No. the seconds in 00:00 is a rounded value. Many processes use small amounts of CPU time, less than 1 ms. And yes it is parent + all children.
We are on a fast HPUX PA_RISC box. Most processes show 00:00 because they use a tiny amount of CPU time.
Code:
jmcnama 3002 2993 0 08:29:57 ? 0:00 sshd: jmcnama@pts/0
jmcnama 11290 3005 1 10:13:53 pts/0 0:00 grep jmc
root 2993 2175 0 08:29:51 ? 0:00 sshd: jmcnama [priv]
jmcnama 3005 3002 0 08:29:57 pts/0 0:00 -ksh
jmcnama 8732 1 0 Apr 29 ? 0:07 uzpletd a b
jmcnama 11289 3005 2 10:13:53 pts/0 0:00 ps -ef
uzpletd is a
daemon running in test mode for 14 days. All the other processes show 00:00.