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?
Bryan
Daniel Veillard <veillard@redhat.com>
03/12/2009 04:28 PM
Please respond to
veillard@redhat.com
To
Bryan_Coleman@dart.biz
cc
libvir-list@redhat.com
Subject
Re: [libvirt] qemu-kvm networking speed
On Thu, Mar 12, 2009 at 04:18:27PM -0400, Bryan_Coleman@dart.biz
wrote:
> Thank you for the suggestion. Switching to virtio and/or e1000
helped but
> still was not able to exceed 450Mb/s. It took me awhile to figure
out you
> had to either restart or reload libvirtd for the changes to take effect.
> Is there anything else I could check/change to approach 1000Mb/s or
> higher?
I don't think any of the hardware emulation layer can be faster
than
virtio, that would be very surprizing. Seems you're approaching the
limit of the capacity of the machine, I would not be surprized if you
were CPU bound at that point. There is probably tuning possibilities
but that also probably depend on other factors than just libvirt
or QEmu itself.