Re: AMD Ryzen KVM/NPT/IOMMU issue

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Some more data from 3DMark benchmarks:

Time Spy(DirectX 12):
- Graphics test 1:
  - npt=0: 37.65 FPS
  - npt=1: 24.22 FPS (36% drop)
- Graphics test 2:
  - npt=0: 33.05 FPS
  - npt=1: 29.65 FPS (10% drop)
- CPU test:
  - npt=0: 17.35 FPS
  - npt=1: 12.03 FPS (31% drop)

Fire Strike(DirectX 11):
- Graphics test 1:
  - npt=0: 80.56 FPS
  - npt=1: 41.89 FPS (49% drop)
- Graphics test 2:
  - npt=0: 70.64 FPS
  - npt=1: 60.75 FPS (14% drop)
- Physics test:
  - npt=0: 50.14 FPS
  - npt=1: 5.78 FPS (89% drop)
- Combined test:
  - npt=0: 32.83 FPS
  - npt=1: 17.70 FPS (47% drop)

Sky Diver(DirectX 11):
- Graphics test 1:
  - npt=0: 248.81 FPS
  - npt=1: 173.63 FPS (31% drop)
- Graphics test 2:
  - npt=0: 250.49 FPS
  - npt=1: 124.84 FPS (51% drop)
- Physics test:
  - 8 threads:
    - npt=0: 140.93 FPS
    - npt=1: 119.08 FPS (15% drop)
  - 24 threads:
    - npt=0: 110.22 FPS
    - npt=1: 74.55 FPS (33% drop)
  - 48 threads:
    - npt=1: 71.56 FPS
    - npt=1: 45.93 FPS (36% drop)
  - 96 threads:
    - npt=0: 41.04 FPS
    - npt=1: 24.81 FPS (40% drop)
- Combined test:
  - npt=0: 75.65 FPS
  - npt=1: 50.45 FPS (33% drop)



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