基地址寄存器
- 网络Base Address Register;BAR;base register
基地址寄存器-
当传输信令帧时通过I／O域重映射技术，由用户程序直接对网络设备的基地址寄存器进行读写，减少了频繁陷入内核带来的开销。
Thirdly , when token packet transmitted , " Remapping Specific I / O Regions " technique is used to allow user accessing device 's base address register directly and avoid the unnecessary expense that would be caught in frequently access kernel .