On 4/9/19 1:41 PM, Tom Horsley wrote:
On Tue, 9 Apr 2019 13:20:05 -0700 Samuel Sieb wrote:
what specifically is the slowdown?
From my highly non-scientific and inexact testing, the virtual disks have better I/O performance in virtualbox and in vmware. Since qemu has 47 gazillion different format virtual disks, I have no idea which one is the best performance (raw, qcow2, something else?)
That should only matter if you're doing something disk intensive. I used Windows 7 in a VM a while back and didn't have any issues with it. I wasn't doing anything that required a lot of performance though.
Also, there is no 3D graphics support in the video driver (though I see a mysterious checkbox in the latest virt-manager that says something about 3D and has a warning triangle next to it). So if the windows program you are running is willing to fall back to pure software 3D, the performance will be dreadful (though windows programs I've tried have simply refused to run without hardware 3D).
I think the only 3D support is if the guest is Linux with the 3D virtio driver.