Hi Jose Manuel,
Yes I agree that this is not making sense, from 1 workprocess point of view, but the reported back CPU-time from the OS should also means that this time are used by other workprocess as well during the dialog-step of that one workprocess. And since you have a multi-core CPU's and even one single CPU can handle multiple tasks (context-switch or multithreding or something like that), it means there is no possibility to track the real CPU-time back to 1 background job (even 1 workprocess can handle multiple tasks).
So your explanation is correct as well, being that the OS reported back the CPU-time in accumulated time.
That's why the response time couldn't have included CPU-time.
I hope this will help you.
Regards,
Andre