Re: [Discuss-gnuradio] seg fault in volk_32f_s32f_multiply_32f_a_sse gnuradio v 3.6.1

[ikjtel]

> The reason this doesn't cause a problem for you in 3.3 is because
> that's pre-Volk. This looks like you're running SSE operations on a
> system that doesn't support it.

Hi Tom
I shall put together the full list of stuff you mentioned, but 3 quick things
 
1) the system apparently does support SSE (see below) 
2) we have a few custom C++ blocks in the app, perhaps there's some rule we're 
breaking and so running afoul of the SSE instruction operand alignment 
restrictions (is this possible?)
3) the problem is happening in a relatively complex GR app 
[http://op25.osmocom.org/wiki/wiki/SignalScopePage , using audio-IF mode].

Both 2 and 3 point toward the need to try to reproduce the problem here with a 
simplified test app, finding the absolute minimum number of GR blocks needed to 
do so, and ruling out the possibility that's it's something we're doing wrong...

Thanks

Max
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~processor
    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 28
model name    : Intel(R) Atom(TM) CPU N450   @ 1.66GHz
stepping    : 10
cpu MHz        : 1000.000
cache size    : 512 KB
physical id    : 0
siblings    : 2
core id        : 0
cpu cores    : 1
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 pat 
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon 
pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm 
movbe lahf_lm dts
bogomips    : 3333.52
clflush size    : 64
cache_alignment    : 64
address sizes    : 32 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 28
model name    : Intel(R) Atom(TM) CPU N450   @ 1.66GHz
stepping    : 10
cpu MHz        : 1000.000
cache size    : 512 KB
physical id    : 0
siblings    : 2
core id        : 0
cpu cores    : 1
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 pat 
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon 
pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm 
movbe lahf_lm dts
bogomips    : 3332.92
clflush size    : 64
cache_alignment    : 64
address sizes    : 32 bits physical, 48 bits virtual
power management: