基于设备轮询机制对频繁中断响应的改进

Improvement of frequent interruption response based on device polling mechanism

对目前存在的数据包捕获机制进行分析研究,发现影响捕包性能的主要因素在于:数据包在传输过程中冗余的拷贝、频繁的中断响应以及上下文切换所造成的开销。主要针对影响捕包性能因素之一—频繁的中断响应,分析网卡工作方式和传统捕包平台的数据包传输过程,运用设备轮询机制改进频繁的中断响应,以实验进行验证并对数据结果加以分析。

On the analysis of current packet capture mechanism,we discover the main factors of influence of packet capture performance.They are packet data redundant copy during transmission,frequent interruption and the overhead caused by context switching.A factor mainly affects packet capture performance,that is frequent interruption response.Analysing the working mode of network card and data packet transmission process on the traditional packet capture platform.Using the device polling mechanism improve frequently interrupt response.It is verified with experiments and the data results are analysed.