Pyun YongHyeon wrote: > On Tue, Mar 09, 2010 at 11:55:30PM +0200, Ian FREISLICH wrote: > > I set the RX as high as 512 in 64 quanta but it made little difference > > to the interrupt rate. At times where we experience the packet > > loss and com_no_buffers increases, the interrupt rate on between 1 > > and 3 of the 4 bce interfaces fell from about 3200/s to 130/s. > > > > BD chain is just one of parameters. bce(4) controllers also provide > more advanced features that fine control interrupt moderation(TX/RX > ticks). It's hard to explain all the details so you may want to > read public data sheet of bce(4).
Thanks. I'll have a read over that. I meant to state that above that whenever the interrupt rate on a controller (or several) falls off, the interrupt CPU usage climbs from about 4% to about 20%. So it seems like something is happening on host that jams up interrupt processing. Ian -- Ian Freislich _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
