From http://man7.org/linux/man-pages/man5/proc.5.html:
(22) starttime %llu
The time the process started after system boot. In
kernels before Linux 2.6, this value was expressed
in jiffies. Since Linux 2.6, the value is expressed
in clock ticks (divide by sysconf(_SC_CLK_TCK)).
// and so on...
cutime, // stat cumulative utime of process and reaped children
cstime, // stat cumulative stime of process and reaped children
- start_time; // stat start time of process -- seconds since 1-1-70
+ start_time; // stat start time of process -- seconds since system boot
#ifdef SIGNAL_STRING
char
// Linux 2.1.7x and up have 64 signals. Allow 64, plus '\0' and padding.