Hi Jan, Even for the simplest case, say OVS bridge to OVS bridge connection, i couldn't find a way how to connect them using DPDK ring. If i create a DPDK ring on both sides, there are two dpdkr ports, but how do I link them. Similarly, if i create a vhostuser port in one OVS bridge, how do i connect the other OVS bridge to this vhostuser port ? shouldn't i be requiring a port pair like we get from veth pair and patch ports to link both bridges. For simplification I am considering two OVS bridges, once i am be get a clarity with this, i can look at options to connect to a different type of dpdk bridge.
Appreciate the help! On Mon, Feb 19, 2018 at 6:47 PM, Jan Scheurich <jan.scheur...@ericsson.com> wrote: > Hi Kapil, > > > > I have no practical experience with using DPDK ring ports. Whether it is > possible to connect a second non-OVS DPDK bridge to the DPDK ring pair and > how to do that will totally depend on your choice of second bridge. > > > > If I’m not mistaken, there is now also the possibility to run a second > DPDK application (i.e. your second DPDK bridge) on the host and connect to > an OVS vhostuser port through the so-called virtio-user driver. For details > see > > http://dpdk.org/doc/guides/howto/virtio_user_for_container_networking.html > > > > Perhaps that would be an alternative if your second bridge cannot connect > to DPDK rings as ports. > > > > BR, Jan > > > > *From:* Kapil A [mailto:kapil20...@gmail.com] > *Sent:* Monday, 19 February, 2018 13:41 > > *To:* Jan Scheurich <jan.scheur...@ericsson.com> > *Cc:* disc...@openvswitch.org; d...@openvswitch.org > *Subject:* Re: [ovs-dev] DPDK: How to send packets from one OVS bridge to > another OVS bridge while running in the same user space ? > > > > Hi Jan, > > > > Thanks sharing the information. For my use case, i cant run a secondary > VM, so need to look for DPDK ring port option. > > > > I didn't find much information on how to use a DPDK ring port to connect > two Bridges. i have added a dpdkr0 to a dpdk bridge, but not sure how to > connect it to another bridge. Can you please share light on how to connect > two bridges using DPDK ring ports. > > > > On Wed, Feb 14, 2018 at 1:41 PM, Jan Scheurich <jan.scheur...@ericsson.com> > wrote: > > Hi Kapil, > > > > I am afraid there is no really efficient way today to connect a user-space > (netdev-dpdk) datapath in OVS to kernel interfaces (such as internal/tap > ports or veth pairs) today. Communication works but packet I/O is very > slow compared to DPDK interfaces (both ethernet and vhostuser). The PMD > threads polling the DPDK interfaces are heavily slowed down when sending > packets to kernel ports and in the other direction all kernel interfaces > are polled by the main ovs-vswitchd thread. > > > > If your other bridge also uses DPDK in user space, you can try with DPDK > ring ports as interface between the two bridges. DPDK ring ports should be > supported in OVS. > > > > Another almost as efficient solution for sending packets from the OVS DPDK > datapath to another DPDK vSwitch would be to run the other vSwitch in a VM > and connect it to OVS-DPDK on the host through a vhostuser port. The DPDK > vSwitch in the VM would then use the virtio PMD, I expect this to be > supported by all DPDK vSwitches. > > > > BR, Jan > > > > *From:* Kapil A [mailto:kapil20...@gmail.com] > *Sent:* Wednesday, 14 February, 2018 03:47 > *To:* Jan Scheurich <jan.scheur...@ericsson.com> > *Cc:* disc...@openvswitch.org; d...@openvswitch.org > *Subject:* Re: [ovs-dev] DPDK: How to send packets from one OVS bridge to > another OVS bridge while running in the same user space ? > > > > Hi Jan, > > Thanks for the clarification. I also came across patch port as the best > option between ovs Bridges. But, is it possible to use patch ports to an > external OpenFlow bridge? Like one bridge is OVS, other is Lagopus bridge > or LINC bridge? For my use case, I want to send packets from OVS Bridge to > another OpenFlow bridge(like a loopback port) as OVS doesn't support the > functionality I am looking for. > > > > On Tue, Feb 13, 2018, 21:22 Jan Scheurich <jan.scheur...@ericsson.com> > wrote: > > Hi Kapil, > > This is what patch ports are for. They are only traversed for the first > packet of a flow in the slow path. The resulting datapath flow entry > collapses the processing in both bridges into a single megaflow. So there > is no performance overhead compared to having a single bridge. > > Regards, Jan > > > -----Original Message----- > > From: ovs-dev-boun...@openvswitch.org [mailto:ovs-dev-bounces@ > openvswitch.org] On Behalf Of Kapil A > > Sent: Tuesday, 13 February, 2018 16:44 > > To: disc...@openvswitch.org; d...@openvswitch.org > > Subject: [ovs-dev] DPDK: How to send packets from one OVS bridge to > another OVS bridge while running in the same user space ? > > > > Hello, > > > > In my setup, i have two DPDK ports, where dpdk0 is part of br0 and and > > dpdk1 is part of br1. How can i send packets from br0 to br1 in an > > efficient way within userspace with good performance? > > I came across, veth pair as one option, but i couldn't find if it will > > provide good performance in userspace while running in dpdk mode ? > > > > My query might sound odd, but i have a use case where i need to send the > > packets across bridges within the same userspace, so appreciate some help > > on this. > > > > Regards > > Kapil > > _______________________________________________ > > dev mailing list > > d...@openvswitch.org > > https://mail.openvswitch.org/mailman/listinfo/ovs-dev > > > > -- > > Regards > Kapil > > >
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