nmon showing wrong CPU clock rate   

Please give us some clues to work on:

• What AIX level ? oslevel -s
• Which nmon versions ? nmon -v

thanks Nigel

ps: this still looks like a user error to me. How would nmon via the API get the wrong details?

Thanks for the information and quick too.

Of course, the output is completely impossible
No seriously.
All I can think of is that the AIX kernel has cached the processor details and resupplying them. This suggests you just moved the disks from the 1.65MHz machine to the new POWER6 one without all that tedious reloading and mucking about with mksysb etc? Is that right?
Was the LPAR reporting the correct Hz a fresh install?

Can you run the "cpus" (note the "s") program from the sample code AIX Wiki page at
http://www-941.ibm.com/collaboration/wiki/display/WikiPtype/ryo
which outputs the CPU frequency in exactly the same way as nmon.
It is output on the first line.

This may duplicate the problem - in which case it can be reported to AIX Support for a fix.

The problem is that the AIX API is telling nmon the wrong details - not much nmon can do about it?

Ideas welcome, Nigel

Refer support to the same website and they have the complete source code.
This will highlight exactly the API and they can read it and run it to show the problem.

My guess this is in the ODM.

let us know if they tell you hw to get it accurate - there are probable 100's of machines like this now and the number is growing rapidly.

thanks Nigel

Remove all defined processors that you have from AIX, Defined old type processor are confusing nmon cpu statistics.