[gecode-users] Propagator

[Jan Kelbel]

Hi, finally I found the bug:
in the copy constructor of my propagator, I called SharedArray(int n) 
constructor, that allocated each time new memory. I did it only in the 
version inherited from NaryPropagator class, which is the reason why the 
other version was OK.

Cheers, Jan

Jan Kelbel wrote:
> Hello,
> 
> some months ago I implemented N-ary propagator (it is that edge-finder). 
> When I used it to solve larger problem instances, I noticed that it 
> consumes memory in rate of about 1MB/s.
> I tested it in Gecode 2.2.0 (where it was even about 3MB/s) and in 
> Gecode 3.1.0., using MS Visual C++ 2008.
> 
> This propagator is inherited from class NaryPropagator. In the propagate 
> method, there is an array for sorting, which is created using the Region 
> allocation.
> 
> When I changed the edge-finder to inherit directly from the class 
> Propagator, the growing memory consumption disappeared.
> 
> My question is, are there some rules, what should be implemented in 
> propagator inherited from NaryPropagator in order allocate/dealocate 
> memory correctly?
> 

> Thank you.
> 
> Regards, Jan