On Mon, Mar 24, 2014 at 4:45 PM, Mark Delany <c...@romeo.emu.st> wrote:
> (Very recent fbsd10) > > My application is taking advantage of NR_REG_ONE_NIC to register > separate handlers for each h/w ring. (Pro tip, you must re-open > /dev/netmap each time, a dup() fd doesn't work). > > While good for performance, it unfortunately appears that NS_FORWARD > does not work in this mode - presumably because NR_REG_ONE_NIC doesn't > include the host ring. > correct, this is not a supported mode at the moment. If you want to implement it you should do it into netmap_poll() and create another constant NS_REG_ONE_NIC_SW for the new mode. The difficulty is that we do not really have the equivalent of a multiqueue host port in our system. cheers luigi > Now it's possible I simply have a bug and NS_FORWARD should work with > NR_REG_ONE_NIC - I have demo code I can share if needed - but assuming > for a moment I don't have a bug... > > What's the right way to implement host forwarding with NR_REG_ONE_NIC? > > Do I have to register an independent handler with NR_REG_SW_NIC and > have the h/w ring handlers synchronize with it? If so, I also presume > the NR_REG_SW_NIC handler has to manage transfers in both directions, > yes? > > I'm not keen on that approach if I can avoid it as it introduces > synchronization costs between handlers where previously I needed none. > > I also looked at the kernel module and determined that nr_flags = > NR_REG_ONE_NIC | NR_REG_SW_NIC is invalid. Oh well. That would have > solved my problem nicely. > > > Mark. > _______________________________________________ > 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" > -- -----------------------------------------+------------------------------- 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"
