Qemu + VFIO GPU RadeonRX 550 + AmigaOS4 extremely slow

@Capehill

This is the one for science, using Radeon RX550 as the guinea pig:
https://ibb.co/mvX14CZ

@Georg
Quote:GetUpTime() results are reliable.
While it's not as easy on most PowerPC CPUs as it's on POWER and G2 CPUs (TBU = seconds, TBL = nanoseconds, overflow after 136 years) it should still be in the range of years or at least months.
Disable() may disable the TBL overflow interrupt, but not stop the 64 bit TimeBase registers from increasing monotonously.
IIRC AmigaOS 4.x uses a fraction of the FSB speed for the TimeBase register increments, but even if not and it's using something else it can be checked with the ReadEClock() return value what frequency it's using.

@nikitas
Quote:It's working correctly with the RX card, which was expected. Only with the HD card something is seriously wrong.

Something completely unrelated:
Your text output looks bad. Are you using USA or Canada as country in the Locale prefs?
If yes sub-pixel rendering may sill be disabled in the diskfont/ft2.library text rendering functions, which had to be done because of some patent issues.