On Nov 15, 2012, at 3:13 PM, Kyle Mestery (kmestery) <kmest...@cisco.com> wrote: > On Nov 15, 2012, at 1:03 PM, Kyle Mestery (kmestery) <kmest...@cisco.com> > wrote: >> Jesse: >> >> I modified the source port hashing for the VXLAN patch I submitted a few >> days ago, >> but I've noticed when using the upstream source port hashing routine, >> performance >> drops off by 3.5 times when using iperf between two VMs. From what I can >> tell, it >> has to be that all skbuffs coming into the VXLAN tunnel have not already had >> their >> rxhash set, and this function is what's killing performance. Let me share >> the details: >> > I think I figured this out. The upstream source port selection algorithm is > exploding flows > in the fast path. Here are iperf runs with both and subsequent "ovs-dpctl > dump-flows" > commands for comparison. The first one is with the upstream version, the > second is > with the one in my patch. Note that I just piped "ovs-dpctl dump-flows" into > wc to > summarize the flow count. > > Upstream verison: > [root@linux-br ~]# iperf -c 10.1.2.14 && ovs-dpctl dump-flows | wc
Figured this out, fixing it now, will repost the patch with only this change soon. Thanks, Kyle _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
