William, are you trying my patch for zero copy? I can send you for a try on your platform. Per your af_xdp change, I find dp_packet can use pre-allocated buffer, so I used that way, because tpacket_v3 has setup rx ring there, so dp_packet can directly use those rx ring buffer.
-----邮件原件----- 发件人: William Tu [mailto:[email protected]] 发送时间: 2020年3月17日 22:58 收件人: Yi Yang (杨燚)-云服务集团 <[email protected]> 抄送: [email protected]; [email protected]; [email protected]; [email protected] 主题: Re: [ovs-dev] 答复: [PATCH v6] Use TPACKET_V3 to accelerate veth for userspace datapath On Tue, Mar 17, 2020 at 2:08 AM Yi Yang (杨燚)-云服务集团 <[email protected]> wrote: > > Hi, William > > Finally, my highend server is available and so I can do performance > comparison again, tpacket_v3 obviously has big performance improvement, here > is my data. By the way, in order to get stable performance data, please use > taskset to pin ovs-vswitchd to a physical core (you shouldn't schedule other > task to its logical sibling core for stable performance data), iperf3 client > an iperf3 use different cores, for my case, ovs-vswitchd is pinned to core 1, > iperf3 server is pinned to core 4, iperf3 client is pinned to core 5. > > According to my test, tpacket_v3 can get about 55% improvement (from 1.34 to > 2.08, (2.08-1.34)/1.34 = 0.55) , with my further optimization (use zero copy > for receive side), it can have more improvement (from 1.34 to 2.21, > (2.21-1.34)/1.34 = 0.65), so I still think performance improvement is big, > please reconsider it again. > That's great improvement. What is your optimization "zero copy for receive side"? Does it include in the patch? Regards William _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
