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Mike Nitz

I've tried to capture the CPU% utilized by each job through RMF monitor III reports, that was a bust. I've tried to get the info from the SDSF DA panel, so far it's a nogo. I've searched the forums & haven't found anything. How can I trap this information?? I'm at my wit's end!!!!

semigeezer · Posted: Tue Jan 10, 2006 9:28 pm Post subject:

If you are willing to do a sampling and then wait a little, sampling again and doing some math, you can get the CPU time of each job by looking at the ASCBEJST field in each job's ASCB. This post will give you an idea how to run the ASVT to get the ASCBs for all address spaces. You then check CHTRKID for the type to verify it is a job and ... well... look here for the rest about finding jobs.

Be sure to do a real sleep between samplings because you want your exec to be completely inactive during the sampling period. the syscalls sleep function will do that (or any of a number of wait commands that use STIMER available on the web). Also, if you are using a multi-CPU box, you'll need to define what CPU% means to you (CPUTime/Elapsed, or CPU/Elapsed/#CPUs, etc)

nevilh · Beginner Joined: 11 Aug 2004 Posts: 115 Topics: 0

ASCBEJST will give you elapsed time not CPU % utilized

DaveyC · Posted: Wed Jan 11, 2006 8:12 am Post subject:

vjkumk · Beginner Joined: 28 Sep 2005 Posts: 98 Topics: 33

use SYSVAR(SYSSRV) in REXX
Use the following arguments to obtain information related to the system.
SYSCPU the number of seconds of central processing unit (CPU) time used
during the session in the form: seconds.hundredths-of-seconds.
You can use the SYSCPU argument and the SYSSRV argument,
which returns the number of system resource manager (SRM)
service units, to evaluate the:
Performance of applications
Duration of a session.

nevilh · Beginner Joined: 11 Aug 2004 Posts: 115 Topics: 0

Time reported in message IEF374I includes SRB time and enclave time this is not the same as the time reported in ASCBEJST. Documention is specific

dtf · Posted: Wed Jan 11, 2006 12:50 pm Post subject:

If you happen to have STROBE, you might look into using it. However, this may be overkill for what you are looking for.
________
herbal vaporizers

Bill Dennis · Posted: Wed Jan 11, 2006 1:10 pm Post subject:

Do you really want the percent of the CPU used overall by a given job?

Get the CPU time and ELAPSED time from SMF type30 JOB recs and calculate (x/(y*z)) * 100 = percent of available CPU consumed by one job
x = CPU time used by job
y = elapsed time of job
z = number of processors available
_________________
Regards,
Bill Dennis

Disclaimer: My comments on this foorum are my own and do not represent the opinions or suggestions of any other person or business entity.

semigeezer · Posted: Wed Jan 11, 2006 2:44 pm Post subject:

I went back and looked at the old code for TASID. ascbejst is CPU time. ascbsrbt is srb time. Those 2 can be combined as mentioned. Elapsed time is calculated current stck time - ascbints. TASID numbers match those shown by SDSF and RMF (or at least they did the last time I looked). There are other timings for various things. Offhand, I forget how to tell the elapsed time of a particular job step, but I think there is a timestamp in the OUCB for that - or something like that.

DaveyC · Posted: Mon Jan 16, 2006 7:30 am Post subject:

nevilh,

I think you're confusing elapsed time with wall time. Also, enclave is an LE term, which has absolutley no relevence to this thread! If you don't belive me why don't you check out the SDSF source and see how CPU time is calculated. Normally you can find it in ISF.SISFSRC(ISFDA).

Here's a snippet...