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# https://github.com/unbit/uwsgi/pull/2615
# CPU heavy application in multi threaded uWSGI doesn't shutdown gracefully.
#
# $ ./uwsgi \
# --wsgi-file=threads_heavy.py --master --http-socket=:8000 \
# --workers=4 --threads=8 --max-requests=20 --min-worker-lifetime=6 -L \
# --worker-reload-mercy=20 2>&1 | tee uwsgi.log
#
# $ hey -c 16 -z 3m 'http://127.0.0.1:8000/'
#
# $ grep MERCY uwsgi.log
# Tue Mar 19 14:01:59 2024 - worker 1 (pid: 62113) is taking too much time to die...NO MERCY !!!
# Tue Mar 19 14:02:23 2024 - worker 2 (pid: 62218) is taking too much time to die...NO MERCY !!!
# ...
#
# This was caused by pthread_cancel() is called from non-main thread.
def fibonacci(n):
if n <= 1:
return n
return fibonacci(n - 1) + fibonacci(n - 2)
def application(env, start_response):
start_response('200 OK', [('Content-Type', 'text/html')])
n = 24
r = fibonacci(n)
s = f"F({n}) = {r}"
return [s.encode()]
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