Hello! > this scenario, for 76000 each of sendmsg and recvmsg calls. Solid number actually. > Am I missing something big in udp_recvmsg? What's about data copy? :-) To all that I see from profiles, top-ten are those functions which fetch/write new chunks from/to skb. > might do me another 5%, but even given this unpleasantly flat profile Well, I would say it is pleasantly :-) flat and shows that it is pretty useless to search for bottlenecks. > 4.32% udp_queue_rcv_skb # spin_lock_irqsave/restore + trivial list op Inter cpu pingpong on queue? Try to do the same on UP, this function should disappear from top-ten. Alexey - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
