reference count problems
Mathew Yeates
myeates at jpl.nasa.gov
Wed Nov 15 15:45:58 EST 2006
Robert Kern wrote:
> Mathew Yeates wrote:
>
>> Hi
>> I'm running a 64 bit Python 2.5 on an x86 with Solaris. I have a
>> function I call over 2^32 times and eventually I run out of memory.
>>
>> The function is
>> def make_B(deltadates):
>> numcols=deltadates.shape[0]
>> B=numpy.zeros((numcols,numcols))
>> for ind in range(0,numcols): #comment out this loop and all is good
>> B[ind,0:numcols] = deltadates[0:numcols]
>> return B
>>
>>
>> If I comment out the loop lines, my memory is okay. I'm guessing that a
>> reference is being added to "deltadates" and that the reference count is
>> going above 2^32 and reseting. Anybody have any ideas about how I can
>> cure this? Is Numpy increasing the reference count here?
>>
>
> Can you give us a small but complete and self-contained script that demonstrates
> the problem?
>
>
I'll try. But its in a complex program. BTW - I tried
B[ind,0:numcols] = deltadates[0:numcols].copy()
but that didn't work either.
Mathew
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