def main():
if len(sys.argv) != 3 and len(sys.argv) != 4:
print "Usage: python system_model [trial_number] [collect_metrics(true/false)] [probability of a send]"
msg_queues = [Queue() for _ in range(3)]
threads = []
pids = []
for i in range(3):
clock_speed = random.randint(1,6)
p = Process(i, msg_queues, (clock_speed))
pid = os.fork()
if pid == 0:
p.run_process()
elif pid < 0:
print 'Fork error'
sys.exit(1)
else:
pids.append(pid)
for pid in pids:
os.waitpid(pid, 0)
