Thanks for your answer. I tried to use benchmark_rate, and I don’t have any sample loss at 200MS/s.
On GnuRadio with a very simple flowgraph (USRP Source -> Null Sink) I still have very regular (every few seconds) overflows. In both cases, the CPU load of each core never goes over \~25%. Is there any particular performance tips to know on GnuRadio (e.g. playing with the min/max output buffer sizes of the blocks) to optimize the throughput?
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