Hi! Since at least python 2.7 (2011, probably longer, I haven't dug deeper) pkgsrc comes with a patch for Python that disables POSIX semaphore use (pthread_mutex* and pthread_cond* are used instead).
I don't have a small test case yet, but when you build python without the pkgsrc patches and run ./python ../Tools/scripts/run_tests.py test_compileall test_multiprocessing_fork test_concurrent_futures these tests will not finish and I can see lots of pythons in state 'psem' 2791 wiz 77 0 96M 11M psem/31 0:00 0.00% 0.00% python Is anyone aware of problems with semaphores on NetBSD, or has looked at this particular problem before? Thomas
