So what does the copy operation look like? If we do the mem copy, it looks like this.

那么复制操作是什么样子的呢？如果我们进行 mem 复制，它看起来像这样。

But what if we copy eight kilobytes? If we set that w length to eight kilobytes, then the mem copy operation is going to copy that variable plus 8,190 bytes into that DMA buffer from the stack.

但是如果我们复制 8 KB 呢？如果我们将 w 长度设置为 8 KB，那么内存复制操作将把该变量加上 8,190 字节从堆栈复制到 DMA 缓冲区中。