Module zero_copy 

Zero-Copy Networking

Eliminates memory copies in the network stack for maximum throughput.

Zero-Copy Techniques

1. DMA Buffers: Direct memory access from network card
2. Scatter-Gather I/O: Compose packets from multiple buffers
3. Page Remapping: Transfer ownership instead of copying data
4. sendfile(): Kernel-to-kernel transfer bypassing user space
5. TCP_CORK: Batch small writes into single packet
6. Memory Mapping: mmap() network buffers to user space
7. TcpZeroCopySend: Combined scatter-gather + TCP segmentation

Structs

DmaBuffer

DMA-capable buffer

DmaBufferPool

DMA buffer pool for zero-copy operations

DmaPoolStats

ScatterGatherList

Scatter-gather list for zero-copy I/O

ScatterGatherSegment

SendFile

Kernel-to-kernel transfer (sendfile equivalent)

TcpCork

TCP Cork (batch small writes into single packet)

TcpZeroCopySend

TCP zero-copy send combining scatter-gather with TCP segmentation.

ZeroCopySend

Zero-copy send operation using scatter-gather DMA.

ZeroCopyStats

Statistics for zero-copy operations