Thanks for the suggestion, Jeff. Unfortunately, that didn't seem to help. I still see bursty packet transmission.
Btw, currently I have: USRP source --> Low-Pass Filter --> ComplexToInterleavedShort --> Endian Swap --> UDP Sink. I added the set_max_noutput_items line at the output of the Endian Swap block since that would be the input to UDP. Is that the only place where I would have to make that change, or on all the blocks? Thanks! <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sun, Mar 4, 2018 at 6:44 AM, Jeff Long <willco...@gmail.com> wrote: > Try yourblock.set_max_noutput_items(1024/itemsize) > > > On 03/03/2018 09:57 PM, Firdavs Pulat wrote: > >> Hello everyone, >> >> I have a B200mini device I'm communicating over USB to a pc which is >> running the gnuradio software. The gnuradio does some processing (e.g., >> low-pass filtering, data type conversion, etc), and finally gets to the UDP >> sink block where packets are generated and sent through Ethernet to an >> external device. The issue I'm having is that, in the UDP block, >> noutput_items*d_itemsize size is alot larger than the UDP payload size >> (1024 bytes). So, UDP gets 4-6K worth of bytes and bursts it all out really >> fast (I can see this behavior in Wireshark), then waits to buffer up >> another 4-6K bytes, and sends it all out really fast. This process then >> continues. Is there a way to smooth this out so that it's not bursting >> bunch of packets all at once? Otherwise the external device isn't able to >> keep up and it's leading to tons of dropped packets. >> >> I tried setting the max output buffer in python but I get this warning >> when I run: gr::log :WARN: flat_flowgraph - Block (endian_swap_impl0) max >> output buffer set to 2048 instead of requested 512. >> >> Any ideas on what I can do to change this behaviour? >> >> Thanks! >> >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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