内核模块时间测量

Question

I am trying to make a kernel module based on linked list and I want to measure the execution time of insertion of 1000 items into the list.

What header file and what function should I use to measure the starting time and the end time?

    // start clock here
    for(i = 0; i < 1000; i++)
    { 
         struct my_node* new = kmalloc(sizeof(struct my_node), GFP_KERNEL);
         new->data = i;
         list_add(&new->entry, &my_list);
    }
    // end clock here
    // print out the execution time in seconds here

Answer 1

I provide you a link to a kernel module of mine where I solved the same task.

Here is the GitHub project link where you could look at the method print_perf_data to see how I collect performance data and print them calculating the elapsed time.

Regards.