中图分类号：TP368.1
文献标识码：A
DOI:10.19358/j.issn.2097-1788.2023.07.013
引用格式：苏平，高飞，刘凯，等.一种可扩展的高精度可靠IO时序测试方法［J］.网络安全与数据治理，2023，42（7）：79-84.

A scalable high precision and reliable IO timing sequence testing method

Abstract： In this paper, a scalable highprecision and reliable IO timing test method is proposed to solve the problems of small number of timing measurements and low accuracy and reliability of existing IO testing methods, and a scalable largescale distributed IO timing test system based on hierarchical hybrid network architecture and unified clock is implemented. The test shows that the system not only effectively improves the capacity scale of IO timing sequence, but also guarantees the measuring time accuracy of each timing sequence. At the same time, the measuring accuracy will not accumulate with the increase of levels, and the error consistency between different levels is high. It can meet the requirements of largescale asynchronous IO timing sequence testing while giving consideration to high precision and high reliability, which has certain practical value.

Key words : timing sequence testing; hierarchical network; time synchronization