Halo, what is hyper threading?

Hyper-Threading Technology is a new technology released by Intel in 2002. Intel was the first to be used on Xeron processors. As a result of this technology, Intel will be the world's first provider of a physical processor that integrates dual logic processor units (essentially two logic processor units on a single processor), which is said to increase processor performance by 30 percent.

The so-called hyper-threading technology is a processor technology that uses special hardware instructions to simulate two logical cores inside a multi-threaded processor into two physical chips, so that a single processor can "enjoy" thread-level parallel computing. Multi-threading technology can effectively enhance the processing power of the processor in multi-tasking and multi-threaded processing on operating systems and software that support multi-threading.

Hyper-threading technology can enable multiple threads of the operating system or application software to run on a hyper-threaded processor at the same time, and the two logical processors inside it share a set of processor execution units to complete operations such as addition, multiplication, and load in parallel. Doing so results in a 30% increase in processor processing power, as applications can make full use of the chip's individual computing units at the same time.

For a single-threaded chip, it can process thousands of instructions per second, but at a given time, it can only process one instruction (a single thread), and the result is that other processing units inside the processor will inevitably be idle. Hyper-threading, on the other hand, allows the processor to process more instructions and data in parallel (multiple threads) at a given time. It can be said that hyper-threading is a technology that can fully "mobilize" the temporarily idle processing resources inside the CPU.

I don't want to go into a long story.

HT technology inherits two logical operation units inside the CPU.

It can make the operating system think that there are 2 CPUs for computing, which can effectively improve the multitasking ability.

However, because only one computing unit is added, rather than a CPU core, the improvement of multitasking and multi-threading processing power is limited.

I had this problem when I bought a computer. Computer technicians say that the speed of computing has increased. Resembles a virtual processor.

One CPU, 2 logical operation units, and the operating system thinks that there are 2 CPUs performing the operation. Improve multitasking skills.

Hyper-threading technology uses special hardware instructions to simulate two logical cores into two physical chips, so that a single processor can use thread-level parallel computing, which is compatible with multi-threaded operating systems and software, reducing the idle time of the CPU and improving the operating efficiency of the CPU. Therefore, the CPU that supports Intel hyper-threading technology, after turning on the hyper-threading setting and allowing hyper-threading to run, the number of CPUs seen in the operating system is twice the actual number of physical CPUs, that is, 1 CPU can see two, and two can see four.

CPUs with hyper-threading technology need chipset and software support to give full play to the advantages of this technology.

What is a dual-core processor? What is the meaning behind the concept behind the dual-core processor? Put simply, a dual-core processor is a processor based on a single semiconductor that has two cores with the same functionality.

In other words, two physical processor cores are consolidated into a single core. Enterprise IT managers have also been looking for ways to improve performance without increasing the actual hardware footprint. Multi-core processor solutions address these needs, delivering enhanced performance without the need for more power or physical space.

The introduction of dual-core processor technology is an effective way to improve the performance of processors. Because the actual performance of the processor is the total number of instructions that the processor can process in each clock cycle, adding one core doubles the number of units that the processor can execute per clock cycle. Here we must emphasize that if you want your system to achieve maximum performance, you must take full advantage of all the executable units in both cores:

That is, all the execution units have work to do!

Why can't the dual-core products of IBM, HP and other manufacturers be popularized, because they are quite expensive and have never been widely used. For example, a dual-core IBM Power4 processor with 128MB L3 cache is 115x115mm in size, which is quite expensive to produce. Therefore, we cannot call dual-core processors like the IBM Power4 and HP PA8800 predecessors of AMD's upcoming dual-core processors.

At present, the application environment of x86 dual-core processors has been quite mature, most operating systems have supported parallel processing, and most of the new or upcoming application software has provided support for parallel technology, so once the dual-core processor is on the market, the improvement of system performance will be able to be rapidly improved. As a result, the entire software market is now fully prepared for multi-core processor architectures.

32-bit and 64-bit refer to the computing system in the processor, which refers to the length of data and the length of instruction addressing. 64 bits are addressed by 64 binary numbers. 32-bit computing can theoretically support 4G memory, but in practice it can only support 2G.

With the development of the Internet and enterprise informatization, the complexity of server applications is getting higher and higher, and the demand for memory is expanding very rapidly, and now a standard server with 1G and 2G memory is very common, and the 32-bit server has reached the end of technology today, and has to be upgraded to 64-bit.

What does hyperthreading mean for CPU? Don't worry, listen to the professionals explain to you slowly.