CN1670691A - System and method for regulating CPU frequency - Google Patents

Abstract

The invention discloses a system and method for adjusting CPU frequency. The system adopts a layered architecture, which includes an application layer, a driver layer, a hardware abstraction layer, and a hardware platform, wherein: the application layer includes a user interface, which is used to display the frequency of the CPU, and the user The interface intuitively adjusts the frequency of the CPU, and outputs a command signal for updating the CPU frequency according to the user's operation; the hardware abstraction layer includes a BIOS, which responds to the command signal and provides the function of adjusting the CPU frequency. The invention adopts a layered architecture, and the BIOS provides the function of adjusting the CPU frequency, so that developers only need to follow the standard interface to realize layered development. compatibility.

Description

System and method for adjusting CPU frequency

【Technical field】

The invention relates to a system and method for adjusting CPU parameters, in particular to a system and method for adjusting CPU frequency.

【Background technique】

In practical applications, different application programs require different operating speeds of a central processing unit (Central Processing Unit, CPU). For example, the operating speed of the CPU required by general file editing programs is relatively low. However, when a computer is used to process image data, or to exchange and transfer large amounts of data such as web browsing, the CPU must run at a relatively high speed to meet program performance. The power consumption, heat generation and noise of accessories are quite different when the CPU runs at different speeds. In order to save energy, reduce heat generation, and improve CPU performance, the frequency of the CPU needs to be adjusted according to actual application requirements.

There are many devices and methods for adjusting the CPU frequency on the market, such as the patent application with the publication number CN1359041A published by the State Intellectual Property Office of China on July 17, 2002, which is entitled "A Method for Adjusting the CPU Frequency According to the Utilization Rate of the CPU" ", which discloses a method for adjusting CPU frequency according to CPU utilization. The method includes the following steps: setting the comparison threshold value of the CPU utilization rate; comparing the measured value with the set threshold value; and adjusting the CPU frequency according to the comparison result. The specific adjustment steps of the CPU frequency are: adjust the effective working time TW of the CPU, set the adjustment pulse period T; superimpose the adjustment pulse period T with the fixed reference clock of the CPU; uniformly adjust TW and T in the adjustment pulse; obtain the CPU frequency, in order to A method to achieve energy saving, reduce calorific value, ensure CPU safety, and prolong CPU service life.

In addition, such as the No. 485281 patent announced by the Taiwan Intellectual Property Office on May 1, 2002, its name is "a computer system that can dynamically adjust its operating voltage and internal frequency by monitoring the CPU burden", which discloses a computer system that can A computer system that monitors the CPU load and dynamically adjusts its operating voltage and internal frequency. The system includes a CPU, a power supply, a memory, and a work monitoring circuit. The work monitoring circuit monitors the workload of the CPU through a memory/input and output port status signal line (M/IO signal line), and reports the monitoring result Stored in a workload register to form corresponding parameters representing the current workload of the CPU, while the memory contains a work adjustment program, which can be a part of the Basic Input/Output System (BIOS), and It can be executed in the CPU. When the work monitoring circuit finds that the work load of the CPU has changed significantly, it will send an interrupt command to call a BIOS service, and the BIOS service will execute the work adjustment program to dynamically adjust the power supply provided to the power supply through the power supply. The working voltage of the CPU, or adjust the working internal frequency of the CPU according to the parameters in the workload register.

The CPU frequency can be adjusted through the above two methods, so as to achieve the purpose of saving energy, reducing heat generation and improving CPU performance. However, the technical implementation of the above two inventions is relatively difficult, and the technical implementation depends on the type of BIOS, so the versatility and compatibility are relatively poor. In order to avoid the above-mentioned defects, it is necessary to provide a system and method with a layered architecture and the function of adjusting the CPU frequency provided by the BIOS.

【Content of invention】

The main purpose of the present invention is to provide a system and method for adjusting CPU frequency. The system adopts a layered architecture, which includes an application layer, a driver layer, a hardware abstraction layer and a hardware platform, and the hardware abstraction layer provides the function of adjusting CPU frequency. The application layer includes a user interface and a dynamic link library; the driver layer includes a driver model; the hardware abstraction layer includes a Basic Input/Output System (BIOS) and a flash memory, wherein the BIOS includes a frequency update module and a Data access module; the hardware platform includes a south bridge and a central processing unit (Central Processing Unit, CPU). The user interface is used to display the frequency of the CPU, and the user can directly adjust the frequency of the CPU through the user interface, and the user interface outputs a command signal to the dynamic link library according to the user's operation. The dynamic link library is used to receive the command signal output by the user interface, and forward the command signal to the driver model. The driver model is used to receive the command signal and forward the command signal to the BIOS. The BIOS receives the command signal, and updates the frequency of the mainboard clock generator according to the command signal by the frequency update module to update the frequency of the CPU; the data access module is used to store the frequency of the updated CPU in the flash memory, and from The current CPU frequency is read from the flash memory to be displayed on the user interface. The south bridge is used to connect BIOS and CPU. The CPU is used to execute applications to update the CPU frequency function.

The invention adopts a layered architecture, so that developers only need to comply with the standard interface to realize layered development, so as to achieve the purpose of rapid development, reduce the difficulty of program technical realization, and the program is easy to maintain. BIOS works together with specific hardware, and is controlled by a large number of hardware functions, so the present invention provides the function of adjusting CPU frequency by BIOS, which can reduce the complexity of the driver layer and achieve compatibility with different types of BIOS.

【Description of drawings】

FIG. 1 is a functional block diagram of the system for adjusting CPU frequency of the present invention.

FIG. 2 is a flow chart of adjusting CPU frequency in the present invention.

【Detailed ways】

As shown in FIG. 1 , it is a functional block diagram of the system for adjusting CPU frequency of the present invention. The system adopts a layered architecture, and the layered architecture includes an application layer, a driver layer, a hardware abstraction layer and a hardware platform. The application layer includes a user interface 10 and a dynamic link library 11; the driver layer includes a driver model 12; the hardware abstraction layer includes a basic input output system (BIOS) 13 and a flash memory 14, wherein the BIOS 13 includes a frequency update module 130 and a data access module 131 ; The hardware platform includes a south bridge 15 and a central processing unit (CPU) 16. The user interface 10 is used to display the frequency of the CPU 16 , and the user can intuitively adjust the frequency of the CPU 16 through the user interface 10 , and the user interface 10 outputs command signals to the dynamic link library 11 according to the user's operation. The dynamic link library 11 is used to receive the command signal output by the user interface 10 and forward the command signal to the driver model 12 . The driver model 12 is used to receive the command signal and forward the command signal to the BIOS 13 . The frequency update module 130 is used for updating the frequency of the motherboard clock generator to update the frequency of the CPU. The data access module 131 is used for storing the updated CPU frequency in the flash memory 14 , and reading the current CPU frequency from the flash memory 14 to display on the user interface 10 . The flash memory 14 is used to store the frequency of the CPU 16 . The south bridge 15 is used to connect the BIOS 13 and the CPU 16 . The CPU 16 is used to execute an application program to update the CPU frequency.

As shown in FIG. 2 , it is a flow chart of adjusting CPU frequency in the present invention. When adjusting the frequency of the CPU 16, the frequency of the CPU 16 is adjusted through the user interface 10 (step 20). The user interface 10 generates a command signal to adjust the frequency of the CPU 16 in response to the operation, and outputs the command signal to the dynamic link library 11 (step 21). The dynamic link library 11 receives the command signal and forwards the command signal to the driver model 12 (step 22). Driver model 12 receives the command signal and forwards the command signal to BIOS 13 (step 23). BIOS 13 receives the command signal (step 24). Then BIOS13 discriminates whether the frequency value that is used for updating is effective, wherein the content of discriminating comprises whether this frequency value is in the range of setting frequency, and this setting frequency is the minimum and highest frequency (step 25) that CPU16 normally operates needs. If the frequency value for updating is invalid, the program ends; if the frequency value for updating is valid, the BIOS13 adjusts the frequency of the motherboard clock generator according to the command signal to adjust the frequency of the CPU16 (step 26). Then BIOS13 reads the adjusted frequency of CPU16 (step 27). Then the adjusted frequency of the CPU 16 is sent to the user interface 10 through the driver model 12 and the dynamic link library 11 (step 28). Finally, the adjusted frequency of the CPU 16 is displayed on the user interface 10 (step 29).

Claims (8)

1. A system for adjusting CPU frequency, the system comprising an application layer, a driver layer, a hardware abstraction layer and a hardware platform, characterized in that, wherein: The application layer includes a user interface and a dynamic link library, the user interface is used to display the frequency of the central processing unit, the frequency of the central processing unit is adjusted through the user interface, and a command signal for updating the frequency of the central processing unit is output; The driver layer includes a driver model, and the dynamic link library and the driver model are used to forward the command signal; The hardware abstraction layer includes a flash memory and a BIOS, where: Flash memory is used to store the frequency of the CPU; The basic input and output system receives the command signal and provides the function of adjusting the frequency of the central processing unit, which includes: A frequency updating module is used for updating the frequency of the motherboard clock generator to update the frequency of the central processing unit; A data access module is used for storing the updated frequency of the central processing unit in the flash memory, and reading the current frequency of the central processing unit from the flash memory for displaying on the user interface. 2. The system for adjusting CPU frequency as claimed in claim 1, wherein the dynamic link library is used to receive the command signal output by the user interface, and forwards the command signal to the driver model; the driver model is used to receive The command signal output by the user interface, and the command signal is forwarded to the basic input output system. 3. The system for adjusting CPU frequency as claimed in claim 1, wherein said hardware platform includes a south bridge and a central processing unit, and the south bridge is used for connecting the basic input output system and the central processing unit. 4. The system for adjusting CPU frequency as claimed in claim 3, wherein said central processing unit is used to execute an application program to update the central processing unit frequency. 5. A method for adjusting CPU frequency, characterized in that the method comprises the following steps: A user interface is provided, through which the frequency of the central processing unit is adjusted, and the user interface outputs a command signal for adjusting the frequency of the central processing unit in response to the operation; Provide a dynamic link library to receive and forward command signals output by the user interface; Provide a driver model to receive and forward the command signal; providing a basic input output system, receiving the command signal, and then identifying whether the frequency value used for updating is valid; and If the frequency value for updating is valid, the BIOS adjusts the frequency of the motherboard clock generator according to the command signal to adjust the frequency of the central processing unit. 6. the method for adjusting CPU frequency as claimed in claim 5, is characterized in that, the content of described discrimination comprises whether this frequency value is in the value domain of setting frequency, and this setting frequency is that central processing unit normally runs needs lowest and highest frequencies. 7. The method for adjusting CPU frequency as claimed in claim 5, further comprising the step of: if the frequency value used for updating is invalid, then end the operation process. 8. The method for adjusting CPU frequency as claimed in claim 5, further comprising the following steps: The basic input and output system reads the adjusted frequency of the CPU; Send the adjusted frequency of the CPU to the user interface through the driver model and the dynamic link library; and The frequency adjusted by the CPU is displayed on the user interface.

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