Re: [Discuss-gnuradio] Trouble with gnuradio and AMD32

[Josh Blum]

On 06/05/2012 04:29 PM, Tom Rondeau wrote:
> On Tue, Jun 5, 2012 at 1:49 PM, Josh Blum <address@hidden> wrote:
>>
>>
>> On 06/05/2012 09:39 AM, Josh Blum wrote:
>>>
>>>>> My problem is like this:
>>>>> http://lists.gnu.org/archive/html/discuss-gnuradio/2012-03/msg00294.html
>>>>> Then i run volk_profile, and got this errors:
>>>>>
>>>>> Using Volk machine: generic
>>>
>>> Looks like volk isnt detecting your machine right... hmmm curious.
>>
>> All, we dont have an sse machine generated since there are no sse only
>> kernels. So that should be expected.
>>
>>>
>>>>>>> gr_fir_ccc: using 3DNow!Ext
>>>> Using Volk machine: generic
>>>> terminate called after throwing an instance of 'std::invalid_argument'
>>>>   what():  gr_block::volk_get_alignment
>>>> Aborted
>>>
>>
>> so volk_get_alignment() should be returning 1. Would that be a problem
>> for volk_get_alignment in this particular block, Tom?
>>
>> -josh
> 
> Yep, it would cause this problem. That block uses VOLK, so it will try
> to set the alignment property for the scheduler, which calls
> set_alignment. That function checks to see if the multiple is less
> than 1 and throws a: "throw std::invalid_argument
> ("gr_block::set_alignment_multiple");"
> 
> So yeah, with VOLK not handling that processor correctly, it looks
> like it can't get the alignment right, either.
> 
> Would patching VOLK to return a minimum of 1 work, or is that just
> masking a larger issue for these older processors?
> 

volk is fine, but this gives a 0
volk_get_alignment() / sizeof(gr_complex)
needs some std::max somewhere