On Sun, Feb 08, 2009 at 05:56:43PM +0000, Garth N. Wells wrote: > > > mspieg wrote: > > > > On Feb 6, 2009, at 6:35 PM, Garth N. Wells wrote: > > > >> > >> > >> mspieg wrote: > >>> Hi All, > >>> I'm playing with some characteristic based advection schemes in > >>> Dolfin (0.9.0) which require a large number of discrete Function > >>> evals. This seems to be leading to a large memory leak as the > >>> process grows considerably in size with every time-step. I've put > >>> together a small (badly written) program that demonstrates the > >>> problem which I've tried to isolate just to IntersectionDetector (and > >>> the underlying GTS). I suspect the problem is in GTS, but thought I > >>> would start with Dolfin support. Any thoughts/help greatly > >>> appreciated... > >> > >> I recall that quite some time ago some memory leaks were fixed in the > >> DOLFIN GTS interface, but there remained some GTS problems. Have you > >> run valgrind? > > > > Thanks Garth, > > I've been developing on mac OSX 10.4 which valgrind doesn't support > > (yet ?). I can probably dig up a linux box and run valgrind (but if > > someone else can do it faster that would be great). Apple has an > > application MallocDebug, which I've started playing with, but it seems > > to be choking on some of the libraries. I'll let you know if I make any > > progress. If anyone else has some insight or can easily run valgrind on > > this code (assuming that it develops the same memory issues under Linux > > as MacOSX), that would be great. > > > > I think that I've fixed the leak (using top to view the memory use, it > now remains constant). I ran valgrind on the original code and it didn't > pick anything up but there was definitely a leak. GTS has an odd > interface which I would say contributed to the DOLFIN-side leak. > > Garth
Nice. I was just about to look into it. Yes, the interface is a bit strange. While we're at it, I'm not sure the destructor is correct. I tried to figure out how to do it correctly and came up with gts_bb_tree_destroy(tree, true); The other option would be gts_bb_tree_destroy(tree, false); -- Anders
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