大型高能物理实验数据采集系统普遍采用多级触发结构,各级间用网络将数据发送到更高级别的系统。以太网技术多作为触发数据传输的媒介。为提高系统传输效率,找到系统数据传输的优化方法,本文基于ARM平台,从数据流角度阐述了Linux2.4内核网络数据的接收过程,并结合测得的内核内部数据分析了网络性能变化的具体原因,给出优化系统性能的方向。 Large-scale high-energy physics experimental data acquisition system commonly used multi-level trigger structure, all levels of the network to send data to a higher level system. Ethernet technology and more as a trigger for data transmission media. In order to improve the system transmission efficiency and find the optimal method of system data transmission, based on ARM platform, this paper expounds the data receiving process of Linux2.4 core network from the perspective of data flow, and analyzes the concrete changes of network performance based on the measured internal data Reason, given the direction of optimizing system performance.