[Numpy-discussion] Video meeting this week

Olivier Grisel olivier.grisel at ensta.org
Fri Jul 10 12:42:13 EDT 2015

2015-07-10 18:31 GMT+02:00 Nathaniel Smith <njs at pobox.com>:
> On Jul 10, 2015 10:51 AM, "Olivier Grisel" <olivier.grisel at ensta.org> wrote:
>> I narrowed down the segfault from the scipy tests on my machine to:
>> OPENBLAS_CORETYPE='Barcelona' /c/Python34_x64/python -c"import numpy
>> as np; print(np.linalg.svd(np.ones((129, 129), dtype=np.float64))"
>> Barcelona is the architecture detected by OpenBLAS. If I force Nehalem
>> or if I reduce the matrix to shape (128, 128), it no longer segfaults.
>> To debug it further I think I have to write a test program in C that
>> uses the sgesdd function of the libopenblaspy.dll or against the
>> official libopenblas.dll. Setting the dev environment under windows is
>> painful though.
> I assume you've already checked that this is a Windows specific issue?

I am starting a rackspace VM with linux to check. Hopefully it will
also be detected as Barcelona by openblas.

On my laptop I have a Sandybridge coretype (I just checked).

http://twitter.com/ogrisel - http://github.com/ogrisel

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