number of instances in Performance Counter Monitor

Hi

I try to monitor processor load on a GPU based 'number cruncher'.

It is a Windows machine running Windows Server 2008R2

Performance Monitor on the machine shows 32 CPUs.

I'm monitoring the machine using WMI. Everything works fine, expect CPU load for the individual processors.

Server details shows Avg CPU load but not individaul CPU loads.

If I make I SAM template and use a Performance Counter Monitor, it Fails if a try to address all instances (*)

Counter: % Processor Time

Category: Processor

- Instance = 1 --> ok

- Instance = _Total --> ok

- Instance = * --> failed (HResult: The data is not valid.)

Is there a Limitation for the number of instances?

Thanks in advance

Thomas