I'm trying to track down a memory leak in a fairly large code. It uses a lot
numpy, and a bit of c++-wrapped code. I don't yet know if the leak is purely
python or is caused by the c++ modules.
At each iteration of the main loop, I call gc.collect()
If I then look at gc.garbage, it is empty.
I've tried using objgraph. I don't know how to interpret the result. I don't
know if this is the main leakage, but I see that each iteration there are more
'Burst' objects. If I look at backrefs to them using this code:
for frame in count(1): ## main loop starts here
objs = objgraph.by_type('Burst')
if len (objs) != 0:
print(objs, gc.is_tracked (objs))
objgraph.show_backrefs(objs, max_depth=10, refcounts=True)
I will get a graph like that attached
A couple of strange things.
The refcounts (9) of the Burst object don't match the number of arrows into it.
There are 2 lists with 0 refs. Why weren't they collected?