I have a computer running unraid 6.9.2 with 3 video cards and running 3 VMs each with its own dedicated video card. I made sure by pcie_acs_override=downstream that there are 3 different IOMMU groups.
Now I have the problem that the first video card responds slowly, so this VM can't actually be used for the application we need it for.
Error Message: Failed to mmap 0000:01:00.0 BAR 3. Performance may be slow.
Can someone help me to solve this so that we can also use the 3rd computer.