On April 22, 2014 at 7:33:38 AM, Neelakantam Gaddam (neelugad...@gmail.com) wrote: > > I am using openvswitch-1.10.0. > > We are running openvswitch on MIPS based platform. > While sending the traffic with 10K flows, I see lot of lost statistics in > the dpctl command. I see not more than 1500 flows in the datapath. > > From my understanding, lost count is the number of packets destined to > userspace via upcall but subsequently dropped before reaching userspace. > Is my understanding correct?
Yes. > If these stats are lost upcall packets, what are the reasons for dropping > upcall packets ? How can we debug these issues ? Packets are being sent to userspace faster than they can be processed. This is usually because the packets have varying headers (e.g., a port scan) that cause misses in the exact-match flow cache in the kernel. Version 1.11 introduced megaflows, which provides a wildcarded flow cache. Version 2.0 introduced multithreading in the userspace. I'd try a newer version to see if that helps. --Justin _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
