hi ben,
thanks for your feedback.
I am getting 100% packets drop.. If problem was with the amount of messages...
I presume some would have been going through... as stated in my latest
email.... this is specific to when going out on a USB to Ethernet adaptor on a
specific hardware (beagle bone board). I am using OVS 2.0 and Ubuntu 14.04. How
can we analyse the messages in userspace and why would the message go to
userspace... shouldn't it stay in kernel space if it matches a flow and just be
forwarded to the outgoing physical port as per the rule is saying? My traffic
is simple iperf udp messages.. tried flow of 10MB and 100KB... problem is the
same...
thanks,
sam
> Date: Fri, 19 Sep 2014 08:20:24 -0700
> From: b...@nicira.com
> To: sam.anda...@hotmail.com
> CC: disc...@openvswitch.org; dev@openvswitch.org
> Subject: Re: [ovs-dev] debugging OVS
>
> [dropping mininet-discuss because it is a closed mailing list and I am
> not a subscriber]
>
> On Thu, Sep 18, 2014 at 05:37:43PM -0400, samantha Andares wrote:
> > I am getting packets dropped when going out of an OVS bridge. The TX
> > dropped is increased in ovs-dpctl but not at the physical interface
> > level (ifconfig).
> >
> > Can anyone tell me how to enable some OVS debugging so I can find the
> > reason to fix that problem?
>
> Do you mean that ovs-dpctl shows the datapath's "drop" count is going
> up? If so, the problem is that packets that need attention from
> userspace are arriving faster than userspace can process them. The best
> way to reduce drops is to upgrade to the latest version of Open vSwitch,
> which is 2.3, because we've spent a lot of time the last few years
> coming up with ways to reduce the number of packets that have to be sent
> to userspace. If you are already using 2.3, then I am surprised that
> you are seeing lots of drops. Is there anything unusual about your
> environment or the traffic that you are using?
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