On 03/07/2013 01:34 PM, ikjtel wrote: > Okay, so was in zombie mode when I typed the command, but certainly was not > expecting to get a segmentation fault. > > > The failing command was > /usr/bin/python /usr/local/bin/uhd_fft --spec 'A:0 B:0' -f 924e6 > > Things worked fine with --spec 'A:0'. Below is the seg fault, reported in > case there's anything serious behind it... > > This is from uhd git as of Feb. 2.usrp3_b200_fix >
The uhd fft only displays one channel. You will have to keep the frontend specification to a single frontend for this app. It looks like error checking didnt catch this, but there is a mismatch in the number of source outputs for the gnuradio block and the number of channels setup on the frontend. Something was off by a factor of two, and bad memory was accessed. -josh > Best > > Max > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Core was generated by `/usr/bin/python /usr/local/bin/uhd_fft --spec A:0 B:0 > -f 924e6'. > Program terminated with signal 11, Segmentation fault. > #0 0x00007f43783f3276 in > __convert_sc16_item16_usrp1_1_fc32_2_PRIORITY_GENERAL::operator()(uhd::ref_vector<void > const*> const&, uhd::ref_vector<void*> const&, unsigned long) () from > /usr/local/lib/libuhd.so.003 > > (gdb) i stack > #0 0x00007f43783f3276 in > __convert_sc16_item16_usrp1_1_fc32_2_PRIORITY_GENERAL::operator()(uhd::ref_vector<void > const*> const&, uhd::ref_vector<void*> const&, unsigned long) () from > /usr/local/lib/libuhd.so.003 > #1 0x00007f43785ac2ac in > usrp1_recv_packet_streamer::recv(uhd::ref_vector<void*> const&, unsigned > long, uhd::rx_metadata_t&, double, bool) () from /usr/local/lib/libuhd.so.003 > #2 0x00007f43789c1718 in uhd_usrp_source_impl::work(int, std::vector<void > const*, std::allocator<void const*> >&, std::vector<void*, > std::allocator<void*> >&) () from > /usr/local/lib/libgnuradio-uhd-3.6.3git.so.0.0.0 > #3 0x00007f437e846754 in gr_sync_block::general_work(int, std::vector<int, > std::allocator<int> >&, std::vector<void const*, std::allocator<void const*> > >&, std::vector<void*, std::allocator<void*> >&) () from > /usr/local/lib/libgnuradio-core-3.6.3git.so.0.0.0 > #4 0x00007f437e8284d6 in gr_block_executor::run_one_iteration() () from > /usr/local/lib/libgnuradio-core-3.6.3git.so.0.0.0 > #5 0x00007f437e849bf4 in > gr_tpb_thread_body::gr_tpb_thread_body(boost::shared_ptr<gr_block>, int) () > from /usr/local/lib/libgnuradio-core-3.6.3git.so.0.0.0 > #6 0x00007f437e84319f in > boost::detail::function::void_function_obj_invoker0<gruel::thread_body_wrapper<tpb_container>, > void>::invoke(boost::detail::function::function_buffer&) () from > /usr/local/lib/libgnuradio-core-3.6.3git.so.0.0.0 > #7 0x00007f437e5782a5 in boost::detail::thread_data<boost::function0<void> > >::run() () from /usr/local/lib/libgruel-3.6.3git.so.0.0.0 > #8 0x00007f437dab2230 in thread_proxy () from > /usr/lib/libboost_thread.so.1.42.0 > #9 0x00007f43809ff971 in start_thread () from /lib/libpthread.so.0 > #10 0x00007f437f8db92d in clone () from /lib/libc.so.6 > #11 0x0000000000000000 in ?? () > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
