Andre Oppermann writes: > Andrew Gallatin wrote: > > > FWIW, LRO triples receive performance for standard frames (3.xGb/s -> > > 9.3Gb/s) on decent hardware. > > Nice to see that. The problem with LRO at the moment is that it only > works on short RTT links (<1ms) because the TCP stack doesn't do ABC > yet and growing the send window with a LRO receiver is going to be > painfully slow as the RTT goes up.
FWIW, it is actually seems better than that on a pair of dual-package, quad core 2.66GHz Xeon X5355s: dust02% netperf243 -P0 -C -c -Hdust01-m 65536 32768 32768 10.00 2373.44 7.77 21.41 2.146 5.912 < enable lro on dust01 > dust02% netperf243 -P0 -C -c -Hdust01-m 65536 32768 32768 10.00 9271.76 9.84 22.22 0.695 1.571 > Lets add the interface capabilities flag for LRO including the ifconfig > support and be done with this episode. OK. I'm about out of time for today. If you haven't beaten me to it, I will try to do it tomorrow or the next day. I assume you're willing to review a patch? Drew _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
