linuxcpu-time

/usr/bin/time, interpret the output

I wanted to record the cpu time of running some programs, I put /usr/bin/time command in from the the command, like the following:

/usr/bin/time command_name_and_args

the result I got as follow:

652.25user 5.29system 11:53.85elapsed 92%CPU (0avgtext+0avgdata 5109232maxresident)k
3800352inputs+1620608outputs (2major+319449minor)pagefaults 0swaps

would it be correct for the cpu time is 652.25 + 5.29 = 657.54 seconds?

and does 11:53.85elapsed mean 11 minutes 53.85 seconds on wall clock?

Thanks for help.

Solution

  • Exactly. CPU time might exceed wall clock time if you have more than one thread.