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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 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
< address@hidden>
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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