[pypy-issue] [issue629] "Cannot find gc roots" messages on Linux

klankschap tracker at bugs.pypy.org
Mon Feb 18 18:01:21 CET 2013

klankschap <vm at klankschap.nl> added the comment:

On 18 Feb 2013, at 17:31, Armin Rigo wrote:

> Armin Rigo <armin.rigo at gmail.com> added the comment:
> klankschap: you need to give us more information, ideally a way to reproduce it
> (e.g. the complete script you're running).

As i mentioned, it appears randomly.
No way to reproduce.
It just seems to happen when i have more tasks in the pool then i have processors.
With 4 cores (8 virtual cores) installed:

nrTask = 32

taskSeeds = [random.random() for i in range(nrTask)]
pool = multiprocessing.Pool()
for iid,s in enumerate(taskSeeds):
	arg = ( iid, s, G )
	pool.apply_async(task, args=arg, callback=log_result)

With nrTasks larger then 8 it is more likely to happen.


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