asyncio 中 loop.run_forever() 方法导致 100% CPU usage

python 版本：3.10.1 或 3.10.2
代码：

def main():
    log_listener = setup_logging(log_filename)

    e = asyncio.Event()
    consumer = Consumer(e)

    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    signals = (signal.SIGHUP, signal.SIGTERM, signal.SIGINT)
    for sig in signals:
        loop.add_signal_handler(
            sig, lambda s=sig: asyncio.create_task(shutdown(s, loop, consumer))
        )

    tasks = consumer.run()
    try:
        for name, task in tasks.items():
            loop.create_task(task, name=name)
        loop.run_forever()
    finally:
        loop.close()
        log_listener.stop()

consumer.run() 方法会返回一个 Dict[str, Coroutine] 类型的字典。最初以为是自己的 coroutine 实现有问题导致 high CPU 。然后将 tasks 中的 coroutine 一个个移除，最后 tasks 返回空的情况下也是 100% CPU 。
用 cProfile 看了下：

   Ordered by: cumulative time
   List reduced from 3038 to 10 due to restriction <10>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    423/1    0.005    0.000   44.862   44.862 {built-in method builtins.exec}
        1    0.000    0.000   44.862   44.862 myscript.py:1(<module>)
        1    0.000    0.000   44.219   44.219 myscript.py:54(main)
        1    0.000    0.000   44.017   44.017 /home/xxx/.pyenv/versions/3.10.1/lib/python3.10/asyncio/base_events.py:582(run_forever)
        3    0.000    0.000   44.016   14.672 /home/xxx/.pyenv/versions/3.10.1/lib/python3.10/asyncio/base_events.py:1806(_run_once)
        3    0.000    0.000   43.983   14.661 /home/xxx/.pyenv/versions/3.10.1/lib/python3.10/selectors.py:452(select)
        3   43.983   14.661   43.983   14.661 {method 'poll' of 'select.epoll' objects}
    484/4    0.006    0.000    0.642    0.161 <frozen importlib._bootstrap>:1022(_find_and_load)
    483/4    0.003    0.000    0.642    0.161 <frozen importlib._bootstrap>:987(_find_and_load_unlocked)
    447/5    0.003    0.000    0.641    0.128 <frozen importlib._bootstrap>:664(_load_unlocked)

有 v 友遇到类似情况的吗？还是说我的用法有问题。