[Cython] Refcount nanny status

[Michael Abshoff]

Robert Bradshaw wrote:
> On Jan 8, 2009, at 5:01 PM, Michael Abshoff wrote:


<SNIP>

Hi Robert,

>> Well, I don't get very far:
>>
>> AttributeError: 'CoerceToTempNode' object has no attribute 'old_temp'
>> Traceback (most recent call last):
> 
> [...]
> 
>> line 666, in release_temp_result
>>      if self.old_temp:
>> AttributeError: 'CoerceToTempNode' object has no attribute 'old_temp'
>>
>> This is head of 0.11-devel and I made sure the old Cython was removed.
> 
> :(
> 

If someone fixes this I will get right back to testing. I will see what 
is going on, maybe this is fixable for me in which case it should be 
trivial :)

<SNIP>

 >
 > As a regression tool, I would be happy if the memory increase
 > remained the same with the old and new Cython (or, e.g., between runs
 > of Sage). At least it could probably pinpoint egregious issues. I bet
 > twice is enough for 90+% of the code out there.
 >

Well, the main issue for me here is to hunt down the small root causes 
if leaks since I can find plenty of large scope examples that go nuts. 
But all the low hanging fruits in the C heap, i.e. sparse linear algebra 
have been fixed, so now the issues are also with Cython/Python and I 
don't know enough about this yet to make headway on my own. Obviously 
that ought to change over time, especially when I get some nice tools 
like the reference count nanny.

>>
>> And valgrind offers other fun tools like exp-omega, exp-ptrcheck  
>> and so
>> on :)
> 
> Yes, I was commenting on the fact that we don't worry about  
> performance loss in these cases.

Yep, I agree 100%.

> - Robert
> 

Cheers,

Michael

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