[Numpy-discussion] interrupting large matrix operations
Fri Sep 10 07:22:03 CDT 2010
On Fri, Sep 10, 2010 at 9:05 PM, Tom K. <firstname.lastname@example.org> wrote:
> OK, I know it's my problem if I try to form a 15000x15000 array and take the
> cosine of each element, but the result is that my python session completely
> hangs - that is, the operation is not interruptible.
> <hangs indefinitely>
> I'd like to hit "control-c" and get out of this hung state.
> What would it take to support this?
It is difficult to support this in every case. The basic way to handle
ctr+c is to regularly check whether the corresponding signal has been
sent during computation. The problem is when to check this - too
often, and it can significantly slow down the processing.
For ufuncs, I am a bit surprised it is not done until the end of the
processing, though. What happens exactly when you do Ctrl+C ? It may
take a long time, but it should raise a keyboard interrupt at the end
(or after the intermediate computation t-t.T which may take quite some
> (I'm running ancient numpy and python at work, so if this is already
> supported in later versions, my apologies)
What does ancient mean ? Could you give us the version (numpy.__version__)
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