Re: udp source - too much data warning message

[Marcus Müller]

Hey Jorge,

just to avoid duplicating effort on the mailing list, and to document it for future search 
engine users, we discussed that yesterday on chat:

jofegoor
> Hi all, I have a problem with the UDP sink and UDP soruce blocks, i am working on a 
USRP > E312 and i made a copy of a .wav file and a python script on the USRP, 
the script is
> from the GRC 3.8 and it is only a wav file source block and the UDP sink block, 
> in
> another flowgraph i have the correspondent UDP source and the audio sink, but a 
> cant
> hear the file just like a instant and then noise, when a run the host part of 
> the test i
> get this error:
> gr::log :WARN: udp_source0 - Too much data; dropping packet.
> what can i do?? i did a quick google search and all i could find was that i 
> have to
> modify the dp_source_impl.cc file, but i dont even know where that file is
funkylab
> your UDP source is pushing out data as fast as it can through the network
> which is much much faster than your soundcard consumes the samples, jofegoor
> that means the network packets arrive at the UDP sink and that sink has nowhere 
> to put
> them
> which means they get dropped.
> So, long story short, UDP is the wrong protocol here, you need flow control. 
> Try the
> ZeroMQ request/reply pair of blocks, with the request on the "receiving" end 
> and the
> reply on the transmitting end.
jofegoor
> i see, i'm gonna try this, thanks you for your time :)

Cheers,
Marcus
On 26.04.23 20:20, JORGE GONZALEZ ORELLANA via GNU Radio, the Free & Open-Source Toolkit 
for Software Radio wrote:
> Hi all, I have a problem with the UDP sink and UDP source blocks, i am working on a USRP 
> E312 and i made a copy of a .wav file and a python script on the USRP, the script is 
> from the GRC 3.8 and it is only a wav file source block and the UDP sink block, in 
> another flowgraph i have the correspondent UDP source and the audio sink, but i can't 
> hear the file just like a instant and then noise, when i run the host part of the test i 
> get this error:
> gr::log :WARN: udp_source0 - Too much data; dropping packet.
>
> <https://matrix.to/#/!PiiKkGTcBDLmPnxhoT:gnuradio.org/$tjRUpZbSBqdBSVt4j7pZ6YdDnpl1QRqhynkr1lK4g48?via=gnuradio.org&via=libera.chat&via=matrix.org>
> What can I do?? i did a quick google search and all i could find was that i have to 
> modify the dp_source_impl.cc <http://impl.cc> file, but i don't even know where that file is