起初，我们有单核 CPU^{(single core CPUs)}。这些CPU^(CPUs)以特定速度运行，并且可以以该特定速度提供性能。然后是多核^{(multiple cores)}CPU^(CPUs)的时代。在这里，每个单独的核心都可以独立地提供自己的速度。这成倍地增加了CPU的功率，从而提高了计算设备的整体性能。但人类的倾向是总是寻找更好的。因此^(Hence)，引入了多线程^{(multithreading)}，稍微提高了性能——但随后出现了超线程^{(Hyper-Threading)}。它于 2002 年首次推出，采用 Intel 的Xeon处理器^(Processors) . 随着超线程的实现，CPU总是忙于执行某些任务。

它最初是与 Intel 的Xeon芯片一起推出的，然后随着Pentium 4出现在基于消费者的^{(Pentium 4)}SoC^(SoCs)中。它存在于 Intel 的Itanium、Atom以及Core 'i' 系列处理器中。

什么是计算机中的超线程？

这就像使CPU从一个任务切换到另一个任务的等待时间或延迟可以忽略不计。它允许每个核心连续处理任务，而无需任何等待时间。

借助超线程^{(Hyperthreading)}，英特尔^(Intel)旨在降低单个内核特定任务的执行时间。这意味着处理器的单个内核将一个接一个地执行多个任务，而没有任何延迟。最终，这将减少完全执行任务所需的时间。

它直接利用了超标量架构，其中多条指令对单独的数据进行操作，排队等待由单个内核处理。但为此，操作系统也必须兼容。这意味着操作系统必须支持SMT或同时多线程。

此外，根据Intel的说法，如果您的操作系统不支持此功能，您应该禁用超线程。

超线程的一些优点是 -

1. 同时运行^(Run)要求苛刻的应用程序，同时保持系统响应能力
2. 保持系统受到保护、高效和可管理，同时最大限度地减少对生产力的影响
3. ^(Provide)为未来的业务增长和新的解决方案能力提供空间

综上所述，如果您有一台用于包装某些盒子的机器，则包装机必须在包装一个盒子后等待，直到它从同一传送带上获取另一个盒子。但是，如果我们实施另一条传送带为机器服务，直到第一条传送带取出另一个盒子，这将提高包装盒子的速度。这就是超线程通过单核CPU实现的。

What is Hyperthreading in CPU and how does it work?

At first, we had single core CPUs. These CPUs were clocked at a certain speed and could deliver performance at that particular speed. Then came the age of CPUs with multiple cores. Here, every individual core could deliver its own speed independently. This exponentially increased the power of a CPU and thereby increased the overall performance of the computing device. But the human tendency is to always look out for even better. Hence, multithreading was introduced which slightly increased the performance – but then came Hyper-Threading. It was first introduced in 2002 with Intel’s Xeon Processors. With the implementation of hyperthreading, the CPU was always kept busy with the execution of some task.

It was first introduced with Intel’s Xeon chip, and then it made an appearance to the consumer-based SoCs with the Pentium 4. It is present in Intel’s Itanium, Atom as well as Core ‘i ‘ series of processors.

What is HyperThreading in computers?

It is like making the waiting time or latency for the CPU to switch from one task to another being negligible. It allows each core to process tasks continuously without any wait time being involved.

With Hyperthreading, Intel aims to bring down the execution time of a particular task for a single core. This means that a single core of a processor will be executing multiple tasks one after the other without any latency. Eventually, this will bring down the time taken for a task to be executed fully.

It directly takes advantage of the superscalar architecture in which multiple instructions operate on separate data are queued for processing by a single core. But for this, the operating system must be compatible too. This means that the operating system must support SMT or simultaneous multithreading.

Also, according to Intel, if your operating system does not support this functionality, you should just disable hyperthreading.

Some of the advantages of Hyperthreading are-

1. Run demanding applications simultaneously while maintaining system responsiveness
2. Keep systems protected, efficient, and manageable while minimizing the impact on productivity
3. Provide headroom for future business growth and new solution capabilities

Summing up, if you have a machine that is used to pack some box, the packing machine has to wait after packing one box until it gets another box from the same conveyer belt. But if we implement another conveyer belt that serves the machine until the first one fetches another box, it would boost the speed to pack the box. This is what Hyperthreading enables with your single-core CPU.

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