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请问哪里能查到ARM A53各个指令执行所需要的cycle数 ？

dycong

谢谢！

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    我猜你想去做性能优化，数cycle？其实现在OoO的存在，单纯地去看cycle数没有意义，特别是在大型操作系统，比如linux和android,他们自己还会做一些调度，延迟更多的来自于存储系统，而不是pipeline, 更好的办法是使用streamline，perf之类的工具找到实际程序哪段代码占用的资源最多，进行有针对性的优化