import argparse
import subprocess
import time


parser = argparse.ArgumentParser()
parser.add_argument('-n', type=int, required=True)
parser.add_argument('--binary', default='python3')

args = parser.parse_args()

errors = 0

for i in range(args.n):
    proc = subprocess.Popen(
        [args.binary, 'multiprocessing_hangs.py'],
        stdout=subprocess.DEVNULL,
        stderr=subprocess.DEVNULL,
    )
    try:
        proc.wait(timeout=30)
        print("{} ok".format(i))
    except subprocess.TimeoutExpired:
        proc.kill()
        print("{} fail".format(i))
        errors += 1

print("Ran multiprocessing_hangs.py {} times, failed {} times or {} %".format(args.n, errors, 100*errors//args.n))