Q1: I run vpp in kvm vm,and the software nic frontend is virtio backend is vhost-user. I test the vpp route performance with Tester(vpp code version is stable/16.09）, vm connect Tester with dpdk ovs datapath
vpp startup.conf is vppctl config is set int state interface1 up set int state interface2 up set int ip address interface1 172.16.1.1/24 set int ip address interface2 172.16.2.1/24 kvm config is as : https://wiki.fd.io/view/VPP/How_To_Optimize_Performance_(System_Tuning) vpp route forward is 80kpps. My host use E5 2630 v3 CPU In my mind ,vpp is high performance,so I think my test config for vpp may be not suitable for vpp high performance. Is my config right for vpp high performance ? Does some config make vpp faster I don't use ? Q2: After performance test，I exec the cli "show error" it show <Tx packet drop (dpdk tx faiulre)> item has so many packet. In my experience，If vpp have no cpu to forward packets, it will lose packet in dpdk rx, not tx. If lose packet in tx, I think the reason is tx nic backend in ovs dpdk datapath not timely get the packet away. But in my test environment ,dpdk ovs datapath get packet rate is 10mpps，vpp forward rate is 80kpps. Hope to you reply :-) Best Regards Yu
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