The problem is that during the build, AVX support was enabled, even though my
processor doesn't support it.
-- Python checking for Cheetah >= 2.0.0
-- Python checking for Cheetah >= 2.0.0 - found
-- Compiler name: GNU
-- x86* CPU detected
-- CPU width is 32 bits, Overruled arch 64
-- Available architectures:
generic;32;3dnow;abm;popcount;mmx;sse;sse2;orc;norc;sse3;ssse3;sse4_a;sse4_1;sse4_2;avx
-- 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
Sincerely,
Tommy James Tracy II
PhD Student
High Performance Low Power Lab
University of Virginia
On Feb 13, 2013, at 2:48 PM, Josh Blum <[email protected]> wrote:
>
>
> On 02/13/2013 01:44 PM, Johnathan Corgan wrote:
>> On Wed, Feb 13, 2013 at 8:25 AM, Tommy Tracy II <[email protected]> wrote:
>>
>>
>>> # 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?
>>>
>>
>> It would be best to find out why libvolk is detecting avx during cmake.
>
> It determines that AVX is supported by the compiler via flags. So,
> support for AVX will be built into the library.
>
> From the output of the volk profile, it doesnt seem that AVX was
> detected. So, all seems well so far...
>
> -josh
>
>> Can you post the rest of the lines from your cmake.out related to volk
>> (should be near the beginning)?
>>
>> Johnathan
>>
>>
>>
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>>
>
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