On Tue, Nov 11, 2014 at 1:13 PM, Pravin Shelar <pshe...@nicira.com> wrote: > On Mon, Nov 10, 2014 at 4:00 AM, Lori Jakab <loja...@cisco.com> wrote: >> >> On 11/7/14 8:50 AM, Pravin Shelar wrote: >>> >>> On Thu, Nov 6, 2014 at 12:21 PM, Lori Jakab <loja...@cisco.com> wrote: >>>> >>>> On 11/6/14 4:06 AM, Pravin Shelar wrote: >>>>>>> >>>>>>> Have you tried running GSO traffic over lisp using OVS compat GSO code >>>>>>> and upstream GSO code? >>>>>> >>>>>> >>>>>> I haven't and I'm not sure what's the right way to do that. I do my >>>>>> testing >>>>>> between to VMs. I see with ethtool that GSO is enabled on the virtual >>>>>> NICs >>>>>> in the VMs, and on the br0 interface after the switch is created. >>>>>> >>>>> This is fine. >>>>> >>>>>> To test that I can enable/disable GSO I download a 30MB file over HTTP >>>>>> and >>>>>> look in Wireshark for packets satisfying "ip.len > 1500". With TSO >>>>>> enabled, >>>>>> I do get such packets. Not with GSO though. >>>>>> >>>>>> Can you point me to the right way to test this? >>>>> >>>>> netperf test will to the trick, But you need to test with different >>>>> kernel versions. >>>>> - kernel < 3.10 where ovs configure could not find symbol >>>>> "gre_handle_offloads" >>>>> - kernel 3.17 which has all the offload used by OVS. >>>> >>>> >>>> I have one VM with Fedora 18 and kernel 3.7.2-201.fc18.x86_64, and the >>>> other >>>> with Fedora 19 and kernel 3.14.19-100.fc19.x86_64. I tried netperf in >>>> both >>>> directions. In both cases the OVS + LISP performance vs. direct link >>>> performace was one order of magnitude worse. Is that to be expected? Is >>>> this a good enough test for GSO traffic? If yes, I will send out v7. >>>> >>> Can you give me numbers the you are seeing? One way to test GSO is to >>> look for any dropped packet at source, tcpdump can help with that. You >>> also need to set physical MTU large enough for encapsulated packet. >> >> >> I found packet loss unrelated to GSO, I need to add layer 3 support to >> ovs_packet_cmd_execute() as well. I'll get back to you after I finish this >> and I'm able to do the tests. >> > > ok. > > What are you plans regarding L3 GRE support? We need it to upstream this work.
I assume that you mean because LISP isn't upstream yet? I think we need to try to push it again so that we can resolve the differences from upstream. However, I just talked to Thomas Morin and he plans to work on L3 GRE again on top of these patches soon. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
