[ovs-dev] vhost-user: port is dropping packets in transmission

[Federico Iezzi]

Hello Ilya,

When you have wrote the patch could you post it also here as well?

Thanks!
Federico

On Wed, Mar 23, 2016 at 11:09 AM, Ilya Maximets <i.maximets at samsung.com>
wrote:

> On 23.03.2016 13:03, Mauricio Vásquez wrote:
> > It works,
> >
> > Then the INSTALL.DPDK file is wrong, It says that QEMU version v2.1.0+
> is required, it even says that v1.6.2 would work using a different command
> line.
> >
> > Is QEMU 2.5 also required for vhost-cuse?
> >
> > Would you mind updating that file as you know the details better than me?
> >
> > Thanks.
>
> Actually, now I think that this is a bug.
> We should mark default queue pair as enabled by default to
> support older versions of QEMU and vhost-cuse.
>
> I'll try to fix OVS to change this behaviour. After that
> all will work with older versions of QEMU.
>
> Thanks for reporting.
>
> Best regards, Ilya Maximets.
>
> >
> >
> > On Wed, Mar 23, 2016 at 10:21 AM, Ilya Maximets <i.maximets at samsung.com
> <mailto:i.maximets at samsung.com>> wrote:
> >
> >     On 23.03.2016 12:19, Mauricio Vásquez wrote:
> >     > Hi IIya,
> >     >
> >     > I'm using DPDK 2.2.0 and QEMU 2.2.1.
> >
> >     You should use QEMU 2.5.
> >
> >     > On Wed, Mar 23, 2016 at 10:18 AM, Ilya Maximets <
> i.maximets at samsung.com <mailto:i.maximets at samsung.com> <mailto:
> i.maximets at samsung.com <mailto:i.maximets at samsung.com>>> wrote:
> >     >
> >     >     What version of DPDK and QEMU you're using with OVS 2.5?
> >     >
> >     >     On 23.03.2016 12:11, Mauricio Vásquez wrote:
> >     >     > Dear all,
> >     >     >
> >     >     > I am testing a setup where two VMs have to communicate using
> vhost-user ports, it works using OvS 2.4 but it does not work with the
> master version nor with 2.5.
> >     >     >
> >     >     > The setup is quite simple, a pair of VMs connected to OvS
> using vhost-user ports, two flows configured to forward the packets between
> the VMs, ping is used to test connectivity between the VMs (ips and routing
> tables are configured).
> >     >     >
> >     >     > The problem that I can see is that a vhost-user port is
> dropping packets on transmission:
> >     >     >
> >     >     > OFPST_PORT reply (xid=0x2): 3 ports
> >     >     > port 1:
> >     >     >   rx pkts=330, bytes=14172, drop=?, errs=0, frame=?, over=?,
> crc=?
> >     >     >   tx pkts=0, bytes=0, drop=8, errs=?, coll=?
> >     >     >
> >     >     > port LOCAL:
> >     >     >   rx pkts=0, bytes=0, drop=0, errs=0, frame=0, over=0, crc=0
> >     >     >   tx pkts=0, bytes=0, drop=0, errs=0, coll=0
> >     >     >
> >     >     > port 2:
> >     >     >   rx pkts=8, bytes=648, drop=?, errs=0, frame=?, over=?,
> crc=?
> >     >     >   tx pkts=0, bytes=0, drop=330, errs=?, coll=?
> >     >     >
> >     >     > I found that somebody has a similar problem:
> http://openvswitch.org/pipermail/dev/2016-March/067152.html, I tried to
> change pmd-cpu-mask but the problem is always there. I did some debug and
> the problems is that qid is always -1 in the function
> __netdev_dpdk_vhost_send.
> >     >     >
> >     >     > Here it is some extra debug info:
> >     >     >
> >     >     > ovs-vswithd.log:
> >     >     > http://pastebin.com/2CUyjGED
> >     >     >
> >     >     > ovs-vsctl show
> >     >     > Bridge "br0"
> >     >     >   Port "br0" Interface "br0" type: internal
> >     >     >   Port "vhost-user-2" Interface "vhost-user-2" type:
> dpdkvhostuser
> >     >     >   Port "vhost-user-1" Interface "vhost-user-1" type:
> dpdkvhostuser
> >     >     >
> >     >     > ovs-appctl dpctl/show
> >     >     > netdev at ovs-netdev:
> >     >     > lookups: hit:411 missed:1 lost:0
> >     >     >   flows: 1
> >     >     >  port 0: ovs-netdev (internal)
> >     >     >  port 1: vhost-user-1 (dpdkvhostuser:
> configured_rx_queues=1,   configured_tx_queues=1, requested_rx_queues=1,
> requested_tx_queues=9)
> >     >     >  port 2: br0 (tap)
> >     >     >  port 3: vhost-user-2 (dpdkvhostuser:
> configured_rx_queues=1,  configured_tx_queues=1, requested_rx_queues=1,
> requested_tx_queues=9)
> >     >     >
> >     >     > ovs-appctl dpif-netdev/pmd-rxq-show
> >     >     > pmd thread numa_id 0 core_id 0:
> >     >     >  port: vhost-user-1 queue-id: 0
> >     >     >  port: vhost-user-2 queue-id: 0
> >     >     >
> >     >     > Thank you very much,
> >     >     >
> >     >     > Mauricio V,
> >     >
> >     >
> >
> >
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