[Xen-devel] [Xen VGA Passthrough] Performance of AMD Radeon HD 6450 in Windows 7 HVM domU Poorer Than in Bare-Metal Windows 8.1 OS

[Teo En Ming <singapore.mr.teo.en.ming@xxxxxxxxx>]

Hi,

I have got VGA Passthrough working with AMD Radeon HD 6450.

However, the performance of AMD Radeon HD 6450 in Windows 7 HVM domU is 
poorer than in bare-metal Windows 8.1 operating system. Please refer to 
the 3dmark basic edition 1.3.708 scores for AMD Radeon HD 6450 in both 
Windows 7 HVM domU and bare-metal Windows 8.1.
3dmark scores for Windows 7 HVM domU:

http://www.3dmark.com/3dm/3995208

3dmark scores for bare-metal Windows 8.1:

http://www.3dmark.com/3dm/3996885

Why is there such a great disparity in 3dmark scores for AMD Radeon HD 
6450 in Windows 7 HVM domU and in bare-metal Windows 8.1?
The performance of AMD Radeon HD 6450 in Windows 7 HVM domU is not even 
near native.
Is it possible for developers to improve the performance of AMD Radeon 
HD 6450 in Windows HVM virtual machines?
Thank you very much.

--
Yours sincerely,

Teo En Ming
Singapore


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