What are the timer functions to measure the kernel function time

Kernal Function Timefunction "do_gettimefoday" is used to get the time value in kernel.

struct timeval time;

unsigned long local_time;

do_gettimeofday(&time); local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60)); rtc_time_to_tm(local_time, &tm);

printk(" @ (%04d-%02d-%02d %02d:%02d:%02d)\n", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);

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