What is hyperthreading or hypertransport technology?
hyperthreading allows two or more “threads of execution” to run in a processor simultaneously. Some of the processor’s resources are duplicated to perform this task. In particular, the register set, program counters, machine state, and a few other things are replicated for each hyperthread. Actually, the term hyperthread is just Intel’s trade name for CPU threads. At the time Intel introduced it, it was the only company offering multiple CPU threads on an x86 chip, but since then AMD did too. CPU threads have more or less disappeared on more recent Intel processors, in favor of multiple cores. But they are not mutually exclusive technologies… you can have multiple cores each with set of multiple CPU threads. So hyperthreading may reappear on future Intel multi-core chips. In fact, I think it’s pretty likely that it will. — Hypertransport is a high speed bus for interconnecting processors with each other or with peripherals and memory.
