Re: [Discuss-gnuradio] I thought we had squashed this one

[Marcus D. Leech]

>
> On Tue, Jun 5, 2012 at 11:45 PM, Marcus D. Leech <address@hidden> wrote:
>   
>> Got a core dump this evening from this evenings GIT build.  On a Fedora
>> 12 machine (I know, horbly obsolete),
>>  on a Centrino M CPU:
>>     
> We did squash this bug. Why you gotta keep bringing up the past?
>
> What version of FFTW is on that machine? The block should be calling
> into fftw_malloc to get aligned arrays for the taps and the in/out
> buffers are from the fftw object, anyways, so they are aligned. So
> there's nothing that should be producing anything unaligned unless
> FFTW isn't working like I think it should be working.
>
> Tom
>
>   
FFTW is: fftw-3.2.2-1.fc12.i686


It's a 32-bit machine--if that makes a difference on the alignment.

>
>   
>> #0  0x003bb409 in volk_32fc_x2_multiply_32fc_a_sse3 ()
>>   from /usr/local/lib/libvolk.so.0.0.0
>> #1  0x00396415 in get_volk_32fc_x2_multiply_32fc_a ()
>>   from /usr/local/lib/libvolk.so.0.0.0
>> #2  0x0096b7e7 in gri_fft_filter_ccc_generic::filter(int,
>> std::complex<float> const*, std::complex<float>*) ()
>>   from /usr/local/lib/libgnuradio-core-3.6.1git.so.0.0.0
>> #3  0x00972a5b 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-3.6.1git.so.0.0.0
>> #4  0x00942187 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-3.6.1git.so.0.0.0
>> #5  0x00929455 in gr_block_executor::run_one_iteration() ()
>>   from /usr/local/lib/libgnuradio-core-3.6.1git.so.0.0.0
>> #6  0x00944bb3 in
>> gr_tpb_thread_body::gr_tpb_thread_body(boost::shared_ptr<gr_block>, int)
>> () from /usr/local/lib/libgnuradio-core-3.6.1git.so.0.0.0
>> #7  0x0093eecc 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-3.6.1git.so.0.0.0
>> #8  0x0031084c in boost::function0<void>::operator()() const ()
>>   from /usr/local/lib/libgruel-3.6.1git.so.0.0.0
>>
>> Here's /proc/cpuinfo
>>
>> processor    : 0
>> vendor_id    : GenuineIntel
>> cpu family    : 6
>> model        : 14
>> model name    : Genuine Intel(R) CPU           T2400  @ 1.83GHz
>> stepping    : 8
>> cpu MHz        : 1833.000
>> cache size    : 2048 KB
>> physical id    : 0
>> siblings    : 2
>> core id        : 0
>> cpu cores    : 2
>> apicid        : 0
>> initial apicid    : 0
>> fdiv_bug    : no
>> hlt_bug        : no
>> f00f_bug    : no
>> coma_bug    : no
>> fpu        : yes
>> fpu_exception    : yes
>> cpuid level    : 10
>> wp        : yes
>> flags        : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
>> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc
>> arch_perfmon bts aperfmperf pni monitor vmx est tm2 xtpr pdcm
>> bogomips    : 3657.43
>> clflush size    : 64
>> cache_alignment    : 64
>> address sizes    : 32 bits physical, 32 bits virtual
>> power management:
>>
>> processor    : 1
>> vendor_id    : GenuineIntel
>> cpu family    : 6
>> model        : 14
>> model name    : Genuine Intel(R) CPU           T2400  @ 1.83GHz
>> stepping    : 8
>> cpu MHz        : 1833.000
>> cache size    : 2048 KB
>> physical id    : 0
>> siblings    : 2
>> core id        : 1
>> cpu cores    : 2
>> apicid        : 1
>> initial apicid    : 1
>> fdiv_bug    : no
>> hlt_bug        : no
>> f00f_bug    : no
>> coma_bug    : no
>> fpu        : yes
>> fpu_exception    : yes
>> cpuid level    : 10
>> wp        : yes
>> flags        : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
>> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc
>> arch_perfmon bts aperfmperf pni monitor vmx est tm2 xtpr pdcm
>> bogomips    : 3657.52
>> clflush size    : 64
>> cache_alignment    : 64
>> address sizes    : 32 bits physical, 32 bits virtual
>> power management:
>>
>>
>> Seems to have been provoked by replacing a regular FIR filter with an
>> FFT filter (or rather, replacing
>>  3 FIR filters with 3 FFT filters with the same "shape" as the FIR
>> filters).
>>
>> Curiously enough, on Ubuntu 12.04 on *exactly the same hardware*, I
>> don't have this problem, even
>>  with this evening's build.
>>
>>
>>
>> --
>> Principal Investigator
>> Shirleys Bay Radio Astronomy Consortium
>> http://www.sbrac.org
>>
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>     
>
>   


-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org