Sorry that I forgot to run "bt" yesterday. Here is the output of bt.
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address@hidden:narrowband$ gdb python
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <
http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<
http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /usr/bin/python...(no debugging symbols found)...done.
(gdb) run benchmark_rx.py -f 900M -m bpsk -r 1M --rx-gain=25
Starting program: /usr/bin/python benchmark_rx.py -f 900M -m bpsk -r 1M --rx-gain=25
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.006.002-1-g9fd308b3
Using Volk machine: avx_64_mmx_orc
[New Thread 0x7fffe979f700 (LWP 2944)]
[Thread 0x7fffe979f700 (LWP 2944) exited]
[New Thread 0x7fffe979f700 (LWP 2945)]
[Thread 0x7fffe979f700 (LWP 2945) exited]
[New Thread 0x7fffe979f700 (LWP 2946)]
[Thread 0x7fffe979f700 (LWP 2946) exited]
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
[New Thread 0x7fffe979f700 (LWP 2947)]
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The send buffer could not be resized sufficiently.
Target sock buff size: 1048576 bytes.
Actual sock buff size: 1000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.wmem_max=1048576
[New Thread 0x7fffe8d91700 (LWP 2948)]
UHD Warning:
Unable to set the thread priority. Performance may be negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam
[New Thread 0x7fffe3fff700 (LWP 2949)]
Warning: Failed to enable realtime scheduling.
[New Thread 0x7fffe37fe700 (LWP 2950)]
[New Thread 0x7fffe2ffd700 (LWP 2951)]
[New Thread 0x7fffe27fc700 (LWP 2952)]
[New Thread 0x7fffe1ffb700 (LWP 2953)]
[New Thread 0x7fffe17fa700 (LWP 2954)]
[New Thread 0x7fffe0ff9700 (LWP 2955)]
[New Thread 0x7fffbffff700 (LWP 2956)]
[New Thread 0x7fffb7fff700 (LWP 2957)]
[New Thread 0x7fffbf7fe700 (LWP 2958)]
[New Thread 0x7fffbeffd700 (LWP 2959)]
[New Thread 0x7fffbe7fc700 (LWP 2960)]
[New Thread 0x7fffbdffb700 (LWP 2961)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffe0ff9700 (LWP 2955)]
0x00007ffff46534b7 in volk_32fc_32f_dot_prod_32fc_a_sse ()
from /usr/local/lib/libvolk.so.0.0.0
(gdb) bt
#0 0x00007ffff46534b7 in volk_32fc_32f_dot_prod_32fc_a_sse ()
from /usr/local/lib/libvolk.so.0.0.0
#1 0x00007fffedac8c18 in gr::filter::kernel::fir_filter_ccf::filter(std::complex<float> const*) () from /usr/local/lib/libgnuradio-filter-3.7.3git.so.0.0.0
#2 0x00007fffee0687b0 in gr::digital::pfb_clock_sync_ccf_impl::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-digital-3.7.3git.so.0.0.0
#3 0x00007ffff5232053 in gr::block_executor::run_one_iteration() ()
from /usr/local/lib/libgnuradio-runtime-3.7.3git.so.0.0.0
#4 0x00007ffff5274aa3 in gr::tpb_thread_body::tpb_thread_body(boost::shared_ptr<gr::block>, int) () from /usr/local/lib/libgnuradio-runtime-3.7.3git.so.0.0.0
#5 0x00007ffff5266be6 in boost::detail::function::void_function_obj_invoker0<gr::thread::thread_body_wrapper<gr::tpb_container>, void>::invoke(boost::detail::function::function_buffer&) () from /usr/local/lib/libgnuradio-runtime-3.7.3git.so.0.0.0
#6 0x00007ffff521fbae in boost::detail::thread_data<boost::function0<void> >::run()
() from /usr/local/lib/libgnuradio-runtime-3.7.3git.so.0.0.0
#7 0x00007ffff48d7da9 in ?? () from /usr/lib/libboost_thread.so.1.48.0
#8 0x00007ffff7bc4e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9 0x00007ffff699e3fd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#10 0x0000000000000000 in ?? ()
(gdb)
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