Wed, Oct 24, 2018 at 10:12:54PM CEST, michaels...@gmail.com wrote: >Hi, >I noticed that there is a performance issue when running traffic on a vlan >interface that was created by OVS. >If we create a bridge with a vlan interface, the 8021q module is not loaded. >Then when packets with a 8021q tag arrives, the linux stack can't use the >vlan ndos (such as gro_recieve) since there is no such vlan device. >If I perform the same test after loading the 8021q module, I get 2x-5x >better performance.
Could you please describe why exacly do you think you see this increase? >I personally test that using tunnels (vxlan) but I think the issue exists >even without the tunnel. > >*Creating a bridge and vlan interface:* >ovs-vsctl --no-wait add-br br_0 >ip link set br_0 up >ovs-vsctl --no-wait add-port br_0 ens5f0 >ovs-vsctl --no-wait add-port br_0 vlan10 tag=10 -- set interface vlan10 >type=internal >ip link set vlan10 up >ip addr add <ip> dev vlan10 > >run traffic (netperf on the vlan10 interface) and see the result. >Then do 'modprobe 8021q' and perform the same test -> you will see much >better numbers. > >I am suggesting to load 80021q module once vlan interface is added through >ovs. >similarly as a vlan interface would be created using 'ip link'. > >Michael _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
