关键词: 软中断, 下半部处理机制, Linux内核, 最大循环检测次数

Abstract: As the most strict bottom half handling mechanism of interruption on time accuracy, soft interrupt mechanism plays an irreplaceable role in the process of handling network packet. However, unalterable circular check times taken by soft interruption handling function causes system unable to handle packets effectively under high traffic load. This paper presented a methodology of adaptive circular checking times to optimize soft interruption handling mechanism. Test shows that compared with the former mechanism, current soft interruption mechanism can handle more soft interruption routines in the same condition, i.e. capturing more network packets. The methodology improves the system′s capacity to handle soft interruptions and optimizes the handling capability of Linux network.

Key words: soft interruption, bottom half handling mechanism, Linux kernel, max circular checking times