2015-12-05 19:02 GMT+08:00 Ruben Torrero Marijnissen < [email protected]>:
> Hi, > > I installed last week a Windows 10 guest on my flaming new Skylake > build, on top of my Arch Linux install. After doing some reading, I > understood I had to disable any Hyper-V enlightment and make KVM run in > 'hidden' mode, so my Nvidia drivers wouldn't shut down. > > However, just for the curiosity, I googled for a while and found the > last version that didn't check for KVM presence and tested the > different performance with and without Hyper-V enlightments: Oddly, > Unigine benchmark doesn't show almost *any* performance gain, but with > several games, the difference can be as big as 50% in heavily loaded > scenarios. My guess on this games that rely more on the GPU won't see > much improvements, but games that also use I/O and CPU extensively will > see a big improvement. Any idea what other reasons there could be? > IME, if you didn't add any signs in -cpu tag, or if you deleted any Hvper-V signs in VM XML file, it will disabled Hyper-V functions. And, there are many games will got unstable performance without Hyper-V, especially online games and games that use a lot of mappings. I got huge performance differences on 3DMark tests. With Hyper-V, I can got about 103xx, BUT i got only 95xx when I disabled Hyper-V. If Hyper-V checker has removed since newest driver, it's a good news, but still need to test it. Also, some graphic cards only can use previous driver, especially using in old OS. > I also read in a forum (https://lime-technology.com/forum/index.php?top > ic=43824.0) that Alex Williamson is working on a QEMU patch to allow > Windows guests to use Hyper-V enlightments without Nvidia beeing able > to detect is. Is this true?. Where could I follow the development / > test it? > You can get that patch by downloading QEMU with git version.
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