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List:       openvswitch-discuss
Subject:    [ovs-discuss] OVS-dpdk Packet Error for rate beyond 1MPPS
From:       haristanvir () hotmail ! com (haris tanvir)
Date:       2015-11-29 12:59:56
Message-ID: SNT151-W2556A95EBEF229EE2A1686B8010 () phx ! gbl
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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 br0OFPST_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 hostHugepage=1024Kb for OVS in hostcoremask \
=0x3(1 logical core) for Dpdk L2 Fwd in guest RegardsHaris Tanvir 		 	   		  
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