准备就绪
Physical RAM (内存条)
User Space
0x7F.. App Buffer
Syscall (用户/内核切换)
Code (Logic)
TCP Logic
IP Logic
MAC/Driver
Data (Buffer)
0xFF.. Socket Buffer
(sk_buff)
Ring Buffer
0xFA..
0: [Empty]
1: [Empty]
2: [Empty]
PCIe
Hardware (NIC)
DMA
↔
On-Chip SRAM
(FIFO)
↔
PHY
Data