get execution time of a script

Shell Programming and Scripting
1

Hi,

I have a simple question. How can I get the execution time of a script and maybe put it in a variable?

Another question. How can I get only time and not date and put it in a variable? I tried something with "date" command but with no success...

If someone could help me...

2 
$ script_times=$(/usr/bin/time -p my_script 3>&2 2>&1 1>&3 3>&-)
$ echo "$script_times

real   0.01
user   0.00
sys    0.01
$

$ current_time=$(date +%T)
$ echo $current_time
11:26:20
$ current_time=$(date +'%H.%M.%S')
$ echo $current_time              
11.27.50
$

Jean-Pierre.

3

ok, thx a lot for your answer.

Another question : what is the difference between real time, user time and system time?

And I just realized that if forgot a part of my question previously so I ask it now :

In fact i run a script which is calling other scripts. And what i'd like to do is to print at the end of each children script something like

Thx for your answers

4

You can do something like that :

elapsed()
{
   (( seconds  = SECONDS ))
   "$@"
   (( seconds = SECONDS - seconds ))
   (( etime_seconds = seconds % 60 ))
   (( etime_minuts  = ( seconds - etime_seconds ) / 60 % 60 ))
   (( etime_hours   = seconds / 3600 ))
   (( verif = etime_seconds + (etime_minuts * 60) + (etime_hours * 3600) ))
   echo "elapsed time: ${etime_hours}h${etime_minuts}m${etime_seconds}s"
 }

elapsed sleep 67

Output:

elapsed time: 0h1m7s

Jean-Pierre.

5

Thx a lot Jean Pierre,
I tested it and it works.... in bash shell. And i need it for a csh script and here it doesn't work (snif..)
When I just copying the script it send me this error :

and when I remove the first (), it worst... :

I'll try to find out something by myself, but if you have any suggestion, i'll appreciate it!

And sorry not to tell what kind of shell i was writting at the beginning.... :o:o

Regards

6

Hi,

I don't know if I can ask, but I found this function very interesting..

elapsed()
{
   (( seconds  = SECONDS ))
   "$@"
   (( seconds = SECONDS - seconds ))
   (( etime_seconds = seconds % 60 ))
   (( etime_minuts  = ( seconds - etime_seconds ) / 60 % 60 ))
   (( etime_hours   = seconds / 3600 ))
   (( verif = etime_seconds + (etime_minuts * 60) + (etime_hours * 3600) ))
   echo "elapsed time: ${etime_hours}h${etime_minuts}m${etime_seconds}s"
 }

At first time I didn't try to make it work, but I was wrong. In fact each time I am using this function on my script I get

elapsed time: 0h0m0s

Do you mind to tell me how to make it work correctly ? can you please help me ?

Thanks

7

How are you using this function?
if you are doing something like this :

code code
code code
code code
elapsed

I understand why it doesn't works. You have to specify on which script you want to apply elapsed.
e.g :

elapsed yourscript.sh

Jean-Pierre used "sleep 67" as an example.

Regards

8

Dear Moumou,

You're right. I didn't see this fonction on that way. As I am aleady using a script that needs an input file, I can't using like this :

elapsed myscript.ksh input_file

do you know a way to do the same thing on my script ?

I am looking to monitor the execution time of myscript.ksh

Thanks

9

You can use this function even with a script who needs parameters.
Indeed, in the example of "sleep 67", "67" is a parameter.

I use it withe a script who has 10 parameters and it works very well!

Regards