Hypertheading Support on a Dual Core CPU
What is hypertheading?
Hyperthreading is an optional feature in newer Intel CPUs which presents two virtual CPU cores running on a single physical core. In effect, the extra thread will execute when the first thread is busy doing something else. Wikipedia has a [http://en.wikipedia.org/wiki/HyperThreading page] describing it in much more detail.
Hyperthreading with a Dual Core CPU?
Intel's Core Duo CPU is based on the same architecture that supports hyperthreading technology. If you run "cpuid" on such a CPU it will report that the chip supports hyperthreading. However, this is misleading. While the architecture supports this feature, this particular CPU model only contains one thread per core. On an SMP kernel both cores will show up as CPUs, but that is all.