I think "processing more samples" should be prohibited because the length of each buffer is limited. Use "set_output_multiple()" function to keep noutput_items equal to N*output_multiple (N is a positive integer). https://www.gnuradio.org/doc/doxygen/classgr_1_1block.html#a63d67fd758b70c6f2d7b7d4edcec53b3
Perkins, Daniel (US) <perki...@battelle.org> 于2022年6月29日周三 00:47写道： > I have written a source block that reads an IQ data stream from a socket. > > It is my understanding that: > > - the work function should attempt to process the number of samples as > determined by the noutput_items variable > - processing fewer samples is acceptable > - processing more samples is not recommended > > > > My socket packets contain a fixed number of samples so to avoid an extra > memory transfer, I prefer to copy straight from the socket buffer directly > to the output buffer with a volk function. To make this work, I need to > return that number (1024) of samples from the work function which sometimes > violates the “processing more samples” rule. However, this seems to work > without any issues and only the occasional dropped UDP frame. I can also > manipulate what GNU Radio will assign to noutput_items by calling > set_min_noutput_items. When I set the min nouput_items to the size of my > payload, I get a bunch of underruns. What is the optimal way to deal with > this? >
