> Can you please test interrupt_lock_acquire.py? It should be the same than the unit test, but in a fresh Python process.

Thanks for your response, this is what I have:

$ PYTHONPATH=. ./python ./interrupt_lock_acquire.py 
Traceback (most recent call last):
  File "./interrupt_lock_acquire.py", line 30, in <module>
    raise Exception("dt > 3: dt=%s" % dt)
Exception: dt > 3: dt=5.011708974838257

Remi.