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What this article shares with you is about the reliability of microcomputer performance indicators. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article. Let's take a look at it with the editor.

The reliability in the performance index of a microcomputer refers to the ability of a computer system to continuously perform its functions under specified conditions and within a specified period of time. The performance indexes of microcomputer are: word length, clock main frequency, operation speed, storage capacity, access cycle, reliability, maintainability, average fault-free time and so on.

After the acceptance of a product is qualified and put into operation, the whole product can not work normally because of component faults (vibration, wear, dust, temperature difference, discharge, etc.) for a long time, and it can work well after troubleshooting. At this time, the good and bad nature can be expressed by the reliability of the product.

For example, if a certain type of rocket is launched five times and fails four times, the reliability measured by the number of times is 20%. For another example, if an aircraft is grounded for 156hours and is expected to be overhauled for 3000 hours, the reliability measured by fault-free time is (1-156) × 100% (94.8%).

Computer reliability

The reliability of a computer system is also defined in this way: the ability of a computer system to perform its due functions within a given period of time.

Because the computer system is composed of hardware and software, their influence on the reliability of the whole system shows completely different characteristics: the hardware is the same as the mechanical parts of the general manual products, and it will go wrong over a long time. Software, on the other hand, is more reliable as time goes on. Because the hidden errors have been discovered and eliminated one after another, it has no problems such as wear, oxidation, loosening and so on.

Therefore, the reliability of computer refers to the study of the reliability of hardware and software respectively.

Extended knowledge: performance metrics

The performance index of computer involves many factors, such as architecture, software and hardware configuration, instruction set and so on. Generally speaking, there are the following technical indicators.

Word length

Word length refers to the number of bits of binary data that can be processed by computer computing units at the same time. The longer the word length, the higher the accuracy of the computer if it is used to store data, and the stronger the processing power of the computer is if it is used as a storage instruction. Usually the word length is always an integral multiple of 8, such as 8, 16, 32, 64 bits, and so on. Both Intel 486 and Pentium 4 are 32-bit computers.

Clock main frequency

Clock frequency refers to the clock frequency of CPU, which to a certain extent determines the speed of the computer. The main frequency is in megahertz (MHz). Generally speaking, the higher the main frequency, the faster the speed. Due to the rapid development of microprocessors, the main frequency of microprocessors is also increasing.

Operation speed

The computing speed of a computer usually refers to the number of instructions that can be executed per second, often expressed in millions of times per second (MIPS,MillionInstructions Second). This index can more directly reflect the speed of the machine.

Storage capacity

Storage capacity is usually divided into memory capacity and external memory capacity, which mainly refers to the capacity of internal memory. Obviously, the larger the memory capacity, the more programs the machine can run and the stronger the processing power will be. In particular, the current multimedia PC applications often involve image information processing, which requires more and more storage capacity, and even can not run some software without enough memory capacity. At present, the memory capacity of most microcomputers has reached 4GB.

Access cycle

The access cycle of internal memory is also one of the main indicators that affect the performance of the whole computer system. Simply put, the access cycle is the time it takes for CPU to access data from internal memory. Currently, the access cycle of memory is between 7-70ns.

In addition, the reliability, maintainability, average time between failures and the ratio of performance to price are also the technical indicators of the computer.

The above is what the reliability of the microcomputer performance index is, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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