[Numpy-discussion] Video meeting this week

Carl Kleffner cmkleffner at gmail.com
Fri Jul 10 14:20:01 EDT 2015


I could provide you with a debug build of libopenblaspy.dll. The segfault -
if ithrown from openblas - could be detected with gdb or with the help of
backtrace.dll.

Carl

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?
>
> -n
>
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