What is Hyper-Threading ?: The Basics Explained

What is Hyper-Threading ?: The Basics Explained


No, a CPU with Hyper-Threading does not consist of two physical processors, nor will applications run twice as fast. And the benefit for an individually running application will in most cases amount to the slightly increased clock rate. The boundary between a PC with an HT CPU and a dual system will continue to run clearly in the future. While a PC with two CPUs can run identical threads in parallel and can thus theoretically accelerate individual programs by 100 percent, Hyper-Threading takes a different approach, namely the effective use of the processor core.

However, it is The task of the operating system to distribute the work that arises sensibly between the two virtual processors. However, since games are rarely programmed for multi-processor systems and are therefore not “threaded”, the operating system cannot sensibly distribute the processing load. In this respect, the work gets stuck on a processor again. For this it should theoretically be possible to let an application running parallel to the game continue to run at almost unchanged speed and not have to send it to 'idle mode'.

Pentium 4 HT

At least in theory, the idea of ​​'Hyper-Threading' appears as plausible and ingenious. If you consider that in today's CPU often entire areasblocked because the thread currently being processed, e.g. mainly occupies the floating point unit (FPU) and/or a few other units of the processor, then you can only feel queasy about the lost power. Hyper-Threading tries to counteract this development by allowing a processor equipped with it to run two threads in parallel through its second allocator unit and thus not using the core optimally, but in most cases more effectively.

Believes one of the messages haunted by the net, then it will be Thursday, November 14th, 2002 and we will know more about this topic.

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