Re: [Discuss-gnuradio] Unhandled exception after upgrading gnuradio- backtrace included

[Ben Reynwar]

On Sat, Mar 10, 2012 at 5:38 AM, Tom Rondeau <address@hidden> wrote:
> On Sat, Mar 10, 2012 at 5:20 AM, MOHD RAFIQ <address@hidden> wrote:
>>
>> Hi,
>> pls suggest fix for this, i have attached my cat /proc/cpuinfo .
>> Thanks
>
>
> I already did. To quote:
>
> "Ok, I have a branch 'volk_32bit_fixes' published at:
> git://github.com/trondeau/gnuradio.git
>
> This should fix the fft_filter issue and another issue in one of the volk
> convert functions (that is not used in GNU Radio but was failing anyway).
>
> I'm still seeing the 32fc_x2_dot_product_32fc failure. It looks like this is
> in the SSE_32 proto-kernel. I'm seeing if we can get a quick fix for it.
> This is the same problem Martin was seeing. If we can't get a fix for it,
> I'm going to temporarily disable it until we get it fixed.
>
> Tom"
>
>
> I have been waiting for people with 32-bit machines to try it out and report
> back before merging it.
>
> Tom
>
I also had this segfault issue.  With the fixed branch, it appears to
work fine again.

>
>>
>> ________________________________
>> From: MOHD RAFIQ <address@hidden>
>> To: "address@hidden" <address@hidden>
>> Sent: Thursday, 8 March 2012 9:45 PM
>> Subject: Re: [Discuss-gnuradio] Unhandled exception after upgrading
>> gnuradio- backtrace included
>>
>>
>> I apologise for not being clear, here is the backtrace
>>
>> [New Thread 0xb21feb70 (LWP 16921)]
>> [Thread 0xb19fdb70 (LWP 16920) exited]
>> [New Thread 0xb19fdb70 (LWP 16922)]
>> [New Thread 0xb29ffb70 (LWP 16923)]
>> [New Thread 0xb33ffb70 (LWP 16924)]
>> [New Thread 0xb3dffb70 (LWP 16925)]
>> [New Thread 0xb51ffb70 (LWP 16926)]
>> [New Thread 0xb47ffb70 (LWP 16927)]
>> [New Thread 0xb11fcb70 (LWP 16928)]
>> [New Thread 0xb09fbb70 (LWP 16929)]
>> [New Thread 0xb01fab70 (LWP 16930)]
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> [Switching to Thread 0xb29ffb70 (LWP 16923)]
>> 0x002fc4a0 in volk_32fc_x2_multiply_32fc_a_sse3 ()
>>    from /usr/local/lib/libvolk.so.0.0.0
>> (gdb) bt
>> #0  0x002fc4a0 in volk_32fc_x2_multiply_32fc_a_sse3 ()
>>    from /usr/local/lib/libvolk.so.0.0.0
>> #1  0x002c25d2 in get_volk_32fc_x2_multiply_32fc_a ()
>>    from /usr/local/lib/libvolk.so.0.0.0
>> #2  0x005125bf in gri_fft_filter_ccc_generic::filter(int,
>> std::complex<float> const*, std::complex<float>*) ()
>>    from /usr/local/lib/libgnuradio-core-3.5.3git.so.0.0.0
>> #3  0x005196ff in gr_fft_filter_ccc::work(int, std::vector<void const*,
>> std::allocator<void const*> >&, std::vector<void*, std::allocator<void*> >&)
>> ()
>>    from /usr/local/lib/libgnuradio-core-3.5.3git.so.0.0.0
>> #4  0x004e537a in gr_sync_decimator::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-3.5.3git.so.0.0.0
>> #5  0x004c983c in gr_block_executor::run_one_iteration() ()
>>    from /usr/local/lib/libgnuradio-core-3.5.3git.so.0.0.0
>> #6  0x004e7a7f in
>> gr_tpb_thread_body::gr_tpb_thread_body(boost::shared_ptr<gr_block>, int) ()
>> from /usr/local/lib/libgnuradio-core-3.5.3git.so.0.0.0
>> #7  0x004e2374 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-3.5.3git.so.0.0.0
>> #8  0x006c8156 in boost::detail::thread_data<boost::function0<void>
>> >::run() ()
>>    from /usr/local/lib/libgruel-3.5.3git.so.0.0.0
>> #9  0x0017444d in thread_proxy () from
>> /usr/lib/libboost_thread-mt.so.1.46.0
>> #10 0x4f94ca2e in start_thread () from /lib/libpthread.so.0
>> #11 0x4f86689e in clone () from /lib/libc.so.6
>>
>> Thanks,
>> rafiq
>>
>>
>> ________________________________
>> From: Tom Rondeau <address@hidden>
>> To: MOHD RAFIQ <address@hidden>
>> Cc: "address@hidden" <address@hidden>
>> Sent: Thursday, 8 March 2012 8:51 PM
>> Subject: Re: [Discuss-gnuradio] Unhandled exception after upgrading
>> gnuradio
>>
>> On Thu, Mar 8, 2012 at 5:40 AM, MOHD RAFIQ <address@hidden>
>> wrote:
>>
>> Hi,
>>    I am using benchmark_tx.py and benchmark_rx.py in code to make WBX
>> usrp2 as transceiver, this was running without error until I upgraded my
>> gnuradio from 3.5.1 to current version
>> v3.5.2-1-g57ad294b, when I run the same code now it gives a segmenatation
>> fault(core dump), below are the /var/log/messages when seg. fault occurs
>>
>> Mar  8 15:29:10 MRAFIQ-NGN kernel: [75426.998302] python[12650] general
>> protection ip:b2d4a0 sp:b51fee80 error:0 in libvolk.so.0.0.0[ae2000+be000]
>> Mar  8 15:29:11 MRAFIQ-NGN abrt[12658]: saved core dump of pid 12635
>> (/usr/bin/python) to
>> /var/spool/abrt/ccpp-2012-03-08-15:29:10-12635.new/coredump (127561728
>> bytes)
>> Mar  8 15:29:11 MRAFIQ-NGN abrtd: Directory
>> 'ccpp-2012-03-08-15:29:10-12635' creation detected
>> Mar  8 15:29:11 MRAFIQ-NGN abrtd: Interpreter crashed, but no packaged
>> script detected: 'python algo-sink.py'
>> Mar  8 15:29:11 MRAFIQ-NGN abrtd: Corrupted or bad dump
>> /var/spool/abrt/ccpp-2012-03-08-15:29:10-12635 (res:2), deleting
>>
>> In the code this occurs at tb.start() inside benchmark_rx.py
>>
>> and it works without an error after a 6-8 trials in a row ,
>> I am not able to figure out where there is exception that is not handled
>> properly, I appreciate your comments.
>>
>> fedora 15, gnuradio v3.5.2-1-g57ad294b,
>> usrp2, WBX daughter board
>>
>>
>>
>> Can you follow the instructions here:
>>
>> http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-do-I-debug-GNU-Radio-in-Python
>>
>> And get us a backtrace (bt in gdb) when the seg fault happens? It'll help
>> us to debug it.
>>
>> Thanks,
>> Tom
>>
>>
>>
>>
>>
>>
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>>
>
>
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