Here are two old links that provide perf numbers with OVS GRE/VxLAN tunnels: http://networkheresy.com/2012/06/08/the-overhead-of-software-tunneling/ http://networkstatic.net/configuring-vxlan-and-gre-tunnels-on-openvswitch/
With br MTU= 8900 bytes, the bare-metal OVS-vxlan numbers I see is 5.3 Gbps with a single iperf thread and 9.3 Gbps with 2 iperf threads. -Rukhsana On Thu, Nov 13, 2014 at 9:04 AM, Rukhsana Ansari < rukhsana.ans...@oneconvergence.com> wrote: > Hi > > On Thu, Nov 6, 2014 at 7:27 AM, Jesse Gross <je...@nicira.com> wrote: > >> On Wed, Nov 5, 2014 at 10:58 PM, FengYu LeiDian >> <fengyuleidian0...@gmail.com> wrote: >> > 于 2014年11月06日 00:08, Jesse Gross 写道: >> > >> >> On Tue, Nov 4, 2014 at 11:03 PM, FengYu LeiDian >> >> <fengyuleidian0...@gmail.com> wrote: >> >>> >> >>> Hi >> >>> >> >>> Env: redhat 6.4, OpenvSwitch-2.1.2, using native >> >>> datapath/linux/openvswitch.ko module >> >>> >> >>> VM1 on host1, VM2 on host2, host1 and host2 are connected by a switch. >> >>> both VM enable virtio/vhost when launching VM >> >>> >> >>> case1: >> >>> VM -> tap -> ovs-bridge -> eth1 >> >>> >> >>> case2: >> >>> VM -> tap -> ovs-bridge -> vxlan -> eth1 >> >>> >> >>> When using vxlan in case2, iperf performance drop 60%, >> >> >> >> >> >> Your NIC probably doesn't support offloads (checksum, TSO, etc.) in >> >> the presence of VXLAN. >> > >> > >> > This is the default features supported by my NIC 82599 both in case1 and >> > case2. >> >> I can assure you that this NIC does not support VXLAN and the stack is >> being forced to do segmentation in software. >> >> > I have seen similar numbers (2.3 Gbps), with bare-metal Linux and OVS 2.0 > with vxlan encap - > with Intel 82599 on Ubuntu 14.04. > MTU of bridge with vxlan port was set to 1400 bytes. > Do we have reference data that 2+ Gbps number is the expected perf for a > NIC that does not support VxLAN offloads? > This older link shows 4+ Gbps with 1500 byte MTU for bare-metal vxlan perf > with OVS (1.8.9): > http://networkstatic.net/configuring-vxlan-and-gre-tunnels-on-openvswitch/ > > Thanks >
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