From: Andrew Gallatin [mailto:[EMAIL PROTECTED] > Andrew Gallatin writes: > > > xmit routine was called 683441 times. This means that the > queue was > > only a little over two packets deep on average, and vmstat > shows idle > > time. I've tried piping additional packets to nghook mx0:orphans > > input, but that does not seem to increase the queue depth. > > > > The problem here seems to be that rather than just slapping the > packets onto the driver's queue, ng_source passes the mbuf down > to more of netgraph, where there is at least one spinlock, > and the driver's ifq lock is taken and released a zillion times > by ether_output_frame(), etc. > > A quick hack (appended) to just slap the mbufs onto the if_snd queue > gets me from ~410Kpps to 1020Kpps. I also see very deep queues > with this (because I'm slamming 4K pkts onto the queue at once..). > > This is nearly identical to the linux pktgen figure on the same > hardware, which makes me feel comfortable that there is a lot of > headroom in the driver/firmware API and I'm not botching something > in the FreeBSD driver. > > BTW, did you see your 800Kpps on 4.x or 5.x? If it was 4.x, what do > you see on 5.x if you still have the same setup handy? > > Thanks,
800Kpps was on 4.7. on a dual 2.8GHz Xeon with 100MHz PCI-X on em. I will try the 5.3. --don _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
