Instead of having multiple directly accessible arguments, you get a pointer into main memory and the SPE has to issue DMA requests to get the pointed-to data from main memory.
它没有使用多个可直接访问的参数，而是使用一个指向主存的指针，SPE需要发出dma请求来从主存中获取指针所指向的数据。
Back to the API: the PPE can pass a single pointer into the program, so multiple arguments have to be bundled up. My solution is this.
现在回到API上来：PPE只能向程序传递一个指针，因此多个参数必须要捆绑在一起传递。
A reference is an application specific pointer to an object that usually lives in a larger context, such as a server or cluster, and is used by multiple parties.
引用是应用程序的特定指针，该指针指向通常存在于更大的上下文(如服务器或集群)中并且供多方使用的对象。
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