On Tuesday, September 23, 2014, Alexander V. Chernikov <melif...@freebsd.org> wrote:
> On 23.09.2014 20:00, Adrian Chadd wrote: > >> Ah, this behaviour. >> >> It's called DROP_EN on the intel igb / ixgbe hardware. Grep the >> drivers for that particular register bit/setting. >> >> Set that bit for an RX queue and it'll instruct the MAC to drop frames >> destined if that RX ring is full to it and keep receiving on the other >> rings. Otherwise yes, receiving on that ring with the ring full cuases >> the MAC to stop receiving on all rings until that ring has free space. >> >> You flip this on with ixgbe and igb by disabling tx/rx flowcontrol >> (sysctl dev.ix|igb.X.fc=0) before configuring the interface. >> > Oh, cool. > Yet another reason to turn flow control off by default. Or at least decouple the two features. Cheers Luigi > >> >> >> -a >> >> > -- -----------------------------------------+------------------------------- Prof. Luigi RIZZO, ri...@iet.unipi.it . Dip. di Ing. dell'Informazione http://www.iet.unipi.it/~luigi/ . Universita` di Pisa TEL +39-050-2211611 . via Diotisalvi 2 Mobile +39-338-6809875 . 56122 PISA (Italy) -----------------------------------------+------------------------------- _______________________________________________ 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"
