[Performance] Test OVS performance in same-subnet and cross-subnet scenarios

eshedg commented 8 years ago

{ split from #4 item 2}

Context

According to WuTianyi's report, OVS running on virtual machine maybe a performance bottleneck.

Compare performance of communication between 2 VMs in same subnet and on different subnets as follows:

Scenario	VM to VM (baseline)	OVS Normal to OVS Normal (VMs running OVS)	OVS OpenFlow to OVS OpenFlow (VMs running OVS)
Same Subnet
Different Subnets

For testing the OVS normal switch, connect the VM's NIC to the OVS bridge (ovs-vsctl add-port br0 eth0) and assign the IP address on the OVS bridge

For testing the OVS OpenFlow switch, add a flow to forward the test traffic (ovs-ofctl addflow br0 ...)

snapiri commented 8 years ago

Results are in the attached file. It seems like there is no difference when using the OVS in any way (differences are marginal in the error margins),

arthur-wangfeng commented 8 years ago

hi Shachar, I re-opened this issue. Issues here should be reviewed on weekly meeting before closed.