Luigi, On Fri, Jun 14, 2013 at 12:08:28PM +0200, Luigi Rizzo wrote: L> > I'm afraid we can't grow mbuf packet header with 8 bytes just to satisfy L> > the ALTQ codel algo, which would definitely have a limited usage among L> > FreeBSD users. Thus, "enqueue_time" should go into mbuf_tags(9) not into L> > mbuf packet header. L> L> not to take positions one way or the other, but getting and releasing L> a tag on every packet is going to kill performance.
Does ALTQ care about performance? L> If i remember well, 2-3 years ago at bsdcan there was discussion L> (and mention of some pending work, jeffr maybe ?) L> on providing some leading space in the mbuf so one could put there L> tags (e.g. ipfw and dummynet ones) without having to allocate them. L> Not sure where is this. I even tried to prototype that. -- Totus tuus, Glebius. _______________________________________________ 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"
