> -----Original Message----- > From: discuss [mailto:[email protected]] On Behalf Of haris > tanvir > Sent: Sunday, November 29, 2015 1:00 PM > To: [email protected] > Subject: [ovs-discuss] OVS-dpdk Packet Error for rate beyond 1MPPS > > Hi, > I have configured OVS on a host with dpdk. I have created a net-dev type > bridge and assigned one physical port and one vhost user ports to it.Then, I > have created a VM using libvirt and assigned vhost user port to the VM. I am > running dpdk L2 Forward Application inside VM (using dpdk poll mode driver). > > I have another machine which as has Packet-gen dpdk running on a host. > > When I send Traffic from Virtual Machine to the VM through dpdk at rate > 1Million packet per second(64byte packet), L2 forward in the VM just works > fine with zero drop rate. However, when I go beyond 1Million Packet per > second from packet gen, i see packet errors in OVS physical ports, and as a > result any additional packets above 1MPPS does not reach VM. Please do let > me know why I am facing this issue. > > OVS OUTPUT: > ovs-ofctl dump-ports br0 > OFPST_PORT reply (xid=0x2): 3 ports > port LOCAL: rx pkts=0, bytes=0, drop=0, errs=0, frame=0, over=0, crc=0 > tx pkts=292126777, bytes=17527676820, drop=0, errs=0, coll=0 > port 1: rx pkts=4917972248, bytes=333253670655, drop=0, errs=7153546496, > frame=0, over=0, crc=0 > tx pkts=4917673320, bytes=333233296044, drop=0, errs=0, coll=0 > port 2: rx pkts=4917673320, bytes=?, drop=?, errs=?, frame=?, over=?, > crc=? > tx pkts=4917967282, bytes=?, drop=287, errs=?, coll=? > > > LIBVIRT TAG to create VM: > <interface type='vhostuser'> > <mac address='52:54:00:3b:83:1a'/> > <source type='unix' path='/usr/local/var/run/openvswitch/dpdkvhost0' > mode='client'/> > <model type='virtio'/> > <driver> > <host csum='off' gso='off' tso4='off' tso6='off' ecn='off' > ufo='off'/> > <guest csum='off' tso4='off' tso6='off' ecn='off' ufo='off'/> > </driver> > <address type='pci' domain='0x0000' bus='0x00' slot='0x07' > function='0x0'/> > </interface> > > OVS performance parameters: > coremask = 0x100 (2 sibling cores) for the OVS on host
Which coremask? -c command line arg or pmd-cpu-mask ? Have a look with top and check that the forwarding in the guest and pmd are not on the same core. Also, have a look at PMD affinitization in the performance tuning section. https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md#performance-tuning > Hugepage=1024Kb for OVS in host > coremask =0x3(1 logical core) for Dpdk L2 Fwd in guest > > Regards > Haris Tanvir _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
