Re: [Qemu-devel] [Qemu-discuss] Cross-posted : Odd QXL/KVM performance issue with a Windows 7 Guest

[Brad Campbell]

On 9/9/19 11:22 pm, Dr. David Alan Gilbert wrote:
> Oh, hmm.
> Sorry I don't know too much where to look then; you have any of:
>    a) Windows
>    b) guest graphics drivers
>    c) spice server in qemu
>   
> and probalby some more.
>
> So I think it's going to be a case of profiling on the two different
> systems and see if you can spot anything in particular that stands out.

G'day Dave,

Thanks for the advice.

I ran qemu through Valgrind/callgrind and nothing excessive popped up. 
It looks like the issue might be in Windows, so I'm now trying to figure 
out how to profile inside the guest.

Suggestions as to how to profile the qxl driver while it's underway 
gratefully accepted. I'm working my way through the profiling tools in 
the Windows SDK & DDK but haven't made much headway.

Regards,
Brad