Possible Duplicate:
What are threads, and what do they do in the processor?
I know a process can have multiple threads, on my Windows 7 machine each process has over 10 threads in avg.
But what does thread mean in terms of CPUs. Here it says my CPU has actually 4 CPUs AND 8 threads. When I open my task manager I see the usage of each of the 8 threads, but what is a thread?
Answer
Intel are talking about something different from the normal process threads.
They are talking about their "Hyper-Threading" technology that allows the cores in the CPU to each perform the work of (almost) two.
Hyper-threading works by duplicating certain sections of the processor—those that store the architectural state—but not duplicating the main execution resources. This allows a hyper-threading processor to appear as two "logical" processors to the host operating system,
(Wikipedia)
Hyper-Threading … delivers two processing threads per physical core.
(Intel)
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