import time
import random
import os
import threading

NTHREAD = os.cpu_count() * 2

def random_sleep():
    secs = random.random() * 0.010
    time.sleep(secs)

class Stress(threading.Thread):
    daemon = True

    def run(self):
        counter = 0
        while True:
            counter += 1
            random_sleep()
            counter -= 1

threads = [Stress() for _ in range(NTHREAD)]
for thread in threads:
    thread.start()

# don't join threads