CPU performance has nothing to do with anything

What does cpu performance have nothing to do with?

Cpu performance has nothing to do with CPU power.

The performance of a CPU is mainly reflected in the speed at which it runs programs. Performance indicators that affect running speed include main frequency, FSB, and cache size.

Main frequency

Main frequency is also called clock frequency, the unit is megahertz (MHz) or gigahertz (GHz), which is used to indicate the speed of CPU operation and data processing. Generally, the higher the main frequency, the faster the CPU can process data.

CPU main frequency = FSB × frequency multiplication factor. There is a certain relationship between the main frequency and the actual computing speed, but it is not a simple linear relationship. Therefore, the main frequency of the CPU is not directly related to the actual computing power of the CPU. The main frequency indicates the speed of the digital pulse signal oscillation in the CPU.

FSB

The FSB is the base frequency of the CPU, the unit is MHz. The CPU's FSB determines the running speed of the entire motherboard.

Cache

The cache size is also one of the important indicators of the CPU, and the structure and size of the cache have a great impact on the CPU speed. The cache in the CPU runs at an extremely high frequency, generally and processing The processor operates at the same frequency, and the working efficiency is much greater than the system memory and hard disk.

During actual work, the CPU often needs to read the same data block repeatedly, and the increase in cache capacity can greatly improve the hit rate of reading data within the CPU without having to search for it in the memory or hard disk. , to improve system performance. However, due to factors such as CPU chip area and cost, the cache is very small.

Extended information:

Working process:

The CPU fetches instructions from memory or cache, puts them into the instruction register, and Decode instructions. It decomposes instructions into a series of micro-operations, and then issues various control commands to execute the micro-operation series to complete the execution of an instruction. Instructions are basic commands for a computer that specify the type and operands to perform an operation.

An instruction is composed of one or more bytes, including an opcode field, one or more fields related to the operand address, and some status words and feature codes that represent the machine status. Some instructions also directly include the operands themselves.

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