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How to get Exact CPU time of a job

 
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Vinay Kumar M
Beginner


Joined: 02 Jun 2015
Posts: 12
Topics: 6
PostPosted: Fri Jun 26, 2015 4:41 am    Post subject: How to get Exact CPU time of a job Reply with quote
Hi

when I had submitted a job it is showing in job log as

Code:
IEF403I JAAFCQ45 - STARTED - TIME=12.09.53
*
*
IEF404I JAAFCQ45 - ENDED - TIME=12.11.24


In JESYSMSG it showing as

Code:
 CPU:     0 HR  00 MIN  04.42 SEC    SRB:     0 HR  00 MIN  00.20 SEC


So what is this 0 HR 00 MIN 04.42 SEC indicate Exactly ?? and Is this based on Started-time and Ended-time. What is the relation between them(CPU time and Start-End times).

Because we need to compare Exact CPU Time for two other jobs.
Please help on this. Thanks in Advance.

Thanks in Advance
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Terry_Heinze
Supermod


Joined: 31 May 2004
Posts: 391
Topics: 4
Location: Richfield, MN, USA
PostPosted: Fri Jun 26, 2015 8:26 am    Post subject: Reply with quote
The IEF403I and -404I indicate elapsed (wall clock) time. The JESYSMSG indicates the actual CPU time for the job which excludes swapped out time, wait time, etc.
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t-bonham@scc.net
Supermod


Joined: 18 Oct 2012
Posts: 30
Topics: 0
Location: Minneapolis, MN
PostPosted: Sat Jun 27, 2015 9:13 pm    Post subject: Reply with quote
There is effectively NO relation between the clock start time & end time, and the CPU time used. Because the mainframe is shared, and is running many other jobs besides yours at the same time, plus all the OS overhead tasks.
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Vinay Kumar M
Beginner


Joined: 02 Jun 2015
Posts: 12
Topics: 6
PostPosted: Mon Jun 29, 2015 4:15 am    Post subject: Reply with quote
Thanks for this clarification. Smile
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