ovs_version: "2.0.2"
> Date: Fri, 19 Sep 2014 11:11:03 -0700
> From: b...@nicira.com
> To: sam.anda...@hotmail.com
> CC: discuss@openvswitch.org; d...@openvswitch.org
> Subject: Re: [ovs-dev] debugging OVS
>
> What version of OVS is this?
>
> On Fri, Sep 19, 2014 at 02:02:11PM -0400, samantha Andares wrote:
> > Hi ben,
> >
> > zero (0)
> >
> > root@arm:/sys/class/net/eth1/statistics# cat tx_dropped
> > 0
> >
> > if you want all the stats...
> > root@arm:/sys/class/net/eth1/statistics# cat *
> > 0
> > 0
> > 2436387
> > 0
> > 0
> > 12
> > 5
> > 0
> > 0
> > 5
> > 0
> > 0
> > 13880
> > 0
> > 4856185
> > 0
> > 0
> > 0
> > 0
> > 0
> > 0
> > 76248
> > 0
> >
> > although here's the ovs-dpctl -s show once more:
> > port 4: eth1
> > RX packets:13856 errors:5 dropped:12 overruns:0 frame:0
> > TX packets:76282 errors:0 dropped:34299 aborted:0 carrier:0
> > collisions:0
> > RX bytes:2625108 (2.5 MiB) TX bytes:4552367 (4.3 MiB)
> >
> > thanks for your time
> >
> > sam
> >
> > > Date: Fri, 19 Sep 2014 10:07:52 -0700
> > > From: b...@nicira.com
> > > To: sam.anda...@hotmail.com
> > > CC: discuss@openvswitch.org; d...@openvswitch.org
> > > Subject: Re: [ovs-dev] debugging OVS
> > >
> > > What's in /sys/class/net/eth1/statistics/tx_dropped?
> > >
> > > On Fri, Sep 19, 2014 at 11:40:25AM -0400, samantha Andares wrote:
> > > > Ben,
> > > >
> > > > Here is the output of the physical interface
> > > >
> > > > eth1 Link encap:Ethernet HWaddr 00:0e:c6:88:d2:22
> > > > inet6 addr: fe80::20e:c6ff:fe88:d222/64 Scope:Link
> > > > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > > > RX packets:1538 errors:0 dropped:12 overruns:0 frame:0
> > > > TX packets:63290 errors:0 dropped:0 overruns:0 carrier:0
> > > > collisions:0 txqueuelen:1000
> > > > RX bytes:270154 (270.1 KB) TX bytes:2966862 (2.9 MB)
> > > >
> > > > and you can see there are no dropped count in there!
> > > >
> > > > sam
> > > >
> > > > > Date: Fri, 19 Sep 2014 08:33:27 -0700
> > > > > From: b...@nicira.com
> > > > > To: sam.anda...@hotmail.com
> > > > > CC: discuss@openvswitch.org; d...@openvswitch.org
> > > > > Subject: Re: [ovs-dev] debugging OVS
> > > > >
> > > > > Can you show us the "ovs-dpctl show" output?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Ben.
> > > > >
> > > > > On Fri, Sep 19, 2014 at 11:30:05AM -0400, samantha Andares wrote:
> > > > > > 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: discuss@openvswitch.org; d...@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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