[Qemu-devel] qvm86, kqemu and video speed

[Struan Bartlett]

Hi,

I've run some Windows 2000 performance tests on Qemu using a program 
called PassMark PerformanceTest. You can find some results here - 
http://www.praguespringpeople.org/Struan/Software/QEMU/Performance/2005-03-29/ 
- I'll put more there when I make them.

The results seem to me to suggest that emulated performance is weakest 
on video operations - which doesn't surprise me if it is necessary for 
every pixel change to be emulated - and while this won't be an issue for 
some Qemu users it will I expect be a major issue for others.

I understand qvm86 and kqemu provide some virtualisation of the host 
machine, including allowing the guest some direct memory access. Is it 
conceivable for these modules to be extended to allow the guest machine 
to directly write to host video memory, or else to a host memory buffer 
that is copied into the Qemu window?

Struan