C-states and NUMA

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C-states and NUMA

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Hi,
I recently found C-States may be a key to enable NUMA in my machine.
I use Intel VTune Amplifier for profiling and it asks me to disable C-States to avoid system hanging.
However, by disabling C-States and enabling NUMA in BIOS, when I checked /proc/cpuinfo,
I can only see "one core" after booting.
My machine's model is Dell T5500 and equipped with two Intel Xeon E5640 CPUs.

The red hat version is Red Hat Enterprise 5.5 and linux kernel is 2.6.18-194.el5

If this is always the case, how can I use Amplifier to test my NUMA related code?
Or there exists some alternatives?

Thanks.

BR,
David

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