Nikos, Thanks for the reply. I traced it to the “recv” call which has left me puzzled. I added a bunch of instrumentation to see if I was walking off the end of my memory that was allocated to the 16-bit I/Q buffer.
`const std::int32_t startIndex = 2*num_accum_samps;` `const std::int32_t remainingSize = 2*sampleLength-(2*num_accum_samps);` `std::cout << "iq[" << startIndex << "] = " << iq[startIndex];` `std::cout << "\t" << remainingSize;` `std::cout << "\t" << startIndex + remainingSize;` `std::cout << "\t" << bufferSize << std::endl;` `num_accum_samps += rx_stream->recv(&iq[startIndex], remainingSize, meta, 5.0, true);` And I can get it to faithfully crash every single time when I don’t pad my array of 16-bit integers by an additional 2165 int16s. I included some output indicating where I’ve specified as the start of the buffer for it to write to, followed by the remaining size, followed by the sum of the two just to make sure I can math, and finally the actual reserved buffer size plus the pad of 2164 int16s. `…` `iq[1180480] = 0 19520 1200000 1202164` `iq[1185920] = 0 14080 1200000 1202164` `iq[1191360] = 0 8640 1200000 1202164` `iq[1196800] = 0 3200 1200000 1202164` `Segmentation fault (core dumped)` If you’ll notice, I’ve specified for it to start at index 1196800 and that the number of samples per buffer being passed to recv() is 3200. I think I’m just being dense / misinterpreting the *nsamps_per_buff* (the second parameter of the “recv” call) because it seems as if it is not respecting the remaining buffer size that I am specifying and attempting to write beyond the bounds of the memory I’ve allocated for the buffer. Is there some alignment or minimum buffer size that I’m not aware of? Thanks, Chris
_______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
