...or, making sure that the customer was aware of IBM's own published documentation, linked to in the paper, which explains the difference in how CPU utilizatio

...or, making sure that the customer was aware of IBM's own published documentation, linked to in the paper, which explains the difference in how CPU utilization may be calculated by AIX vs. Linux on the same hardware. You might wish to look at the paper describing how the PURR and SPURR components of recent POWER cpus assist with process accounting. I understand that there's going to be some inevitable Lintel chauvinism on HN, insofar as it's the most popular platform...but there may truly be other legitimate ways of doing things.