[Numpy-discussion] Long-standing issue with using numpy in embedded CPython
aron at ahmadia.net
Tue Sep 25 07:10:10 EDT 2012
Can you expand a bit? Are you trying to disable threads at
compile-time or at run-time? Which threaded functionality are you
trying to disable? Are you using numpy as a computational library
with multiple threads making calls into its functions? I think
NPY_ALLOW_THREADS is for interacting with the GIL, but I have not
played with it much.
On Mon, Sep 24, 2012 at 6:54 PM, Raphael de Feraudy <feraudy at phimeca.com> wrote:
> Yang Zhang <yanghatespam <at> gmail.com> writes:
>> > I'm curious how to disable threads in numpy (not an ideal solution).
>> > Googling seems to point me to setting NPY_ALLOW_THREADS to
>> > 0....somewhere.
> It's appearing to me I had to face this very issue,
> which I reported @Numpy TRAC : http://projects.scipy.org/numpy/ticket/2213.
> I just tried your suggestion :
> set NPY_ALLOW_THREADS to 0 in numpy/core/include/numpy/ndarraytypes.h.
> It allowed my atomic example to run without stalling,
> and also fixed the issue in my application.
> Though i'm not entirely satisfied by this workaround,
> which might slow down heavy computations.
> I also find it too intrusive in numpy source code
> and don't wish to maintain a powerless numpy fork.
> Has anyone else settled with this fix ?
> Or may anybody have any other suggestion / comments ?
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