[Bug 196409] kvm_amd nested pagetable gpu passthrough performance oddities

bugzilla-daemon
2017-08-30T08:36:15Z

John Kelley (john@kelley.ca) changed:

What |Removed |Added
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CC| |john@kelley.ca

--- Comment #14 from John Kelley (john@kelley.ca) ---
I am also experiencing the above mentioned issue with very similar performance
impact. I am currently not using the virtualization features due to this
performance bug with AMD Nested Page Tables.

CPU - AMD Ryzen 7 1800x
MB - Asus PRIME X370-PRO
Host GPU - AMD Radeon 480
Guest GPU - AMD Radeon r290
Host OS - Arch Linux, 4.11.9 kernel (Previously 4.9, 4.10)
Guest OS - Windows 10 Pro Anniversary Edition