On Wed, May 25, 2011 at 07:19:53PM +0200, Jose Luis Franco Arza wrote:
> >
> > That looks like OFPET_BAD_REQUEST, OFPBRC_BUFFER_UNKNOWN "Specified
> > buffer does not exist". I imagine that on the switch side you got a
> > bunch of "cookie mismatch" log messages.
> >
>
> Exactly, in the openvswitch I receive a lot of cookie mismatch messages and
> also some other log message that I don't understand at all (I read that they
> were used for debuggin openvswitch so I just ignore them)
You should be able to find a line like this in ofproto/connmgr.c in
Open vSwitch:
ofconn->pktbuf = pktbuf_create();
If you delete that line, do you see better performance? If so, then
perhaps it's time to work on making OVS suppress packet buffering in
overload conditions, or maybe to just drop support entirely.
We don't see this problem at Nicira because our controllers set up
flows proactively, not reactively.
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