[ovs-discuss] How to diagnose ponctual slowlyness?

Ben Pfaff blp at nicira.com
Wed Jan 19 17:13:38 UTC 2011

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.

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