| 摘要 |
A system for providing a zero copy transmission with raw packets includes an operating system that receives an application request pertaining to a data packet to be transmitted over a network, where the data packet has already gone through networking stack processing invoked by the application. The operating system queries a driver of a network device on whether the network device has a zero copy capability. Based on the query response of the driver, the operating system determines whether a zero copy transmission should be used for the data packet. If not, the operating system copies the data packet from the application memory to a kernel buffer, and notifies the driver about the data packet in the kernel buffer. If so, the operating system refrains from copying the data packet to the kernel buffer, and notifies the driver about the data packet in the application memory. |
