| J. Tracey, A. Banerji, "Device driver issues in high-performance networking", USENIX, High-Speed Networking, California, pp. 31-43, August 1994. |
....segmentation, etc. and cache lines are selectively invalidated before or after a DMA transfer to guaranty memory coherency [Thekkath93] Because of these constraints, the IBM Ethernet driver defines a few static, page aligned, pinned and mapped transmit and receive buffers in the host memory [Tracey94]. An outgoing Ethernet frame is first copied to such a buffer and then moved by DMA to the adapter. This additional copy results in higher performance than pinning and mapping an arbitrary mbuf chain [IBM92] The system environment aspect System related tasks have always been known as being ....
J. Tracey, A. Banerji, "Device driver issues in high-performance networking", USENIX, High-Speed Networking, California, pp. 31-43, August 1994.
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