From: Luigi Rizzo [mailto:[EMAIL PROTECTED] > On Mon, Jul 26, 2004 at 01:18:46PM -0700, Kelly Yancey wrote: > ... > > Out of curiousity, what sort of testing did you do to > arrive at these > > settings? I did some testing a while back with a SmartBits > box pumping > > packets through a FreeBSD 2.8Ghz box configured to route > between two em > > gigabit interfaces; I found that changing the burst_max and > each_burst > > parameters had almost no effect on throughput (maximum 1% > difference). > > fast boxes are pci-bus limited, not CPU limited(*) so > changing the burst > size (which basically amortizes some CPU costs) has little if any > effect.
The PCI-X bus will probably be 64-bit 133MHz in this case, the limit moves up to the P64H2 hub for large packets, to the CPU for small packets. Polling becomes quite critical to prevent livelock. --don _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
