convert jiffies to seconds

Question

I\'ve got a piece of userspace code which is parsing /proc/PID/task/TID/stat to get the cpu usage. I can use HZ to get the jiffies per second but this code could move to an

Answer 1

You divide it by the number you get from sysconf(_SC_CLK_TCK).

However, I think this is probably always 100 under Linux regardless of the actual clock tick, it's always presented to userspace as 100.

See man proc(5).