Linux内核中进程的年龄 [英] Age of a process in the Linux kernel

问题描述

给出要使用的struct task_struct.确定一个流程有多长时间的最佳方法是什么?

Given the struct task_struct to work with. What's the best way to determine how old a process is?

task_struct用于保存指向其下一个最小的兄弟姐妹和最大的孩子的特定指针.在某些内核版本中似乎不再可用.

The task_struct is used to hold specific pointers to it's next youngest sibling, and oldest child. That no longer seems to be available in some kernel versions.

我专门使用Android金鱼内核.我一直在尝试学习如何使用list_head结构遍历进程，但似乎无法弄清楚如何确定每个孩子或同级进程的年龄.

I'm specifically using the Android goldfish kernel. I've been trying to learn how to use the list_head structure to iterate over processes, but I can't seem to figure out how to determine the age of each child or sibling process.

那么，task_struct的哪个成员或用法将执行此操作?

So, what member or usage of task_struct would do this?

推荐答案

我认为您可以在task_struct中使用real_start_time或start_time. 在创建流程时会对其进行更新

I think you can use real_start_time or start_time in task_struct. It is updated at the time of process creation

    struct timespec start_time;             /* monotonic time */
    struct timespec real_start_time;        /* boot based time */

注意:这是普通内核，对Android内核一无所知

Note: this is vanilla kernel no idea about android kernel

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