That's the MTU of your network interface limiting the CHDR packet size. Can't break up CHDR packets over multiple network packets.
Nick On Wed, Aug 1, 2018 at 11:25 AM Leandro Echevarría via USRP-users < usrp-users@lists.ettus.com> wrote: > Hey everybody, > > I'll somehow repeat a question I asked here a couple of months ago, to see > again if I can get some guiding. Hope you understand: > > The CHDR packet length field in the CHDR header is 16 bits (i.e. 65536 > bytes theoretical max length), but by doing Wireshark captures and playing > with the samples per paket in benchmark_rate.cpp I've seen it's never set > to be more than 7984 bytes without producing timeouts (and 7992 if no > timestamp is used I suppose). This is, I could not stream successfully with > an spp bigger than 1996. > I'm designing my own NoC block, and I'd need to know if I can form CHDR > packets of a size bigger than 7984 bytes (be it using tlast signalling, > or .SIMPLE_MODE(0) and providing a tuser header) and still not have dropped > frames. Is this possible? Or should I just default to this size to avoid > further issues? > > Thanks again, > > Leo > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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