然而，如果两个或更多进程要使用共享内存进行通信，那么它们需要有相同的地址空间，从而限制了它们所能使用的地址。

However, if two or more processes want to communicate using Shared memory, they need to have the same address space, thus limiting the addresses they can utilize.

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Flume模型假定在同一台机器上运行着许多进程，并且通过消息或“流”相互通信。

The Flume model assumes many processes running on the same machine and communicating via messages, or “flows”.

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文中重点分析了采用计数器信号量解决多进程同步通信，即生产者—消费者问题。

But the focus in this paper is the application of counting semaphore in VxWorks, which can be used in the Producer_Consumer problem to solve the data synchronism in multi process communication.

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