Hi Thank your very much for the answer! I have also read and watched some presentation about OVS and now I understand better.
I have found a presentation about OVS-DPDK and there are some points I'm not sure to understand. Screenshot: http://s29.postimg.org/ig8us188n/ovs_dpdk.png - The elements "ovs kernel module" and "kernel packet processing" and only used by dpif-linux, right ? - The element "User Space Forwarding", is it dpif-netdev ? ____ In the PORTING.md section of OVS, I have some difficulties to understand the interation between a netdev provider and a dpif provider. Which one carries the packet, first ? The netdev provider or the dpif provider ? - With OVS-DPDK, I guess netdev-dpdk is the first element to receive the packet and transmits it to the dpif-netdev (userspace), right ? Then dpif-netdev check the rules in the flow table and if they match, execute the action, and transmits it back to netdev-dpdk ? - So... in OVS generic without DPDK, does the netdev-linux receive the packet first and transmit it to the dpif-netlink ? Then dpif-netlink transmits it to the datapath in kernel ? I think I'm wrong. Thank you! Nicolas ________________________________________ De : Justin Pettit <[email protected]> Envoyé : mercredi 25 novembre 2015 09:02 À : Kury Nicolas Cc : [email protected] Objet : Re: [ovs-discuss] Architecture Open vSwitch with DPDK > On Nov 20, 2015, at 2:15 AM, Kury Nicolas <[email protected]> > wrote: > > I think I have well understood the architecture. I have my own image. > http://s22.postimg.org/p2ow45nap/ovs.png FYI. Those diagrams are tiny and hard to read. > In the PORTING section, the implementation of ofproto provider has 3 sublayer > (ofproto-dpif, dpif and dpif provider). In my image I have only written > "ofproto-dpif" to make it simpler to understand. I suppose it is also correct > ? You probably want to add the different dpif implementations (dpif-netdev and dpif-netlink), since it relates to your next set of questions. > Open vSwitch with DPDK > This part is unclear for me. My image : > http://s22.postimg.org/472lswr3l/ovs_dpdk.png > • Is there a specific implementation of ofproto provider for > DPDK ? No. It's using the userspace DPIF (dpif-netdev). > • Where is the datapath for OVS-DPDK ? In lib/dpif-netdev.c. > • Is the module openvswitch.ko still present ? If yes, does it > interact with DPDK ? No, it's not needed. > > Open vSwitch with OpenDataPlane > Do you know anything about OVS-ODP ? Not really. --Justin _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
