I can see that the packets hit the rule and the outgoing port but are
dropped... so not sure what else to look at now..... been confused for the past
few days on that issue...
thanks for your time,
sam
> Date: Fri, 19 Sep 2014 13:02:20 -0700
> From: b...@nicira.com
> To: sam.anda...@hotmail.com
> CC: disc...@openvswitch.org; dev@openvswitch.org
> Subject: Re: [ovs-dev] debugging OVS
>
> OK, after looking at all of your results, I am more confused than
> ever.
>
> Most of the stats that "ovs-dpctl -s show" reports come from exactly
> the same place in the kernel as stats reported by "ifconfig" or in
> /sys/class/net/eth1/statistics. tx_dropped and rx_dropped are among
> those. I can't explain why "ovs-dpctl" reports different numbers. In
> general, I would tend to believe the other sources.
>
> On Fri, Sep 19, 2014 at 02:13:36PM -0400, samantha Andares wrote:
> > ovs_version: "2.0.2"
> >
> > > Date: Fri, 19 Sep 2014 11:11:03 -0700
> > > From: b...@nicira.com
> > > To: sam.anda...@hotmail.com
> > > CC: disc...@openvswitch.org; dev@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: disc...@openvswitch.org; dev@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: disc...@openvswitch.org; dev@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: 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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