The third copy happens as the DMA engine passes the data from the kernel socket buffers to the protocol engine.
数据的第三次复制发生在dma引擎将数据从内核套接字缓冲区传到协议引擎时。
Step three: the third copy happens as the DMA engine passes the data from the kernel socket buffers to the protocol engine.
步骤三：dma模块将数据由socket的缓冲区传递给协议引擎时，第3次复制发生。
Step three: the third copy happens as the DMA engine passes the data from the kernel socket buffers to the protocol engine.
步骤三：dma模块将数据由socket的缓冲区传递给协议引擎时，第3次复制发生。
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