Memory-consistency affects how threads observe shared data. 内存一致性会影响线程如何观察到共享数据。
Without a clear memory-consistency model, the same concurrent program may produce different outcomes on different CPUs due to reordering and caching effects. 如果没有清晰的内存一致性模型,由于指令重排与缓存等影响,同一个并发程序在不同 CPU 上可能产生不同结果。