I think you'd want to set that on the UDP sink itself.
On 03/04/2018 01:30 PM, Firdavs Pulat wrote:
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!
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On Sun, Mar 4, 2018 at 6:44 AM, Jeff Long <willco...@gmail.com
<mailto: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!
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