William, thank you for your test, it is one of solutions to OVS DPDK issues in OVS Conference :-), this is a kind of very cheap improving way, the performance isn't that bad, it is basically acceptable for common use cases which don't expect high network performance.
-----邮件原件----- 发件人: dev [mailto:ovs-dev-boun...@openvswitch.org] 代表 William Tu 发送时间: 2019年12月7日 12:19 收件人: yang_y...@163.com 抄送: ovs-dev <ovs-dev@openvswitch.org> 主题: [openvswitch.org代发]Re: [ovs-dev] [PATCH] Use batch process recv for tap and raw socket in netdev datapath On Thu, Dec 5, 2019 at 11:09 PM <yang_y...@163.com> wrote: > > From: Yi Yang <yangy...@inspur.com> > > Current netdev_linux_rxq_recv_tap and netdev_linux_rxq_recv_sock just > receive single packet, that is very inefficient, per my test case > which adds two tap ports or veth ports into OVS bridge > (datapath_type=netdev) and use iperf3 to do performance test between > two ports (they are set into different network name space). > > The result is as below: > > tap: 295 Mbits/sec > veth: 207 Mbits/sec > > After I change netdev_linux_rxq_recv_tap and > netdev_linux_rxq_recv_sock to use batch process, the performance is > boosted by about 7 times, here is the result: > > tap: 1.96 Gbits/sec > veth: 1.47 Gbits/sec > > Undoubtedly this is a huge improvement although it can't match OVS > kernel datapath yet. > > FYI: here is thr result for OVS kernel datapath: > > tap: 37.2 Gbits/sec > veth: 36.3 Gbits/sec > > Note: performance result is highly related with your test machine , > you shouldn't expect the same results on your test machine. Hi Yi Yang, Thanks for the patch, it's amazing with so much performance improvement. I haven't reviewed the code but Yifeng and I applied and tested this patch. Using netdev-afxdp + tap port, we do see performance improves from 300Mbps to 2Gbps in our testbed! Will add more feedback next week. William _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
