Wednesday, December 25, 2002

A Short Summary of Hyper Threading
Hyper-Threading Technology brings the simultaneous multi-threading approach to the Intel architecture(where multiple threads can execute on a single processor without switching).
Hyper-Threading Technology makes a single physical processor appear as multiple logical processors. To do this, there is one copy of the architecture state for each logical processor, and the logical processors share a single set of physical execution resources. Processes or threads can be scheduled to logical processors as on conventional physical processors in a multi-processor system, and instructions from logical processors will persist and execute simultaneously on shared execution resources.
Each logical processor maintains a complete set of the architecture state. The architecture state consists of registers including the general-purpose registers, the control registers, the advanced programmable interrupt controller (APIC) registers, and some machine state registers.

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