On 02/13/2013 12:17 PM, Tommy Tracy II wrote:
Nick, thank you. I was wondering why AVX showed up in the list if the
processor didn't support it.
Does anyone have any ideas why rotatorpupper would take so long?
I don't, but I'm not that worried about it as the generic implementation
is only there for backup when the hardware doesn't support the more
effective SIMD version. Generic implementation times can vary hugely
dependent on which version of GCC you're using, what optimization flags
were enabled, etc. And sometimes GCC just optimizes really, really terribly.
The segfault is a different story. Like Josh suggests a backtrace would
be helpful to see exactly what went wrong.
--n
Sincerely,
Tommy James Tracy II
PhD Student
High Performance Low Power Lab
University of Virginia
On Feb 13, 2013, at 2:57 PM, Nick Foster <n...@ettus.com
<mailto:n...@ettus.com>> wrote:
On 02/13/2013 08:25 AM, Tommy Tracy II wrote:
Thank you. I think this may be the problem:
# grep "Available architectures" cmake.out
-- Available architectures:
generic;32;3dnow;abm;popcount;mmx;sse;sse2;orc;norc;sse3;ssse3;sse4_a;sse4_1;sse4_2;avx
# grep "Available machines" cmake.out
-- Available machines:
generic_orc;sse2_32_mmx_orc;sse3_32_orc;ssse3_32_orc;sse4_a_32_orc;sse4_1_32_orc;sse4_2_32_orc;avx_32_mmx_orc
/proc/cpuinfo flags:
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi *mmx* fxsr *sse* *sse2* ss ht tm pbe
syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good
nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor
ds_cpl vmx smx est tm2 *ssse3 *cx16 xtpr pdcm *sse4_1* *sse4_2*
popcnt aes lahf_lm arat dts tpr_shadow vnmi flexpriority ept void
It looks like my processor does not support avx, but Gnuradio
assumes it does. Is there a way to disable avx?
No, your processor doesn't support AVX. Your compiler, however, does.
Volk looks once at compile time to build all architectures your
compiler supports, and then looks again at runtime to enable only
instructions your CPU can support. If you look at volk_profile's
output again, you'll see that it's not trying to use a volk_machine
with AVX support:
Using Volk machine: sse4_2_32_orc
I haven't tried using volk_profile on a 32-bit OS but I suspect that
has something to do with your incredibly long rotatorpuppet test. =)
--n
Sincerely,
Tommy James Tracy II
PhD Student
High Performance Low Power Lab
University of Virginia
On Feb 12, 2013, at 10:27 AM, Johnathan Corgan
<johnat...@corganlabs.com <mailto:johnat...@corganlabs.com>> wrote:
Available architectures:
generic;64;3dnow;abm;popcount;mmx;sse;sse2;orc;norc;sse3;ssse3;sse4_a;sse4_1;sse4_2;avx
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