Research and Implementation of Packet Capture Based on Multi-core Binding Technology in Linux Environment

摘要

According to zero-copy idea and the application of multi-core binding to realize a high-performance packet capture platform based on multi-core binding (MCPCP). By modifying the memory management mode about sk_buff in kernel, realize the user space program to directly access the data packet, which is a kind of universal significance of the zero-copy scheme. And then through the multi-core binding technique, for each CPU core scheduling and control, with multi-threaded user programs can minimize the cache jitter to improve the efficiency of packet capture. Experiments show that in the case of low-end configuration, the throughputs of MCPCP for 64 Byte and 1500 Byte messages are 620,000 pps (about 320 Mbps) and 78,000 pps (about 941 Mbps) respectively. In the high-end configuration, can reach 1.46 million pps (748 Mbps) and 81,000 pps (979 Mbps). MCPCP surpasses the traditional ones' in performance.