Robert Watson wrote:
Experience suggests that forwarding workloads see significant lock contention in the routing and transmit queue code. The former needs some kernel hacking to address in order to improve parallelism for routing lookups. The latter is harder to address given the hardware you're using: modern 10gbps cards frequently offer multiple transmit queues that can be used independently (which our cxgb driver supports), but 1gbps cards generally don't.
Actually the routing code is not contended. The workload in router is mostly serialized without much opportunity for contention. With many interfaces and any-to-any traffic patterns it may get some contention. The locking overhead per packet is always there and has some impact though. -- Andre _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
