On Thu, Dec 19, 2019 at 08:44:30PM -0800, Ben Pfaff wrote: > On Thu, Dec 19, 2019 at 04:41:25PM -0800, William Tu wrote: > > Currently the performance of sending packets from userspace > > ovs to kernel veth device is pretty bad as reported from YiYang[1]. > > The patch adds AF_PACKET v3, tpacket v3, as another way to > > tx/rx packet to linux device, hopefully showing better performance. > > > > AF_PACKET v3 should get closed to 1Mpps, as shown[2]. However, > > my current patch using iperf tcp shows only 1.4Gbps, maybe > > I'm doing something wrong. Also DPDK has similar implementation > > using AF_PACKET v2[3]. This is still work-in-progress but any > > feedbacks are welcome. > > Is there a good reason that this is implemented as a new kind of netdev > rather than just a new way for the existing netdev implementation to do > packet i/o?
The AF_PACKET v3 is more like PMD mode driver (the netdev-afxdp and other dpdk netdev), which has its own memory mgmt, ring structure, and polling the descriptors. So I implemented it as a new kind. I feel its pretty different than tap or existing af_packet netdev. But integrate it to the existing netdev (lib/netdev-linux.c) is also OK. William _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
