[SciPy-user] optimize.leastsq crashs my interpreter

[Ed Schofield]

On 14/07/2006, at 9:06 PM, weg werp wrote:

> Hi group,
>
> I can confirm some problems with an Athlon 1700+ processor. I just
> downloaded and installed the latest enthought version
> (enthon-python2.4-1.0.0.beta4)
>
> If you then do:
> import numpy
> numpy.test(10,10)
>
> you get:
> ...lots of test results...
> check_matmat (numpy.core.tests.test_numeric.test_dot) ... ok
> check_matscalar (numpy.core.tests.test_numeric.test_dot) ... ok
> check_matvec (numpy.core.tests.test_numeric.test_dot)
> <crash>


Thanks to all who have posted information about this.  It looks like  
NumPy is built against an ATLAS library that uses SSE2 instructions,  
and that Athlons don't support these.

I'm working with Travis to iron this out with the next NumPy release  
(probably 1.0beta1).  In the meantime, if you need to use NumPy /  
SciPy on an Athlon, you'll need to build your own NumPy binary using  
the instructions at http://new.scipy.org/Wiki/Installing_SciPy.   
Building SciPy too shouldn't be necessary, but I can't be sure.  To  
simplify the build, I'd recommend using Pearu's ATLAS libraries built  
for Pentium 2.  They were available on old.scipy.org, but it seems  
this is no longer accessible.  I'll upload my local copy to the wiki  
in the next few days.

-- Ed