[libvirt] qemu-kvm networking speed

Daniel Veillard veillard at redhat.com
Fri Mar 13 09:02:17 UTC 2009

On Thu, Mar 12, 2009 at 04:35:22PM -0400, Bryan_Coleman at dart.biz wrote:
> When I run iperf according to 'top' my CPU % does not even go above 2%. 
> 'virt-manager' CPU usage did not go above 25%.
> Thoughts?

  Then it sounds like a bug, if the system is idle while process/domain
are trying to push data on that very system and blocked on processing
this sounds like an I/O scheduling error or something is blocking in
your test.
  An interesting point would be to test with virtIO between 2 domains
hosted on the same machine, to make sure it's not the actual networking
access which is the limiting factor, and would provide an interesting
data point.


Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
daniel at veillard.com  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/

More information about the libvir-list mailing list