Hi all,
when testing my first Windows 7 guest, I noticed, that the IRQ load /
kernel time within the guest is quite high when having network access. I
use the virtio drivers - the same version as in the Windows XP guests.
There the kernel load is nearly only 50% of the Win7 load. Why? The
provided guest hardware is exactly the same... Win XP was used without
ACPI, Win7 requires it - so it is enabled on both commandlines. But I can't
imagine that this causes such a huge performance drop.
Additionally I did some CPU benchmarking and the Win7 guest results in ~
20% less in the hard/wetstone performance. Also the harddisk access is slower.
Any ideas what may cause the pure hardware performance degradation between
these two guests when having the same qemu-kvm hardware parameters (beside
the image file of course)? Any hints what to do to improve the performance
for Win7 would be appreciated.
I would at least assume that the pure CPU performance would not drop
significantly.
Thanks.
Best regards,
Erik
