gb of ram. The cpu is passed with host-passthrough. I am even using your latest patch and had enabled hyperv extensions with nvidia GPUs. The VM is installed clean with nothing but the games in it. As said using the same drivers on a bare metal windows works flawlessly. I cannot understand where the bottleneck is. CPU usage is not even close to 100%, plenty of ram left and not even 1MB of swap is made. I don't even know where to seek the problem. What can cause such a massive fps drop? Is there any bandtwidth limit that caps the 2x rendering needed for 3d vision? I have passed the ignore msrs parameter but there is no change. I will check with dmesg though. This happens in any game: WoW, SC2, HotS, D3 ...I do not have anything besides Blizzard games to test this with, but I am pretty sure is not game related. There is absolutely nothing in dmesg. I have also tried pinning the CPU and it doesn't make any difference. Many thanks, Andrei. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
