How to measure the rendering time of the frame buffer in Linux?

Question

I want to measure the lcd rendering time in the Linux lcd driver in kernel space. Please suggest standard methods to measure the rendering time?

Answer 1

You can user do_gettimefoday function to get the time value.

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);