[ovs-discuss] How to diagnose ponctual slowlyness?

[Ben Pfaff]

On Wed, Jan 19, 2011 at 04:35:19PM +0100, Madko wrote:
> The slowness/packet loss seems to occur when the hypervisor is having
> some IO stress. We don't have the problem on the first couple of VM we
> install on the host. It occurs more often when we already have few vms
> which are using the network thru ovs.

Have you given OVS a relatively high priority?  On XenServer we "nice"
the OVS daemons to -10 to make sure that they get CPU when they need it
to set up new flows.