The performance of a microcomputer mainly depends on the performance of the CPU (Central Processing Unit). The CPU is the computing and control core of the computer system. It is the core hardware unit that controls and allocates all hardware resources of the computer (such as memory, input and output units) and performs general operations. The performance of the central processing unit (CPU) is decisive for computer performance. effect.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
The performance of a microcomputer mainly depends on the performance of the CPU (Central Processing Unit).
Central processing unit (CPU) is one of the main devices of an electronic computer and a core accessory in the computer.Its function is mainly to interpret computer instructions and process data in computer software. The CPU is the core component of the computer that reads instructions, decodes them, and executes them. The central processing unit mainly consists of two parts, namely the controller and the arithmetic unit, which also include cache memory and the data and control bus that realize the connection between them. The three core components of an electronic computer are the CPU, internal memory, and input/output devices. The main functions of the central processing unit are to process instructions, perform operations, control time, and process data.
In the computer architecture, the CPU is the core hardware unit that controls and allocates all hardware resources of the computer (such as memory, input and output units) and performs general operations. The CPU is the computing and control core of the computer. The operations of all software layers in the computer system will eventually be mapped to CPU operations through the instruction set.
That is: the CPU is the computing and control core of the computer system, and the performance of the CPU plays a decisive role in the computer performance.
Extended knowledge: Computer performance
Various scales can be used to measure computer system performance, but the most reliable measurement scale is time. Time can be defined differently according to the calculation method, such as response time, CPU time, etc.
Response time refers to the waiting time required for the user to obtain the result he needs after sending a task to the computer system. This includes disk access and main memory access time, CPU computing time, I/O action time, and operating system work time overhead.
Although this definition is more intuitive, for multi-programming, since the CPU can switch to executing other programs while a program is waiting for I/O operations, the response time cannot distinguish this situation.
Another situation is to consider only CPU time, which can be distinguished at this time. It will not include the time waiting for I/O operations and the time spent by the CPU to run other programs. Of course, the CPU time itself can also be divided into user CPU time and system CPU time. System CPU time statistics are difficult to obtain accurately because this actually requires the operating system to perform self-measurements.
In addition, when comparing machines with different system codes, since the system CPU time is different, the error is larger, so it is more appropriate to use the user CPU time as the performance measurement time.
Of course, when measuring the performance of an unloaded system, response time is more appropriate, while measuring CPU performance is better to use user CPU time.
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