On Sun, Apr 5, 2009 at 9:34 PM, Ivan Voras <ivo...@freebsd.org> wrote: > Robert Watson wrote: >> >> On Sun, 5 Apr 2009, Ivan Voras wrote: >> >>> I thought this has something to deal with NIC moderation (em) but >>> can't really explain it. The bad performance part (not the jump) is >>> also visible over the loopback interface. >> >> FYI, if you want high performance, you really want a card supporting >> multiple input queues -- igb, cxgb, mxge, etc. if_em-only cards are
PCI-E em(4) supports 2 RX queues. 82571/82572 support 2 TX queues. I have not tested multi-TX queues, but em(4) multi-RX queues work well in dfly (tested with 82573 and 82571) >> fundamentally less scalable in an SMP environment because they require >> input or output to occur only from one CPU at a time. > > Makes sense, but on the other hand - I see people are routing at least > 250,000 packets per seconds per direction with these cards, so they > probably aren't the bottleneck (pro/1000 pt on pci-e). It should be some variants of 82571EB Best Regards, sephe -- Live Free or Die _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
