What is the unit of computer speed?

The unit of computer operation speed is "MIPS". MIPS refers to the average execution speed of single-word fixed-point instructions, that is, the number of millions of machine language instructions processed per second, and is an indicator of computer computing speed. MIPS is the rate of instruction execution, which stipulates that performance is inversely proportional to execution time. The faster the computer, the higher the MIPS value.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The unit of computer operation speed is "MIPS".

Operation speed: Operation speed is an important indicator of computer performance. Commonly referred to as computer operation speed (average operation speed), the abbreviation of MIPS (Million Instructions Per Second), the average execution speed of single-word fixed-point instructions, is the number of millions of machine language instructions processed per second.

MIPS is a measure of CPU speed. For example, an Intel80386 computer can process 3 million to 5 million machine language instructions per second, that is, we can say that 80386 is a 3 to 5 MIPS CPU. MIPS is just a measure of CPU performance. It refers to the number of instructions that can be executed per second, generally described as "million instructions/second". Microcomputers generally use the main frequency to describe the operation speed. The higher the main frequency, the faster the operation speed.

Nowadays, the frequency of CPUs is getting higher and higher, and they are pipelined, superscalar calculated, and dual-core and multi-core. It is no longer scientific to measure the speed of a computer simply by clock frequency. Use MIPS to measure relative comparison. Reasonable. MIPS is the rate of instruction execution, which stipulates that performance is inversely proportional to execution time. The faster the computer, the higher the MIPS value.

The recommended maximum operating frequency of S3C44B0X with ARM7 as the core is 66MHz. According to the technical information provided by ARM, the computing speed of Cortex A9 CPU can be calculated according to the following formula: MIPS=0.9×MHz, so it can be It is concluded that the maximum computing speed of the old model Arm 7 series S3C44B0X is approximately 0.9×66MHz=59.4MIPS. The 6M 51 microcontroller usually takes 12 or 24 clock cycles to complete an instruction, and multiplication and division instructions require 48 clock cycles. In this way, I initially estimate that the computing speed of the 6M 51 microcontroller should be between 0.2~0.5MIPS. It can be seen that there is still a huge difference in the computing speed of 8-bit machines and 32-bit machines.

Taking AVR as an example, its data throughput rate can reach 1MIPS/MHz, that is, the oscillation frequency of 1MHz can reach 1MIPS.

To sum up, it is reasonable to use MIPS to measure computer speed. Different CPUs have different maximum operating frequencies and different data throughput rates, so they cannot be generalized.

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