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

To clarify the math behind MarkR's answer:

sysconf(_SC_CLK_TCK) will get you jiffies per second. Divide jiffies by the number you get from sysconf(_SC_CLK_TCK) to get the total number of seconds.

      jiffies                      jiffies              seconds
--------------------    =     -----------------    =    -------    =    seconds
sysconf(_SC_CLK_TCK)          (jiffies/second)             1